Receive the method and its equipment of synchronization signal block
阅读说明：本技术 接收同步信号块的方法及其设备 (Receive the method and its equipment of synchronization signal block ) 是由 高贤秀 金炳勋 金沂濬 尹硕铉 金银善 金永燮 于 2018-07-27 设计创作，主要内容包括：公开了一种在无线通信系统中由用户设备接收同步信号块(SSB)的方法。该方法包括以下步骤：从服务小区接收第一SSB；从邻居小区接收第二SSB；基于包括在第一SSB中的物理广播信道(PBCH)来获得第一SSB的时间信息；以及使用第一SSB的时间信息来获得第二SSB的索引。(Disclose a kind of method that synchronization signal block (SSB) is received by user equipment in a wireless communication system.Method includes the following steps: receiving the first SSB from serving cell；The 2nd SSB is received from neighbor cell；The temporal information of the first SSB is obtained based on including the Physical Broadcast Channel (PBCH) in the first SSB；And the index of the 2nd SSB is obtained using the temporal information of the first SSB.)
1. a kind of method for receiving synchronization signal block SSB by user equipment (UE) in a wireless communication system, this method includes following Step:
The first SSB is received from serving cell；
The 2nd SSB is received from neighbor cell；
The temporal information of the first SSB is obtained based on including the Physical Broadcast Channel PBCH in the first SSB；And
The index of the 2nd SSB is obtained using the temporal information of the first SSB.
2. according to the method described in claim 1,
Wherein, the temporal information of the first SSB obtained includes the index information of the first SSB.
3. according to the method described in claim 1,
Wherein, the index of the 2nd SSB is the index of the first SSB obtained by the payload by the PBCH 3 highest significant bits and by include PBCH demodulated reference signal DMRS in the 2nd SSB obtain described second 3 minimum effective bits of the index of SSB combine to determine.
4. according to the method described in claim 1,
Wherein, the index of the first SSB is the index of the first SSB obtained by the payload by the PBCH 3 highest significant bits and by include PBCH demodulated reference signal DMRS in the first SSB obtain described first 3 minimum effective bits of the index of SSB combine to determine,
3 bit indications in 3 highest significant bits and 3 minimum effective bits pass through will be from the service The position for the candidate SSB that cell is sent is grouped into the group of predetermined quantity and the first SSB institute in multiple SSB groups for obtaining The SSB group of category, and
Position of first SSB in the SSB group belonging to the first SSB described in other 3 bit indications.
5. according to the method described in claim 1,
It wherein, is small based on the service by being mapped with the sequence for the demodulated reference signal DMRS that the symbol of the PBCH is sent The index of the identifier in area and the first SSB generates.
6. according to the method described in claim 1,
Wherein, the field for sending the first SSB is the scramble sequence by the PBCH and the symbol by being mapped with the PBCH The frequency location of number demodulated reference signal DMRS sent identifies.
7. according to the method described in claim 1,
Wherein, the scramble sequence of the PBCH used in specific duration is equal.
8. according to the method described in claim 1,
Wherein, the clothes are depended on by being mapped with the frequency location for the demodulated reference signal DMRS that the symbol of the PBCH is sent The identifier for cell of being engaged in.
9. according to the method described in claim 1,
Wherein, the user equipment assumes that every resource element ENERGY E PRE of the PBCH is equal to by being mapped with the PBCH's The EPRE for the demodulated reference signal DMRS that symbol is sent.
10. according to the method described in claim 1, this method is further comprising the steps of:
Receive the instruction for indicating whether the temporal information of the first SSB can be used in obtaining the index of the 2nd SSB.
11. a kind of user equipment for receiving synchronization signal block SSB in a wireless communication system, the user equipment include:
Transceiver, the transceiver are configured as sending signal to multiple cells and from multiple cell received signals；And
Processor, the processor are connected to the transceiver and are configured as:
It controls the transceiver and receives the first SSB from serving cell,
It controls the transceiver and receives the 2nd SSB from neighbor cell,
The temporal information of the first SSB is obtained based on including the Physical Broadcast Channel PBCH in the first SSB, and
The index of the 2nd SSB is obtained using the temporal information of the first SSB.
12. user equipment according to claim 11,
Wherein, the temporal information of the first SSB obtained includes the index information of the first SSB.
13. user equipment according to claim 11,
It wherein, is small based on the service by being mapped with the sequence for the demodulated reference signal DMRS that the symbol of the PBCH is sent The index of the identifier in area and the first SSB generates.
14. user equipment according to claim 11,
Wherein, the scramble sequence of the PBCH used in specific duration is equal.
15. user equipment according to claim 1,
Wherein, the user equipment assumes that every resource element ENERGY E PRE of the PBCH is equal to by being mapped with the PBCH's The EPRE for the demodulated reference signal DMRS that symbol is sent.
Technical field
The present invention relates to the methods and its equipment that send and receive synchronization signal block.More particularly it relates to a kind of It is only that a synchronization signal block decoding is another same to obtain when receiving synchronization signal block from serving cell and neighbor cell respectively Walk the method and its equipment of the temporal information of block.
Background technique
Due to needing bigger communication service with the more and more communication devices of current trend, with traditional LTE system phase Than needing next-generation 5th generation (5G) system to provide enhancing wireless broadband communication.In next-generation 5G system, communication scenes quilt It is divided into enhancing mobile broadband (eMBB), super reliability and low latency communication (URLLC), large-scale machines type communication (mMTC) etc..
Herein, eMBB is by under spectral efficient, high user experience data rate and peak data rates characterization One third-generation mobile communication scene, URLLC are by the next generation mobile communication of ultrahigh reliability, ultralow delay and superelevation availability characterization Scene (for example, vehicle is to all (V2X), emergency services and long-range control), mMTC be by low cost, low energy consumption, it is short be grouped and The next generation mobile communication scene (for example, Internet of Things (IoT)) of extensive connection characterization.
Summary of the invention
Technical problem
The present invention provides a kind of methods and its equipment for sending and receiving synchronization signal block.
Those of it will be understood by those skilled in the art that be not limited to be described in detail above using the purpose that the disclosure is realized, The achievable above and other purpose of the disclosure will be more clearly understood that from described in detail below.
Technical solution
According to an aspect of the present invention, synchronous letter is received by user equipment in a wireless communication system there is provided herein a kind of The method of number block (SSB), method includes the following steps: receiving the first SSB from serving cell；Second is received from neighbor cell SSB；The temporal information of the first SSB is obtained based on including the Physical Broadcast Channel (PBCH) in the first SSB；And use the The temporal information of one SSB obtains the index of the 2nd SSB.
The temporal information of first SSB obtained may include the index information of the first SSB.
The index of 2nd SSB can be by 3 highest effective ratios of the index for the first SSB that the payload by PBCH obtains Special and the index by including the 2nd SSB that the PBCH demodulated reference signal (DMRS) in the second SSB obtains 3 minimum to have The combination of bit is imitated to determine.
The index of first SSB can be by 3 highest effective ratios of the index for the first SSB that the payload by PBCH obtains Special and the index by including the first SSB that the PBCH demodulated reference signal (DMRS) in the first SSB obtains 3 minimum to have The combination of bit is imitated to determine.3 bits in 3 highest significant bits and 3 minimum effective bits can be indicated by can be from The position for the candidate SSB that serving cell is sent is grouped into the group of predetermined quantity and in multiple SSB group for obtaining belonging to the first SSB SSB group, and other 3 bits can indicate position of the first SSB in the SSB group belonging to the first SSB.
The sequence for the demodulated reference signal (DMRS) that symbol by being mapped with PBCH is sent can be based on the mark of serving cell The index of symbol and the first SSB are known to generate.
The field for sending the first SSB can be joined by the demodulation that the scramble sequence of PBCH and the symbol by being mapped with PBCH are sent The frequency location of signal (DMRS) is examined to identify.
The scramble sequence of the PBCH used in specific duration can be equal.
It is small that the frequency location for the demodulated reference signal (DMRS) that symbol by being mapped with PBCH is sent may depend on service The identifier in area.
User equipment may be assumed that every resource element energy (EPRE) of PBCH is equal to and be sent by the symbol for being mapped with PBCH Demodulated reference signal (DMRS) EPRE.
This method, which can comprise the further steps of: to receive, indicates whether the temporal information of the first SSB can be used in acquisition second The instruction of the index of SSB.
According to another aspect of the present invention, synchronization signal block is received in a wireless communication system there is provided herein a kind of (SSB) user equipment, the user equipment include: transceiver, are configured as sending signal to multiple cells and from multiple Cell received signal；And processor, be connected to transceiver and be configured as: control transceiver receives the from serving cell One SSB, control transceiver receives the 2nd SSB from neighbor cell, based on including the Physical Broadcast Channel (PBCH) in the first SSB The temporal information of the first SSB is obtained, and obtains the index of the 2nd SSB using the temporal information of the first SSB.
The temporal information of first SSB obtained may include the index information of the first SSB.
The sequence for the demodulated reference signal (DMRS) that symbol by being mapped with PBCH is sent can be based on the mark of serving cell The index of symbol and the first SSB are known to generate.
The scramble sequence of the PBCH used in specific duration can be equal.
User equipment may be assumed that every resource element energy (EPRE) of PBCH is equal to and be sent by the symbol for being mapped with PBCH Demodulated reference signal (DMRS) EPRE.
Beneficial effect
According to the present invention, due to do not decoded even if from the received synchronization signal block in neighbor cell can also obtain it is small from neighbours The index of the received synchronization signal block in area, decoding complex degree can reduce.
Those of it will be understood by those skilled in the art that be not limited to be described in detail above using the effect that the disclosure is realized, Other effects of the disclosure will be more clearly understood that from the detailed description carried out below in conjunction with attached drawing.
Detailed description of the invention
Fig. 1 is to show meeting between user equipment (UE) and evolution UMTS terrestrial radio access network network (E-UTRAN) The control plane and user plane of the radio interface protocol of the 3rd generation partner program (3GPP) radio access network standard The diagram of framework.
Fig. 2 is to show the physical channel in 3GPP system and the general signal transmission method using these physical channels Diagram.
Fig. 3 is the diagram for showing the radio frame structure that synchronization signal (SS) is sent in long term evolution (LTE) system.
Fig. 4 is the diagram for showing available example slot structure in new radio access technologies (NR).
Fig. 5 is the diagram for showing the exemplary connection scheme between transceiver unit (TXRU) and antenna element.
Fig. 6 is the diagram that mixed-beam shaped structure is abstractively shown in terms of TXRU and physical antenna.
Fig. 7 is that the wave beam shown during downlink (DL) transmission for synchronization signal and system information mops up (beam Sweeping diagram).
Fig. 8 is the diagram for showing the exemplary cell in NR system.
Fig. 9 to Figure 12 is the diagram for illustrating the configuration method of synchronization signal burst and synchronization signal burst set.
Figure 13 to Figure 18 is to show the method being indexed to synchronization signal and instruction synchronization signal index, System Frame Number (SFN) and the diagram of the method for field.
Figure 19 to Figure 31 is the diagram for showing the performance measurements of embodiment according to the present invention.
Figure 32 is the diagram for the method for illustrating half boundary information of acquisition of embodiment according to the present invention.
Figure 33 and Figure 34 is the diagram of the embodiment for illustrating to configure the bandwidth of synchronization signal and DL common signal channel.
Figure 35 is the block diagram of the communication device of embodiment according to the present invention.
Specific embodiment
The embodiment of the present disclosure described by referring to accompanying drawing, will readily appreciate that the disclosure configuration, operation and its Its feature.Embodiment of the present disclosure set forth herein is that the technical characteristic of the disclosure is applied to the 3rd generation affiliate Plan the example of (3GPP) system.
Although embodiment of the present disclosure is under the background of long term evolution (LTE) and LTE-advanced (LTE-A) system Description, is merely exemplary.Therefore, embodiment of the present disclosure is suitable for any other communication system, as long as above-mentioned definition It is effective to communication system.
It includes remote radio heads (RRH), evolution node B (eNB or eNode that term base station (BS), which can be used for covering, B), the meaning of the term of sending point (TP), receiving point (RP), repeater etc..
3GPP communication standard, which is defined, is originated from high-rise resource element (RE) of information corresponding downlink with carrying (DL) physical channel and within the physical layer using and with not carrying from the corresponding DL physical signal of the high-rise RE of information.Example Such as, physical down link sharing channel (PDSCH), Physical Broadcast Channel (PBCH), Physical Multicast Channel (PMCH), physical control Format indicator channel (PCFICH), physical downlink control channel (PDCCH) and Physical Hybrid ARQ Indicator channel (PHICH) it is defined as DL physical channel, reference signal (RS) and synchronization signal (SS) are defined as DL physical signal.RS ( Referred to as pilot signal) it is the signal with predefined special waveform known to gNode B (gNB) and UE the two.For example, cell The specific specific RS of RS, UE (UE-RS), positioning RS (PRS) and channel state information RS (CSI-RS) are defined as DL RS.3GPP LTE/LTE-A standard, which is defined, is originated from corresponding uplink (UL) physical channel of the high-rise RE of information with carrying and in object Used in reason layer and with do not carry from the corresponding UL physical signal of the high-rise RE of information.For example, physical uplink link is total It enjoys channel (PUSCH), physical uplink control channel (PUCCH) and Physical Random Access Channel (PRACH) and is defined as UL Physical channel, the detection for UL control/data-signal demodulated reference signal (DMRS) and for UL channel measurement is with reference to letter Number (SRS) is defined as UL physical signal.
In the disclosure, PDCCH/PCFICH/PHICH/PDSCH refers to bearing downlink link control message (DCI)/control Format indicator (CFI)/DL ack/nack (ACK/NACK)/DL data time-frequency resources set or RE's Set.In addition, PUCCH/PUSCH/PRACH refer to carrying UL control information (UCI)/UL data/accidental access signal when it is m- The set of frequency resource or the set of RE.In the disclosure, specifically, distribute to or belong to PDCCH/PCFICH/PHICH/ The time-frequency resources or RE of PDSCH/PUCCH/PUSCH/PRACH are referred to as PDCCH RE/PCFICH RE/PHICH RE/ PDSCH RE/PUCCH RE/PUSCH RE/PRACH RE or PDCCH resource/PCFICH resource/PHICH resource/PDSCH money Source/PUCCH resource/PUSCH resource/PRACH resource.Hereinafter, then this means if UE sends PUCCH/PUSCH/PRACH UCI/UL data/accidental access signal is sent on PUCCH/PUSCH/PRACH or through PUCCH/PUSCH/PRACH.In addition, If gNB sends PDCCH/PCFICH/PHICH/PDSCH, then this mean on PDCCH/PCFICH/PHICH/PDSCH or DCI/, which is sent, by PDCCH/PCFICH/PHICH/PDSCH controls information.
Hereinafter, being assigned CRS/DMRS/CSI-RS/SRS/UE-RS or configured with CRS/DMRS/CSI-RS/SRS/UE-RS Orthogonal frequency division multiplexing (OFDM) symbol/carrier wave/subcarrier/RE be referred to as CRS/DMRS/CSI-RS/SRS/UE-RS symbol/load Wave/subcarrier/RE.For example, be assigned tracking RS (TRS) or the OFDM symbol configured with TRS be referred to as TRS symbol, be assigned TRS or subcarrier configured with TRS are referred to as TRS subcarrier, are assigned TRS or the RE configured with TRS is referred to as TRS RE.This Outside, the subframe for being configured as sending TRS is referred to as TRS subframe.In addition, carrying broadcast singal subframe be referred to as broadcast sub-frame or The subframe of PBCH subframe, carrying synchronization signal (SS) (for example, primary synchronization signal (PSS) and/or secondary synchronization signal (SSS)) is claimed For SS subframe or PSS/SSS subframe.It is assigned PSS/SSS or OFDM symbol/subcarrier/RE configured with PSS/SSS is referred to as PSS/SSS symbol/subcarrier/RE.
In the disclosure, the port CRS, the port UE-RS, the port CSI-RS and the port TRS refer respectively to be configured as sending The antenna port of CRS, be configured as send UE-RS antenna port, be configured as send CSI-RS antenna port and by It is configured to send the antenna port of TRS.The antenna port for being configured as sending CRS can be occupied by CRS according to the port CRS The position of RE is distinguished from each other, be configured as sending UE-RS antenna port can according to UE-RS port by UE-RS occupied by The position of RE be distinguished from each other, the antenna port for being configured as sending CSI-RS can pass through CSI-RS institute according to the port CSI-RS The position of the RE of occupancy is distinguished from each other.Therefore, the port term CRS/UE-RS/CSI-RS/TRS is also used for indicating predetermined resource By the pattern of the CRS/UE-RS/CSI-RS/TRS RE occupied in region.
Fig. 1 shows meeting between user equipment (UE) and evolution UMTS terrestrial radio access network network (E-UTRAN) Control plane and user-plane protocol stack in the radio interface protocol architecture of 3GPP wireless access network standard.Control plane It is that UE and E-UTRAN sends control message to manage the path of calling, user plane is to send the data (example generated from application layer Such as, voice data or internet packet data) path.
Physics (PHY) layer at 1 (L1) of layer provides information transmission service to its high-rise (medium access control (MAC) layer). PHY layer is connected to MAC layer via transmission channel.Transmission channel transmits data between MAC layer and PHY layer.In transmitter and connect Data are sent on physical channel between the PHY layer of receipts machine.Physical channel uses time and frequency as radio resource.Specifically Ground says, for downlink (DL) according to orthogonal frequency division multiple access (OFDMA) modulation physical channel, for uplink (UL) according to Single-carrier frequency division multiple access (SC-FDMA) modulation physical channel.
MAC layer at 2 (L2) of layer provides service to its high-rise (radio link controls (RLC) layer) via logic channel. Rlc layer at L2 supports reliable data transmission.RLC function can be realized in the functional block of MAC layer.Packet data convergence at L2 Agreement (PDCP) layer executes header-compressed, to reduce the amount of unnecessary control information, and therefore via with narrow bandwidth Air interface effectively sends Internet protocol (IP) grouping (such as IP version 4 (IPv4) or IP version 6 (IPv6) grouping).
Radio resource control (RRC) layer of the lowest portion of 3 (or L3) of layer is only defined in control plane.RRC The configuration, reconfiguration and the related logic channel of release, transmission channel and physical channel of layer control and radio bearer.Radio Carrying refers to the service for the data transmission between UE and E-UTRAN provided at L2.For this purpose, UE and E- The rrc layer of UTRAN exchanges RRC information each other.If establishing RRC connection between UE and E-UTRAN, UE is in RRC connection Mode, otherwise, UE are in RRC idle mode.It includes session management and shifting that non access stratum (NAS) layer above rrc layer, which executes, The function of mobility management.
For including the broadcast channel of bearing system information from the DL transmission channel that E-UTRAN is sent to UE by data (BCH), the paging channel (PCH) of bearing call message and the shared channel (SCH) of carrying customer service or control message.It can Sent on DL SCH or individually defined DL Multicast Channel (MCH) DL multicast service or control message or DL broadcasting service or Control message.For by data from the UL transmission channel that UE is sent to E-UTRAN include carry initial control message at random connect Enter channel (RACH) and carries the UL SCH of customer service or control message.Face defines and is mapped on transport channels The logic channel of transmission channel includes broadcast control channel (BCCH), Paging Control Channel (PCCH), common control channel (CCCH), multicast control channel (MCCH), Logical Traffic Channels (MTCH) etc..
The conventional method of signal is sent Fig. 2 shows the physical channel in 3GPP system and on these physical channels.
Referring to Fig. 2, when UE is energized or when into new cell, UE executes search of initial zone (S201).Initial cell Search is related to obtaining synchronous with eNB's.In particular, by receiving primary synchronization channel (P-SCH) and auxiliary synchronization channel from eNB (S-SCH), UE by its Timing Synchronization to eNB and obtains cell identifier (ID) and other information.Then, UE can by from ENB receives Physical Broadcast Channel (PBCH) to obtain the information broadcasted in cell.During search of initial zone, UE can be by connecing Downlink reference signal (DLRS) is accepted to monitor DL channel status.
After search of initial zone, UE can be by receiving physical downlink control channel (PDCCH) and based on packet It includes the information in PDCCH and receives physical down link sharing channel (PDSCH) to obtain detailed system information (S202).
If UE initial access eNB or the radio resource without being transferred to eNB for signal, UE can be executed with eNB Random access procedure (S203 to S206).In the random access procedure, UE can be sent on Physical Random Access Channel (PRACH) Predetermined sequence as lead code (S203 and S205), and can PDCCH and on the associated PDSCH of PDCCH receive for The response message (S204 and S206) of the lead code.In the case where RACH competition-based, in addition UE can execute contention resolved Process.
After the above process, UE can receive PDCCH and/or PDSCH (S207) from eNB, and send physically to eNB Ink Shared Channel (PUSCH) and/or physical uplink control channel (PUCCH) (S208), this is general DL and UL Signals transmission.In particular, UE receives down link control information (DCI) on PDCCH.Here, DCI includes control letter Breath (for example, the resource allocation information for being directed to UE).Different DCI formats is defined according to the different purposes of DCI.
UE is sent to eNB on UL or includes DL/UL ack/nack from the received control information of eNB on DL (ACK/NACK) signal, channel quality indicator (CQI), pre-coding matrix index (PMI), order designator (RI) etc..In 3GPP In LTE system, UE can send control information (for example, CQI, PMI, RI etc.) on PUSCH and/or PUCCH.
Fig. 3 is the figure for showing the radio frame structure that synchronization signal (SS) is sent in LTE system.Specifically, Fig. 3 is shown The radio frame structure of synchronization signal and PBCH is sent with frequency division duplex (FDD).(a) of Fig. 3 is shown by normal cyclic prefix (CP) position of SS and PBCH is sent in the radio frame configured, (b) of Fig. 3 is shown in the radio frame by extension CP configuration Send the position of SS and PBCH.
SS will be more fully described referring to Fig. 3.SS is classified as primary synchronization signal (PSS) and secondary synchronization signal (SSS). PSS is used to obtain the Domain Synchronous and/or frequency domain synchronization of OFDM symbol synchronization, slot synchronization etc..Also, SSS is for obtaining The CP of frame synchronization, cell group ID and/or cell is taken to configure (that is, instruction is the information using normal CP or extension CP).Reference Fig. 4 sends PSS and SSS by two OFDM symbols in each radio frame.Specifically, it is wirelessly electrically accessed skill for convenience It is measured (between RAT) between art, considers that GSM (global system for mobile communications) frame length of 4.6ms is each in subframe 0 and subframe 5 SS is sent in the first time slot in a.In particular, in the first time slot of subframe 0 and each of the first time slot of subframe 5 Last OFDM symbol in send PSS.Also, in each of the first time slot of subframe 0 and the first time slot of subframe 5 SSS is sent in penultimate OFDM symbol.The boundary of corresponding radio frame can be detected by SSS.In the last of corresponding time slot PSS is sent in OFDM symbol, and sends SSS in the OFDM symbol before the OFDM symbol for sending PSS.According to SS Transmission diversity scheme, be used only individual antenna port.However, not having individually to define the transmission of SS standard in Current standards Diversity scheme.
Referring to Fig. 3, by detecting PSS, UE may know that corresponding subframe is one in subframe 0 and subframe 5, because every 5ms sends PSS, but UE can not know that subframe is subframe 0 or subframe 5.That is, frame synchronization only can not be obtained from PSS.UE according to Detection detects the boundary of radio frame in a manner of the SSS that different sequences is sent twice in a radio frame.
UL is executed in correct time demodulating and determining by DL signal by using PSS/SSS execution cell search process After time needed for signal transmission and frequency parameter, UE can the only system information needed for the system configuration for obtaining UE from eNB It is communicated later with eNB.
System information is configured with Master Information Block (MIB) and system information block (SIB).Each SIB includes functionally relevant The set of parameter, and according to included parameter be classified as MIB, SIB Class1 (SIB1), SIB type 2 (SIB2) and SIB3 to SIB8.
MIB includes the parameter that UE is initially accessed most frequent transmission necessary to the network serviced as eNB.UE can pass through broadcast Channel (for example, PBCH) receives MIB.MIB includes dl system bandwidth (DL BW), PHICH configuration and System Frame Number (SFN).Therefore, UE can clearly know the information configured about DL BW, SFN and PHICH by receiving PBCH.On the other hand, UE can impliedly know the information of the quantity of the transmission antenna port about eNB.By will be corresponding with the quantity of transmission antenna Sequence masks (for example, XOR operation) are impliedly used to 16 bit cyclic redundancies (CRC) of the mistake for detecting PBCH Signal notifies the information of the quantity of the transmission antenna about eNB.
SIB1 not only include about to other SIB when domain scheduling information, but also be included in cell selection determine it is special Determine the whether suitable required parameter of cell.UE receives SIB1 via broadcast signaling or dedicated signaling.
DL carrier frequency and correspondence system bandwidth can be obtained by the MIB that PBCH is carried.It can be by corresponding with DL signal System information obtain UL carrier frequency and correspondence system bandwidth.After receiving MIB, if do not deposited in respective cell Effective system information is stored up, then the value that UE is included within the DL BW in MIB is applied to UL bandwidth, until receiving system information block Type 2 (SystemInformationBlockType2, SIB2).For example, UE can be by including if UE obtains SIB2 UL carrier frequency and the identification of UL bandwidth information in SIB2 can be used in the entire UL system bandwidth of UL transmission.
In a frequency domain, regardless of real system bandwidth, referring to the DC subcarrier in corresponding OFDM symbol in 6 RB in total PSS/SSS and PBCH is sent in (that is, 3, left side RB and 3, right side RB).In other words, PSS/ only is sent in 72 subcarriers SSS and PBCH.Therefore, UE is configured as detecting or decodes SS and PBCH, but regardless of the downlink transmission bandwidth configured for UE How.
After completing search of initial zone, random access procedure is can be performed to complete access eNB in UE.For this purpose, UE via PRACH (Physical Random Access Channel) sends lead code and may be in response to lead code to disappear via PDCCH and PDSCH reception response Breath.In the case where random access competition-based, additional PRACH can be transmitted and execute such as PDCCH and corresponding with PDCCH PDSCH contention resolved process.
After executing the above process, UE can be performed PDCCH/PDSCH and receive with PUSCH/PUCCH transmission as general UL/DL signals transmission.
Random access procedure is also referred to as random access channel (RACH) process.Random access procedure is used to include initially connecing Enter, UL synchronous adjustment, resource allocation, the various uses of switching etc..Random access procedure be classified as process competition-based and Dedicated (that is, being not based on competition) process.It is used to execute initial access generally, based on the random access procedure of competition.Another party Face, dedicated random access procedure are exclusively adapted for executing switching etc..When executing random access procedure competition-based, UE It is randomly chosen RACH preamble sequence.Therefore, multiple UE can send identical RACH preamble sequence simultaneously.As a result, hereafter Need contention resolved process.On the contrary, UE uses the RACH for being assigned exclusively to UE by eNB when executing dedicated random access procedure Preamble sequence.Therefore, random access procedure can be performed in UE, without conflicting from different UE.
Random access procedure competition-based includes 4 steps disclosed below.In the present invention via this 4 steps The message of transmission can be known respectively as message (Msg) 1 to 4.
Step 1:RACH lead code (via PRACH) (UE to eNB)
Step 2: random access response (RAR) (via PDCCH and PDSCH) (eNB to UE)
Step 3: 2/ layer of 3 message (via PUSCH) (UE to eNB) of layer
Step 4: contention resolution message (eNB to UE)
On the other hand, dedicated random access procedure includes 3 steps disclosed below.In the present invention via this 3 The message that step is sent can be known respectively as message (Msg) 0 to 2.Uplink transmission corresponding with PAR be can also carry out (that is, step It is rapid 3) as a part of random access procedure.Can be used for eNB with indicate the transmission of RACH lead code PDCCH (hereinafter, PDCCH order) trigger dedicated random access procedure.
Step 0: assigning (eNB to UE) via the RACH lead code of dedicated signaling
Step 1:RACH lead code (via PRACH) (UE to eNB)
Step 2: random access response (RAR) (via PDCCH and PDSCH) (eNB to UE)
After sending RACH lead code, UE attempts the receiving random access response in preconfigured time window (RAR).Specifically, UE, which attempts the detection in time window, has the PDCCH of RA-RNTI (random access RNTI) (hereinafter, RA- RNTI PDCCH) (for example, CRC that RA-RNTI mask is utilized in PDCCH).If detecting RA-RNTI PDCCH, UE It checks in PDSCH corresponding with RA-RNTI PDCCH with the presence or absence of the RAR to UE.RAR includes that instruction is determined for what UL was synchronized Timing advance (TA) information of hour offset information, UL resource allocation information (UL License Info), temporary UE identifier are (for example, face Shi little Qu-RNTI, TC-RNTI) etc..UE can execute UL transmission (example according to including resource allocation information in RAR and TA value Such as, message 3).To UL transmission application HARQ corresponding with RAR.Specifically, after sending message 3, UE be can receive and message 3 Corresponding reception response message (for example, PHICH).
The sequence that the cyclic prefix and length that random access lead code (that is, RACH lead code) is TCP by length are TSEQ Part forms.TCP and TSEQ depends on frame structure and random access configures.Lead code form is controlled by high level.In the UL sub-frame Send RACH lead code.The transmission of random access lead code is restricted to specific time resource and frequency resource.The resource quilt Referred to as PRACH resource.In order to match index 0 with lesser subframe is numbered in PRB and radio frame, the son in radio frame PRACH resource is numbered according to the ascending order of PRB in frame number and frequency domain.Index is configured according to PRACH to define random access Resource (refers to 36.211 normative document of 3GPP TS).RACH configuration index is provided by highest level signal (being sent by eNB).
In LTE/LTE-A system, for lead code form 0 to 3 and lead code form 4, random access lead code (that is, RACH lead code) subcarrier spacing respectively by 1.25kHz and 7.5kHz regulation (refer to 3GPP TS36.211).
<OFDM parameter set>
New RAT system uses OFDM transmission scheme or the transmission plan similar to OFDM transmission scheme.New RAT system can make With the OFDM parameter for being different from LTE OFDM parameter.Alternatively, new RAT system can follow the parameter set of traditional LTE/LTE-A, still With bigger system bandwidth (for example, 100MHz).Alternatively, a cell can support multiple parameters collection.That is, with different parameters The UE of collection operation can be coexisted in a cell.
<subframe structure>
In 3GPP LTE/LTE-A system, radio frame is 10ms (307200Ts) long, including 10 equal sizes Subframe (SF).It can assign and number to 10 SF of a radio frame.TsIt indicates the sampling time, and is represented as Ts=1/ (2048*15kHz).Each SF is 1ms, including two time slots.20 time slots of one radio frame from 0 to 19 can successively be compiled Number.Each time slot has the length of 0.5ms.It sends a SF the time it takes and is defined as Transmission Time Interval (TTI).When Between resource can by radio frame number (or radio frame index), No. SF (or SF index), timeslot number (or time slot index) etc. come It distinguishes.TTI refers to the interval of adjusting degree evidence.In current LTE/LTE-A system, for example, there are UL licenses or DL every 1ms Allowed transport chance, and there is no multiple UL/DL license chances in the time shorter than 1ms.Therefore, in traditional LTE/LTE-A system In, TTI 1ms.
Fig. 4 shows available example slot structure in new radio access technologies (NR).
In order to minimize data transmission delay, consider in the 5th generation (5G) NR control channel and data channel according to when The structure of time slot for dividing multiplexing (TDM) to be multiplexed.
In Fig. 4, the region for being marked with oblique line indicates to carry the transmission range of the DL control channel (for example, PDCCH) of DCI Domain, black portions indicate the transmission region of the UL control channel (for example, PUCCH) of carrying UCI.DCI is the control that gNB is sent to UE Information processed, and may include that the information for the cell configuration that will be appreciated that about UE, DL specific information (for example, DL is dispatched) and UL are special Determine information (for example, UL permits).In addition, UCI is the control information that UE is sent to gNB.UCI may include the HARQ of DL data ACK/NACK report, the CSI report of DL channel status, scheduling request (SR) etc..
In Fig. 4, the symbol with notation index 1 to notation index 12 can be used for carrying the physical channel (example of DL data Such as, PDSCH) transmission, and be also used to carry the transmission of the physical channel (for example, PUSCH) of UL data.According to Fig.2, Structure of time slot, when in one time slot successively occur DL transmission and UL transmission when, DL data can be executed in this time slot Transmission/reception and the UL ACK/NACK to DL data reception/transmission.As a result, when mistake occurs between data transfer period When, data retransmit the time it takes and can reduce, thus the minimizing delay for transmitting final data.
In this structure of time slot, need time slot with allow gNB and UE from sending mode be switched to reception pattern or Sending mode is switched to from reception pattern.For the switching between sending mode and reception pattern, in structure of time slot extremely with DL UL switching time, corresponding some OFDM symbols were configured to protect period (GP).
In traditional LTE/LTE-A system, DL control channel is multiplexed according to TDM and data channel, and control channel PDCCH is sent across total system frequency band distribution formula.However, in NR, it is contemplated that the bandwidth of a system will be at least about 100MHz, this makes infeasible across total frequency band transmission control channel.If UE monitors total frequency band for data transmission/reception To receive DL control channel, then this can increase the battery consumption of UE and reduce efficiency.It therefore, in the disclosure, can be in system DL control channel locally or is in a distributed manner sent in a certain frequency band (that is, channel band) in frequency band.
In NR system, BTU Basic Transmission Unit is time slot.Time-slot duration includes 14 symbols, and each symbol has just Normal cyclic prefix (CP), or including 12 symbols, each symbol has extension CP.In addition, time slot is in time according to being made The function of subcarrier spacing scales.That is, the length of time slot reduces as subcarrier spacing increases.For example it is assumed that every time slot 14 symbols, if the quantity of the time slot in 10-ms frame is 10, then for the son of 30kHz for the subcarrier spacing of 15kHz Intercarrier is away from the quantity of time slot is 20, and for the subcarrier spacing of 60kHz, the quantity of time slot is 40.As subcarrier spacing increases Add, the length of OFDM symbol reduces.The quantity of the OFDM symbol of every time slot is different according to normal CP or extension CP, and not root Change according to subcarrier spacing.Consider the maximum FFT size of basic 15-kHz subcarrier spacing and 2048, the basic time of LTE Unit TsIt was defined as 1/ (15000*2048) second.For 15-kHz subcarrier spacing, TsIt is also the sampling time.In NR system, Many other subcarrier spacing other than 15kHz are available, and since subcarrier spacing is inversely proportional with corresponding time span, so Actual samples time T corresponding with the subcarrier spacing of 15kHz is greater thansBecome shorter than 1/ (15000*2048) second.For example, The actual samples time of the subcarrier spacing of 30kHz, 60kHz and 120kHz may respectively be 1/ (2*15000*2048) second, 1/ (4* 15000*2048) second and 1/ (8*15000*2048) second.
<analog beam forming>
For the 5G mobile communication system discussed, consider using SHF band (that is, 6GHz or more than millimeter frequency Band) technology so as in broadband with high transfer rate to multiple users send data.This technology of 3GPP is referred to as NR, therefore In the disclosure, 5G mobile communication system will be referred to as NR system.However, due to using too high frequency band, millimeter frequency band has letter The frequency properties that decay too quickly number according to distance.Therefore, using at least 6GHz or more than frequency band NR system use The narrow beam transmission plan for sending signal on specific direction (rather than omni-directionally) with the energy of concentration, declines to compensate fast propagation Subtract and therefore overcome the reduction of the coverage area caused by fast propagation decaying.However, if coming using only a narrow beam Service is provided, then the service coverage of a gNB narrows, therefore gNB is provided in broadband by collecting multiple narrow beams Service.
As wavelength shortens in millimeter frequency band (that is, millimeter wave (mmW) frequency band), multiple days can be installed in the same area Thread elements.For example, can be pressed in the 30-GHz frequency band of the wavelength with about 1cm on 5 × 5cm panel according to two-dimentional (2D) array 100 antenna elements in total are installed according to (wavelength) interval of 0.5 λ.Accordingly, it is considered to by using mutiple antennas element in mmW Increase beam forming gain to increase coverage area or handling capacity.
In order to form narrow beam in millimeter frequency band, beam forming solutions are mainly considered, wherein gNB or UE passes through multiple days Line sends identical signal with phase difference appropriate, to only increase the energy on specific direction.These beam forming solutions packets It includes and generates the digital beam-forming of the phase difference between digital baseband signal, generates modulation using time delay (that is, cyclic shift) Analog signal between phase difference analog beam forming and using digital beam-forming and analog beam forming both Mixed-beam forming.If every antenna element provides TXRU to allow to control the phase and transimission power of every antenna, every frequency The independent beam forming of resource is possible.However, install TXRU for all about 100 antenna elements less has for cost Effect.That is, in order to compensate for fast propagation decaying in millimeter frequency band, it should use mutiple antennas, and digital beam-forming needs With the RF component of the quantity of antenna as many (for example, digital analog converter (DAC), mixer, power amplifier and Linear Amplifer Device).Therefore, the problem of digital beam-forming faces the increased costs of communication device is realized in millimeter frequency band.Therefore, in such as milli In the case where equally needing a large amount of antennas in rice frequency band, analog beam forming or mixed-beam forming are considered.Analog beam at In shape, mutiple antennas element is mapped to a TXRU, and the direction of wave beam is controlled by analog phase shifter.This analog beam The shortcomings that forming arrangements, is that frequency selective beam forming (BF) can not be provided, because only producing a wave in total frequency band Shu Fangxiang.BF is mixed between digital BF and simulation BF, wherein B TXRU for using than Q antenna element few.In mixing BF In, although the quantity of beam direction is different according to the connection between B TXRU and Q antenna element, can send simultaneously The direction of wave beam is restricted to B or following.
Fig. 5 is the diagram for showing the exemplary connection scheme between TXRU and antenna element.
(a) of Fig. 5 shows the connection between TXRU and subarray.In this case, antenna element is connected only to one TXRU.In contrast, (b) of Fig. 5 shows the connection between TXRU and all antenna elements.In this case, antenna element It is connected to all TXRU.In Fig. 5, W indicates the phase vectors that multiplication is subjected in analog phase shifter.That is, analog beam shapes Direction determined by W.Herein, CSI-RS antenna port can be one-to-one or one-to-many be mapped to TXRU.
As previously described, because the digital baseband signal or received digital baseband signal to be sent in digital beam-forming It is subjected to signal processing, so signal can be sent or received in a plurality of directions or from multiple directions on multiple wave beams.Compared to it Under, in analog beam forming, the analog signal or received analog signal to be sent are subjected to beam forming in a modulate state. Therefore, it is impossible to which the coverage area more than a wave beam sends or receives signal in a plurality of directions or from multiple directions.It depends on Broadband transmission or mutiple antennas property, gNB are usually communicated with multiple users simultaneously.If gNB is using simulation BF or mixes BF simultaneously Analog beam is formed on a beam direction, then in view of the essence of simulation BF, gNB can only be only and on identical simulation beam direction The user's communication covered.By reflecting that the limitation caused by the essence of simulation BF or mixing BF proposes the root being described later on According to RACH resource distribution of the invention and gNB utilization of resources scheme.
<hybrid analog-digital simulation beam forming>
Fig. 6 abstractively shows mixed-beam shaped structure in terms of TXRU and physical antenna.
The case where for using mutiple antennas, has occurred the mixing BF of digital BF and simulation BF combination.Simulation BF (or RF It BF) is the operation that precoding (or combination) is executed in RF unit.Due to pre- in each of Base Band Unit and RF unit Encode (combination), mixing BF provide approach number BF performance performance advantage, while reduce RF chain quantity and DAC (or Analog-digital converter (ADC)) quantity.For convenience's sake, mixing BF structure can be indicated by N number of TXRU and M physical antenna.It wants The digital BF of the L data Layer sent by transmitting terminal can be expressed as N N matrix, and then the digital signal of N number of conversion passes through TXRU is converted into analog signal and is subjected to being expressed as M × N matrix simulation BF.In Fig. 6, the quantity of digital beam is L, and And the quantity of analog beam is N.In addition, considering that gNB is configured as changing based on symbol simulation BF more to have in NR system Support the BF of UE of the contraposition in specific region in effect ground.In addition, when defining an aerial panel by N number of TXRU and M RF antenna When, it is also considered that introduce the mutiple antennas panel for being applicable in independent mixing BF.Therefore, in the case where gNB uses multiple analog beams, Signal at each UE is received may preferred different analog beam.Therefore, considering that wave beam mops up operation, wherein right In at least SS, system information and paging, gNB changes multiple analog beams based on symbol in particular time-slot or SF to allow There is UE that there is receiver meeting.
Fig. 7 is the diagram for showing the wave beam during DL transmission for SS and system information and mopping up.In Fig. 7, broadcast is new The physical resource or physical channel of the system information of RAT system are referred to as xPBCH.Analog beam from different antennae panel can It is sent simultaneously in a symbol, and is discussing and introduced as shown in Figure 7 for single mould corresponding with specific antenna panel The beam reference signal (BRS) that quasi- wave beam is sent, to measure the channel of every analog beam.Mutiple antennas port definition can be directed to BRS, and each antenna port of BRS can be corresponding with single analog beam.It is different from BRS, it can be directed to and be included in analog beam All analog beams in group send SS or xPBCH, so that any UE can be properly received SS or xPBCH.
Fig. 8 is the diagram for showing the exemplary cell in NR system.
Referring to Fig. 8, compared with the wireless communication system for traditional LTE that a such as eNB forms a cell, in NR system In discussing by multiple TRP configure a cell.If multiple TRP form a cell, even if the TRP of service UE changes Become, seamless communication can also be advantageously carried out, to facilitate the mobile management of UE.
Compared with the LTE/LTE-A system for omni-directionally sending PSS/SSS, a kind of gNB by application mmWave is considered The method that place sends the signal of such as PSS/SSS/PBCH by the way that beam direction is sequentially switched to the BF that all directions execute. It is referred to as wave beam by the signal transmission/reception that switching-beam direction executes to mop up or beam scanning.In the disclosure, " wave Beam is mopped up " be sender behavior, " beam scanning " is the behavior of recipient.For example, if at most N number of beam direction is to gNB It can use, then gNB sends the signal of such as PSS/SSS/PBCH on N number of beam direction.That is, gNB is by can be used or support in gNB Direction on mop up wave beam to send the SS of such as PSS/SSS/PBCH in all directions.Alternatively, if gNB is capable of forming N A wave beam, then wave beam can be grouped, and can be sent based on group/receive PSS/SSS/PBCH.One wave beam group includes one Or more wave beam.The signal of such as PSS/SSS/PBCH sent in the same direction can be defined as a SS block (SSB), And multiple SSB may be present in a cell.If there is multiple SSB, SSB index may be used to identify each SSB.Example Such as, if sending PSS/SSS/PBCH on 10 beam directions in a system, the PSS/ sent in the same direction SSS/PBCH can form SSB, and can be regarded as 10 SSB and be present in the system.In the disclosure, beam index can be solved It is interpreted as SSB index.
Hereinafter, by the method and instruction such as SS index and field of the generation SS for describing embodiment according to the present invention The method of the time index of index.
Before describing the present invention, " higher order bits " or " highest significant bit (MSB) " indicated in the present invention can indicate Most significant position number is placed in the left bit in the information bit arrangement of least significant.That is, being placed in most in most significant position number In the information bit arrangement that left position is set, " higher order bits " or " MSB " can be interpreted as having identical as minimum effective bit (LSB) Meaning, be to provide for determining that value indicated by information bit is the bit of the unit value of even number or odd number.
Similarly, " low step bit " or " LSB " can indicate that most significant position number is placed in the information bit row of least significant Right bit in column.In other words, most significant position number be placed in leftmost position information bit arrangement in, " low step bit " or " LSB " can be interpreted as having meaning identical with MSB.
For example, in the description of the invention provided, will have such expression " high-order N ratio of UE acquisition SFN information later Special (for example, S0, S1 and S2) and other (10-N) bits of SFN information are obtained (for example, S3 to S9), to match from PBCH content Set the SFN information of 10 bits in total ".
In this case, the arrangement of least significant is placed in the sequence most significant position number according to message bit stream In, that is, in the message bit stream for being configured to (S0 S1 S2 S3 ... S9), " high-order N-bit " mean left side N-bit (for example, S0 S1 S2) and " other (10-N) bits " mean right side (10-N) bit (for example, S3 to S9).LSB and MSB can be used in this It is expressed as follows.In the message bit stream of the sequence expression according to (S9 S8 S7 ... S1 S0), it can be pressed using the bit stream of NLSB According to N-bit (for example, S2 S1 S0) sequence indicate, and use (10-N) MSB with " other (10-N) bits are (for example, S3 To S9) " corresponding bit stream can indicate according to the sequence of (S9 S8 S7 ... S3).
1.SSB configuration
If PSS is positioned in the front of SSB when using the subcarrier spacing of 120kHz and 240kHz, UE from Problem is likely to occur in dynamic gain control (AGC) operation.It, may be due to that is, in the subcarrier spacing of 120kHz and 240kHz AGC operation is without correctly detecting NR-PSS.Therefore, it is contemplated that SSB configuration is repaired as in following two embodiment Change.
(method 1) PBCH-PSS-PBCH-SSS
(method 2) PBCH-PSS-PBCH-SSS-PBCH
That is, PBCH symbol can be positioned at the beginning of SSB, and can be used as the virtual sign for AGC operation, So that the AGC operation of UE can be executed smoothly.
The configuration of 2.SS burst set
Fig. 9 shows the SS burst set configuration when the subcarrier spacing for arranging SSB is 120kHz and 240kHz.Ginseng According to Fig. 9, when group intercarrier is away from for 120kHz and 240kHz, SS burst set according to by 4 SS happen suddenly as unit of it is emptying pre- Determine duration configuration.That is, the symbol duration for UL transmission that SSB as unit of 0.5ms, vacates 0.125ms carrys out cloth It sets.
However, the subcarrier spacing of 60kHz can be used for data transmission in the frequency range of 60GHz or more.That is, as schemed Shown in 10, in NR, the subcarrier spacing of the 60kHz for data transmission is with the 120kHz's or 240kHz for SSB transmission Subcarrier spacing reusable.
In addition, the part indicated referring to Fig.1 by frame in 0, although SSB and 60-kHz of 120-kHz subcarrier spacing carry The data-reusing of wave spacing, it is appreciated that in GP and the DL control of SSB and 60-kHz the subcarrier spacing of 120-kHz subcarrier spacing It clashes or overlaps between region processed.Due to preferably avoiding conflicting between SSB and the control area DL/UL as far as possible, So needing to modify the configuration of SS burst and SS burst set.
The invention proposes two embodiments as SS burst configuration modification to solve the above problems.
In the first embodiment, change the position of SS burst format 1 and SS burst format 2 as shown in figure 11.That is, Figure 10 Frame in SS burst format 1 and SS burst format 2 exchange, conflicted with being generated not between SSB and the control area DL/UL.It changes Yan Zhi, SS burst format 1 is located at the front of the time slot of 60-kHz subcarrier spacing, and SS burst format 2 is located at 60-kHz subcarrier The rear portion of the time slot of spacing.
Above embodiment may be summarized as follows.
1) 120KHz subcarrier spacing
First OFDM symbol of candidate's SS/PBCH block has index { 4,8,16,20,32,36,44,48 }+70*n.For The carrier frequency of 6GHz or more, n=0,2,4,6.
First OFDM symbol of candidate's SS/PBCH block has index { 2,6,18,22,30,34,46,50 }+70*n.For The carrier frequency of 6GHz or more, n=1,3,5,7.
2) 240KHz subcarrier spacing
First OFDM symbol of candidate's SS/PBCH block have index 8,12,16,20,32,36,40,44,64,68,72, 76,88,92,96,100}+140*n.For the carrier frequency of 6GHz or more, n=0,2.
First OFDM symbol of candidate's SS/PBCH block have index 4,8,12,16,36,40,44,48,60,64,68, 72,92,96,100,104}+140*n.For the carrier frequency of 6GHz or more, n=1,3.
In this second embodiment, change the configuration of SS burst set as shown in figure 12.That is, SS burst set can be configured to The beginning boundary of SS burst set is set to be directed at (that is, matching) with the beginning boundary of the time slot of 60-kHz subcarrier spacing.
Specifically, SS burst is configured by the SSB locally arranged during 1ms.Therefore, during 1ms, 120-kHz Intercarrier away from SS burst include 16 SSB, 240-kHz subcarrier spacing SS burst include 32 SSB.If be configured so that SS burst then distributes a time slot as gap between the SS burst based on 60-kHz subcarrier spacing.
Above-mentioned second embodiment is summarized as follows.
1) 120KHz subcarrier spacing
First OFDM symbol of candidate's SS/PBCH block has index { 4,8,16,20 }+28*n.For the load of 6GHz or more Wave frequency rate, n=0,1,2,3,5,6,7,8,10,11,12,13,15,16,17,18.
2) 240KHz subcarrier spacing
First OFDM symbol of candidate's SS/PBCH block has index { 8,12,16,20,32,36,40,44 }+56*n.It is right In the carrier frequency of 6GHz or more, n=0,1,2,3,5,6,7,8.
3. the instruction of the SS/PBCH block actually sent within the 5ms duration
In addition, the candidate quantity for SSB transmission can be limited according to network environment.For example, candidate quantity can basis The subcarrier spacing of SSB is set and different.In this case, the position of the SSB actually sent can be indicated to connection/free time Mode UE.Indicate that the practical transmission SS/PBCH block instruction of the position of the SSB actually sent can be for the utilization of resources (for example, rate Matching) purpose and be used for serving cell, and can for the associated measurement purpose of corresponding resource and be used for neighbor cell.
It is associated with serving cell, if UE can accurately identify that not sent SSB, UE may recognize that UE can be by not The candidate resource of the SSB of transmission receives such as other information of paging or data.For the flexibility of this resource, it is necessary to essence Really indicate the SSB actually sent in serving cell.
That is, since such as other information of paging or data can not be received in the resource for sending SSB, so UE needs to know SSB not corresponding with practical not sent SSB is candidate, with will pass through via practical not sent SSB receive other data or its Its signal carrys out enhancing resource utility rate.
Therefore, in order to accurately indicate the SSB actually sent in serving cell, the full bitmap of 4,8 or 64 bits is needed to believe Breath.In this case, bitmap can be included according to the maximum quantity for the SSB that can at most send in each frequency range to determine In bit size.For example, in order to indicate the SSB actually sent within the duration of 5ms, in the frequency of 3GHz to 6GHz 8 bits are needed in range, and 64 bits are needed in the frequency range of 6GHz or more.
The bit of SSB for actually sending in serving cell can be in remaining system information (RMSI) or other system informations (OSI) definition in.RMSI/OSI includes the configuration information for data or paging.Due to it is practical send the instruction of SS/PBCH block with The configuration association of DL resource, so it could be assumed that, RMSI/OSI includes SSB information.
In addition, for the measurement of neighbor cell, it may be necessary to which the practical transmission SS/PBCH block of neighbor cell indicates.That is, needing The time synchronization information of neighbor cell is obtained with the measurement for neighbor cell.When NR system is designed to allow between TRP Asynchronous transmission when, even if instruction neighbor cell time synchronization information, the precision of information may also be according to circumstances and different.Cause This, when indicating the temporal information of neighbor cell, even if also it is necessary to determinations between TRP under the hypothesis of execution asynchronous transmission Effective information of the unit of temporal information as UE.
Herein, the cell listed if there is many, then the instruction of full bitmap type may be such that signaling overheads excessively increases Add.Therefore, in order to reduce signaling overheads, it is contemplated that the instruction of variable compressive type.In addition, in order to reduce signaling overheads and be The instruction for the SSB that neighbor cell measurement or even serving cell are sent also is contemplated that compression type.In other words, following SSB instructions It may be used to indicate the SSB actually sent in neighbor cell and serving cell.In addition, as described above, although SS burst can table Show that according to each subcarrier include SSB beam in one time slot, only in the following embodiments, SS burst can indicate to pass through by The SSB of predetermined quantity is grouped and the SSB group of acquisition, and unrelated with time slot.
One of embodiment is described now with reference to Figure 13.Assuming that SS burst includes 8 SSB, in the frequency band of 64GHz or more In 8 SS burst in total may be present, wherein 64 SSB can be positioned.
In this case, SSB is grouped into SS burst to compress total bitmap of 64 bits.Believe instead of 64 bit maps Breath, it includes 8 bit informations of the SS burst of the SSB actually sent that instruction, which can be used,.If 8 bit map information indicate that SS is prominent #0 is sent out, then SS burst #0 may include one or more SSB actually sent.
Herein, it is contemplated that in addition indicating the additional information of the quantity of the SSB of every SS burst transmission to UE.With it is additional The SSB of the quantity of SSB indicated by information as many can locally be present in each SS burst.
Therefore, UE can by the quantity of SSB that actually sends the burst of every SS indicated by additional information be used to indicate The bitmap of SS burst including the SSB actually sent combines to estimate the SSB actually sent.
Such as, it will be assumed that the instruction example of the following table 1.
[table 1]
That is, 8 bit maps instruction SSB is included in SS burst #0, #1 and #7, and additional information refers to according to [table 1] Show that in each SS burst include 4 SSB.As a result, 4 in the front of SS burst each of #0, #1 and #7 can be estimated SSB is sent at position candidate.
Different from above-mentioned example, additional information can also be sent according to bitmap format, to can get the position for sending SSB Flexibility.
Such as, it is possible to provide it is a kind of that information related with SS burst transfer is indicated by bitmap and passes through other bit indication SS The method of the SSB sent in burst.
That is, 64 SSB are divided into 8 SS burst (that is, SSB group) in total, and by sending 8 bit maps come to UE Instruction is happened suddenly using which SS.If SS burst as shown in figure 13 definition, there are the advantage that: when SS happen suddenly and have When the timeslot multiplex of the subcarrier spacing of 60kHz, the boundary of the time slot of arrangement SS burst and the subcarrier spacing with 60kHz. Therefore, if bitmap indicates whether to happen suddenly using SS, UE be may identify whether in the frequency band of 6GHz or more for all sub- loads Wave spacing sends SSB as unit of time slot.
This example and it is previously described exemplary the difference is that, indicate additional information in bitmap format.Then, due to It should send about the message bit pattern for including 8 SSB in each SS burst, so needing 8 bits and additional information quilt It is jointly used in all SS bursts.For example, if the message bit pattern instruction about SS burst uses SS burst #0 and SS burst #1 And send the first SSB and the 5th SSB in corresponding SS burst about the instruction of the additional bitmap information of SSB, then SS happen suddenly #0 and The first SSB and the 5th SSB in SS burst #1 the two are sent, so that the sum of the SSB actually sent is 4.
In addition, some neighbor cells may be not included in cell list.It does not include that neighbours in cell list are small Area uses default form for the SSB actually sent.By using default form, it does not include neighbours in lists that UE, which can measure, Cell.In this case, default form can predefine or can be by network configuration.
In addition, when the information about the SSB actually sent in serving cell and about the SSB actually sent in neighbor cell Information collision when, UE preferably considers the information about the SSB actually sent in serving cell, thus obtain about practical hair The information of the SSB sent.
That is, UE can be examined preferentially when receiving the information about the SSB actually sent with full bitmap format and packet format Consider the information of full bitmap format to receive so that the information is used for SSB, because the information of full bitmap format has high-precision possibility Property it is high.
4. System Frame Number (SFN) and half frame boundaries
The low order N-bit of SFN information is sent in PBCH payload, and the high-order M-bit of SFN information adds in PBCH It disturbs in sequence and sends.In addition, a MSB in the high-order M-bit of SFN information can pass through PBCH DMRS, NR-SSS or SSB The variation of time/frequency location send.In addition, the information about the boundary radio field (5ms) can pass through PBCH The variation of the time/frequency location of DMRS, NR-SSS or SSB is sent.
Herein, " higher order bits " or " MSB " indicate that most significant position number is placed in the message bit stream of least significant Left bit.That is, in the message bit stream arrangement that most significant position number is placed in leftmost position, " higher order bits " or " MSB " It can be interpreted as having meaning identical with LSB, provided for determining that value is the bit of the unit value of even number or odd number.
In addition, " low step bit " or " LSB " indicates that most significant position number is placed in the message bit stream of least significant Right bit.That is, " low step bit " or " LSB " can in the message bit stream arrangement that most significant position number is placed in leftmost position It is interpreted as having meaning identical with MSB.