CN110636633A

CN110636633A - Random access method, terminal and network equipment

Info

Publication number: CN110636633A
Application number: CN201810652601.9A
Authority: CN
Inventors: 刘洋; 刘亮; 杨光
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Ltd Research Institute
Priority date: 2018-06-22
Filing date: 2018-06-22
Publication date: 2019-12-31

Abstract

The embodiment of the invention provides a random access method, a terminal and network equipment, wherein the random access method comprises the following steps: receiving an indication message of network equipment, wherein the indication message is used for indicating a terminal to initiate mode change information of a random access process; and initiating a random access process to the network equipment according to the indication information. The scheme of the embodiment of the invention can ensure that a plurality of terminals which send the same lead code to the network equipment can be accessed into the network equipment, thereby increasing the capacity of a network system and meeting the requirements of a plurality of terminals in random access scenes.

Description

Random access method, terminal and network equipment

Technical Field

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

Background

In 5G NR (New Radio, New wireless), an important feature is more users and differentiated usage scenarios, but the number of preambles of the existing contention-based random access procedure for LTE (Long Term Evolution) is limited, which limits the number of terminals accessing the network simultaneously.

Fig. 1 shows a contention-based random access procedure, in which multiple UEs transmit the same preamble sequence to an eNB (base station or network device) in the same subframe using the same PRACH (physical random access channel) resource, and wish to obtain resource authorization of the eNB, but at this time, the eNB cannot know which UE sent the request, so each UE needs to determine which UE is currently successfully accessed by sending a unique message (MSG3) only related to its own UE and a backhaul (MSG4) to the UE after the eNB receives the message, which is a contention resolution mechanism.

As shown in fig. 1, the contention-based random access procedure includes:

firstly, a terminal (UE) sends a random access request to a base station (eNB), wherein the request carries a Preamble (Preamble), namely the terminal sends MSG1 to the base station;

the terminal receives a Random Access Response (RAR) fed back by the base station, namely the base station sends MSG2 to the terminal;

the terminal sends a scheduling Transmission request (Schedule Transmission), such as a radio resource control connection/reestablishment/recovery message, to the base station, that is, the terminal sends MSG3 to the base station;

fourthly, the terminal receives the competition resolving message (competition Resolution) fed back by the base station, namely the base station sends the MSG4 to the terminal.

To accommodate multiple terminals sending the same preamble sequence to the base station and having access to the base station, 3GPP RAN1 is now discussing increasing the number of preambles, if increasing the number of bits of the preamble would cause the length of the preamble to no longer coincide with a byte length.

The random access process in the prior art cannot be applied to a scene of accessing a large number of terminals.

Disclosure of Invention

The invention provides a random access method, a terminal and network equipment, which can enable a plurality of terminals which send the same lead code to the network equipment to be accessed into the network equipment, increase the capacity of a network system and meet the requirements of a large number of terminal random access scenes.

To solve the above technical problem, an embodiment of the present invention provides the following solutions:

a random access method is applied to a terminal and comprises the following steps:

receiving an indication message of network equipment, wherein the indication message is used for indicating a terminal to initiate mode change information of a random access process;

and initiating a random access process to the network equipment according to the indication information.

Wherein, the step of initiating a random access procedure to the network device according to the indication information comprises:

when the indication information indicates that the terminal initiates the random access process and the random access process is changed from a first mode to a second mode, initiating the random access process to the network equipment according to the second mode; otherwise, initiating a random access process to the network equipment according to the first mode;

wherein in the first mode: the synchronous signal block and the lead code have a binding relation;

in the second mode: the synchronization signal block and the lead code have no binding relation, and the random access radio network temporary identifier RA-RNTI and the synchronization signal block have binding relation.

The step of initiating a random access procedure to the network device according to the second mode includes:

sending a random access request message to the network equipment, wherein the random access request message carries a lead code, and the lead code is selected from a lead code resource pool by a terminal;

and receiving a random access response message respectively sent by the network equipment under the beam coverage range corresponding to at least one synchronous signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronous signal block.

The random access response message carries a temporary scheduling identifier TC-RNTI allocated to the terminal by the network equipment, uplink scheduling time-frequency domain resources allocated to the terminal and an identifier of the lead code carried in the random access request message; wherein the content of the first and second substances,

RA-RNTIs adopted when at least one random access response message is scrambled are different from each other;

the TC-RNTIs carried by the at least one random response message are different from each other;

the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other;

the at least one random response message carries the same preamble identification.

The random access method further comprises the following steps:

decoding the at least one random access response message by a terminal in a beam coverage range corresponding to a target synchronization signal block by adopting RA-RNTI (random access-radio network temporary identifier) bound with the target synchronization signal block to obtain a target random access response message which is decoded successfully;

sending the uplink scheduling time-frequency domain resource distributed to the terminal by the network equipment, and adopting a radio resource control connection/reconstruction/recovery message scrambled by TC-RNTI carried in the target random access response message; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal;

and receiving a contention resolution message sent by the network equipment under the beam coverage range corresponding to the target synchronization signal block.

The embodiment of the invention also provides a random access method, which is applied to network equipment and comprises the following steps:

sending an indication message to a terminal, wherein the indication message is used for indicating the terminal to initiate mode change information of a random access process;

and receiving a random access flow initiated to the network equipment by the terminal according to the indication information.

The step of receiving the random access procedure initiated by the terminal to the network device according to the indication information includes:

when the indication information indicates that the terminal initiates the random access process and the random access process is changed from a first mode to a second mode, receiving the random access process initiated by the terminal to the network equipment according to the second mode; otherwise, receiving a random access flow initiated by the terminal to the network equipment according to the first mode;

The step of receiving the random access procedure initiated by the terminal to the network device according to the second mode includes:

receiving a random access request message sent by a terminal, wherein the random access request message carries a lead code selected by the terminal from a lead code resource pool;

and respectively sending random access response messages to the terminal under the beam coverage range corresponding to at least one synchronous signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronous signal block.

RA-RNTIs adopted when the at least one random access response message is scrambled are different from each other;

The random access method further comprises the following steps:

receiving a radio resource control connection/reconstruction/recovery message sent by a terminal in a beam coverage range corresponding to a target synchronization signal block on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal;

and sending a competition resolving message to the terminal under the beam coverage range corresponding to the target synchronization signal block.

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

the transceiver is used for receiving an indication message of the network device, wherein the indication message is used for indicating the terminal to initiate the mode change information of the random access process, and the random access process is initiated to the network device according to the indication information.

The transceiver is configured to initiate a random access procedure to the network device according to the indication information, and specifically configured to initiate the random access procedure to the network device according to the second mode when the indication information indicates that the terminal initiates the random access procedure and changes from the first mode to the second mode; otherwise, initiating a random access process to the network equipment according to the first mode;

When the transceiver initiates a random access procedure to the network device according to the second mode, the transceiver is specifically configured to:

RA-RNTIs of the preamble codes adopted when at least one random access response message is scrambled are different from each other;

Wherein the transceiver is further configured to: decoding the at least one random access response message by adopting an RA-RNTI (random access-radio network temporary identifier) bound with a target synchronization signal block to obtain a target random access response message which is decoded successfully;

sending a radio resource control connection/reconstruction/recovery message scrambled by TC-RNTI carried in the target random access response message on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal;

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

a transceiver, configured to send an indication message to a terminal, where the indication message is used to indicate the terminal to initiate mode change information of a random access procedure; and

and receiving a request of a random access process initiated to the network equipment by the terminal according to the indication information.

Wherein, when the indication information indicates that the terminal initiates a random access procedure to change from a first mode to a second mode, the transceiver is specifically configured to: receiving a random access flow initiated by the terminal to the network equipment according to the second mode; otherwise, receiving a random access flow initiated by the terminal to the network equipment according to the first mode;

When the transceiver receives a random access procedure initiated by the terminal to the network device according to the second mode, the transceiver is specifically configured to:

Wherein the transceiver is further configured to:

The embodiment of the invention also provides a random access method, which is applied to a terminal and comprises the following steps:

sending a random access request message to network equipment, wherein the random access request message carries a lead code, and the lead code is selected from a lead code resource pool by a terminal;

The random access method further comprises the following steps:

when at least one random access response message is scrambled, the adopted RA-RNTIs are different;

The random access method further comprises the following steps:

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

a transceiver, configured to send a random access request message to a network device, where the random access request message carries a preamble, and the preamble is selected by a terminal from a preamble resource pool; and

The transceiver is further configured to decode the at least one random access response message by using an RA-RNTI bound to a target synchronization signal block, so as to obtain a target random access response message that is decoded successfully;

the transceiver is used for receiving a random access request message sent by a terminal, wherein the random access request message carries a lead code selected by the terminal from a lead code resource pool;

Wherein the transceiver is further configured to:

receiving a wireless resource control connection/reconstruction/recovery message sent by a terminal in a beam coverage range corresponding to a target synchronization signal block on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal;

An embodiment of the present invention further provides a communication device, including: a processor, a memory storing a computer program which, when executed by the processor, performs the method as described above.

Embodiments of the present invention also provide a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The scheme of the invention at least comprises the following beneficial effects:

according to the scheme of the invention, the indication message of the network equipment is received, and the indication message is used for indicating the terminal to initiate the mode change information of the random access process; initiating a random access process to the network equipment according to the indication information; particularly, when the preamble initiated by the terminal in the random access procedure is not in a binding relationship with the at least one synchronization signal block, the terminal selects one preamble from the preamble resource pool, and a plurality of terminals sending the same preamble can share the preamble resource pool without dividing the preamble resource pool according to the synchronization signal block; the range of the terminal for selecting the lead code is enlarged, and through the random access process, a plurality of terminals which send the same lead code to the network equipment can be accessed to the network equipment, so that the capacity of a network system is increased, and the requirement of a large number of terminals on random access scenes is met.

Drawings

Fig. 1 is a schematic diagram of a conventional random access procedure;

fig. 2 is a flowchart illustrating a random access procedure according to a first embodiment of the present invention;

fig. 3 is a schematic view of an application scenario of a random access procedure according to an embodiment of the present invention;

fig. 4 is a specific flowchart of a first embodiment of a random access procedure according to the present invention;

fig. 5 is a flowchart illustrating a random access procedure according to a second embodiment of the present invention;

fig. 6 is a specific flowchart of a fifth embodiment of a random access procedure according to the embodiment of the present invention;

FIG. 7 is a flowchart of one specific implementation of the flowchart shown in FIG. 6;

fig. 8 is a detailed flowchart of a random access procedure according to a fourth embodiment of the present invention;

fig. 9 is a block diagram of a communication apparatus of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the invention provides a random access method, a terminal and network equipment aiming at the scene that a large number of terminals cannot be accessed in the random access process in the prior art, so that a plurality of terminals which send the same lead code to the network equipment can be accessed to the network equipment, the capacity of a network system is increased, and the requirement of the scene that a large number of terminals are accessed randomly is met.

As shown in fig. 2, a first embodiment of the present invention provides a random access method applied to a terminal, where the random access method includes:

step 21, receiving an indication message of the network device, where the indication message is used to indicate the terminal to initiate mode change information of the random access procedure, where the mode of the random access procedure may include: a first mode and a second mode, the first mode being: a synchronization signal block (SS block) has a binding relationship with the preamble; in a second mode: the synchronization signal block and the lead code have no binding relation, and the random access radio network temporary identifier RA-RNTI and the synchronization signal block have binding relation. One beam is bound with a plurality of synchronization signal blocks; the network device here may be a base station, such as a gbb; the terminal may receive the indication information from the broadcast information by detecting the broadcast information of the network device, and the broadcast information may be system information or the like.

Step 22, initiating a random access process to the network device according to the indication information; specifically, when the indication information indicates that the terminal initiates the random access procedure to be changed from a first mode to a second mode, the random access procedure is initiated to the network device according to the second mode; otherwise, initiating a random access procedure to the network device according to the first mode, and when the terminal initiates the random access procedure to the network device according to the second mode, the terminal selects a preamble from a preamble resource pool, where the preamble resource pool may be: for example, a preamble resource pool that can be shared by all terminals under multiple synchronization signal blocks under a beam coverage range, but in the prior art, when a terminal initiates a random access procedure, a preamble is only randomly selected from the preamble resource pool under the synchronization signal block where the terminal is located, in this embodiment, the terminal can select a preamble from the preamble resource pool that can be shared by multiple synchronization signal blocks, and the selection range of the preamble is widened without dividing the preamble resource pool according to the synchronization signal blocks.

In this embodiment of the present invention, an indication message of a network device is received, where the indication message is used to indicate a terminal to initiate mode change information of a random access procedure; initiating a random access process to the network equipment according to the indication information; particularly, when the preamble initiated by the terminal in the random access procedure is not in a binding relationship with the at least one synchronization signal block, the terminal selects one preamble from the preamble resource pool, and a plurality of terminals sending the same preamble can share the preamble resource pool without dividing the preamble resource pool according to the synchronization signal block; the range of the terminal for selecting the lead code is enlarged, and through the random access process, a plurality of terminals which send the same lead code to the network equipment can be accessed to the network equipment, so that the capacity of a network system is increased, and the requirement of a large number of terminals on random access scenes is met.

In a specific implementation of this embodiment, in the step 22, initiating the random access procedure to the network device according to the second mode specifically includes:

step 221, the terminal sends a random access request message to the network device, where the random access request message carries a preamble (RAPID, indicating a preamble that the terminal has sent), and the preamble is selected by the terminal from a preamble resource pool, corresponding to MSG1 in fig. 1;

step 222, receiving a random access response message respectively sent by the network device under a beam coverage range corresponding to at least one synchronization signal block, where the random access response message corresponds to MSG2 in fig. 1, and each random access response message in the at least one random access response message is scrambled by using a random access radio network temporary identifier RA-RNTI bound with the synchronization signal block; for example, the terminal receives 3 MSGs 2, each MSG2 is scrambled with a random access radio network temporary identity, RA-RNTI, of the preamble bound to one synchronization signal block, while different MSGs 2 use different RA-RNTIs.

In the random access process, a terminal selects a time-frequency resource to send a lead code, a sent subframe is located at the position of a PRACH (physical random access channel) resource, and RA-RNTI can be calculated, wherein the RA-RNTI is 1+ t _ id +10 f _ id, t _ id is an index of a first subframe of the designated PRACH resource, and the value range is (t _ id is more than or equal to 0 and less than or equal to 10); f _ id is the index of the PRACH specified by the subframe in the ascending order of the frequency domain, and the value range is (f _ id is more than or equal to 0 and less than 6).

After receiving the lead code of the terminal, the network equipment calculates RA-RNTI according to the PRACH time frequency resource position of the received lead code, so that one lead code corresponds to one RA-RNTI and one synchronous signal block, scrambles PDCCH by the RA-RNTI and sends a random access response message.

In this embodiment, the random access response message (i.e. in MSG2) carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, an uplink scheduling time-frequency domain resource (e.g. a physical uplink control channel PUCCH time-domain resource) allocated for the terminal, and an identity RAPID of the preamble carried in the random access request message; when at least one random access response message is scrambled, the adopted RA-RNTIs are different; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

In this embodiment, the method may further include:

step 223, decoding the at least one random access response message by using the RA-RNTI bound with the target synchronization signal block at the terminal within the beam coverage range corresponding to the target synchronization signal block to obtain a target random access response message successfully decoded;

for example, the terminal 2 under SS block 2 decodes multiple received MSGs 2 by using RA-RNTI bound to the SSB2, and the successfully decoded MSG2 is its own MSG 2;

step 224, sending on the uplink scheduling time-frequency domain resource allocated by the network device for the terminal, and using the radio resource control connection/reconstruction/recovery message scrambled by the TC-RNTI carried in the target random access response message; corresponding to MSG3 in fig. 1; the radio resource control connection/reestablishment/recovery message carries an identifier of a terminal, namely a competition resolving identifier;

step 225, receiving a contention resolution message (corresponding to MSG4 in fig. 1) sent by the network device under the beam coverage corresponding to the target synchronization signal block.

The following describes a specific implementation process of the above steps 231-235 with reference to a specific application scenario:

as shown in fig. 3, on the same RACH (random access channel) time-frequency resource, 3 UEs respectively located in the coverage of synchronization signal blocks SS block1 to SS block 3 (the SS blocks 1 to SS block 3 are bound to the same Rx beam, where the Rx beam refers to a downlink beam) select the same preamble to initiate a random access process: the preamble identifier RAPID of the preamble sent by the UE (1,2,3) to the network device gNB is 1, and at this time, the network device cannot know that several UEs perform random access simultaneously, and cannot know the SS block to which each UE wants to access.

As shown in fig. 4, the random access method includes:

step 10: a terminal (UE) receives broadcast information sent by a base station (i.e., the network device), where the broadcast information indicates whether a mode in which the terminal initiates a random access procedure is changed, where the mode may include a first mode and a second mode; in the first mode, the lead code and the SS block have a binding relationship, and the terminal can only select the lead code resource under the SS block where the terminal is located and receive the MSG2 sent by the network equipment in the SS block; in the second mode, the lead code and the SS block have no binding relationship, the terminal can select lead code resources under all SS blocks under the current beam and receive MSG2 issued by the network equipment under all SS blocks, and in the second mode, the SS blocks and the scrambling MSG2 have the binding relationship by using RA-RNTI.

Step 1, when the UE determines that the lead code is not bound with the SS block by monitoring the broadcast message, the UE selects the lead code of random access (selects one lead code from a lead code resource pool shared by all SS blocks under a beam) to initiate a random access process, namely sends MSG1 to network equipment; when receiving the MSG2, confirming that RA-RNTI (random access radio network temporary identifier for indicating the time-frequency resource position for sending the lead code) corresponding to the lead code is bound with SS block index (index of synchronous signal block), and decoding the MSG2 by adopting the RA-RNTI in the subsequent access flow;

and 2, after receiving the lead code sent by the UE, the base station sends RARs (random access responses) on all SS blocks related to time-frequency resources sent by the MSG1, wherein the SS blocks related to the time-frequency resources sent by the MSG1 refer to all the SS blocks initiating the MSG1, and RARs (namely MSG2) corresponding to each SS block are scrambled by RA-RNTIs related to each SS block. The T _ C _ RNTI carried by the corresponding RAR on each SS block is different from the PUCCH time-frequency domain resource on the UL grant, but the RAPIDs (the identification field indicating the sent preamble) carried by the RAR are the same;

step 3, the UE decodes the MSG2 by using the RA-RNTI bound with the SS block where the UE is located;

and 4, step 4: the UE scrambles MSG3 according to TC-RNTI carried by RAR and sends MSG3 (radio resource control connect/re-establish/resume message) on the uplink grant resource, where MSG3 carries collision resolution ID, such as the identity of the terminal.

And 5, the base station decodes the conflict resolution ID carried by the MSG3 sent by the UE and sends MSG4, namely a contention resolution message, to the terminal.

In this embodiment of the present invention, through the above procedure, the UE receives and completes the random access procedure.

In the process, a plurality of terminals such as UEs (1,2,3) which send the same preamble to the network device may all receive MSG2 sent by the network device under SS block 1-3, that is, each terminal may receive 3 MSGs 2;

in the step 3, each terminal uses the RA-RNTI bound to the SS block where the terminal is located to decode the MSG2 sent by the network device under the synchronization signal block, for example, the terminal 1 uses the RA-RNTI bound to the SS block1 where the terminal is located, and can successfully decode the MSG2-1 sent by the synchronization signal block 1(SS block1), and the other two received MSG2-2 and MSG2-3 cannot be successfully decoded, an optional mode is to discard the MSG2-2 and MSG2-3, where the MSG2-2 is the MSG2 sent by the network device under the beam coverage range corresponding to the SS block 2, and similarly, the MSG2-3 network device is the MSG2 sent by the network device under the beam coverage range corresponding to the SS block 3;

for terminals 2 and 3, the same method can be adopted to successfully decode the MSG2 belonging to the terminals; thus, all 3 terminals can perform the next random access process, for example, the processes of the steps 4 and 5 are performed, and finally, all 3 terminals can access the network device;

in the prior art, based on the above contention random access procedure, 3 terminals carrying the same preamble under 3 synchronization signal blocks initiate a random access procedure, and finally only one terminal can be accessed.

In another specific implementation manner of this embodiment of the present invention, when the indication information indicates that the terminal initiates a random access procedure and performs access in the first mode, the random access procedure may be performed according to a procedure shown in fig. 1, and specifically includes:

firstly, a terminal (UE) sends a random access request to a base station (eNB), wherein the request carries a Preamble (Preamble) selected randomly, namely the terminal sends MSG1 to the base station;

the terminal sends a scheduling Transmission request (Schedule Transmission), namely the terminal sends MSG3, namely a radio resource control connection/reconstruction/recovery message to the base station;

As shown in fig. 5, a second embodiment of the present invention further provides a random access method applied to a network device, where the random access method corresponds to the method in fig. 2 or fig. 4, and the random access method includes:

step 51, sending an indication message to the terminal, where the indication message is used to indicate the terminal to initiate mode change information of a random access procedure; here, the network device may determine the mode change information of the random access procedure according to the number of terminals currently expected to access the network device.

Step 52, receiving the random access procedure initiated by the terminal to the network device according to the indication information.

In the embodiment of the invention, the indication message is sent to the terminal, the indication message is used for indicating the terminal to initiate the mode change information of the random access process, and the random access process initiated by the receiving terminal to the network equipment according to the indication message can also enable a plurality of terminals which send the same lead code to the network equipment to be accessed to the network equipment, thereby increasing the capacity of the network system and meeting the requirements of a large number of terminals on the scene of random access.

In a specific implementation manner of this embodiment, when the indication information indicates that the terminal initiates the random access procedure and changes from the first mode to the second mode, the receiving terminal receives the random access procedure initiated by the terminal to the network device according to the second mode; otherwise, receiving a random access flow initiated by the terminal to the network equipment according to the first mode;

Specifically, in step 52, the random access procedure initiated by the receiving terminal to the network device according to the second mode may include:

step 521, receiving a random access request message sent by a terminal, where the random access request message carries a preamble selected by the terminal from a preamble resource pool;

step 522, respectively sending random access response messages to the terminal under the beam coverage range corresponding to at least one synchronization signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronization signal block.

The random access response message carries a temporary scheduling identifier TC-RNTI allocated to the terminal by the network equipment, uplink scheduling time-frequency domain resources allocated to the terminal and an identifier of the lead code carried in the random access request message; wherein RA-RNTIs adopted when the at least one random access response message is scrambled are different from each other; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

Further, the random access procedure may further include:

step 523, receiving a radio resource control connection/reconstruction/recovery message sent by the terminal in the beam coverage range corresponding to a target synchronization signal block on the uplink scheduling time-frequency domain resource allocated to the terminal by the network device; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal;

step 524, sending a contention resolution message to the terminal under the beam coverage corresponding to the target synchronization signal block.

The specific implementation of steps 521-524 may refer to the implementation procedures shown in fig. 3 and fig. 4, and compared with the prior art, the method according to the above embodiment of the present invention may enable multiple terminals that send the same preamble to the network device to all access the network, increase the capacity of the network system, and meet the requirement of a large number of terminals in a random access scenario.

In another specific implementation manner of this embodiment of the present invention, when the indication information indicates that the terminal performs the random access procedure in the first mode, specifically performing the random access procedure according to the procedure shown in fig. 1 includes:

firstly, receiving a random access request sent by a terminal, wherein the request carries a randomly selected Preamble (Preamble), namely the terminal sends MSG1 to a base station;

a Random Access Response (RAR) fed back to the terminal, that is, the base station sends MSG2 to the terminal;

receiving a scheduling Transmission request (Schedule Transmission) sent by the terminal, namely, the terminal sends MSG3, namely, a radio resource control connection/reconstruction/recovery message to the base station;

fourthly, the base station sends a competition resolving message (competition Resolution) to the terminal, namely the MSG4 to the terminal.

Corresponding to the random access method described in the first embodiment, a third embodiment of the present invention further provides a terminal, including:

The random access response message carries a temporary scheduling identifier TC-RNTI allocated to the terminal by the network equipment, uplink scheduling time-frequency domain resources allocated to the terminal and an identifier of the lead code carried in the random access request message; wherein RA-RNTIs of the preambles, which are adopted when at least one random access response message is scrambled, are different from each other; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

Wherein the transceiver is further configured to: decoding the at least one random access response message by adopting an RA-RNTI (random access-radio network temporary identifier) bound with a target synchronization signal block to obtain a target random access response message which is decoded successfully; sending a radio resource control connection/reconstruction/recovery message scrambled by TC-RNTI carried in the target random access response message on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal; and receiving a contention resolution message sent by the network equipment under the beam coverage range corresponding to the target synchronization signal block.

It should be noted that all the implementations of the methods shown in fig. 2 to fig. 4 are applicable to the embodiment of the terminal, and the same technical effect can be achieved. And further, in an embodiment of the terminal, the terminal may further include a memory and a processor, the transceiver and the processor may be communicatively connected through a bus interface or an interface, and the transceiver and the memory may also be communicatively connected through a bus interface or an interface. The functions of the above-described transceiver may also be implemented by a processor. The terminal of the invention may also comprise other means, such as a user interface, for implementing the above-described method.

Corresponding to the random access method described in the second embodiment, a fourth embodiment of the present invention further provides a network device, including:

When the indication information indicates that the terminal initiates a random access procedure and changes from a first mode to a second mode, the transceiver is specifically configured to: receiving a random access flow initiated by the terminal to the network equipment according to the second mode; otherwise, receiving a random access flow initiated by the terminal to the network equipment according to the first mode;

When the transceiver receives a random access procedure initiated by the terminal to the network device according to the second mode, the transceiver is specifically configured to: receiving a random access request message sent by a terminal, wherein the random access request message carries a lead code selected by the terminal from a lead code resource pool; and respectively sending random access response messages to the terminal under the beam coverage range corresponding to at least one synchronous signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronous signal block.

The random access response message carries a temporary scheduling identifier TC-RNTI allocated to the terminal by the network equipment, uplink scheduling time-frequency domain resources allocated to the terminal and an identifier of the lead code carried in the random access request message; wherein RA-RNTIs adopted when at least one random access response message is scrambled are different from each other; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

Wherein the transceiver is further configured to: receiving a radio resource control connection/reconstruction/recovery message sent by a terminal in a beam coverage range corresponding to a target synchronization signal block on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal; and sending a competition resolving message to the terminal under the beam coverage range corresponding to the target synchronization signal block.

It should be noted that all the implementations of the method shown in fig. 5 are applicable to the embodiment of the network device, and the same technical effect can be achieved. And further, in an embodiment of the network device, the network device may further include a memory, the transceiver and the processor are communicatively connected through a bus interface or an interface, and the transceiver and the memory are also communicatively connected through a bus interface or an interface. The functions of the above-described transceiver may also be implemented by a processor. The network device of the present invention may also include other components that implement the above-described methods.

As shown in fig. 6, a fifth embodiment of the present invention further provides a random access method applied to a terminal, where the random access method includes:

step 61, sending a random access request message to a network device, where the random access request message carries a preamble (RAPID), and the preamble is selected by a terminal from a preamble resource pool, where the random access request message corresponds to MSG1 in fig. 1, and the preamble resource pool may be a preamble resource pool shared by multiple synchronization signal blocks;

step 62, receiving a random access response message respectively sent by the network device under the beam coverage range corresponding to at least one synchronization signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronization signal block; for example, the terminal receives 3 MSGs 2, each MSG2 uses RA-RNTI bound with its own sync signal block for scrambling, and different MSGs 2 use different RA-RNTIs.

In this embodiment, the random access response message carries a temporary scheduling identity TC-RNTI allocated to the terminal by the network device, an uplink scheduling time-frequency domain resource allocated to the terminal, and an identity of the preamble carried in the random access request message; wherein RA-RNTIs adopted when at least one random access response message is scrambled are different from each other; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

Further, this embodiment further includes:

step 63, the terminal in the beam coverage range corresponding to a target synchronization signal block decodes the at least one random access response message by using the RA-RNTI bound to the target synchronization signal block to obtain a successfully decoded target random access response message, where the random access response message corresponds to MSG2 in fig. 1, for example, in the coverage range of a synchronization signal block 1(SSLblock1) where the terminal 1 is located, the SSLblock1 is the second target synchronization signal block, the terminal decodes the received multiple MSGs 2 by using the RA-RNTI bound to the SSLblock1, and the successfully decoded MSG2 is the MSG2 belonging to the terminal;

step 64, sending the radio resource control connection/reconstruction/recovery message scrambled by TC-RNTI carried in the target random access response message on the uplink scheduling time-frequency domain resource allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal; corresponding to MSG3 in fig. 1; the scheduling transmission request message carries the identifier of the terminal;

in step 65, the terminal receives a contention resolution message (corresponding to MSG4 in fig. 1) sent by the network device under the beam coverage corresponding to the target synchronization signal block.

The following describes a specific implementation process of the above embodiment with reference to the scenario shown in fig. 3 and the flow shown in fig. 7:

As shown in fig. 7, the random access procedure includes:

step 1, a terminal (UE) sends MSG1 to network equipment;

and 2, after receiving the lead code sent by the UE, the base station sends RARs (random access responses) on all SS blocks relevant to the time-frequency resource sent by the MSG1, and RARs corresponding to each SS block are scrambled by RA-RNTIs relevant to each SS block. The T _ C _ RNTI carried by the corresponding RAR (i.e. MSG2) on each SS block is different from the PUCCH time-frequency domain resource on the UL grant, but the carried RAPID (preamble identification field, indicating the transmitted preamble) is the same;

and step 3: the UE decodes the MSG2 using the RA-RNTI bound to the SS block;

and 4, step 4: the UE scrambles MSG3 according to TC-RNTI (temporary scheduling identity allocated for the terminal) carried by the RAR, and sends MSG3 on the uplink grant resource, carrying a collision resolution ID, such as the identity of the terminal.

Corresponding to the method shown in fig. 6, as shown in fig. 8, a sixth embodiment of the present invention further provides a random access method, which is applied to a network device, where the random access method includes:

step 81, receiving a random access request message sent by a terminal, wherein the random access request message carries a lead code selected by the terminal from a lead code resource pool;

and 82, respectively sending random access response messages to the terminal under the beam coverage range corresponding to the at least one synchronous signal block, wherein each random access response message in the at least one random access response message is scrambled by a random access radio network temporary identifier RA-RNTI bound with the synchronous signal block.

The random access response message carries a temporary scheduling identifier TC-RNTI allocated to the terminal by the network equipment, uplink scheduling time-frequency domain resources allocated to the terminal and the identifier of the lead code carried in the random access request message; when at least one random access response message is scrambled, the adopted RA-RNTIs are different; the TC-RNTIs carried by the at least one random response message are different from each other; the uplink scheduling time-frequency domain resources carried by the at least one random response message and allocated to the terminal are different from each other; the at least one random response message carries the same preamble identification.

Further, this embodiment may further include:

step 83, receiving a radio resource control connection/reconstruction/recovery message sent by a terminal in a beam coverage range corresponding to a target synchronization signal block on an uplink scheduling time-frequency domain resource allocated to the terminal by the network device; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the wireless resource control connection/reconstruction/recovery message carries the identifier of the terminal

Step 84, sending a contention resolution message to the terminal under the beam coverage corresponding to the target synchronization signal block.

The specific implementation of steps 81 to 84 may refer to the implementation procedures shown in fig. 3 and fig. 7, and compared with the prior art, the method according to the above embodiment of the present invention may enable multiple terminals that have sent the same preamble to the network device to all access the network, increase the capacity of the network system, and meet the requirement of a large number of terminals in a random access scenario.

A seventh embodiment of the present invention provides, corresponding to the method in the fifth embodiment, a terminal, including:

Further, in the embodiment of the terminal: the transceiver is further configured to decode the at least one random access response message by using an RA-RNTI bound with a target synchronization signal block to obtain a target random access response message that is decoded successfully; sending the uplink scheduling time-frequency domain resource distributed to the terminal by the network equipment, and adopting a radio resource control connection/reconstruction/recovery message scrambled by TC-RNTI carried in the target random access response message; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal; and receiving a contention resolution message sent by the network equipment under the beam coverage range corresponding to the target synchronization signal block.

It should be noted that all the implementation manners of the method described in the above fifth embodiment are applicable to the embodiment of the terminal, and the same technical effect can be achieved. And further, in an embodiment of the terminal, the terminal may further include a memory and a processor, the transceiver and the processor may be communicatively connected through a bus interface or an interface, and the transceiver and the memory may also be communicatively connected through a bus interface or an interface. The functions of the above-described transceiver may also be implemented by a processor. The terminal of the invention may also comprise other means, such as a user interface, for implementing the above-described method.

Corresponding to the method in the sixth embodiment, an eighth embodiment of the present invention further provides a network device, including:

Further, the transceiver is further configured to: receiving a wireless resource control connection/reconstruction/recovery message sent by a terminal in a beam coverage range corresponding to a target synchronization signal block on uplink scheduling time-frequency domain resources allocated to the terminal by the network equipment; the radio resource control connection/reconstruction/recovery message is scrambled by adopting TC-RNTI carried in a target random access response message, and the target random access response message is a random access response message which is obtained by decoding the at least one random access response message by adopting RA-RNTI bound with the target synchronous signal block by the terminal and is decoded successfully; the radio resource control connection/reconstruction/recovery message carries the identifier of the terminal; and sending a competition resolving message to the terminal under the beam coverage range corresponding to the target synchronization signal block.

It should be noted that all the implementation manners of the method shown in the above sixth embodiment are applicable to the embodiment of the network device, and the same technical effect can be achieved. And further, in an embodiment of the network device, the network device may further include a memory and a processor, and the transceiver and the processor are communicatively connected through a bus interface or an interface, and the transceiver and the memory may also be communicatively connected through a bus interface or an interface. The functions of the above-described transceiver may also be implemented by a processor.

As shown in fig. 9, a communication device 90 of the present invention includes: a processor 92, a memory 93 in which a computer program is stored, which computer program, when being executed by the processor 92, is adapted to carry out the method according to the embodiments described above.

It should be noted that the communication device may further include: the transceiver 91 is communicatively connected to the processor 92 via a bus interface or an interface, and the transceiver 91 and the memory 93 may be communicatively connected via a bus interface or an interface. The functions of the above-described transceiver may also be implemented by a processor. The communication device of the present invention may further comprise other components, such as a user interface, for implementing the method, and all implementations in the above method embodiments are applicable to the embodiment of the communication device, so as to achieve the same technical effect. The communication device may be the terminal described in the above embodiment, or may be the network device described in the above embodiment, such as a base station.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it is to be noted that in the device and method of the invention, it is obvious that the individual components or steps can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A random access method applied to a terminal is characterized by comprising the following steps:

2. The random access method according to claim 1, wherein the step of initiating a random access procedure to the network device according to the indication information comprises:

3. The random access method of claim 2, wherein the step of initiating the random access procedure to the network device according to the second mode comprises:

4. The random access method according to claim 3, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

5. The random access method of claim 4, further comprising:

6. A random access method is applied to network equipment, and is characterized by comprising the following steps:

7. The random access method according to claim 6, wherein the step of receiving the random access procedure initiated by the terminal to the network device according to the indication information comprises:

8. The random access method according to claim 7, wherein the step of receiving the random access procedure initiated by the terminal to the network device according to the second mode comprises:

9. The random access method according to claim 8, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

10. The random access method of claim 9, further comprising:

11. A terminal, comprising:

12. The terminal according to claim 11, wherein the transceiver is configured to initiate a random access procedure to the network device according to the second mode when the indication information indicates that the terminal initiates the random access procedure and changes from a first mode to a second mode; otherwise, initiating a random access process to the network equipment according to the first mode;

13. The terminal according to claim 12, wherein when the transceiver initiates the random access procedure to the network device according to the second mode, the transceiver is specifically configured to:

14. The terminal according to claim 13, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

15. The terminal of claim 14, wherein the transceiver is further configured to:

decoding the at least one random access response message by adopting an RA-RNTI (random access-radio network temporary identifier) bound with a target synchronization signal block to obtain a target random access response message which is decoded successfully;

16. A network device, comprising:

17. The network device according to claim 16, wherein when the indication information indicates that the terminal initiates the random access procedure to change from the first mode to the second mode, the transceiver is specifically configured to: receiving a random access flow initiated by the terminal to the network equipment according to the second mode; otherwise, receiving a random access flow initiated by the terminal to the network equipment according to the first mode;

18. The network device according to claim 17, wherein when the transceiver receives the random access procedure initiated by the terminal to the network device according to the second mode, the transceiver is specifically configured to:

19. The network device according to claim 18, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device to the terminal, uplink scheduling time-frequency domain resources allocated to the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

20. The network device of claim 19, wherein the transceiver is further configured to:

21. A random access method applied to a terminal is characterized by comprising the following steps:

22. The random access method according to claim 21, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

23. The random access method of claim 22, further comprising:

24. A random access method is applied to network equipment, and is characterized by comprising the following steps:

25. The random access method according to claim 24, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

26. The random access method of claim 25, further comprising:

27. A terminal, comprising:

28. The terminal according to claim 27, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device for the terminal, uplink scheduling time-frequency domain resources allocated for the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

29. The terminal of claim 28, wherein the transceiver is further configured to decode the at least one random access response message using an RA-RNTI bound with a target synchronization signal block, so as to obtain a target random access response message with successful decoding;

30. A network device, comprising:

31. The network device according to claim 30, wherein the random access response message carries a temporary scheduling identity TC-RNTI allocated by the network device to the terminal, uplink scheduling time-frequency domain resources allocated to the terminal, and the identity of the preamble carried in the random access request message; wherein the content of the first and second substances,

32. The network device of claim 31, wherein the transceiver is further configured to:

33. A communication device, comprising: a processor, a memory storing a computer program which, when executed by the processor, performs the method of any of claims 1-5, the method of any of claims 6-10, the method of any of claims 21-23, or the method of any of claims 24-26.

34. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-5, the method of any of claims 6-10, the method of any of claims 21-23, or the method of any of claims 24-26.