WO2019037679A1

WO2019037679A1 - Random access resources configuration and monitoring methods, network device and terminal

Info

Publication number: WO2019037679A1
Application number: PCT/CN2018/101294
Authority: WO
Inventors: 吴丹; 童辉; 王飞
Original assignee: 中国移动通信有限公司研究院; 中国移动通信集团有限公司
Priority date: 2017-08-24
Filing date: 2018-08-20
Publication date: 2019-02-28
Also published as: CN109429345A

Abstract

The disclosure provides random access resources configuration and monitoring methods, a network device and a terminal. The configuration method comprises: generating configuration information of an association relationship between N synchronization signal blocks and random access resources, the association relationship being that among N random access resources corresponding to the N synchronization signal blocks, at least two random access resources have the same time domain position, where N is a positive integer equal to or greater than 2; and sending the configuration information to a terminal.

Description

Configuration, monitoring method, network device and terminal of random access resources

Cross-reference to related applications

Priority is claimed on Japanese Patent Application No. 201710770116.7, filed on Aug.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a configuration, a monitoring method, a network device, and a terminal of a random access resource.

Background technique

In the NR standardization discussion, it is determined that an Association (association) is performed between a synchronization block (SS Block) and a RACH (random access) resource for determining that a base station transmits a transmission beam of Msg 2. In this association, it is necessary to consider different factors and try to set the same parameter group to indicate the association. These factors include: beamforming form at the base station, beam consistency at the base station, number of synchronization signal blocks, PRACH. (Physical random access) number of resources, time density of PRACH resources, and the like.

One of the simplest ways of association is as shown in FIG. 1. One SS block corresponds to one RACH resource, where one RACH resource refers to a preamble format configured in the RACH configuration information of the base station RMSI (preamble format) ) Time-frequency resources required.

In this way, the RACH resource takes too long. For example, in the case of a high frequency band and L=64, the base station can transmit up to 64 SS blocks in a synchronization signal block transmission period, so that in order to communicate with each SS For block-to-one correspondence, 64 time-domain PRACH resources are required. For example, the high-frequency PRACH format is at least one symbol, and a total of 64 symbols are required. Even if all uplink slots are reserved, at least 5 slots resources are required (14 symbols per slot); if some more practical uplink and downlink and periodic configurations are considered, 64 slots or even more may be needed. . When the terminal needs to perform Msg1 retransmission, the new available resources are separated by a long time, which may cause the terminal RACH delay to be too large.

Summary of the invention

The present disclosure provides a configuration, a monitoring method, a network device, and a terminal for a random access resource. In the 5G system, the RACH resources corresponding to the synchronization signal blocks transmitted by multiple different digital beams are configured on the same time domain resource, which can reduce the terminal access delay. The scheme also considers the analog-to-digital mixing and the whole. The digital beamforming architecture supports a more flexible and uniform mapping.

In order to solve the above technical problem, an embodiment of the present disclosure provides the following solution:

A method for configuring a random access resource includes:

Generating configuration information of a synchronization signal block and a random access resource, the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: at least N random access resources corresponding to the N synchronization signal blocks, at least The time domain locations of the two random access resources are the same; wherein N is a positive integer greater than or equal to 2;

Sending the configuration information to the terminal.

The frequency domain locations of the N random access resources are identical, partially the same, or different.

The time domain location of the N random access resources includes: an odd time slot in a system frame, an even time slot in a system frame, or multiple time slots in a system frame; or

The time domain locations of the N random access resources include: positions of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and odd times of even subframes The position of the M symbols in the slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1.

The M symbols include: M symbols that are arranged from the last symbol of the time slot to the start symbol direction of the time slot.

The N1 random access resources are the same as the time domain resources of the N1+L random access resources, where N1 is the N random access resources. Any one of the last random access resources, L is the number of consecutive random access resources after the N1 random access resources.

The frequency domain resource location of the N1+L random access resources and the frequency domain resource location of the N1st random access resource are separated by a fixed value.

The configuration information further includes: configuration information of a preamble sequence format that can be used by the terminal in the random access process, where the configuration information of the preamble sequence format includes the number of symbols available when the terminal sends the preamble sequence and/or Or the number of time slots.

An embodiment of the present disclosure further provides a network device, including:

a processor, configured to generate configuration information of a synchronization signal block and a random access resource association, where the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: N random connections corresponding to N synchronization signal blocks In the inbound resource, at least two random access resources have the same time domain location; wherein N is a positive integer greater than or equal to 2;

And a transceiver, configured to send the configuration information to the terminal.

The time domain locations of the N random access resources include: locations of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and even subframes The position of the M symbols in the odd time slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1.

The N1 random access resources are the same as the time domain resources of the N1+L random access resources, where N1 is the N random access resources. Any one of the last random access resources, L is the number of consecutively arranged symbols after the N1th random access resource.

An embodiment of the present disclosure further provides a method for monitoring a random access resource, including:

Receiving, by the network device, configuration information of a synchronization signal block and a random access resource, the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: N random accesses corresponding to N synchronization signal blocks In the resource, at least two random access resources have the same time domain location; wherein N is a positive integer greater than or equal to 2;

The downlink information is monitored on the random access resource indicated by the configuration information.

The frequency domain resource location of the random access resource corresponding to the N1+L is a fixed value from the frequency domain resource location of the random access resource corresponding to the N1 random access resource.

An embodiment of the present disclosure further provides a terminal, including:

The transceiver is configured to receive configuration information of a synchronization signal block and a random access resource association relationship sent by the network device, where the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: N synchronization signal blocks corresponding to Among the N random access resources, the time domain locations of the at least two random access resources are the same; where N is a positive integer greater than or equal to 2; and the downlink information is monitored on the random access resource indicated by the configuration information.

The frequency domain resource location of the N1+L random access resources and the frequency domain resource location of the random access resource corresponding to the N1 random access resource are separated by a fixed value.

Embodiments of the present disclosure also provide a communication device comprising: a processor, a memory storing a computer program, and when the computer program is executed by the processor, performing the method as described above.

Embodiments of the present disclosure provide a computer readable storage medium comprising instructions that, when executed by a computer, cause a computer to perform the method as described above.

The above aspects of the present disclosure include at least the following beneficial effects:

In the above solution of the present disclosure, the configuration information of the N synchronization signal blocks and the random access resources associated with the different digital beam transmissions is configured for the terminal, and the association relationship is: N random accesses corresponding to the N synchronization signal blocks. In the resource, the time domain location of the at least two random access resources is the same; where N is a positive integer greater than or equal to 2; the configuration information is sent to the terminal; thereby reducing the access delay of the terminal random access procedure.

DRAWINGS

1 is a schematic diagram of a one-to-one correspondence between a synchronization signal block and a RACH resource of the related art;

2 is a flowchart of a method for configuring a random access resource according to the present disclosure;

FIG. 3 is a schematic diagram of a correspondence between a synchronization signal block and a RACH resource according to the present disclosure.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

The association between the synchronization signal block and the RACH resource in the time domain is applicable under the analog beamforming architecture, but the time domain resource is occupied, which affects the terminal access delay.

In order to reduce the terminal access delay and reduce the time domain PRACH resource overhead, and considering the analog-to-digital hybrid and all-digital beamforming architecture, the base station needs a configuration scheme that supports a more flexible and unified synchronization signal block and RACH resource association relationship.

As shown in FIG. 2, an embodiment of the present disclosure provides a method for configuring a random access resource, including:

Step 21: Generate configuration information of a synchronization signal block and a random access resource association, where the synchronization signal block includes: N synchronization signal blocks, and the N synchronization signal blocks are transmitted by different digital beams, and the association relationship is: Among the N random access resources corresponding to the N synchronization signal blocks, at least 2 random access resources have the same time domain position; wherein N is a positive integer greater than or equal to 2;

Step 22: Send the configuration information to the terminal.

In an embodiment of the present disclosure, the frequency domain locations of the N random access resources are identical, partially the same, or different.

In an embodiment of the present disclosure, the time domain locations of the N random access resources include: odd time slots within a system frame, even time slots within a system frame, or multiple time slots within a system frame.

In an embodiment of the present disclosure, the time domain location of the N random access resources may also include: locations of M symbols in odd slots of odd subframes, M symbols in even slots of odd subframes The position, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe; wherein M is a positive integer greater than or equal to 1. Preferably, the time domain location of the N random access resources may include: a location of M symbols in an odd slot of an odd subframe, and an M in an even slot of an odd subframe in a transmission period of the synchronization signal The position of the symbols, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe.

In an embodiment of the present disclosure, the M symbols include: M symbols starting from a last symbol of the time slot to a start symbol direction of the time slot.

In the embodiment of the present disclosure, the N1 random access resources are the same as the time domain resources of the N1+L random access resources, where N1 is N random. Any one of the random access resources except the last one of the access resources, L is the step size.

In an embodiment of the present disclosure, the frequency domain resource location of the N1+L random access resources and the frequency domain resource location of the N1st random access resource are separated by a fixed value.

In the embodiment of the present disclosure, the configuration information further includes: configuration information of a preamble sequence format that the terminal can use in the random access process, where the configuration information of the preamble sequence format includes when the terminal sends the preamble sequence. Number of symbols and/or number of slots.

Under the analog-digital hybrid beamforming architecture, the base station transmitting different synchronization signal blocks can use different analog beams or different digital beams under the same analog beam.

Considering that the digital beam portion can be obtained by terminal baseband processing, there is no need to distinguish between the received resources, and therefore, as shown in FIG. The RACH resources corresponding to the part of the synchronization signal block may be configured on resources of the same symbol.

Embodiment 1: RACH configuration format

Preamble sequence format field: configured to the Preamble format that the terminal can use. The terminal can obtain the corresponding symbol number n according to this, as shown in the following table:

The synchronization signal block and the RACH association configuration field: at least includes the following time domain location configuration field

SS block 1-4, SS block 1 and SS block 2 in the table may be synchronous signal blocks of different digital beam transmissions of the same analog beam, SS block 3 and SS block 4 may be different digital beam transmissions of the same analog beam Synchronization signal block; therefore, the time domain resources of the RACH resources of SS block 1 and SS block 2 are the same, all are odd time slots of odd subframes, and the symbols are from the last symbol of the time slot, starting from n symbols. To the last symbol, this is for illustrative purposes only and is not limited to the situations listed in the table.

Embodiment 2: RACH configuration format

Preamble sequence format field: A preamble sequence format that can be used for the terminal, and the terminal can obtain the corresponding symbol number n accordingly.

The SS block number field corresponding to the frequency division multiplexing RACH resource on the same symbol: m;

For example, m=2, indicating that starting from SSblock 1, there are two PR blocks corresponding to the same PRACH time domain resource locations, namely SS block1 and SSblock 2;

Starting from SS block 3, there are two PR blocks corresponding to the same PRACH time domain resource locations, namely SS block3 and SSblock 4;

PRACH frequency domain resource interval field: N _{RB, Gap} , indicating frequency interval of two PRACH resources on the same symbol;

As shown in the above table, the starting position of the frequency domain of SSblock 1 is N _RB,1 , then the starting position of the frequency domain of SS block 2 is N _{RB, 1} + N _{RB, Gap} ;

The starting position of the frequency domain of SSblock 3 is NRB, 2, then the starting position of the frequency domain of SS block 4 is N _{RB, 2} + N _{RB, Gap} . Embodiment 3: RACH configuration format

In the foregoing embodiment of the present disclosure, the PRACH resources to which different SS blocks are mapped occupy the same time domain resource (the same symbol), wherein the frequency domain locations may be the same and may be different.

In a 5G system, the RACH resources corresponding to multiple SS blocks are configured on the same symbol resource, which can reduce the terminal access delay. The solution also considers the analog-digital hybrid and all-digital beamforming architecture. Support a more flexible and unified mapping scheme.

a processor, configured to generate configuration information of a synchronization signal block and a random access resource association. Specifically, the synchronization signal block includes: N synchronization signal blocks, and the N synchronization signal blocks are transmitted by different digital beams. The association relationship is: among the N random access resources corresponding to the N synchronization signal blocks, at least 2 random access resources have the same time domain position; wherein N is a positive integer greater than or equal to 2;

The time domain locations of the N random access resources include: odd time slots within a system frame, even time slots within a system frame, or multiple time slots within a system frame.

The time domain locations of the N random access resources include: locations of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and even subframes The position of the M symbols in the odd time slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1. Preferably, the time domain location of the N random access resources includes: a location of M symbols in an odd slot of an odd subframe, and M of an even slot of an odd subframe in a transmission period of the synchronization signal The position of the symbol, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe.

Wherein, the M symbols include: M symbols starting from a last symbol of the time slot to a start symbol direction of the time slot.

The time domain resources of the N1+L random access resources are the same in the N random access resources, where N1 is the random access resource except the last one of the N random access resources. Any one of them, L is the number of random access resources consecutively arranged after the N1th random access resource.

The frequency domain resource location of the random access resource corresponding to the (N1+L) and the frequency domain resource location of the Nth random access resource are separated by a fixed value.

And receiving, by the network device, configuration information of a synchronization signal block and a random access resource, where the synchronization signal block includes: N synchronization signal blocks, where the N synchronization signal blocks are transmitted by different digital beams, The association relationship is: among the N random access resources corresponding to the N synchronization signal blocks, at least 2 random access resources have the same time domain position; wherein N is a positive integer greater than or equal to 2;

The time domain location of the N random access resources includes: an odd time slot in a system frame, an even time slot in a system frame, or multiple time slots in a system frame.

The time domain locations of the N random access resources include: locations of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and even subframes The position of the M symbols in the odd time slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1. Preferably, in the transmission period of the synchronization signal, the time domain locations of the N random access resources include: positions of M symbols in odd slots of odd subframes, and M positions in even slots of odd subframes The position of the symbol, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe.

The N1 random access resources are the same as the time domain resources of the N1+L random access resources, where N1 is the N random access resources. Any one of the last random access resources, L is the number of random access resources consecutively arranged after the N1 random access resources.

The frequency domain resource location of the random access resource corresponding to the N1+L and the frequency domain resource location of the N1 random access resources are separated by a fixed value.

The preamble sequence is transmitted on the number of symbols and/or slots indicated by the configuration information of the preamble sequence format.

In this embodiment, the RACH resources corresponding to the multiple SS blocks are also configured on the same symbol resource, which can reduce the terminal access delay. The scheme also considers the analog-digital hybrid and all-digital beamforming architecture. Support a more flexible and unified mapping scheme.

An embodiment of the present disclosure further provides a terminal, including:

The transceiver is configured to receive configuration information of a synchronization signal block and a random access resource association relationship sent by the network device. Specifically, the synchronization signal block includes: N synchronization signal blocks, where the N synchronization signal blocks are different digital beams. And transmitting, the association relationship is: among the N random access resources corresponding to the N synchronization signal blocks, at least two random access resources have the same time domain position; wherein N is a positive integer greater than or equal to 2; The downlink information is monitored on the random access resource indicated by the configuration information.

Preferably, the time domain location of the N random access resources includes: a location of M symbols in an odd slot of an odd subframe, and M of an even slot of an odd subframe in a transmission period of the synchronization signal The position of the symbol, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe.

Embodiments of the present disclosure also provide a communication device comprising: a processor, a memory storing a computer program, and when the computer program is executed by the processor, performing the method as described above. The processor and the memory can be connected through a bus or an interface.

Embodiments of the present disclosure also provide a computer readable storage medium comprising instructions that, when executed by a computer, cause a computer to perform the method as described above.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. It should be considered as the scope of protection of this disclosure.

Claims

A method for configuring a random access resource includes:

Generating configuration information of a synchronization signal block and a random access resource, the synchronization signal block includes N synchronization signal blocks, and the association relationship is: at least 2 out of N random access resources corresponding to N synchronization signal blocks The time domain locations of the random access resources are the same; wherein N is a positive integer greater than or equal to 2;

Sending the configuration information to the terminal.
The method for configuring a random access resource according to claim 1, wherein the frequency domain locations of the N random access resources are identical, partially identical, or different.
The method for configuring a random access resource according to claim 1, wherein the time domain locations of the N random access resources comprise: an odd time slot within a system frame, an even time slot within a system frame, or Multiple time slots within a system frame; or

The time domain locations of the N random access resources include: positions of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and odd times of even subframes The position of the M symbols in the slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1.
The method for configuring a random access resource according to claim 3, wherein the M symbols comprise: M symbols arranged from a last symbol of the time slot to a start symbol direction of the time slot.
The method for configuring a random access resource according to claim 3 or 4, wherein, among the N random access resources, the Nth random access resource is up to the time domain of the N1+L random access resources The location of the resource is the same, where N1 is any one of the N random access resources except the last one, and L is the number of consecutive random access resources after the N1 random access resource.
The method for configuring a random access resource according to claim 5, wherein a frequency domain resource location of the N1+L random access resources and a frequency domain resource location of the N1st random access resource are separated by a fixed value. .
The method for configuring a random access resource according to claim 1, wherein the configuration information further includes: configuration information of a preamble sequence format that the terminal can use in the random access procedure, and configuration of the preamble sequence format The information includes the number of symbols and/or the number of slots available when the terminal transmits the preamble sequence.
A network device, including:

a processor, configured to generate configuration information of a synchronization signal block and a random access resource association, where the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: N random connections corresponding to N synchronization signal blocks In the inbound resource, at least two random access resources have the same time domain location; wherein N is a positive integer greater than or equal to 2;

And a transceiver, configured to send the configuration information to the terminal.
The network device according to claim 8, wherein the frequency domain locations of the N random access resources are identical, partially identical, or different.
The network device of claim 8, wherein the time domain locations of the N random access resources comprise: odd time slots within a system frame, even time slots within a system frame, or multiple within a system frame Time slots; or

The time domain locations of the N random access resources include: positions of M symbols in odd slots of odd subframes, positions of M symbols in even slots of odd subframes, and odd times of even subframes The position of the M symbols in the slot or the position of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to 1.
The network device according to claim 10, wherein said M symbols comprise: M symbols arranged from a last symbol of said time slot to a start symbol direction of said time slot.
The network device according to claim 10 or 11, wherein, among the N random access resources, the Nth random access resource has the same position as the time domain resource of the N1+L random access resources. The N1 is any one of the N random access resources except the last one, and L is the number of consecutive random access resources after the N1 random access resources.
The network device according to claim 12, wherein the frequency domain resource location of the N1+L random access resources and the frequency domain resource location of the N1st random access resource are separated by a fixed value.
The network device according to claim 8, wherein the configuration information further includes: configuration information of a preamble sequence format that the terminal can use in the random access procedure, where the configuration information of the preamble sequence format includes the terminal sending The number of symbols and/or the number of slots available at the time of the preamble sequence.
A method for monitoring random access resources, including:

Receiving configuration information of a synchronization signal block and a random access resource association relationship sent by the network device, where the synchronization signal block includes: N synchronization signal blocks, where the association relationship is: N random accesses corresponding to N synchronization signal blocks In the resource, at least two random access resources have the same time domain location; wherein N is a positive integer greater than or equal to 2;

The downlink information is monitored on the random access resource indicated by the configuration information.
The method for monitoring a random access resource according to claim 15, wherein the frequency domain locations of the N random access resources are identical, partially identical, or different.
The method for monitoring a random access resource according to claim 15, wherein the time domain locations of the N random access resources comprise: an odd time slot within a system frame, an even time slot within a system frame, or a Multiple time slots within the system frame; or time domain locations of the N random access resources include: positions of M symbols in odd time slots of odd subframes, M positions in even time slots of odd subframes The position of the symbol, the position of the M symbols in the odd time slots of the even subframe or the positions of the M symbols in the even time slots of the even subframe; wherein M is a positive integer greater than or equal to 1.
The method for monitoring a random access resource according to claim 17, wherein the M symbols comprise: M symbols arranged from a last symbol of the time slot to a start symbol direction of the time slot.
The method for monitoring a random access resource according to claim 17 or 18, wherein, among the N random access resources, the Nth random access resource is up to the time domain of the N1+L random access resources The location of the resource is the same, where N1 is any one of the N random access resources except the last one, and L is the number of consecutive random access resources after the N1 random access resource. .
The method for monitoring a random access resource according to claim 19, wherein the frequency domain resource location of the random access resource corresponding to the N1+L is fixed to the frequency domain resource location of the N1 random access resource. value.
The method for monitoring a random access resource according to claim 15, wherein the configuration information further includes: configuration information of a preamble sequence format that the terminal can use in the random access procedure, and configuration of the preamble sequence format The information includes the number of symbols and/or the number of slots available when the terminal transmits the preamble sequence.
A terminal comprising:

The transceiver is configured to receive configuration information of a relationship between the N synchronization signal blocks and the random access resource sent by the network device, where the association relationship is: at least two of the N random access resources corresponding to the N synchronization signal blocks. The time domain location of the random access resource is the same; where N is a positive integer greater than or equal to 2; and the downlink information is monitored on the random access resource indicated by the configuration information.
The terminal according to claim 22, wherein the frequency domain locations of the N random access resources are identical, partially identical, or different.
The terminal according to claim 22, wherein the time domain locations of the N random access resources comprise: odd time slots within a system frame, even time slots within a system frame, or multiple within a system frame a time slot; or a time domain location of the N random access resources, including: positions of M symbols in odd time slots of odd subframes, positions of M symbols in even time slots of odd subframes, even numbers The position of the M symbols in the odd time slots of the frame or the positions of the M symbols in the even time slots of the even subframe; where M is a positive integer greater than or equal to one.
The terminal according to claim 24, wherein said M symbols comprise: M symbols arranged from a last symbol of said time slot to a start symbol direction of said time slot.
The terminal according to claim 24 or 25, wherein, among the N random access resources, the N1st random access resource has the same location as the time domain resource of the N1+L random access resources, wherein N1 is any one of the N random access resources except the last one, and L is the number of consecutive random access resources after the N1 random access resources.
The terminal according to claim 26, wherein the frequency domain resource location of the N1+L random access resources and the frequency domain resource location of the N1st random access resource are separated by a fixed value.
The terminal according to claim 22, wherein the configuration information further includes: configuration information of a preamble sequence format that the terminal can use in the random access procedure, and the configuration information of the preamble sequence format includes a terminal sending preamble The number of symbols and/or the number of slots available at the time of the code sequence.
A communication device comprising: a processor, a memory storing a computer program, the computer program being executed by the processor, performing the method of any one of claims 1-7, or any one of 15-21. The method described.
A computer readable storage medium comprising instructions which, when executed by a computer, cause the computer to perform the method of any of claims 1-7, or the method of any of clauses 15-21.