Techniques to configure a Channel State Information (CSI) process for a coordinated set of transmit receive points
阅读说明：本技术 为发送接收点的协调集合配置信道状态信息(csi)过程的技术 (Techniques to configure a Channel State Information (CSI) process for a coordinated set of transmit receive points ) 是由 P.古普塔 J.李 李崇 于 2019-03-08 设计创作，主要内容包括：针对用于为发送接收点的协调集合配置信道状态信息(CSI)过程的技术描述了用于无线通信的方法、系统和设备。用于为发送接收点的协调集合配置信道状态信息(CSI)过程的技术可以包括接收探测参考信号(SRS)以及至少部分地基于SRS来识别TRP的第一CoMP集合。用于为发送接收点的协调集合配置信道状态信息(CSI)过程的技术还可以包括向UE发送CSI-RS,以及从UE接收CSI。用于为发送接收点的协调集合配置信道状态信息(CSI)过程的技术还可以包括至少部分地基于CSI来识别TRP的第二CoMP集合。(Methods, systems, and devices for wireless communication are described for techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmit receive points may include receiving a Sounding Reference Signal (SRS) and identifying a first CoMP set of TRPs based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmit receive points may also include transmitting CSI-RSs to a UE, and receiving CSI from the UE. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include identifying a second CoMP set of TRPs based at least in part on the CSI.)
1. A method for wireless communication, comprising:
receiving a Sounding Reference Signal (SRS);
identifying a first coordinated multipoint (CoMP) set of transmission points based at least in part on the SRS;
transmitting a channel state information reference signal (CSI-RS) to a User Equipment (UE);
receiving Channel State Information (CSI) from the UE; and
identifying a second CoMP set of transmission points based at least in part on the CSI.
2. The method of claim 1, wherein the first CoMP set of transmission points comprises a subset of a plurality of transmission points that receive the SRS.
3. The method of claim 1, wherein the first CoMP set of transmission points comprises all of a plurality of transmission points that receive the SRS.
4. The method of claim 1, further comprising:
identifying one or more CSI processes for a first CoMP set of the transmission points.
5. The method of claim 4, wherein identifying one or more CSI processes for the first CoMP set of the transmission point comprises:
identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points.
6. The method of claim 4, wherein identifying one or more CSI processes for the first CoMP set of the transmission point comprises:
a subset combination of CSI processes for a plurality of transmission points in a first CoMP set of the transmission points is identified.
7. The method of claim 1, wherein the first CoMP set of transmission points includes a greater number of transmission points than the second CoMP set of transmission points.
8. A method for wireless communication, comprising:
transmitting, by a user equipment, a Sounding Reference Signal (SRS);
receiving, by the user equipment, one or more channel state information reference signals (CSI-RSs) from a first coordinated multipoint (CoMP) set of transmission points, the first CoMP set of transmission points determined based at least in part on the SRS; and
reporting, by the user equipment, Channel State Information (CSI) to one or more transmission points.
9. The method of claim 8, wherein the one or more transmission points comprise a subset of a plurality of transmission points that receive the SRS.
10. The method of claim 8, wherein the one or more transmission points comprise all of a plurality of transmission points that receive the SRS.
11. The method of claim 8, further comprising:
receiving a CoMP transmission from a second CoMP set of transmission points, the second CoMP set of transmission points being different from the first CoMP set of transmission points.
12. An apparatus for wireless communication, comprising:
a processor;
a memory in communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
receiving a Sounding Reference Signal (SRS);
identifying a first coordinated multipoint (CoMP) set of transmission points based at least in part on the SRS;
transmitting a channel state information reference signal (CSI-RS) to a User Equipment (UE);
receiving Channel State Information (CSI) from the UE; and
identifying a second CoMP set of transmission points based at least in part on the CSI.
13. The apparatus of claim 12, wherein the first CoMP set of transmission points comprises a subset of a plurality of transmission points that receive the SRS.
14. The apparatus of claim 12, wherein the first CoMP set of transmission points comprises all of a plurality of transmission points that receive the SRS.
15. The apparatus of claim 12, wherein the instructions are further executable by the processor to cause the apparatus to:
identifying one or more CSI processes for a first CoMP set of the transmission points.
16. The apparatus of claim 15, wherein identifying one or more CSI processes for the first CoMP set for the transmission point comprises:
identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points.
17. The apparatus of claim 15, wherein identifying one or more CSI processes for the first CoMP set for the transmission point comprises:
a subset combination of CSI processes for a plurality of transmission points in a first CoMP set of the transmission points is identified.
18. The apparatus of claim 12, wherein the first CoMP set of transmission points comprises a greater number of transmission points than the second CoMP set of transmission points.
19. An apparatus for wireless communication, comprising:
a processor;
a memory in communication with the processor; and
instructions stored in the memory and executable by the processor to cause the apparatus to:
transmitting a Sounding Reference Signal (SRS);
receiving one or more channel state information reference signals (CSI-RSs) from a first coordinated multipoint (CoMP) set of transmission points, the first CoMP set of transmission points determined based at least in part on the SRS; and
channel State Information (CSI) is reported to one or more transmission points.
20. The apparatus of claim 19, wherein the one or more transmission points comprise a subset of a plurality of transmission points that receive the SRS.
21. The apparatus of claim 19, wherein the one or more transmission points comprise all of a plurality of transmission points that receive the SRS.
22. The apparatus of claim 19, wherein the instructions are further executable by the processor to cause the apparatus to:
receiving a CoMP transmission from a second CoMP set of transmission points, the second CoMP set of transmission points being different from the first CoMP set of transmission points.
Technical Field
The following relates generally to wireless communications, and more specifically to techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points.
Background
Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems that may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or discrete fourier transform spread OFDM (DFT-S-OFDM). A wireless multiple-access communication system may include multiple base stations or network access nodes, each supporting communication for multiple communication devices simultaneously, which may otherwise be referred to as User Equipment (UE).
Some wireless communication systems may use coordinated multipoint (CoMP) techniques, wherein various base stations in a coordinated set within the system may coordinate the transmission and reception of communications between the base stations and UEs in the system. The base stations may dynamically coordinate to provide joint scheduling and transmission and joint processing of received signals. In this way, the UE can be served by two or more base stations, which can help improve transmit and receive signals and increase throughput. In the event that the CoMP system may experience interference between the UE and the base station or other communication problems, another base station in the coordination set may be able to provide more reliable communication. Efficient techniques for use in CoMP systems that account for performance requirements for varying operating channel conditions can be desirable to help enhance system performance.
Disclosure of Invention
The described technology relates to improved methods, systems, devices, or apparatuses that support techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points. Various described techniques provide for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points. In some examples, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include: a Sounding Reference Signal (SRS) is received by a transmission point, and a first coordinated multipoint (CoMP) set of transmission points is identified by the transmission point and based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: channel state information reference signals (CSI-RSs) are transmitted by a transmission point to a User Equipment (UE), and Channel State Information (CSI) is received by the transmission point from the UE. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: identifying, by the transmission point, a second CoMP set for the transmission point based at least in part on the CSI.
In some aspects, the first CoMP set of transmission points may include a subset of the plurality of transmission points that received the SRS. In other aspects, the first CoMP set of transmission points may include all of the plurality of transmission points that received the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include identifying one or more CSI processes for a first CoMP set of transmitting points. In an example, identifying one or more CSI processes for the first CoMP set of transmission points can include identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In another example, identifying one or more CSI processes for the first CoMP set of transmission points may include identifying a subset combination of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In an example, the first CoMP set of transmission points can include a greater number of transmission points than the second CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmit receive points may include transmitting, by a user equipment, a Sounding Reference Signal (SRS). Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving, by a user equipment, one or more channel state information reference signals (CSI-RS) from a first coordinated multipoint (CoMP) set of transmitting points. For example, a first CoMP set of transmission points can be determined based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include reporting, by a user equipment, Channel State Information (CSI) to one or more transmitting points.
In some aspects, the one or more transmission points may comprise a subset of the plurality of transmission points that received the SRS. In another example, the one or more transmission points can include all of the plurality of transmission points that received the SRS. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving CoMP transmissions from a second CoMP set of transmitting points. For example, the second CoMP set of transmission points is different from the first CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include: the apparatus generally includes means for receiving a Sounding Reference Signal (SRS), and means for identifying a first coordinated multipoint (CoMP) set of transmission points based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: the apparatus generally includes means for transmitting a channel state information reference signal (CSI-RS) to a User Equipment (UE), and means for receiving Channel State Information (CSI) from the UE. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include means for identifying a second CoMP set of transmitting points based at least in part on the CSI.
In some aspects, the first CoMP set of transmission points may include a subset of the plurality of transmission points that received the SRS. In another aspect, the first CoMP set of transmission points may include all of the plurality of transmission points that received the SRS. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include means for identifying one or more CSI processes for a first CoMP set of transmitting points. In one example, the means for identifying one or more CSI processes for the first CoMP set of transmission points can include means for identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In another example, the means for identifying one or more CSI processes for the first CoMP set of transmission points can include means for identifying a subset combination of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In an aspect, the first CoMP set of transmission points may include a greater number of transmission points than the second CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include means for transmitting a Sounding Reference Signal (SRS). Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: means for receiving one or more channel state information reference signals (CSI-RSs) from a first coordinated multipoint (CoMP) set of transmission points. For example, a first CoMP set of transmission points can be determined based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include means for reporting Channel State Information (CSI) to one or more transmitting points.
In some aspects, the one or more transmission points may comprise a subset of the plurality of transmission points that received the SRS. In another aspect, the one or more transmission points may include all of the plurality of transmission points that received the SRS. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include means for receiving a CoMP transmission from a second CoMP set of transmitting points. For example, the second CoMP set of transmission points may be different from the first CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include: a processor; a memory in communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receiving a Sounding Reference Signal (SRS); and identifying a first coordinated multipoint (CoMP) set of transmission points based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include: the method includes transmitting a channel state information reference signal (CSI-RS) to a User Equipment (UE), and receiving Channel State Information (CSI) from the UE. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include identifying a second CoMP set of transmitting points based at least in part on CSI.
In some aspects, the first CoMP set of transmission points may include a subset of the plurality of transmission points that received the SRS. In another aspect, the first CoMP set of transmission points may include all of the plurality of transmission points that received the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: one or more CSI processes for a first CoMP set of transmission points are identified. In an aspect, identifying one or more CSI processes for the first CoMP set of transmission points may include identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In another aspect, identifying one or more CSI processes for the first CoMP set of transmission points may include identifying a subset combination of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. For example, the first CoMP set of transmission points may include a greater number of transmission points than the second CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may include: a processor; a memory in communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: a Sounding Reference Signal (SRS) is transmitted. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving one or more channel state information reference signals (CSI-RS) from a first coordinated multipoint (CoMP) set of transmitting points. For example, a first CoMP set of transmission points can be determined based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include reporting Channel State Information (CSI) to one or more transmitting points.
In some aspects, the one or more transmission points may comprise a subset of the plurality of transmission points that received the SRS. In another aspect, the one or more transmission points may include all of the plurality of transmission points that received the SRS. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving CoMP transmissions from a second CoMP set of transmitting points. For example, the second CoMP set of transmission points may be different from the first CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmit receive points may include a non-transitory computer-readable medium storing code for wireless communication, the code may include instructions executable by a processor to: the method includes receiving a Sounding Reference Signal (SRS), and identifying a first coordinated multipoint (CoMP) set of transmission points based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may further include: the method includes transmitting a channel state information reference signal (CSI-RS) to a User Equipment (UE), and receiving Channel State Information (CSI) from the UE. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include identifying a second CoMP set of transmitting points based at least in part on CSI.
In some aspects, the first CoMP set of transmission points may include a subset of the plurality of transmission points that received the SRS. In another aspect, the first CoMP set of transmission points may include all of the plurality of transmission points that received the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points identify one or more CSI processes for a first CoMP set of transmitting points. In an example, identifying the one or more CSI processes for the first CoMP set of transmission points can include identifying all combinations of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In another example, identifying one or more CSI processes for the first CoMP set of transmission points may include identifying a subset combination of CSI processes for a plurality of transmission points in the first CoMP set of transmission points. In an aspect, the first CoMP set of transmission points may include a greater number of transmission points than the second CoMP set of transmission points.
In some aspects, techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmit receive points may include a non-transitory computer-readable medium storing code for wireless communication, the code may include instructions executable by a processor to: a Sounding Reference Signal (SRS) is transmitted. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving one or more channel state information reference signals (CSI-RS) from a first coordinated multipoint (CoMP) set of transmitting points. For example, a first CoMP set of transmission points can be determined based at least in part on the SRS. Techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include reporting Channel State Information (CSI) to one or more transmitting points.
In some aspects, the one or more transmission points may comprise a subset of the plurality of transmission points that received the SRS. In another aspect, the one or more transmission points may include all of the plurality of transmission points that received the SRS. The techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points may also include receiving CoMP transmissions from a second CoMP set of transmitting points. For example, the second CoMP set of transmission points may be different from the first CoMP set of transmission points.
Some examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, means, or instructions for identifying an SPS configuration for two or more other UEs that may be associated with one or more different TRPs in a set of TRPs, and wherein configuring the second set of NOMA uplink resources may be based, at least in part, on the SPS configuration.
Drawings
Fig. 1 illustrates an example of a wireless communication system that supports techniques for configuring a CSI process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure.
Fig. 2 illustrates an example of a portion of a wireless communication system that supports techniques for configuring a CSI process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure.
Fig. 3 illustrates an example of a coordination set that supports techniques for configuring a Channel State Information (CSI) process for a coordination set of transmitting receiving points, in accordance with aspects of the present disclosure.
Fig. 4 and 5 illustrate block diagrams of devices that support techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure.
Fig. 6 and 7 show block diagrams of devices that support techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure.
Fig. 8 and 9 illustrate methods for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure.
Detailed Description
In a coordinated wireless communication system, multiple Transmit Receive Points (TRPs) in a set may support communication with a User Equipment (UE). One or more TRPs in the set may coordinate scheduling and communication with each other (e.g., communication directly via a backhaul link or through a coordinating entity such as a base station or core network node). Various described techniques provided for multiple TRPs in a set may configure a Channel State Information (CSI) process for communication with a UE. In some cases, a user equipment may broadcast a Sounding Reference Signal (SRS) to one or more neighboring TRPs. Each of the adjacent TRPs receiving the SRS may access and determine a channel state between the TRP and the user equipment. The neighboring TRP may transmit the channel state information obtained from the SRS to a coordination entity (e.g., a master node (grandmaster), a multi-cell/Multicast Coordination Entity (MCE), a node within the core network, etc.). The coordination entity may determine a first CoMP set of TRPs for communicating with the user equipment. In another example, adjacent TRPs may communicate channel state information derived from the SRS to each other. The neighboring TRPs may identify a first CoMP set of TRPs for communicating with the user equipment. In an example, the CoMP set of TRPs may include a subset of neighboring TRPs that received SRS from the user equipment.
In some cases, due to changes in the environment (e.g., fast shadowing), more detailed channel state information may be needed in order to maintain a reliable CoMP set of TRPs. For example, each TRP in the first CoMP set may transmit a channel state information reference signal (CSI-RS) to the user equipment. The user equipment may measure channel conditions using the CSI-RS and report the channel conditions (e.g., Channel Quality Indicator (CQI)) to each TRP in the first CoMP set. Each TRP in the first CoMP set may determine a CSI interference measurement (CSI-IM) based at least in part on a channel condition report provided by the user equipment. Each TRP in the first CoMP set may provide/report the CSI-IM to the coordinating entity. The coordination entity may determine a second CoMP set of TRPs for communicating with the user equipment based at least in part on the CSI-IM provided by each TRP in the first CoMP set.
In some cases, such techniques for configuring CSI processes may be used in wireless communication systems implementing ultra-reliable low-delay communication (URLLC), which may allow for increased data rates and higher throughput for wireless communication. Some of these systems may be between 1 and 10 milliseconds (ms)Providing high reliability in cycle time (e.g. 10)-6Error rate), such as in an internet of things (IoT) system. For example, UEs within some industrial IoT contexts may communicate periodic traffic within a deterministic synchronization cycle. These UEs may send and receive small payloads, which may allow a large number of UEs to operate within the IoT system. Backhaul links, such as those between different TRPs in an IoT system, may be fast, reliable, and deterministic (e.g., Time Sensitive Network (TSN) and/or Integrated Access and Backhaul (IAB)), allowing communication between TRPs with high throughput and data rates.
However, due to the nature of the operating environment, UEs operating in IoT systems may also be limited to short communication ranges and may face challenging propagation scenarios. For example, in some industrial IoT contexts, there may be fast moving components, machines, or devices within a particular operating environment, which may result in fast shadowing and interference. Furthermore, the UE may experience interference from remote transmissions, which may change rapidly due to reflections within the industrial environment. In addition, the mobility of the UE may be limited in speed, range, and randomness. Due to the difficult environment of such industrial IOT systems, some systems may specify that spatial diversity may be used for URLLC communications. However, spatial reuse may require coordinated communication between various TRPs (e.g., in a coordinated multipoint (CoMP) system) to ensure that spatial reuse efforts do not inadvertently increase inter-cell interference (ICI).
The described technology relates to a coordinated set of transmit receive points in a coordinated multipoint (CoMP) system. By utilizing communication links (e.g., backhaul communication links) in the IoT system, one or more UEs in the CoMP system can be within a coverage area supported by a coordinated set of TRPs. Some sets of TRPs may overlap and in this case different frequencies may be utilized to help mitigate interference between different sets. Each coordinated set of TRPs may support communication for a UE via multiple TRPs and/or a single TRP may be part of multiple sets. To support communication on different sets, a TRP may be configured to communicate using resources specified for each coordinated set of TRPs. In some examples, a TRP may be an independent base station, or a group of TRPs may be controlled by a single base station or a coordinating entity (e.g., a master node).
Aspects of the present disclosure are first described in the context of a wireless communication system. Aspects of the present disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flow diagrams related to techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points.
Fig. 1 illustrates an example of a wireless communication system 100 for configuring a CSI process for a coordinated set of transmit receive points in accordance with various aspects of the disclosure. The wireless communication system 100 may include
The
Each
The geographic coverage area 110 of a
The term "cell" refers to a logical communication entity for communicating with the base station 105 (e.g., over a carrier) and may be associated with an identifier (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) for distinguishing neighboring cells operating via the same or different carrier. In some examples, one carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine Type Communication (MTC), narrowband internet of things (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of geographic coverage area 110 over which a logical entity operates.
The
Some
Some
In some cases, the UE115 may also be able to communicate directly with other UEs 115 (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UEs in the group of
The
The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an Evolved Packet Core (EPC) that may include at least one Mobility Management Entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW). The MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for
At least some of the network devices, such as
The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300MHz to 300 GHz. Generally, the region from 300MHz to 3GHz is referred to as the Ultra High Frequency (UHF) region or the decimeter band because the wavelength distance is from about 1 decimeter to 1 meter long. Building and environmental features may block or redirect UHF waves. However, the waves may penetrate the structure sufficiently for serving
The wireless communication system 100 may also operate in an ultra high frequency (SHF) region, also referred to as a centimeter frequency band, using a frequency band of 3GHz to 30 GHz. The SHF area includes frequency bands such as the 5GHz industrial, scientific, and medical (ISM) bands, which can be used opportunistically by devices that can tolerate interference from other users.
The wireless communication system 100 may also operate in the Extremely High Frequency (EHF) region of the spectrum, also referred to as the millimeter band (mm hz), e.g., from 30GHz to 300 GHz. In some examples, the wireless communication system 100 may support millimeter wave (mmW) communication between the
In some cases, the wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band, such as the 5GHz ISM band. When operating in the unlicensed radio frequency spectrum band, wireless devices such as the
Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting or receiving device (e.g.,
In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. In some cases, the Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer may perform priority processing and multiplex logical channels into transport channels. The MAC layer may also provide retransmissions at the MAC layer using hybrid automatic repeat request (HARQ) to improve link efficiency. In the control plane, a Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of RRC connections between the UE115 and the
In some cases, the UE115 and the
The term "carrier" refers to a set of radio spectrum resources having a defined physical layer structure for supporting communications over the communication link 125. For example, the carrier of the communication link 125 may comprise a portion of a radio frequency spectrum band operating according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. The carriers may be associated with predefined frequency channels (e.g., E-UTRA absolute radio frequency channel number (EARFCN)) and may be located according to a channel grid for discovery by
The organization of the carriers may be different for different radio access technologies (e.g., LTE-A, LTE-A Pro, NR, etc.). For example, communications over carriers may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding of the user data. The carriers may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates operation of the carriers. In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers.
The physical channels may be multiplexed on the carriers according to various techniques. The physical control channels and physical data channels may be multiplexed on the downlink carrier using, for example, Time Division Multiplexing (TDM) techniques, Frequency Division Multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. In some examples, the control information sent in the physical control channel may be distributed in a cascaded manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).
The carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or "system bandwidth" of the wireless communication system 100. For example, the carrier bandwidth may be one of a plurality of predetermined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80MHz) of the carrier of the particular radio access technology. In some examples, each served UE115 may be configured to operate over part or all of the carrier bandwidth. In other examples, some
In some examples, the wireless communication system 100 may use CoMP techniques for
In some cases, wireless communication system 100 may be a CoMP system employing Joint Processing (JP). In a JP-CoMP system, data may be available to a UE115 at more than one TRP105 for the same time-frequency resource. The JP-CoMP system can be classified into a Joint Transmission (JT) system and a Dynamic Point Selection (DPS) system. In a JT-CoMP system,
The CoMP-DPS system may allow the UE115 to be dynamically scheduled by the TRP105 with sufficient (e.g., highest) channel quality conditions for communicating with the
In a CoMP-DPS communication system, the communication between the TRP105 and the UE115 may experience shadowing. Shadowing can occur when the received power of a signal fluctuates due to objects blocking the propagation path between TRP105 and
In some cases, reliability of communications between the set of
Fig. 2 illustrates an example of a portion of a wireless communication system 200 that supports a feedback transmission technique in a coordinated set of transmission receiving points in accordance with various aspects of the disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100. In the wireless communication system 200, a coordination entity 205 (e.g., a master node, a multi-cell/Multicast Coordination Entity (MCE), a node within the core network 130, etc.) may determine a plurality of coordination sets 225 for communicating with a plurality of
In the example of fig. 2, each coordination set 225 may include a plurality of
In some examples, TRP105 may communicate with a management system (e.g., coordination entity 205) via link 210, which may configure a different coordination set 225. The management system may include, for example, an industrial PC that may provide controller programming, software and security management of the wireless communication system 200, long term Key Performance Indicator (KPI) monitoring, and other functions for the
In some cases, a TRP105 may include a Programmable Logic Controller (PLC) that may issue a series of commands (e.g., motion commands for a piece of equipment), receive sensor inputs (e.g., the position of a robotic arm of a piece of equipment), and coordinate with other PLCs. In such a case, wireless communication between TRP105 and UE115 may need to provide near real-time information and URLLC communication techniques may be used. In such a case, communication between the TRPs 105 may have somewhat relaxed delay requirements, while communication between the TRP105 and the
In some cases, TRP105, which is a member of a given coordination set 225, may change. For example, channel conditions of UE115 may change over time due to location of UE115, velocity or movement of UE115, interference or signal quality variations between UE115 and one or
In some cases, the coordinating
As noted above, in some cases, communication between the TRP105 and the UE115 may experience a fast shadowing or fast fading within the coordination set 225. When communications between TRP105 and UE115 experience frequent and substantial shadowing changes, rapid shadowing may occur. For example, in some cases, the UE115 may be in an industrial environment and experience reflections (e.g., due to obstructions from some moving physical object such as a robotic arm).
In a fast shadowing or fading environment, a reliable CoMP set of
One or more
In some aspects, the first CoMP set of
Fig. 3 illustrates an example of a
A UE115-e may communicate with one or
To efficiently obtain CSI from a large number of
In an aspect, the first CoMP set may include all TRPs 105 (e.g., TRPs 105-e, 105-f, 105-g, and 105-h) that received SRS from UE 115-e. Furthermore, all TRPs 105 (e.g., TRPs 105-e, 105-f, 105-g, and 105-h) may have a measured uplink channel quality of communication link 325-a, communication link 325-b, communication link 325-c, and/or communication link 325-d above a channel quality threshold. In some aspects, the first CoMP set may include a subset of TRPs 105 (e.g., TRPs 105-e, 105-f, 105-g, and 105-h). In an example, TRPs 105-e and 105-f may have a measured uplink channel quality above a channel quality threshold, while TRPs 105-g and 105-h may have a measured uplink channel quality below a channel quality threshold. Thus, the coordinating
In some aspects, TRP105 (e.g., TRP105-e, 105-f, 105-g, and 105-h) may provide the measured uplink channel qualities of communication link 325-a, communication link 325-b, communication link 325-c, and/or communication link 325-d to each other. The TRPs 105 (e.g., TRPs 105-e, 105-f, 105-g, and 105-h) may negotiate among each other to determine a first CoMP set of
In some aspects, although the uplink channel quality may be determined, due to changes in the environment (e.g., fast shadowing), more detailed channel state information may be needed in order to maintain a reliable CoMP set of TRPs. Multiple combinations of CSI processes (e.g., corresponding to different Tx states of the TRP) for the first CoMP set of the TRP105 may be identified. The number of combinations of CSI processes (e.g., corresponding to different Tx states of the TRP) may be based at least in part on the number of
In some aspects, subset combinations of CSI processes for a first CoMP set of
For example, the CSI process may include each TRP105 in the first CoMP set may transmit a channel state information reference signal (CSI-RS) to UE 115-e. The UE115-e may measure the channel condition using the CSI-RS and report the channel condition (e.g., a Channel Quality Indicator (CQI)) to each TRP in the first CoMP set. Each TRP105 in the first CoMP set may determine a CSI interference measurement (CSI-IM) based at least in part on a channel condition report provided by UE 115-e. Each TRP105 in the first CoMP set may provide/report CSI-IM to coordinating entity 205-a. The coordinating entity 205-a may determine a second CoMP set of
Fig. 4 illustrates a block diagram 400 of a wireless device 405 that supports techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points, in accordance with aspects of the present disclosure. The wireless device 405 may be an example of aspects of the UE115 as described with reference to fig. 1-3. The wireless device 405 may include a receiver 410, a UE communication manager 415, and a transmitter 420. The wireless device 405 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).
Receiver 410 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to feedback transmission techniques in a coordinated set of transmitting receiving points). The information may be communicated to other components of the device. The receiver 410 may be an example of aspects of the
The UE communications manager 415 may be an example of aspects of the
SRS manager 425 may broadcast one or more Sounding Reference Signals (SRS) to one or more
CSI process manager 430 may identify all combinations of CSI processes of the first CoMP set of
CSI feedback sending component 435 can report/send NCSI to one or
Transmitter 420 may transmit signals generated by other components of wireless device 400. In some examples, the transmitter 420 may be co-located (collocated) with the receiver 410 in the transceiver module. For example, the transmitter 420 may be an example of aspects of the
Fig. 5 illustrates a diagram of a
The
In some cases,
The I/
Fig. 6 illustrates a block diagram 600 of a
The base
CoMP set
The
Fig. 7 illustrates a diagram of a system 700 that includes a wireless device 705 that supports techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting reception points, in accordance with aspects of the disclosure. The wireless device 705 may be an example of the
Processor 720 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combinations thereof). In some cases, processor 720 may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into processor 720. Processor 720 may be configured to execute computer readable instructions stored in the memory to perform various functions (e.g., functions or tasks supporting techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points).
The memory 725 may include RAM and ROM. The memory 725 may store computer-readable computer-executable software 730 comprising instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 725 may contain, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.
Software 730 may include code for implementing aspects of the disclosure, including code for supporting techniques for configuring a Channel State Information (CSI) process for a coordinated set of transmitting receiving points. The software 730 may be stored in a non-transitory computer readable medium such as a system memory or other memory. In some cases, the software 730 may not be directly executable by the processor, but may cause the computer (e.g., when compiled and run) to perform functions described herein.
The transceiver 735 may communicate bi-directionally via one or more antennas, wired or wireless links as described above. For example, the transceiver 735 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 735 may also include a modem to modulate packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
In some cases, the wireless device 705 may include a single antenna 740. However, in some cases, a device may have more than one antenna 740 capable of transmitting or receiving multiple wireless transmissions simultaneously.
The network communication manager 745 may manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 745 may manage the communication of data communications for client devices such as one or
The inter-station communication manager 750 may manage communications with
Fig. 8 shows a flow diagram illustrating a
At 805, the UE115 may transmit or broadcast a Sounding Reference Signal (SRS) to one or more
At 810, the UE115 may receive one or more channel state information reference signals (CSI-RS) from a first coordinated multipoint (CoMP) set of
At 815, the UE115 may send or report Channel State Information (CSI) to one or
Fig. 9 shows a flow diagram illustrating a
At 905, the
At 910, the
At 915, the
At 920, the
At 925, the
It should be noted that the above described methods describe possible implementations, operations and steps may be rearranged or otherwise modified, and other implementations are possible. Further, aspects from two or more of the methods may be combined.
The techniques described herein may be used for various wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and others. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. The IS-2000 version may be commonly referred to as CDMA 20001X, 1X, etc. IS-856(TIA-856) IS commonly referred to as CDMA 20001 xEV-DO, High Rate Packet Data (HRPD), etc. UTRA includes wideband CDMA (wcdma) and other variants of CDMA. TDMA systems may implement radio technologies such as global system for mobile communications (GSM).
The OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE 802.16(WiMAX), IEEE 802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A and LTE-A Pro are releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization named "third Generation partnership project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies. Although aspects of the LTE, LTE-A, LTE-A Pro or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro or NR terminology may be used in many of the descriptions, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro or NR applications.
A macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by
One or more of the wireless communication systems 100 described herein may support synchronous or asynchronous operation. For synchronous operation, the
The information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
The various illustrative blocks and modules described in connection with the disclosure herein may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic Device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. Features that perform a function may also be physically located at various locations, including being distributed such that portions of a function are performed at different physical locations.
Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory, Compact Disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
As used herein, including in the claims, "or" used in a list of items (e.g., a list of items beginning with a phrase such as at least one of "or one or more of". multidot.... such that, for example, a list of at least one of A, B or C refers to a or B or C or AB or AC or BC or ABC (i.e., a and B and C)). Further, as used herein, the phrase "based on" should not be construed as a reference to a closed condition set. For example, an exemplary step described as "based on condition a" may be based on both condition a and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on".
In the drawings, similar components or features may have the same reference numerals. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If only the first reference numeral is used in the specification, the description is applicable to any one of the similar components having the same first reference numeral regardless of the second reference numeral or other subsequent reference numerals.
The example configurations described herein are described in conjunction with the descriptions set forth in the figures and are not intended to represent all examples that may be implemented or within the scope of the claims. The term "exemplary" is used herein to mean "serving as an example, instance, or illustration," rather than "preferred" or "superior to other examples. The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, the techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.
The description herein is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
- 上一篇：一种医用注射器针头装配设备
- 下一篇：用于信号传输的方法和设备