CN110213819A - Wave beam failure recovery method and device - Google Patents
Wave beam failure recovery method and device Download PDFInfo
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- CN110213819A CN110213819A CN201810167254.0A CN201810167254A CN110213819A CN 110213819 A CN110213819 A CN 110213819A CN 201810167254 A CN201810167254 A CN 201810167254A CN 110213819 A CN110213819 A CN 110213819A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
This application discloses provide a kind of wave beam failure recovery method and device, to guarantee the uplink synchronous of terminal during BFR, so that whether terminal can be fed back completes wave beam failure recovery, guarantee that base station can know whether terminal completes wave beam failure recovery.A kind of wave beam failure recovery method provided by the present application comprises determining that terminal initiates wave beam failure recovery BFR process；In the corresponding random access response window of the BFR, the terminal is dispatched by the corresponding physical downlink control channel PDCCH of the terminal, and indicate the timing advance TA value that the terminal uses.
Description
Technical field
This application involves field of communication technology more particularly to wave beam failure recovery method and devices.
Background technique
In 5G new wireless technology (NR) system, the mode that wave beam forming is widely used is transmitted, and terminal and base station exist
The reception of determining wave beam transmitting signaling and data, base station and terminal, send wave interfascicular have corresponding relationship.When terminal measures
The beam-channel poor quality of work at present needs to initiate wave beam failure recovery (Beam Failure Recovery, BFR) mistake
Journey.Wave beam failure recovery refers to that terminal picks up the wave beam (beam) that channel quality is met the requirements.
Summary of the invention
The embodiment of the present application provides a kind of wave beam failure recovery method and device, to guarantee terminal during BFR
Uplink synchronous guarantees whether base station can know terminal so that whether terminal can be fed back completes wave beam failure recovery
Complete wave beam failure recovery.
In network side, a kind of wave beam failure recovery method provided by the embodiments of the present application, comprising:
Determine that terminal initiates wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, pass through the corresponding Physical Downlink Control Channel of the terminal
PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
In this way, determining that terminal initiates wave beam failure recovery BFR process, rung in the corresponding random access of the BFR
It answers in window, the terminal is dispatched by the corresponding physical downlink control channel PDCCH of the terminal, and indicate that the terminal uses
Timing advance TA value, allow terminal to obtain the TA value for uplink synchronous, thereby may be ensured that terminal during BFR
Uplink synchronous feeds back terminal correctly and whether completes wave beam failure recovery, guarantees whether base station can know terminal
Complete wave beam failure recovery, and in time, correctly carry out subsequent processing.
Optionally, by receiving the BFR dedicated preamble preamble of terminal transmission, determine that terminal initiates BFR process.
To which the BFR dedicated preamble preamble that network side can be sent based on terminal easily determines terminal hair very much
BFR process is played.
Optionally, the corresponding PDCCH of the terminal is added using the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of the terminal
The PDCCH disturbed.
To which network side can determine the corresponding PDCCH of terminal based on the scrambled PDCCH of C-RNTI using terminal.
Optionally, the TA value used using one of following manner instruction terminal:
Mode one: timing advance order is carried on the physical down link sharing channel PDSCH of PDCCH scheduling
TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit of the BFR is transmitted on the PDSCH of PDCCH scheduling
Uplink UL TA information is carried in PDU, the RAR MAC PDU.
By carrying timing advance order TAC matchmaker on the physical down link sharing channel PDSCH that the PDCCH is dispatched
Body access control MAC control unit CE, alternatively, transmitting the corresponding RAR MAC of the BFR on the PDSCH of PDCCH scheduling
Uplink UL TA information is carried in Packet Data Unit PDU, the RAR MACPDU, so as to quickly and conveniently will be whole
The TA value used is held to be indicated to terminal.
Optionally, in the mode one, the PDCCH is the BFR Special leader that network side receives that the terminal is sent
The re-transmission of first PDCCH or first PDCCH after code preamble.
So that terminal can pass through first PDCCH or after the BFR dedicated preamble preamble of transmission
The re-transmission of one PDCCH obtains the TA value for being used for uplink synchronous.
Optionally, in the mode one,
The TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling；
Alternatively, when determining the terminal i.e. by uplink loss or uplink loss, in PDCCH scheduling
The TAC MAC CE is carried on PDSCH.
The TAC MAC CE is always carried on the PDSCH dispatched by the PDCCH, can save process flow, nothing
Whether terminal need to be judged i.e. by uplink loss or uplink loss, on the PDSCH dispatched every time to the PDCCH that terminal is sent
All carry the TAC MAC CE, the TA value that instruction terminal uses；Alternatively,
When determining terminal i.e. by uplink loss or uplink loss, carried on the PDSCH of PDCCH scheduling
The TAC MAC CE, when the TA value used without instruction terminal, can not carry TAC so as to save signaling overheads
MAC CE。
Optionally, when the difference of current time and TA moment of time-out of timer is less than or equal to pre-determined threshold, described in determination
Terminal is i.e. by uplink loss.
To, by current time compared with TA moment of time-out of timer, can be determined terminal i.e. by uplink loss,
And it may further be at the terminal before row step-out, by sending TA value to terminal, so that terminal avoids uplink loss.
Optionally, in the mode one, the bit number that the TA value in the TAC MAC CE occupies is according to uplink timing
What required precision determined；And/or
In the mode two, the bit number that the UL TA information in the RAR MAC PDU occupies is according to uplink timing essence
Degree requires determining.
It should be noted that the bit number that TA value occupies can require to determine according to uplink timing accuracy, occupancy 6 can be
Bit or 8 bits or 10 bits or 12 bits etc., can specifically be decided according to the actual requirements.
Optionally, in the mode one, TA value in the TAC MAC CE occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits；And/or
In the mode two, UL TA information in the RAR MAC PDU occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits.
It should be noted that the bit number that UL TA information occupies can require to determine according to uplink timing accuracy, can be
6 bits or 8 bits or 10 bits or 12 bits etc. are occupied, can be specifically decided according to the actual requirements.
Optionally, in the mode two, UL grant and/or RAP id information is also carried in the RAR MAC PDU.
Correspondingly, in terminal side, a kind of wave beam failure recovery method provided by the embodiments of the present application, comprising:
Initiate wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, physical downlink control channel PDCCH is monitored, also, obtain net
The timing advance TA value of network side instruction.
Wave beam failure recovery BFR process is initiated by terminal side, in the corresponding random access response window of the BFR, prison
Physical downlink control channel PDCCH is listened, also, obtains the timing advance TA value of network side instruction, so as to be based on the TA
Whether value carries out uplink TA adjustment, avoids uplink loss, keep uplink synchronous, terminal is fed back correctly, in time complete
At wave beam failure recovery, guarantee that base station can know whether terminal completes wave beam failure recovery, and in time, correctly carry out
Subsequent processing.
Optionally, the TA value of network side instruction is obtained using one of following manner:
Mode one: the timing advance carried on the physical down link sharing channel PDSCH that the PDCCH is dispatched is obtained
Order TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data of the BFR transmitted on the PDSCH that the PDCCH is dispatched is obtained
Unit PDU obtains uplink UL TA information from the RAR MAC PDU.
Optionally, this method further include:
Uplink TA adjustment is carried out based on the TA value.
In network side, a kind of wave beam failure recovery device provided by the embodiments of the present application, comprising:
Memory, for storing program instruction；
Processor is executed for calling the program instruction stored in the memory according to the program of acquisition:
Determine that terminal initiates wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, pass through the corresponding Physical Downlink Control Channel of the terminal
PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
Optionally, by receiving the BFR dedicated preamble preamble of terminal transmission, determine that terminal initiates BFR process.
Optionally, the corresponding PDCCH of the terminal is added using the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of the terminal
The PDCCH disturbed.
Optionally, the TA value used using one of following manner instruction terminal:
Mode one: timing advance order is carried on the physical down link sharing channel PDSCH of PDCCH scheduling
TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit of the BFR is transmitted on the PDSCH of PDCCH scheduling
Uplink UL TA information is carried in PDU, the RAR MAC PDU.
Optionally, in the mode one, the PDCCH is the BFR Special leader that network side receives that the terminal is sent
The re-transmission of first PDCCH or first PDCCH after code preamble.
Optionally, in the mode one,
The TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling；
Alternatively, when determining the terminal i.e. by uplink loss or uplink loss, in PDCCH scheduling
The TAC MAC CE is carried on PDSCH.
Optionally, when the difference of current time and TA moment of time-out of timer is less than or equal to pre-determined threshold, described in determination
Terminal is i.e. by uplink loss.
Optionally, in the mode one, the bit number that the TA value in the TAC MAC CE occupies is according to uplink timing
What required precision determined；And/or
In the mode two, the bit number that the UL TA information in the RAR MAC PDU occupies is according to uplink timing essence
Degree requires determining.
Optionally, in the mode one, TA value in the TAC MAC CE occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits；And/or
In the mode two, UL TA information in the RAR MAC PDU occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits.
Optionally, in the mode two, UL grant and/or RAP id information is also carried in the RAR MAC PDU.
Correspondingly, in terminal side, a kind of wave beam failure recovery device provided by the embodiments of the present application, comprising:
Memory, for storing program instruction；
Processor is executed for calling the program instruction stored in the memory according to the program of acquisition:
Initiate wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, physical downlink control channel PDCCH is monitored, also, obtain net
The timing advance TA value of network side instruction.
Optionally, the TA value of network side instruction is obtained using one of following manner:
Mode one: the timing advance carried on the physical down link sharing channel PDSCH that the PDCCH is dispatched is obtained
Order TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data of the BFR transmitted on the PDSCH that the PDCCH is dispatched is obtained
Unit PDU obtains uplink UL TA information from the RAR MAC PDU.
Optionally, the processor is also used to:
Uplink TA adjustment is carried out based on the TA value.
In network side, another kind wave beam failure recovery device provided by the embodiments of the present application, comprising:
Determination unit, for determining that terminal initiates wave beam failure recovery BFR process；
Scheduling unit is used in the corresponding random access response window of the BFR, by under the corresponding physics of the terminal
Row control channel PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
In terminal side, another kind wave beam failure recovery device provided by the embodiments of the present application, comprising:
Unit is initiated, for initiating wave beam failure recovery BFR process；
Monitoring unit, for monitoring Physical Downlink Control Channel in the corresponding random access response window of the BFR
PDCCH, also, obtain the timing advance TA value of network side instruction.
Another embodiment of the application provides a kind of computer storage medium, and the computer storage medium is stored with calculating
Machine executable instruction, the computer executable instructions are for making the computer execute any of the above-described kind of method.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, the drawings in the following description are only some examples of the present application, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow diagram of non-competing accidental access method provided by the embodiments of the present application；
Fig. 2 is a kind of flow diagram of wave beam failure recovery method of network side provided by the embodiments of the present application；
Fig. 3 is a kind of flow diagram of wave beam failure recovery method of terminal side provided by the embodiments of the present application；
Fig. 4 is the form schematic diagram of the TAC MAC CE provided by the embodiments of the present application using 6bit TA value；
Fig. 5 is the form schematic diagram of the TAC MAC CE provided by the embodiments of the present application using 8bit TA value；
Fig. 6 is the form schematic diagram of the TAC MAC CE provided by the embodiments of the present application using 10bit TA value；
Fig. 7 is the form schematic diagram of the TAC MAC CE provided by the embodiments of the present application using 12bit TA value；
Fig. 8 is a kind of structural schematic diagram of wave beam failure recovery device of network side provided by the embodiments of the present application；
Fig. 9 is a kind of structural schematic diagram of wave beam failure recovery device of terminal side provided by the embodiments of the present application；
Figure 10 is the structural schematic diagram of another wave beam failure recovery device of network side provided by the embodiments of the present application；
Figure 11 is the structural schematic diagram of another wave beam failure recovery device of terminal side provided by the embodiments of the present application.
Specific embodiment
The embodiment of the present application provides a kind of wave beam failure recovery method and device, to guarantee terminal during BFR
Uplink synchronous guarantees whether base station can know terminal so that whether terminal can be fed back completes wave beam failure recovery
Complete wave beam failure recovery.
Random access procedure can be non-competing random access or competition random access, wherein non-competing random access mistake
Journey is as shown in Figure 1, be broadly divided into three steps:
Msg0: base station is used to UE distribution for the dedicated preamble and random access of non-competing random access
PRACH resource.
Msg1:UE is sent in specified PRACH resource to base station specified dedicated according to the instruction of Msg0
preamble.Base station receives and calculates uplink timing advance TA according to Msg1 after Msg1.
Msg2: base station sends random access response to UE.In most of random access scenes, the format of random access response
As competition random access, MAC RARPDU (MAC Random Access is dispatched using the PDCCH with RA-RNTI
Response Protocol Data Unit), (Random is identified comprising random access lead code in MAC RAR PDU
Access Preamble ID, RAP ID), Timing Advance information TAC, subsequent upstream transmission resource allocation UL grant, eventually
End passes through the RAP ID completion contention resolved identical as the preamble code that Msg1 is sent in random access response MACRAR.
New wireless (New Radio, NR) the interface physical layer transmission of 5G is based on beam (wave beam), when generation beam failure
(failure) after, terminal can execute wave beam failure recovery (Beam Failure Recovery, BFR) process.The process is logical
Random access realization is crossed, terminal selection particular beam is specifically included, random access is initiated, thinks after random access success at this
Wave beam failure recovery is completed on selected wave beam.Random access procedure for wave beam failure recovery can be non-competing to be connect at random
Enter or compete random access.
For example, BFR can be used non-competing random access (Contention Free Random Access, CFRA), eventually
End sends BFR dedicated preamble (preamble), and then base station is based on the scrambled PDCCH dispatch terminal of C-RNTI, and terminal receives
To after PDCCH, is confirmed that (ACK)/non-acknowledgement (NACK) is fed back to base station, base station is allowed to know that terminal beams are recovered.Its
In, in the non-competing random access procedure under this scene, Msg2 is the PDCCH for carrying C-RNTI, as long as the C-RNTI and end
The C-RNTI at end is consistent, and terminal judges random access success, thus the success of wave beam failure recovery.
It specifically, include: network side for the non-competing random access of BFR is that terminal configures alternative beam set
(candidate beam set), distributes non-competing access-in resource (PRACH resource on multiple wave beams of alternative beam set
And/or preamble code), if terminal, which is selected on wave beam, non-competing random access resource, non-competing random access is initiated,
After terminal sends Msg1, terminal C- is received in the resource coreset of the reception PDCCH order of configuration within setup time
The scrambled PDCCH order of RNTI, then it is assumed that non-competing random access success.For the non-competing random access for BFR, base station
At the beginning of configuring independent random access parameter, including random access response window long (ra-ResponseWindow-BFR), preamble
Begin to receive target power (preambleInitialReceivedTargetPower-BFR), power to climb step-length
(powerRampingStep-BFR), largest random access attempts number (PreambleTransMax-BFR) etc..
But if uplink loss has occurred during BFR in terminal, it is anti-to will be unable to progress uplink ACK/NACK
Feedback, base station will be unable to know that terminal has completed BFR process.Based on this, technical solution provided by the embodiments of the present application, Ke Yishi
Uplink synchronous during existing BFR, it is ensured that the uplink synchronous of terminal during BFR, to guarantee that base station can be known end
End completes the recovery of beam failure.
It is special to receive the BFR that terminal is sent including network side equipment for wave beam failure recovery scheme provided by the embodiments of the present application
With preamble, then in the corresponding random access response of BFR (Random Access Response, RAR) window (window)
It is interior transmission based on the terminal Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell Radio Network Temporary Identity,
C-RNTI) scrambled Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) needs simultaneously
Indicate timing advance (Timing Advance, TA) value that the terminal can be used.
Referring to fig. 2, in network side, a kind of wave beam failure recovery method provided by the embodiments of the present application, comprising:
S101, determine that terminal initiates wave beam failure recovery BFR process；
S102, in the corresponding random access response window of the BFR, pass through the terminal corresponding physical down control letter
Road PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
It is alternatively possible to determine that terminal initiates BFR by the BFR dedicated preamble preamble for receiving terminal transmission
Process.
Optionally, the corresponding PDCCH of the terminal is that the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI based on the terminal adds
The PDCCH disturbed.
Correspondingly, referring to Fig. 3, in terminal side, a kind of wave beam failure recovery method provided by the embodiments of the present application, comprising:
S201, wave beam failure recovery BFR process is initiated；
S202, in the corresponding random access response window of the BFR, monitor physical downlink control channel PDCCH, also,
Obtain the timing advance TA value of network side instruction.
For example, terminal to network side equipment send BFR dedicated preamble, then preamble transmission after first
PDCCH opportunity (occasion) starts the corresponding RAR window of BFR, and the logical of network transmission is monitored in the RAR window
The scrambled PDCCH of C-RNTI is crossed, and obtains the TA value of network side instruction.
Optionally, this method further include:
Terminal is based on the TA value and carries out TA adjustment.
The TA value that the above network side instruction terminal can be used can be there are many mode:
Mode one: in physical down link sharing channel (the Physical Downlink Shared of PDCCH scheduling
Channel, PDSCH) on carry timing advance order (Timing Advance Command, TAC) media access control
(Media Access Control, MAC) control unit (Control Element, CE), wherein the PDCCH, such as can
Be network side receive the terminal transmission BFR dedicated preamble after first PDCCH or first PDCCH weight
It passes.
Mode two: the corresponding RAR MAC packet data unit of transmission BFR on the PDSCH of PDCCH scheduling
(Packet Data Unit, PDU) carries uplink (Uplink, UL) TA information in the corresponding RAR MAC PDU of BFR.
Based on mode one, network side carries TAC MAC CE, the carrying TAC on the PDSCH that the PDCCH is dispatched
The condition of MAC CE can be but not limited to following any one:
Alt 1: TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling.
Alt 2: whether network side equipment judges to initiate the terminal of BFR process i.e. by uplink loss or uplink mistake
Step, if it is, carrying TAC MAC CE on the PDSCH of PDCCH scheduling.Otherwise, in PDCCH scheduling
PDSCH is upper can not to carry TAC MAC CE.
Optionally, judge described in Alt 2 terminal whether i.e. by the Rule of judgment of uplink loss for example: current time and TA
Difference≤the pre-determined threshold at timer (TAT) time-out moment.
Wherein, the specific value of pre-determined threshold can be decided according to the actual requirements.
About the judgement of terminal step-out, can according to timing advance timer (TAT), whether time-out judges, if overtime
Then step-out, there are no step-outs if not having time-out.
Wherein, TAT overtime moment, the i.e. timing length of TAT, the timing length of TAT can also be decided according to the actual requirements.
Based on mode one, the format of TAC MAC CE can be but be not limited to following any one:
Referring to fig. 4, the existing TAC MAC CE using 6bit TA value is continued to use；
Introduce it is new using the TA value of 8bit or 10bit or 12bit or the TACMAC CE of other bit numbers, with
And the corresponding new Logic Channel Identifier (Logic Channel ID, LCID) of the TAC MAC CE.
Wherein,
8bit TAC MAC CE format is for example, see Fig. 5；
10bit TAC MAC CE format is for example, see Fig. 6；
12bit TAC MAC CE format is for example, see Fig. 7.
It should be noted that TAG (Timing Alignment Group, Timing Advance group) ID, guarantor in Fig. 4~7
Stay bit (reserved bit) and the corresponding bit of timing advance order (Timing Advance Command) in TAC
Position in MAC CE can flexibly change.
Optionally, it is based on mode two, the bit number that the UL TA information in the corresponding RAR MAC PDU of BFR occupies can be
6 bits or 8 bits or 10 bits or 12 bits, it is of course also possible to be other bit values, depending on being mentioned to uplink timing
The demand of preceding adjustment accuracy of measurement.
The corresponding RAR MAC PDU of BFR includes at least UL TA instructions field, optionally can also include UL scheduling grant
(grant) instructions field and/or RAP id information.Wherein, UL grant instructions field is used to indicate the money that subsequent upstream transmission uses
Source.
Several specific embodiments are described below:
Embodiment 1 (corresponding aforesaid way one):
The wave beam failure recovery method that the embodiment provides, comprising:
Step 1: terminal, which determines, occurs wave beam failure (BF).
Wherein, how terminal specifically judges whether that BF occurs, and can continue to use existing BF judgment mechanism.
Step 2: terminal initiates BFR process.
For example, terminal to network side equipment send BFR dedicated preamble, then preamble transmission after first
PDCCH occasion starts the corresponding RAR window of BFR, and the C- sent based on network is monitored in the RARwindow
The scrambled PDCCH of RNTI, while needing to receive the TA value of network side instruction.
Wherein, the TA value that network side instruction terminal can be used, such as use such as under type:
TAC MAC CE is carried on the PDSCH of PDCCH scheduling, the PDCCH is that network side receives the terminal
The re-transmission of first PDCCH or first PDCCH after the BFR dedicated preamble of transmission.
Network side carries TAC MAC CE, the condition for carrying TACMAC CE on the PDSCH that the PDCCH is dispatched
It can be but not limited to following any one:
Alt 1: TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling.
Alt 2: whether network side equipment judges to initiate the terminal of BFR process i.e. by uplink loss or uplink mistake
Step, if it is, carrying TAC MAC CE on the PDSCH of PDCCH scheduling.Otherwise, in PDCCH scheduling
PDSCH is upper can not to carry TAC MAC CE.
Following any one can be but not limited to for the format of above-mentioned TAC MAC CE, TAC MAC CE:
Referring to fig. 4, the existing TAC MAC CE using 6bit TA value is continued to use；
Introduce it is new using 8bit 10bit TA or 12bit TA value or the TAC MAC CE of other bit numbers,
And its corresponding new LCID.
Wherein,
8bit TAC MAC CE format is for example, see Fig. 5；
10bit TAC MAC CE format is for example, see Fig. 6；
12bit TAC MAC CE format is for example, see Fig. 7.
Wherein, TAG ID, reserved bit and the corresponding bit of Timing Advance Command are in TAC MAC
Position in CE can flexibly change.
Step 3: terminal receives the scrambled PDCCH of C-RNTI in the corresponding RAR window of BFR.
If TAC MAC CE is carried on the PDSCH of PDCCH scheduling, according to the TAC MAC CE middle finger
The TA value shown carries out the adjustment of uplink timing advance.
Embodiment 2 (corresponding aforesaid way two):
The wave beam failure recovery method that the embodiment provides, comprising:
Step 1: terminal, which determines, occurs BF.
Wherein, how terminal specifically judges whether that BF occurs, and can continue to use existing BF judgment mechanism.
Step 2: terminal initiates BFR process.
For example, terminal to network side equipment send BFR dedicated preamble, then preamble transmission after first
PDCCH occasion starts the corresponding RAR window of BFR, and the C- sent based on network is monitored in the RARwindow
The scrambled PDCCH of RNTI, while needing to receive the TA value of network side instruction.
Wherein, the TA value that network side instruction terminal can be used uses such as under type:
The corresponding RAR MAC PDU of transmission BFR corresponding RAR MAC PDU, BFR on the PDSCH of PDCCH scheduling
Middle carrying UL TA information.
The corresponding RAR MAC PDU of BFR includes at least UL TA instructions field, optionally can also comprising UL grant and/or
RAP ID instructions field.The bit number that UL TA information in UL TA instructions field occupies can be 6 bits or 8 bits or 10 ratios
Special or 12 bits, it is of course also possible to be other bit values, depending on the demand to uplink timing advance adjustment accuracy of measurement.
Step 3: terminal receives the scrambled PDCCH of C-RNTI in the corresponding RAR window of BFR.
If TAC MAC CE is carried on the PDSCH of PDCCH scheduling, according to indicating in the TAC MAC CE
TA value carry out uplink timing advance adjustment.
Device provided by the embodiments of the present application is described below.
In network side, referring to Fig. 8, a kind of wave beam failure recovery device provided by the embodiments of the present application, comprising:
Memory 520, for storing program instruction；
Processor 500 is executed for calling the program instruction stored in the memory according to the program of acquisition:
Determine that terminal initiates wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, pass through the corresponding Physical Downlink Control Channel of the terminal
PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
Optionally, processor 500 receives the BFR dedicated preamble preamble of terminal transmission by transceiver 510, really
Determine terminal and initiates BFR process.
Optionally, the corresponding PDCCH of the terminal is added using the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI of the terminal
The PDCCH disturbed.
Optionally, the TA value used using one of following manner instruction terminal:
Mode one: timing advance order is carried on the physical down link sharing channel PDSCH of PDCCH scheduling
TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit of the BFR is transmitted on the PDSCH of PDCCH scheduling
Uplink UL TA information is carried in PDU, the RAR MAC PDU.
Optionally, in the mode one, the PDCCH is the BFR Special leader that network side receives that the terminal is sent
The re-transmission of first PDCCH or first PDCCH after code preamble.
Optionally, in the mode one,
The TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling；
Alternatively, when determining the terminal i.e. by uplink loss or uplink loss, in PDCCH scheduling
The TAC MAC CE is carried on PDSCH.
Optionally, when the difference of current time and TA moment of time-out of timer is less than or equal to pre-determined threshold, described in determination
Terminal is i.e. by uplink loss.
Optionally, in the mode one, the bit number of occupancy is determined according to uplink timing accuracy requirement；And/or
In the mode two, the bit number that the UL TA information in the RAR MAC PDU occupies is according to uplink timing essence
Degree requires determining.
Optionally, in the mode one, TA value in the TAC MAC CE occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits；And/or
In the mode two, UL TA information in the RAR MAC PDU occupies 6 bits or 8 bits or 10 ratios
Special or 12 bits.
Optionally, in the mode two, UL grant and/or RAP id information is also carried in the RAR MAC PDU.
Transceiver 510, for sending and receiving data under control of the processor 500.
Wherein, in fig. 8, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 500
The various circuits for the memory that the one or more processors and memory 520 of representative represent link together.Bus architecture is also
Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all
It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 510 can
To be multiple element, that is, includes transmitter and transceiver, the list for communicating over a transmission medium with various other devices is provided
Member.Processor 500, which is responsible for management bus architecture and common processing, memory 520, can store processor 500 and is executing operation
When used data.
Processor 500 can be centre and bury device (CPU), specific integrated circuit (Application Specific
Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array,
) or Complex Programmable Logic Devices (Complex Programmable Logic Device, CPLD) FPGA.
Correspondingly, referring to Fig. 9, in terminal side, a kind of wave beam failure recovery device provided by the embodiments of the present application, comprising:
Memory 620, for storing program instruction；
Processor 600 is executed for calling the program instruction stored in the memory according to the program of acquisition:
Initiate wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, physical downlink control channel PDCCH is monitored, also, obtain net
The timing advance TA value of network side instruction.
Optionally, BFR dedicated preamble is sent by transceiver 610, initiates BFR process.
Optionally, the TA value of network side instruction is obtained using one of following manner:
Mode one: the timing advance carried on the physical down link sharing channel PDSCH that the PDCCH is dispatched is obtained
Order TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data of the BFR transmitted on the PDSCH that the PDCCH is dispatched is obtained
Unit PDU obtains uplink UL TA information from the RAR MAC PDU.
Optionally, the processor 600 is also used to:
Uplink TA adjustment is carried out based on the TA value.
Transceiver 610, for sending and receiving data under the control of processor 600.
Wherein, in Fig. 9, bus architecture may include the bus and bridge of any number of interconnection, specifically by processor 600
The various circuits for the memory that the one or more processors and memory 620 of representative represent link together.Bus architecture is also
Various other circuits of such as peripheral equipment, voltage-stablizer and management circuit or the like can be linked together, these are all
It is it is known in the art, therefore, it will not be further described herein.Bus interface provides interface.Transceiver 610 can
To be multiple element, that is, includes transmitter and receiver, the list for communicating over a transmission medium with various other devices is provided
Member.For different user equipmenies, user interface 630, which can also be, external the interface for needing equipment is inscribed, and connection is set
Standby including but not limited to keypad, display, loudspeaker, microphone, control stick etc..
Processor 600, which is responsible for management bus architecture and common processing, memory 620, can store processor 600 and is holding
Used data when row operation.
Optionally, processor 600 can be CPU (centre buries device), ASIC (Application Specific
Integrated Circuit, specific integrated circuit), (Field-Programmable Gate Array, scene can compile FPGA
Journey gate array) or CPLD (Complex Programmable Logic Device, Complex Programmable Logic Devices).
In network side, referring to Figure 10, another kind wave beam failure recovery device provided by the embodiments of the present application, comprising:
Determination unit 11, for determining that terminal initiates wave beam failure recovery BFR process；
Scheduling unit 12, for passing through the corresponding physics of the terminal in the corresponding random access response window of the BFR
Down control channel PDCCH dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
In terminal side, referring to Figure 11, another kind wave beam failure recovery device provided by the embodiments of the present application, comprising:
Unit 21 is initiated, for initiating wave beam failure recovery BFR process；
Monitoring unit 22, for monitoring Physical Downlink Control Channel in the corresponding random access response window of the BFR
PDCCH, also, obtain the timing advance TA value of network side instruction.
In the embodiment of the present application, the wave beam failure recovery device of above-mentioned network side can be network side equipment, e.g. base
It stands.
In the embodiment of the present application, the wave beam failure recovery device of above-mentioned terminal side can be terminal device, e.g. UE
Deng.
Method provided by the embodiments of the present application can be applied to terminal device, also can be applied to the network equipment.
In the embodiment of the present application, terminal device be also referred to as user equipment (User Equipment, referred to as " UE "),
Mobile station (Mobile Station, referred to as " MS "), mobile terminal (Mobile Terminal) etc., optionally, which can
To have the ability communicated through wireless access network (Radio Access Network, RAN) with one or more core nets,
For example, terminal can be mobile phone (or being " honeycomb " phone) or the computer etc. with mobile property, for example, terminal
Can also be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device.
In the embodiment of the present application, the network equipment can be base station (for example, access point), refer to the accession in net in the sky on interface
Pass through the equipment of one or more sectors and wireless terminal communications.The air frame that base station can be used for receive is grouped with IP and carries out phase
Mutually conversion, as the router between wireless terminal and the rest part of access net, wherein the rest part for accessing net may include
Internet protocol (IP) network.Attribute management of the base station also tunable to air interface.For example, base station can be in GSM or CDMA
Base station (BTS, Base Transceiver Station), be also possible to the base station (NodeB) in WCDMA, can also be LTE
In evolved base station (NodeB or eNB or e-NodeB, evolutional Node B), or be also possible in 5G system
GNB etc..In present aspect embodiment without limitation.
Above method process flow can realize that the software program can store in storage medium with software program, when
When the software program of storage is called, above method step is executed.
The embodiment of the present application provides a kind of computer storage medium, above-mentioned provided by the embodiments of the present application for being stored as
Computer program instructions used in device, it includes the programs for executing above-mentioned either method provided by the embodiments of the present application.
The computer storage medium can be any usable medium or data storage device that computer can access, packet
Include but be not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optic disk (MO) etc.), optical memory (such as CD, DVD,
BD, HVD etc.) and semiconductor memory (such as it is ROM, EPROM, EEPROM, nonvolatile memory (NAND FLASH), solid
State hard disk (SSD)) etc..
In conclusion network side equipment receives the BFR dedicated preamble that terminal is sent, then in the embodiment of the present application
It is sent in the corresponding RAR window of BFR and is based on the scrambled PDCCH of terminal C-RNTI, while needing to indicate that the terminal can be with
The TA value used.It is thus possible to guarantee the uplink synchronous of terminal during BFR, it is further ensured that base station can know that terminal is complete
At the recovery of wave beam failure.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The shape for the computer program product implemented in usable storage medium (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (29)
1. a kind of wave beam failure recovery method, which is characterized in that this method comprises:
Determine that terminal initiates wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, pass through the corresponding physical downlink control channel PDCCH tune of the terminal
The terminal is spent, and indicates the timing advance TA value that the terminal uses.
2. the method according to claim 1, wherein passing through the BFR dedicated preamble for receiving terminal transmission
Preamble determines that terminal initiates BFR process.
3. the method according to claim 1, wherein the corresponding PDCCH of the terminal, is using the small of the terminal
The area scrambled PDCCH of radio network temporary identifier C-RNTI.
4. the method according to claim 1, wherein indicating the TA that the terminal uses using one of following manner
Value:
Mode one: timing advance order TAC matchmaker is carried on the physical down link sharing channel PDSCH of PDCCH scheduling
Body access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit PDU of the BFR, institute are transmitted on the PDSCH of PDCCH scheduling
State carrying uplink UL TA information in RAR MAC PDU.
5. according to the method described in claim 4, it is characterized in that, the PDCCH is that network side receives in the mode one
The re-transmission of first PDCCH or first PDCCH after the BFR dedicated preamble preamble that the terminal is sent.
6. according to the method described in claim 4, it is characterized in that, in the mode one,
The TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling；
Alternatively, when determining the terminal i.e. by uplink loss or uplink loss, in the PDSCH of PDCCH scheduling
It is upper to carry the TAC MAC CE.
7. according to the method described in claim 6, it is characterized in that, current time and the difference of TA moment of time-out of timer are less than
Or when being equal to pre-determined threshold, determine the terminal i.e. by uplink loss.
8. according to the method described in claim 4, it is characterized in that, the TA value in the TACMAC CE accounts in the mode one
Bit number is determined according to uplink timing accuracy requirement；And/or
In the mode two, the bit number that the UL TA information in the RAR MAC PDU occupies is wanted according to uplink timing accuracy
Ask determining.
9. according to the method described in claim 4, it is characterized in that, in the mode one, TA value in the TACMAC CE,
Occupy 6 bits or 8 bits or 10 bits or 12 bits；And/or
In the mode two, UL TA information in the RAR MAC PDU, occupy 6 bits or 8 bits or 10 bits or
12 bit of person.
10. according to the method described in claim 4, it is characterized in that, also being carried in the RARMAC PDU in the mode two
There are UL grant and/or random access lead code mark RAP id information.
11. a kind of wave beam failure recovery method, which is characterized in that this method comprises:
Initiate wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, physical downlink control channel PDCCH is monitored, also, obtain network side
The timing advance TA value of instruction.
12. according to the method for claim 11, which is characterized in that obtain the TA of network side instruction using one of following manner
Value:
Mode one: the timing advance order carried on the physical down link sharing channel PDSCH that the PDCCH is dispatched is obtained
TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit of the BFR transmitted on the PDSCH that the PDCCH is dispatched is obtained
PDU obtains uplink UL TA information from the RAR MAC PDU.
13. according to the method for claim 11, which is characterized in that this method further include:
Uplink TA adjustment is carried out based on the TA value.
14. a kind of wave beam failure recovery device characterized by comprising
Memory, for storing program instruction；
Processor is executed for calling the program instruction stored in the memory according to the program of acquisition:
Determine that terminal initiates wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, pass through the corresponding physical downlink control channel PDCCH tune of the terminal
The terminal is spent, and indicates the timing advance TA value that the terminal uses.
15. device according to claim 14, which is characterized in that by the BFR dedicated preamble for receiving terminal transmission
Preamble determines that terminal initiates BFR process.
16. device according to claim 14, which is characterized in that the corresponding PDCCH of the terminal, is using the terminal
The scrambled PDCCH of Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI.
17. device according to claim 14, which is characterized in that indicate what the terminal used using one of following manner
TA value:
Mode one: timing advance order TAC matchmaker is carried on the physical down link sharing channel PDSCH of PDCCH scheduling
Body access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit PDU of the BFR, institute are transmitted on the PDSCH of PDCCH scheduling
State carrying uplink UL TA information in RAR MAC PDU.
18. device according to claim 17, which is characterized in that in the mode one, the PDCCH is that network side receives
The re-transmission of first PDCCH or first PDCCH after the BFR dedicated preamble preamble sent to the terminal.
19. device according to claim 17, which is characterized in that in the mode one,
The TAC MAC CE is always carried on the PDSCH of the PDCCH scheduling；
Alternatively, when determining the terminal i.e. by uplink loss or uplink loss, in the PDSCH of PDCCH scheduling
It is upper to carry the TAC MAC CE.
20. device according to claim 19, which is characterized in that current time and the difference of TA moment of time-out of timer are small
When pre-determined threshold, determine the terminal i.e. by uplink loss.
21. device according to claim 17, which is characterized in that the TA value in the mode one, in the TACMAC CE
The bit number of occupancy is determined according to uplink timing accuracy requirement；And/or
In the mode two, the bit number that the UL TA information in the RAR MAC PDU occupies is wanted according to uplink timing accuracy
Ask determining.
22. device according to claim 17, which is characterized in that the TA in the mode one, in the TACMAC CE
Value occupies 6 bits or 8 bits or 10 bits or 12 bits；And/or
In the mode two, UL TA information in the RAR MAC PDU, occupy 6 bits or 8 bits or 10 bits or
12 bit of person.
23. device according to claim 17, which is characterized in that in the mode two, also taken in the RARMAC PDU
With UL grant and/or RAP id information.
24. a kind of wave beam failure recovery device characterized by comprising
Memory, for storing program instruction；
Processor is executed for calling the program instruction stored in the memory according to the program of acquisition:
Initiate wave beam failure recovery BFR process；
In the corresponding random access response window of the BFR, physical downlink control channel PDCCH is monitored, also, obtain network side
The timing advance TA value of instruction.
25. device according to claim 24, which is characterized in that obtain the TA of network side instruction using one of following manner
Value:
Mode one: the timing advance order carried on the physical down link sharing channel PDSCH that the PDCCH is dispatched is obtained
TAC media access control MAC control unit CE；
Mode two: the corresponding RAR MAC packet data unit of the BFR transmitted on the PDSCH that the PDCCH is dispatched is obtained
PDU obtains uplink UL TA information from the RAR MAC PDU.
26. device according to claim 24, which is characterized in that the processor is also used to:
Uplink TA adjustment is carried out based on the TA value.
27. a kind of wave beam failure recovery device characterized by comprising
Determination unit, for determining that terminal initiates wave beam failure recovery BFR process；
Scheduling unit, for passing through the corresponding physical down control of the terminal in the corresponding random access response window of the BFR
Channel PDCCH processed dispatches the terminal, and indicates the timing advance TA value that the terminal uses.
28. a kind of wave beam failure recovery device characterized by comprising
Unit is initiated, for initiating wave beam failure recovery BFR process；
Monitoring unit, in the corresponding random access response window of the BFR, monitoring physical downlink control channel PDCCH, and
And obtain the timing advance TA value of network side instruction.
29. a kind of computer storage medium, which is characterized in that the computer storage medium is stored with the executable finger of computer
It enables, the computer executable instructions are for making the computer perform claim require 1 to 13 described in any item methods.
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| CN110213819B (en) | 2021-05-18 |
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