阅读说明：本技术 随机接入的方法和设备 (Random access method and equipment ) 是由 尤心 卢前溪 于 2019-08-06 设计创作，主要内容包括：提供了一种随机接入的方法和设备,能够减小用于指示TA的比特。该方法包括：终端设备确定第一TA；所述终端设备基于所述第一TA,发送随机接入过程中的第一条消息。(A method and apparatus for random access capable of reducing bits for indicating TA are provided. The method comprises the following steps: the terminal equipment determines a first TA; and the terminal equipment sends a first message in the random access process based on the first TA.)

A method of random access, the method comprising:

the terminal equipment determines a first time advance TA;

and the terminal equipment sends a first message in the random access process based on the first TA.

The method of claim 1, wherein the terminal device determines the first TA, comprising:

when the terminal equipment has the positioning capability, determining the first TA according to the position information of the terminal equipment and/or the second TA from the network equipment; and/or the presence of a gas in the gas,

and when the terminal equipment does not have the positioning capability, determining the second TA as the first TA.

The method according to claim 2, wherein the determining, by the terminal device, the first TA according to the location information of the terminal device and/or a second TA from a network device comprises:

the terminal equipment determines first information for representing the distance between the terminal equipment and network equipment according to the position information of the terminal equipment;

and the terminal equipment determines the first TA according to the first information and the second TA.

The method of claim 3,

the network equipment is a satellite, and the distance between the terminal equipment and the network equipment is the distance between the terminal equipment and the satellite; alternatively, the first and second electrodes may be,

the network equipment is a ground station, and the distance between the terminal equipment and the network equipment is the sum of the distance between the terminal equipment and the satellite and the distance between the satellite and the ground station.

The method of claim 3 or 4, wherein the first information comprises at least one of the following information:

round trip time RTT;

a transmission delay;

satellite ephemeris;

a distance between the terminal device and the network device;

a trajectory of the terminal device relative to a satellite.

The method according to any of claims 2-5, wherein the information of the second TA is carried in a system message.

The method according to any of claims 2-6, wherein the second TA is any one of:

TA between the terminal equipment and the transparent geosynchronous orbit GEO;

TA between the terminal device and the transparent low earth orbit LEO;

TA between the terminal equipment and the regenerated GEO;

TA between the terminal equipment and the regenerative LEO;

the sum of the TA between the terminal equipment and the transparent GEO and the TA between the transparent GEO and the ground station;

the sum of the TA between the terminal device and the transparent LEO and the TA between the transparent LEO and the ground station.

The method according to any one of claims 1 to 7, further comprising:

the terminal equipment determines Physical Random Access Channel (PRACH) resources according to whether the terminal equipment has positioning capability or not;

and the terminal equipment sends the first message by using the PRACH resource.

The method of claim 8, wherein the PRACH resources include random access channel, RACH, opportunities, and wherein the determining, by the terminal device, the PRACH resources based on whether it is location capable comprises:

when the terminal equipment has the positioning capability, determining that the RACH opportunity is a first RACH opportunity; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the RACH opportunity is a second RACH opportunity, wherein the duration of the second RACH opportunity is longer than that of the first RACH opportunity.

The method of claim 8 or 9, wherein the PRACH resources include a preamble, and wherein the determining, by the terminal device according to whether the terminal device has a positioning capability, the PRACH resources includes:

when the terminal equipment has the positioning capability, determining the lead code as a first lead code; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the lead code is a second lead code, wherein the first lead code and the second lead code respectively belong to two lead code groups respectively configured for the terminal equipment with the positioning capability and the terminal equipment without the positioning capability.

The method according to any one of claims 1 to 10, further comprising:

and the terminal equipment determines the format of a Random Access Response (RAR) message in the random access process according to whether the terminal equipment has the positioning capability or not, wherein the RAR message comprises a TA (timing advance) adjusting value.

The method according to claim 11, wherein the determining, by the terminal device, the format of a random access response, RAR, message in the random access procedure according to whether the terminal device has positioning capability includes:

when the terminal equipment has the positioning capability, determining that the format is a first RAR format; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the format is a second RAR format, wherein the maximum value of the TA adjusting value which can be transmitted by the first RAR format is smaller than the maximum value of the TA adjusting value which can be transmitted by the second RAR format.

The method according to any one of claims 1 to 10, further comprising:

and the terminal equipment receives first indication information, wherein the first indication information is used for indicating the format of the RAR message in the random access process.

The method of claim 13, wherein the first indication information is carried in a Media Access Control (MAC) subheader.

The method according to any one of claims 11 to 14, further comprising:

and the terminal equipment determines a third TA for sending a third message in the random access process according to the first TA and the TA adjusting value carried in the RAR message.

The method of claim 15, further comprising:

and the terminal equipment sends the third message, wherein the third message includes TA information, and the TA information includes the first TA, a difference value between the second TA and the first TA, or the third TA.

The method of claim 16, wherein the TA information further comprises second indication information indicating whether the first TA is determined based on a second TA.

The method according to claim 16 or 17, wherein said TA information is carried in a TA command MAC CE.

The method according to any of claims 16 to 18, wherein a third indication information is further included in the third message, and the third indication information is used to indicate whether the TA information is included in the third message.

The method of claim 19, wherein the third indication information is carried in a MAC CE sub-packet header.

The method according to any of claims 1 to 20, wherein the method is applied to a non-terrestrial communication network (NTN) system.

A method of random access, the method comprising:

determining a format of a Random Access Response (RAR) message in a random access process, wherein the RAR message comprises a Timing Advance (TA) adjustment value, and the TA adjustment value is used for a terminal device to determine a third TA for transmitting a third message in the random access process;

and sending or receiving the RAR message according to the format of the RAR message.

The method according to claim 22, wherein the determining the format of a random access response, RAR, message in a random access procedure comprises:

and determining the format of the RAR message according to whether the terminal equipment has the positioning capability.

The method according to claim 23, wherein the determining the format of the RAR message in the random access procedure according to whether the terminal device has the positioning capability includes:

when the terminal equipment has the positioning capability, determining that the format is a first RAR format; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the format is a second RAR format, wherein the maximum value of the TA adjusting value which can be transmitted by the first RAR format is smaller than the maximum value of the TA adjusting value which can be transmitted by the second RAR format.

The method of claim 23, wherein the method is performed by a network device, and wherein the method further comprises:

and the network equipment determines whether the terminal equipment has the positioning capability according to the received Physical Random Access Channel (PRACH) resource used by the first message in the random access process.

The method of claim 25, wherein the PRACH resource comprises a random access channel, RACH, opportunity, and wherein the determining, by the network device, whether the terminal device is location capable according to the PRACH resource used by the received first message in the random access procedure comprises:

when the RACH opportunity is a first RACH opportunity, the network equipment determines that the terminal equipment has positioning capability; alternatively, the first and second electrodes may be,

and when the RACH opportunity is a second RACH opportunity, the network equipment determines that the terminal equipment does not have the positioning capability, wherein the duration of the second RACH opportunity is longer than that of the first RACH opportunity.

The method of claim 25, wherein the PRACH resource comprises a preamble, and wherein the determining, by the network device, whether the terminal device has a positioning capability according to the PRACH resource used in the received first message of the random access procedure comprises:

when the lead code is a first lead code, the network equipment determines that the terminal equipment has the positioning capability; alternatively, the first and second electrodes may be,

and when the lead code is a second lead code, the network equipment determines that the terminal equipment does not have the positioning capability, wherein the first lead code and the second lead code respectively belong to two lead code groups respectively configured for the terminal equipment with the positioning capability and the terminal equipment without the positioning capability.

The method according to claim 22, wherein the method is performed by a network device, and the determining a format of a Random Access Response (RAR) message in a random access procedure according to whether a terminal device has positioning capability includes:

and the network equipment determines the format of the RAR message according to the TA adjusting value carried in the RAR message.

The method of claim 28, wherein the determining, by the network device, the format of the RAR message according to the TA adjustment value carried in the RAR message comprises:

when the TA adjustment value is less than or equal to a threshold value, the network equipment determines that the format of the RAR message is a first RAR format; alternatively, the first and second electrodes may be,

when the TA adjustment value is greater than the threshold, the network device determines that the format of the RAR message is a second RAR format, where a maximum value of the TA adjustment value that can be transmitted by the first RAR format is smaller than a maximum value of the TA adjustment value that can be transmitted by the second RAR format.

The method of claim 28 or 29, further comprising:

and the network equipment sends first indication information to the terminal equipment, wherein the first indication information is used for indicating the format of the RAR message.

The method of claim 30, wherein the first indication information is carried in a Media Access Control (MAC) subheader.

The method of any of claims 22 to 31, wherein the method is performed by a network device, the method further comprising:

and the network equipment sends a second TA to the terminal equipment, wherein the second TA is used for the terminal equipment to determine a first TA for sending the first message.

The method of claim 32, wherein the information of the second TA is carried in a system message.

The method according to any of claims 32 or 33, wherein the second TA is any one of:

TA between the terminal equipment and the transparent geosynchronous orbit GEO;

TA between the terminal device and the transparent low earth orbit LEO;

TA between the terminal equipment and the regenerated GEO;

TA between the terminal equipment and the regenerative LEO;

the sum of the TA between the terminal equipment and the transparent GEO and the TA between the transparent GEO and the ground station;

the sum of the TA between the terminal device and the transparent LEO and the TA between the transparent LEO and the ground station.

The method of any one of claims 32 to 34, further comprising:

the network device receives the third message sent by the terminal device, where the third message includes TA information, and the TA information includes the first TA, a difference between the first TA and the second TA, or a third TA used for sending the third message, and the third TA is determined by the terminal device according to the first TA and the TA adjustment value.

The method of claim 35, wherein the TA information further comprises second indication information indicating whether the first TA is determined based on the second TA.

The method according to claim 35 or 36, wherein said TA information is carried in a TA command MAC CE.

The method according to any of claims 35 to 37, wherein a third indication information is further included in the third message, and the third indication information is used to indicate whether the TA information is included in the third message.

The method of claim 38, wherein the third indication information is carried in a MAC CE sub-packet header.

The method according to any of claims 22 to 39, wherein the method is applied to a non-terrestrial communication network (NTN) system.

A terminal device, characterized in that the terminal device comprises:

a processing unit for determining a first timing advance TA;

a sending unit, configured to send a first message in a random access procedure based on the first TA.

The terminal device of claim 41, wherein the processing unit is specifically configured to:

when the terminal equipment has the positioning capability, determining the first TA according to the position information of the terminal equipment and/or the second TA from the network equipment; and/or the presence of a gas in the gas,

and when the terminal equipment does not have the positioning capability, determining the second TA as the first TA.

The terminal device of claim 42, wherein the processing unit is specifically configured to:

according to the position information of the terminal equipment, first information used for representing the distance between the terminal equipment and network equipment is determined;

and determining the first TA according to the first information and the second TA.

The terminal device of claim 43,

the network equipment is a satellite, and the distance between the terminal equipment and the network equipment is the distance between the terminal equipment and the satellite; alternatively, the first and second electrodes may be,

the network equipment is a ground station, and the distance between the terminal equipment and the network equipment is the sum of the distance between the terminal equipment and the satellite and the distance between the satellite and the ground station.

The terminal device according to claim 43 or 44, wherein the first information comprises at least one of the following information:

round trip time RTT;

a transmission delay;

satellite ephemeris;

the distance between the terminal device and the network device;

a trajectory of the terminal device relative to a satellite.

A terminal device according to any of claims 42 to 45, wherein the information of the second TA is carried in a system message.

The terminal device according to any of claims 42-46, wherein the second TA is any of:

TA between the terminal equipment and the transparent geosynchronous orbit GEO;

TA between the terminal device and the transparent low earth orbit LEO;

TA between the terminal equipment and the regenerated GEO;

TA between the terminal equipment and the regenerative LEO;

the sum of the TA between the terminal equipment and the transparent GEO and the TA between the transparent GEO and the ground station;

the sum of the TA between the terminal device and the transparent LEO and the TA between the transparent LEO and the ground station.

The terminal device according to any of claims 41 to 47,

the processing unit is further to: determining Physical Random Access Channel (PRACH) resources according to whether the positioning capability is available;

the sending unit is specifically configured to: and sending the first message by using the PRACH resource.

The terminal device of claim 48, wherein the PRACH resource comprises a Random Access Channel (RACH) opportunity, and wherein the processing unit is specifically configured to:

when the terminal equipment has the positioning capability, determining that the RACH opportunity is a first RACH opportunity; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the RACH opportunity is a second RACH opportunity, wherein the duration of the second RACH opportunity is longer than that of the first RACH opportunity.

The terminal device of claim 48 or 49, wherein the PRACH resource comprises a preamble, and wherein the processing unit is specifically configured to:

when the terminal equipment has the positioning capability, determining the lead code as a first lead code; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the lead code is a second lead code, wherein the first lead code and the second lead code respectively belong to two lead code groups respectively configured for the terminal equipment with the positioning capability and the terminal equipment without the positioning capability.

The terminal device of any of claims 41-50, wherein the processing unit is further configured to:

and determining the format of a Random Access Response (RAR) message in the random access process according to whether the terminal equipment has the positioning capability, wherein the RAR message comprises a TA (timing advance) adjustment value.

The terminal device of claim 51, wherein the processing unit is specifically configured to:

when the positioning capability is provided, determining the format as a first RAR format; alternatively, the first and second electrodes may be,

and when the positioning capability is not available, determining that the format is a second RAR format, wherein the maximum value of the TA adjustment value which can be transmitted by the first RAR format is smaller than the maximum value of the TA adjustment value which can be transmitted by the second RAR format.

The terminal device according to any of claims 41-50, wherein the terminal device further comprises:

a receiving unit, configured to receive first indication information, where the first indication information is used to indicate a format of the RAR message in the random access procedure.

The terminal device of claim 53, wherein the first indication information is carried in a Media Access Control (MAC) subheader.

The terminal device of any one of claims 51-54, wherein the processing unit is further configured to:

and determining a third TA for sending a third message in the random access process according to the first TA and the TA adjusting value carried in the RAR message.

The terminal device of claim 55, wherein the sending unit is further configured to:

and sending the third message, wherein the third message includes TA information, and the TA information includes the first TA, a difference between the second TA and the first TA, or the third TA.

The terminal device of claim 56, wherein the TA information further includes second indication information indicating whether the first TA is determined based on a second TA.

A terminal device according to claim 56 or 57, characterised in that the TA information is carried in a TA command Medium Access control element, MAC CE.

The terminal device according to any of claims 56 to 58, wherein a third indication information is further included in the third message, and the third indication information is used to indicate whether the TA information is included in the third message.

The terminal device of claim 59, wherein the third indication information is carried in a MAC CE sub-packet header.

The terminal device according to any of claims 41 to 60, wherein the terminal device is applied to a non-terrestrial communication network (NTN) system.

A communication device, characterized in that the communication device comprises:

a processing unit, configured to determine a format of a random access response RAR message in a random access process, where the RAR message includes a timing advance TA adjustment value, and the TA adjustment value is used for the terminal device to determine a third TA used for transmitting a third message in the random access process;

and the transceiving unit is used for sending or receiving the RAR message according to the format of the RAR message.

The communications device of claim 62, wherein the processing unit is specifically configured to:

and determining the format of the RAR message according to whether the terminal equipment has the positioning capability.

The communication device according to claim 63, wherein the processing unit is specifically configured to:

when the terminal equipment has the positioning capability, determining that the format is a first RAR format; alternatively, the first and second electrodes may be,

and when the terminal equipment does not have the positioning capability, determining that the format is a second RAR format, wherein the maximum value of the TA adjusting value which can be transmitted by the first RAR format is smaller than the maximum value of the TA adjusting value which can be transmitted by the second RAR format.

The communications device of claim 64, wherein the communications device is a network device, and wherein the processing unit is specifically configured to:

and determining whether the terminal equipment has the positioning capability or not according to the received Physical Random Access Channel (PRACH) resource used by the first message in the random access process.

The communications device of claim 65, wherein the PRACH resource comprises a Random Access Channel (RACH) opportunity, and wherein the processing unit is further configured to:

when the RACH opportunity is a first RACH opportunity, determining that the terminal equipment has positioning capability; alternatively, the first and second electrodes may be,

and when the RACH opportunity is a second RACH opportunity, determining that the terminal equipment does not have the positioning capability, wherein the duration of the second RACH opportunity is longer than that of the first RACH opportunity.

The communications device of claim 65, wherein the PRACH resource comprises a preamble, and wherein the processing unit is specifically configured to:

when the lead code is a first lead code, determining that the terminal equipment has positioning capability; alternatively, the first and second electrodes may be,

and when the lead code is a second lead code, determining that the terminal equipment does not have the positioning capability, wherein the first lead code and the second lead code belong to two lead code groups respectively configured for the terminal equipment with the positioning capability and the terminal equipment without the positioning capability.

The communications device of claim 62, wherein the communications device is executed by a network device, and wherein the processing unit is specifically configured to:

and determining the format of the RAR message according to the TA adjusting value carried in the RAR message.

The communications device of claim 68, wherein the processing unit is specifically configured to:

when the TA adjusting value is less than or equal to a threshold value, determining that the format of the RAR message is a first RAR format; alternatively, the first and second electrodes may be,

when the TA adjustment value is greater than the threshold, the network device determines that the format of the RAR message is a second RAR format, where a maximum value of the TA adjustment value that can be transmitted by the first RAR format is smaller than a maximum value of the TA adjustment value that can be transmitted by the second RAR format.

The communication device according to claim 68 or 69, wherein the transceiving unit is further configured to:

and sending first indication information to the terminal equipment, wherein the first indication information is used for indicating the format of the RAR message.

The communications device of claim 70, wherein the first indication information is carried in a Media Access Control (MAC) subheader.

The communication device according to any of claims 62 to 71, wherein the communication device is a network device, and wherein the transceiver unit is further configured to:

and sending a second TA to the terminal equipment, wherein the second TA is used for the terminal equipment to determine a first TA for sending the first message.

The communications device of claim 71, wherein information for the second TA is carried in a system message.

The communications device of any one of claims 72 or 73, wherein the second TA is any one of:

TA between the terminal equipment and the transparent geosynchronous orbit GEO;

TA between the terminal device and the transparent low earth orbit LEO;

TA between the terminal equipment and the regenerated GEO;

TA between the terminal equipment and the regenerative LEO;

the sum of the TA between the terminal equipment and the transparent GEO and the TA between the transparent GEO and the ground station;

the sum of the TA between the terminal device and the transparent LEO and the TA between the transparent LEO and the ground station.

The communication device according to any of claims 72 to 74, wherein the transceiving unit is further configured to:

receiving the third message sent by the terminal device, where the third message includes TA information, where the TA information includes a difference between the first TA, the second TA, and the first TA, or a third TA used for sending the third message, and the third TA is determined by the terminal device according to the first TA and the TA adjustment value.

The communications device of claim 75, wherein the TA information further includes second indication information indicating whether the first TA is determined based on the second TA.

The communications device of claim 75 or 76, wherein the TA information is carried in a TA command MAC CE.

The communications device of any one of claims 75 to 76, further comprising third indication information in the third message, wherein the third indication information is used to indicate whether the TA information is included in the third message.

The communications device of claim 78, wherein the third indication information is carried in a MAC CE subheader.

The communication device according to any of claims 62 to 79, wherein the communication device is applied to a non-terrestrial communication network (NTN) system.

A terminal device, characterized in that the terminal device comprises a processor and a memory for storing a computer program, the processor being adapted to invoke and execute the computer program stored in the memory to perform the method of any of claims 1 to 21.

A communication device, comprising a processor and a memory, the memory storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory to perform the method of any of claims 22 to 40.

An apparatus for random access, comprising a processor configured to invoke and run a computer program from a memory, such that a device in which the apparatus is installed performs the method of any one of claims 1 to 21.

An apparatus for random access, comprising a processor configured to invoke and run a computer program from a memory, such that a device in which the apparatus is installed performs the method of any of claims 22 to 40.

A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 1 to 21.

A computer-readable storage medium for storing a computer program which causes a computer to perform the method of any one of claims 23 to 40.

A computer program product comprising computer program instructions for causing a computer to perform the method of any one of claims 1 to 21.

A computer program product comprising computer program instructions to cause a computer to perform the method of any of claims 22 to 40.

A computer program, characterized in that the computer program causes a computer to perform the method of any of claims 1 to 21.

A computer program, characterized in that the computer program causes a computer to perform the method of any of claims 22 to 40.

A communication system, comprising:

the terminal device of any one of claims 41-61; and the number of the first and second groups,

the communication device of any of claims 62 to 80, being a network device.