CN102158981A - Contention-based uplink data transmission method and system - Google Patents

Contention-based uplink data transmission method and system Download PDF

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CN102158981A
CN102158981A CN2010101150489A CN201010115048A CN102158981A CN 102158981 A CN102158981 A CN 102158981A CN 2010101150489 A CN2010101150489 A CN 2010101150489A CN 201010115048 A CN201010115048 A CN 201010115048A CN 102158981 A CN102158981 A CN 102158981A
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base station
message
resource
response message
sends
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CN102158981B (en
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黄亚达
张健
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a contention-based uplink data transmission method and a contention-based uplink data transmission system. Resource wasting is avoided, and a data transmission delay is shortened. The uplink data transmission method comprises that: a base station transmits uplink authorization information to user equipment (UE) to indicate the position of contention resources and a transmission way of transmitting uplink data on the contention resources; the UE transmits the uplink data according to the indicated transmission way on the contention resources indicated by the uplink authorization information; the base station returns a response message to the UE to indicate whether the data on the contention resources are successfully received or not to the UE; and after receiving the response message, the UE confirms whether the transmission of the uplink data on the contention resources is successful or failed according to the response message.

Description

A kind of uplink data transmission method and system based on competition
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of uplink data transmission method and system based on competition.
Background technology
In wireless communication system, (User Equipment UE) in the starting stage of transmission data, needs to utilize the resource of competition (Contention) to subscriber equipment usually.This mainly contains two kinds of scenes: a kind of is to insert at random when UE is linked into network for the first time, another kind of situation be when UE behind access network, in the process of the gap of data, can enter resting state (dormant), with the battery expense of saving UE and the resource overhead of network, network can be not be given the UE reserved resource or is only reserved seldom resource, when upstream data need send, the minor resource of UE by inserting at random or passing through to reserve, as sending the signaling network on the signaling channel of special use, to obtain follow-up uplink transmission resource.
Random access procedure, with LTE (Long Term Evolution, the 3GPP Long Term Evolution) system is an example, the same with most of cellular communication systems, insert at random and divide 4 steps, as shown in Figure 1, UE at first initiates to insert at random pilot tone (Random Access Preamble), network receives successfully, and the back sends accidental access response (Random Access Response), allow UE adjust up transmission in advance, on the resource of the transmission MSG3 of appointment (message 3 among the figure), send the data of competition then, the resource of this transmission MSG3 is the shared resource of dynamic dispatching in LTE, so be called as RACH (Radom Access Channel equally in before other cellular system, Random Access Channel) channel resource fixed configurations difference, the resource of LTE are to be indicated by the uplink authorization that carries in the accidental access response (UL grant).UE can carry the data that will transmit in MSG3, and the solution sign (UE contentionresolution ID) of conflicting, and after network side receives, replys MSG4 (competing solution), carries corresponding competition and solves sign, thinks after UE receives and competes solution.
Method for another reserve dedicated resources, be called the scheduling application process again, with insert at random different, can only be used for connected state UE, as shown in Figure 2, after UE finishes connection, be in during the professional gap, the ascending control channel of a special use of network reservation is given UE, discharges other physical channel resources.When UE needs uplink data sending, can on the ascending control channel of special use, send dispatch request (Scheduling Request, SR).Network receives that the back just can send schedule information (SR grant, dispatch request mandate) and give UE, and UE just can carry out transmitting uplink data on scheduled resources then.
Comparison diagram 1 and Fig. 2 can see, the 3rd message of two flow processs, the upstream data of UE can be sent to the base station, distinguishing be the message 1 and 2 of random access procedure shown in Figure 1 be one based on process of competition, so-called competition is that the resource that message 1 sends is that a plurality of UE share, so may send message 1 simultaneously at a plurality of UE of synchronization, cause the base station may fail to the reception of message 1.Scheduling application shown in Figure 2 comes down to a kind of non-competing process, and the channel of its up transmission SR is the UE private resource, can not clash, so relative saying, dispatching application process transmission data generally speaking can be faster than random access procedure.
Two kinds of above-mentioned upstream data process of transmittings, though difference to some extent on the principle, in process of transmitting, when UE needs uplink data sending, at first send a request (MSG1), reply back (MSG2) then in the base station, UE could real uplink data sending (MSG3).Because 2 steps in front have been arranged, cause UE a time delay to be arranged during to real transmission when upstream data arrives, insert MSG1 at random and may conflict, if conflicted, need restart another time at random access can cause time delay longer.In the LTE system, the time delay of scheduling application process generally has 11.5ms.
Some small data quantities, the business (as game service) of prolonging in short-term are responsive especially to above-mentioned time delay, in order to reduce above-mentioned time delay, there is scheme to adopt the mode of pre-scheduling resource, be whether network has data regardless of UE, always distribute the data channel of a special use to give UE, when UE needs uplink data sending, just can on this dedicated data channel, send data, as shown in Figure 3, UE just can uplink data sending at MSG1, and its transmission delay can reduce to 5.5ms in the LTE system.The shortcoming of this scheme is that a part of private resource need be reserved to UE in the base station, no matter whether UE has transmitting uplink data, so can cause the waste of resource.
For fear of the above-mentioned wasting of resources, above-mentioned dedicated data channel can be changed into the competition data channel, realization is based on transmission (the Contention based transmission of competition, the CB transmission), ascending resource is shared in several UE, when UE need use, send data by competition, as shown in Figure 4, when the UE number of sharing more after a little while, can obtain preferable performance.
Though provided the preparative course of up CB transmission in the prior art, there is not complete scheme to solve as yet and proposes, take place for conflict, abnormality processing flow processs such as data transmission fault do not have perfect processing procedure yet.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of uplink data transmission method and system based on competition, avoids the wasting of resources, shortens the time delay that data send.
For solving the problems of the technologies described above, the invention provides a kind of uplink data transmission method based on competition, comprising:
The base station sends uplink authorization information to subscriber equipment (UE), the position of indication competitive resource and the send mode that sends upstream data on this competitive resource; UE as indicated send mode on the competitive resource of uplink authorization information indication sends upstream data; The base station is to UE echo reply message, indicates it whether successfully to receive data on the competitive resource; After UE receives response message, confirm that according to response message its upstream data on competitive resource sends successfully or fails.
Further, described base station one of in the following manner sends uplink authorization information to UE: the base station sends one or more uplink authorization information by the control signaling on the Physical Downlink Control Channel to a plurality of UE, and to indicate what carry in the control signaling with one or more resource identification informations be uplink authorization information; The base station places Physical Downlink Shared Channel to send described uplink authorization information, and on Physical Downlink Control Channel, send the control signaling carry downstream grants information, by what carry in the sign indication control signaling is the downstream grants information of having carried the MAC CE of uplink authorization information, described base station in MAC CE by one or more resource identification informations indicate carry among the MAC CE be uplink authorization information; At least comprise the frequency resource information of the position that is used to indicate competitive resource and the modulation coding information that is used to indicate send mode in each uplink authorization information.
Further, described base station comprises to the step of UE echo reply message: described base station sends response message with the time-frequency region of UE agreement to UE on down control channel, simultaneously, described base station is by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether described response message indication base station successfully receives upstream data; Perhaps described base station is only by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether the indication base station successfully receives upstream data.
Further, when described base station sends described response message by common signal channel, carry response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is used to identify this message and is the response message based on the transfer of data of competing.
Further, after the response message that described UE returns according to the base station confirms that upstream data sends failure, on the resource that the base station re-transmission is authorized, retransmit, perhaps on described competitive resource, retransmit.
Further, the re-transmission RNTI that is used to retransmit mandate is carried in described base station in uplink authorization information, when UE will retransmit, detect the control channel or the data channel that carry described re-transmission RNTI and obtain the re-transmission mandate, on described re-transmission resource, retransmit.
For solving the problems of the technologies described above, the present invention also provides a kind of transmitting uplink data system based on competition, comprising: base station and a plurality of subscriber equipment (UE), wherein:
Described base station is used for sending uplink authorization information to UE, the position of indication competitive resource and the send mode that sends upstream data on this competitive resource; And be used for to UE echo reply message, indicate it whether successfully to receive data on the competitive resource;
Described UE, the send mode that is used on the competitive resource of described uplink authorization information indication as indicated sends upstream data, and after being used to receive response message, confirms that according to response message its upstream data on competitive resource sends successfully or fails.
Further, the time-frequency region that described base station is further used for arranging with UE on down control channel sends response message to UE, simultaneously by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether described response message indication base station successfully receives upstream data.
Further, described base station only is further used for by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether the indication base station successfully receives upstream data.
Further, when described base station sends described response message by common signal channel, carry response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is used to identify this message and is the response message based on the transfer of data of competing.
Further, after the response message that described UE also is used for returning according to the base station confirms that upstream data sends failure, on the resource that the base station re-transmission is authorized, retransmit, perhaps on described competitive resource, retransmit.
Further, described base station is further used for carrying the re-transmission RNTI that is used to retransmit mandate in uplink authorization information; Described UE is further used in the time will retransmitting, and detects the control channel or the data channel that carry described re-transmission RNTI and obtains the re-transmission mandate, retransmits on described re-transmission resource.
The present invention with regard to CB transmission, retransmit, competition solves and proposes total solution, can save interface-free resources effectively, shortens the time delay that above-mentioned data send, and the retransmission scheme when having proposed the CB bust this has shortened the data transmission delay after the first biography failure.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the random access procedure flow chart based on conflict;
Fig. 2 is conflict free scheduling application process flow chart;
Fig. 3 is a pre-scheduling resource process flow chart
Fig. 4 is the transmission course flow chart based on conflict;
Fig. 5 is the graph of a relation of uplink authorization signaling and data;
Fig. 6 is the graph of a relation of downstream grants signaling and data;
Fig. 7 is the MAC CE form schematic diagram of competitive resource mandate;
Fig. 8 is a MAC PDU form schematic diagram;
Fig. 9 transmits for CB and CB replys flow chart;
Figure 10 retransmits flow chart for self adaptation;
Figure 11 retransmits flow chart for non-self-adapting.
Embodiment
Inventive concept of the present invention is: the base station sends uplink authorization information to UE, the position of indication competitive resource (promptly based on the transfer resource of competing) and the send mode that sends upstream data on this competitive resource; UE as indicated send mode on the competitive resource of uplink authorization information indication sends upstream data; The base station is to UE echo reply message, indicates it whether successfully to receive data on the competitive resource; After UE receives response message, confirm that according to response message its upstream data on competitive resource sends successfully or fails.
After adopting said method, UE can judge up CB transmission success or failure according to the response message that the base station sends, and when the UE upstream data sent successfully, UE can blindly not retransmit, thereby avoided eNB to receive the data that repeat, and had avoided the waste of resource yet; And when the UE upstream data sent failure, UE can carry out autotelic re-transmission, shortened the time delay that data send.
Above-mentioned uplink authorization information be the base station be UE distribute be the mandate of initial transmission, re-transmission for UE, the base station can initiatively be that UE distributes re-transmission authorization resources (explicit re-transmission mandate), make UE carry out adaptive re-transmission, perhaps UE can own configuration still adopts the resource (the re-transmission mandate of implicit expression) of initial transmission, carries out the re-transmission of non-self-adapting.
Said method specifically comprises the steps:
Step 1, network side sends the configuration that supplies the shared CB transfer resource of a plurality of UE by common signal channel, and the configuration of described CB transfer resource is designated hereinafter simply as uplink authorization information, comprises frequency resource information and modulation coding information at least in the described uplink authorization information;
Network side can also can be by the data channel mandate by the control channel mandate, specifically referring to follow-up 1.1 and the description of 1.2 parts.
Step 2, after UE received the uplink authorization information that network side sends, the modulation coding mode by its appointment on the indicated frequency resource of this uplink authorization information sent upstream data;
Concrete process of transmitting is referring to the description of 2 parts.
Step 3, network side send response message to UE on down control channel after receiving the upstream data that UE sends on the CB transfer resource, whether successfully receive above-mentioned CB transmission data to indicate it;
The mode of replying can have two kinds, and HARQ replys with non-HARQ and replys, specifically referring to the description of 3.1 and 3.2 parts.
Step 4, UE monitors and receives described response message on down control channel, confirm that according to response message data send successfully or fail, and determine whether to retransmit again.
Description referring to 4,5 parts.
Below each process of the present invention is specifically described:
1. initial authorization receives
1.1 by the control channel mandate
Step 111, eNB determines the configuration (being uplink authorization information) for the shared transfer resource of a plurality of UE;
Described uplink authorization information comprises at least: frequency resource information and modulation coding information, described frequency resource information is the information of CB transfer resource position, the send mode that described modulation coding information is used to indicate UE to adopt when this CB transfer resource sends data.For example, represent the frequency resource of distributing with resource blockassignment among the LTE; Modulation coding information is MCS information (modulation and coding scheme) among the LTE.
ENB can dispose a plurality of CB transfer resources on a TTI, that is to say, eNB can send a plurality of uplink authorization information to a plurality of UE simultaneously, each authorizes corresponding CB transfer resource, its benefit is to reduce the collision probability of single resource, and can satisfy different upstream data demands.
Step 112, Physical Downlink Control Channel (the PDCCH that eNB shifts to an earlier date in physical layer, Physicaldownlink control channel) going up by the PDCCH signaling is that DCI (Downlink ControlInformation, Downlink Control Information) sends uplink authorization (UL grant);
In the LTE system, eNB can shift to an earlier date n TTI (transmission time interval, Transmission Time Interval, the least unit of transmitting time) and send uplink authorization information, as shown in Figure 5.TTI is a subframe among the LTE, and length is 1ms.In the FDD system, n=4.In the TDD system, n depends on TDD configuration (configuration) and receives the subframe position of authorizing that the value of n is with reference to table 1.
The value of n in the table 1TDD system
Figure GSA00000021030700081
Described uplink authorization information identifies by a resource identification information, and promptly to be used for the content that indication signaling carries be uplink authorization information to this resource identification information.
ENB is during by the control channel mandate, above-mentioned resource identification information can be CB-RNTI (Contention based-Radio Network Temporary Identity, Radio Network Temporary Identifier based on competition), described CB-RNTI is that the mode by mask is carried on the CRC position of PDCCH, when UE detects on this PDCCH signaling sign and is CB-RNTI by blind check, think that then the content of carrying in this PDCCH signaling is the uplink authorization information of CB transfer resource.
Under the situation that sends a plurality of mandates simultaneously, CB-RNTI can be different, for example, 2 CB transfer resources are arranged, then can indicate with the PDCCH signaling of CB-RNTI1 and CB-RNTI2 sign respectively, the base station can be by configuration, and the indication different UEs is monitored different CB-RNTI, and uses different CB transfer resources.CB-RNTI can have a plurality of, can be that relevant UE is prenoticed by broadcasting or dedicated signaling in predefined fixedly reservation mode or base station.
Step 113, when UE need use the CB transfer resource, UE is eating dishes without rice or wine to receive the uplink authorization information that above-mentioned base station sends, and promptly detects the PDCCH signaling of carrying the required CB-RNTI sign of this UE in the PDCCH channel, therefrom obtains uplink authorization information.
1.2 by the data channel mandate
Another feasible mode is exactly by data channel transmission uplink authorization information, is example with the LTE system, and the base station may further comprise the steps by the process of the form transmission uplink authorization information of MAC CE (MAC control elements):
After step 121, base station are determined uplink authorization information, on PDCCH, send downstream grants information, be used to indicate UE to go up the uplink authorization information that receives, as shown in Figure 6 at PDSCH (Physical downlink shared channel, Physical Downlink Shared Channel);
The base station is the downstream grants information of MAC CE data by carry special identifier (for example CB-RNTI) in the PDCCH signaling with what indicate the last transmission of PDCCH, and this MAC CE is a special MAC CE, and this MAC CE is the MAC CE that has carried uplink authorization information.
The base station is carried the uplink authorization information of CB transmission at least in the MAC CE that PDSCH sends.
Step 122, UE receives the PDCCH signaling carry special identifier (CB-RNTI), therefrom obtains downstream grants information, receives MAC CE on the indicated PDSCH resource of this downstream grants information, as shown in Figure 7, from MAC CE, obtain the uplink authorization information of CB transmission;
The uplink authorization information of CB transmission should have one at least, also can comprise a plurality of.When carrying a plurality of uplink authorization information, MAC PDU can carry a plurality of MAC CE simultaneously, as shown in Figure 8, has carried MAC CE1 and MAC CE2, the authorization message of carrying a CB transfer resource among each MAC CE.
ENB is during by the data channel mandate, and resource identification information can adopt the CB resource identification, as CB-ID, is used for indexed resource.
2. initialization
After receiving mandate, as above-mentioned these 2 kinds of typical way, if UE need send upstream data, UE carries out data with the use authority resource and sends.For example in the LTE system, establish UE and receive uplink authorization information at x TTI, the process that UE sends upstream data comprises:
Step 211, the physical layer of UE is in the TTI collocating uplink mandate of this uplink authorization information correspondence;
Described collocating uplink mandate comprises: obtain the resource information in this uplink authorization information, promptly can send the TTI of upstream data, obtain the modulation coding information that sends upstream data, preferably, can also NDI (new data indicator be set at this TTI, new data flag) position indicates this TTI whether to be used for the initial transmission of data.
Obtain the mode of authorization message for above-mentioned by control channel, described TTI is x+n TTI, n=4 in LTE FDD system, and the value of n is referring to table 1 in the TDD system.
Obtain the mode of authorization message for above-mentioned by data channel since the processing time of data channel want for a long time than control channel, so described TTI is x+k TTI, k in the LTE system 〉=6.
Step 212, every through a TTI, whether UE detects this TTI is the TTI that has disposed uplink authorization, if UE sends upstream data at this TTI, otherwise continues current operation, waits for that next TTI arrival continues to detect.
UE is when sending upstream data, at least carry conflict and solve UE-ID, in LTE can be C-RNTI or other can be in the sub-district data that send of the ID and needing of unique identification UE, optionally, can carry other information relevant such as logic channel buffer information with this UE, in LTE BSR (buffer status report, buffer status report), ascending power information, in LTE PHR (power headroom report, power headroom reporting (PHR)) etc.
3. initialization is replied
The response message that the base station is returned to UE may comprise following two kinds of situations: the base station comprises HARQ response message and non-HARQ response message to the response message that UE sends; Perhaps the base station only comprises non-HARQ response message to the response message that UE sends.Respectively HARQ is replied to reply with non-HARQ below and describe.
3.1HARQ reply
Step 311, eNB receives the upstream data that UE sends at the CB transfer resource of configuration, and eNB sends response message with the time-frequency region of UE agreement to UE on down control channel, be used to indicate eNB whether successfully to receive above-mentioned CB transmission data;
Step 312, UE monitors and receives the response message that eNB sends on down control channel;
For example, in LTE FDD system, the base station can be in PHICH (Physical HARQ IndicatorCHannel, Physical HARQ Indicator Channel) y+4 TTI send ack or nack indication, y is that the subframe that the base station receives the UE data also is the subframe of UE uplink data sending.UE replys reception at y+4 TTI.In LTE TDD system, UE receives response message at y+k TTI, and k depends on the configuration of TDD and the subframe position of y, sees table 2 for details.
After UE receives ack, think that the upstream data in the CB transfer resource sends successfully, if when UE receives nack or confiscates any replying, then think to send failure.Preferably, carry out HARQ after the failure and retransmit, referring to 4.
The value of k in the table 2TDD system
Figure GSA00000021030700111
3.2 non-HARQ replys
No matter whether there is 3.1 HARQ to reply, can there be independently non-HARQ to reply, described non-HARQ replys, can be MAC (Media Access Control, the medium access control) layer message, RLC (control of Radio Link Control Radio Link) layer message or RRC (Radio ResourceControl, Radio Resource control) layer message.
Non-HARQ response message can with the CB transmitting synchronous, also can be asynchronous.Synchronous non-HARQ reply and CB transmission between because of satisfying sequential relationship, the TTI that promptly receives response message and CB transmission satisfies predefined time relationship, non-HARQ response message can receive in certain time (for example y+A TTI) behind the TTI of CB transmission, and perhaps certain period (for example y+A1 is in the y+A2 time) receives.Asynchronous replying then can be realized by the transmit timing device, UE is after sending the CB transmission, start timer, receive that in timer length response message then thinks the CB transmission success, if do not receive would think CB bust this, timer length can be acquiescence or by the base station by broadcasting or dedicated signaling notice.
Response message can send to UE by common signal channel or dedicated channel.When using common signal channel to send non-HARQ to reply, need at least in the described response message to carry and reply conflict and solve UE-ID, as shown in Figure 9.Because common signal channel has the data that a plurality of UE receive simultaneously, therefore will by carry UE-ID indicate should answer at UE.The mode of common employing acquiescence indication is promptly only carried in response message and being replied conflict solution UE-ID, represents that this UE upstream data sends successfully, also can carrying in response message be specifically designed to the flag bit of indicating success or not.
Specifically can send response message by public control channel or public data channel.
When adopting public control channel to send non-HARQ to reply, can identify that to indicate described message be response message by response RNTI, play the effect whether indication UE receives this message, for example: the R-CB-RNTI of special-purpose response, R-CB-RNTI information is the RNTI that is used to indicate response message, can predefine, also can prenotice, as together carrying when head teaches power information sending in the base station.Response RNTI also can authorize RNTI identical with re-transmission, and is promptly identical with the T-CB-RNTI that authorizes as re-transmission described in 5.1.Response RNTI also can use CB-RNTI.Adopt special-purpose R-CB-RNTI or T-CB-RNTI in response RNTI with respect to adopt CB-RNTI in response the advantage of RNTI be that UE can divide the signaling that sends initial authorization and reply authorization signaling by the tag slot, reduce UE and detect for the signaling of Common Control Channel.
When adopting public data channel to send non-HARQ to reply, data format can be MAC CE, carrying conflict and solving UE-ID.This common data sends by public control channel and authorizes, and can identify by above-mentioned response RNTI, and response RNTI can be the R-CB-RNTI or the T-CB-RNTI of above-mentioned CB-RNTI, special use at least.
When sending non-HARQ by dedicated channel and reply, it can be Dedicated Control Channel, perhaps dedicated data channel, be when replying with the difference of common channel by the dedicated channel transmission, can not carry conflict and solve UE-ID, wherein Dedicated Control Channel is promptly used the PDCCH signaling that C-RNTI replys for the sign expression, perhaps dedicated data channel, for example can be the MAC CE that the non-HARQ of expression replys, perhaps when the rlc layer AM of up CB The data pattern, by the RLC ack signaling of this packet or status report (status report) signaling of corresponding RLC, confirm that upstream data receives.
4.CB transmission success
When one of following situation occurring, UE thinks this CB transmission success:
1) successfully receives a upstream data mandate as UE by this UE sign (as C-RNTI) sign;
Usually UE can avoid UE to continue to use the CB resource to transmit for it distributes ascending resource after eNB successfully receives after through a CB transmission.Therefore after UE receives a upstream data mandate that is designated sign with it, think its CB transmission success before.
2) receive that 3.1 described HARQ reply;
3) 3.2 described non-HARQ reply.
Optionally, when UE thinks the CB transmission success, and UE carrying out 5 described retransmission processes, can stop this process, empties the corresponding authorization message buffer memory relevant with HARQ.
5.HARQ retransmit
Behind above-mentioned 3.1 procedure failures, optionally can carry out HARQ and retransmit.Before carrying out the HARQ re-transmission, UE needs to obtain earlier to retransmit mandate, promptly needs to know again the resource location and the send mode of transmit ascending data.
Authorize 5.1. retransmit
Retransmit to authorize adopt the control channel mandate, its signaling sign adopts and retransmits RNTI, can use the CB-RNTI identical with initial transmission, and distinguishes the initial transmission mandate by indicating with the different NDI described in 2 in the authorization signaling.Perhaps use the RNTI different to identify, retransmit RNTI in this article and represent with T-CB-RNTI with initial transmission.The benefit of using the RNTI different with initial transmission be UE pass through that this sign can retransmit be authorized and the initial transmission empowered zone separately, thereby reduce the conflict that retransmits UE and initial transmission UE and unnecessary signaling reception.
T-CB-RNTI information can be provided with by the mode of predefine or broadcasting, also can teach in the power and carry together to UE with initial authorization at head, promptly the content as the initial uplink authorization message sends to UE, when UE will retransmit, control channel or data channel that this re-transmission RNTI is carried in detection obtain re-transmission mandate (identical with the uplink authorization message form that sends first), retransmit on described re-transmission resource.The value of T-CB-RNTI can be provided with flexibly.When the 1.1 described modes of employing sent initial authorization, T-CB-RNTI information was carried by the PDCCH signaling.When sending initial authorization by 1.2 described modes, T-CB-RNTI carries by MAC CE.
Wherein T-CB-RNTI information can be the value of T-CB-RNTI, perhaps the index of T-CB-RNTI.If the T-CB-RNTI index, UE obtains the value of T-CB-RNTI by searching the T-CB-RNTI table after obtaining index.Can shorten the bit position that T-CB-RNTI accounts for by indexed mode, reduce the expense in signaling, its index relative is prenoticed UE by predefine or broadcast mode.For example, the low 4bit that uses T-CB-RNTI is as index, and the high 12bit completion that UE will be known in advance can be formed complete T-CB-RNTI, and high 12bit UE can obtain by the mode of predefine or broadcasting or dedicated signaling.
T-CB-RNTI information also can be carried in initialization is replied, and carries in replying as the failure of 3.2 described non-HARQ to retransmit RNTI with indication UE re-transmission, and this moment, response message can not adopt T-CB-RNTI to be used as replying RNTI.
5.2. retransmit
After UE obtains explicit re-transmission mandate, promptly receive with after retransmitting the re-transmission mandate PDCCH signaling of RNTI sign described in 5.1, when needs retransmit, authorize indicated frequency resource and modulating-coding form to carry out the self adaptation re-transmission according to retransmitting, as shown in figure 10.UE is provided with flag bit with notice eNB this data transfer biography of attaching most importance to, and is the non-state of having put by NDI is set for example.UE can also carry out non-self-adapting and retransmit, and for example after initial transmission, in the individual TTI of RTT (RTT is 8 in LTE FDD system), UE does not still receive the ack indication of HARQ, and UE can retransmit on the running time-frequency resource of initial transmission indication, as shown in figure 11.Network can use 3 described response modes equally for re-transmission, and re-transmission is replied.
6.CB bust this is handled
When UE can't satisfy the success conditions described in 4 at the appointed time, then think this CB transmission course failure.UE can restart once new CB transmission course.
Realize that system for carrying out said process comprises base station and a plurality of UE, wherein:
Described base station is used for sending uplink authorization information to UE, the position of indication competitive resource and the send mode that sends upstream data on this competitive resource; And be used for to UE echo reply message, indicate it whether successfully to receive data on the competitive resource;
Described UE, the send mode that is used on the competitive resource of described uplink authorization information indication as indicated sends upstream data, and after being used to receive response message, confirms that according to response message its upstream data on competitive resource sends successfully or fails.
Preferably, the time-frequency region that described base station is further used for arranging with UE on down control channel sends response message to UE, simultaneously by MAC message, or RLC message, or RRC message sends response message to UE, and whether described response message indication base station successfully receives upstream data.
Preferably, described base station only is further used for by MAC message, or RLC message, or RRC message sends response message to UE, and whether the indication base station successfully receives upstream data.
Preferably, when described base station sends described response message by common signal channel, carry response RNTI in described response message, described response RNTI is used to identify this message and is the response message based on the transfer of data of competing.
Preferably, after the response message that described UE also is used for returning according to the base station confirms that upstream data sends failure, on the resource that the base station re-transmission is authorized, retransmit, perhaps on described competitive resource, retransmit.
Preferably, described base station is further used for carrying the re-transmission RNTI that is used to retransmit mandate in uplink authorization information; Described UE is further used in the time will retransmitting, and detects the control channel or the data channel that carry described re-transmission RNTI and obtains the re-transmission mandate, retransmits on described re-transmission resource.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (12)

  1. One kind based on the competition uplink data transmission method, comprising:
    The base station sends uplink authorization information to subscriber equipment (UE), the position of indication competitive resource and the send mode that sends upstream data on this competitive resource; UE as indicated send mode on the competitive resource of uplink authorization information indication sends upstream data; The base station is to UE echo reply message, indicates it whether successfully to receive data on the competitive resource; After UE receives response message, confirm that according to response message its upstream data on competitive resource sends successfully or fails.
  2. 2. the method for claim 1 is characterized in that,
    Described base station one of in the following manner sends uplink authorization information to UE:
    The base station sends one or more uplink authorization information by the control signaling on the Physical Downlink Control Channel to a plurality of UE, and is uplink authorization information with what one or more resource identification informations indicated that control carries in the signaling;
    The base station places Physical Downlink Shared Channel to send described uplink authorization information, and on Physical Downlink Control Channel, send the control signaling carry downstream grants information, by what carry in the sign indication control signaling is the downstream grants information of having carried the MAC CE of uplink authorization information, described base station in MACCE by one or more resource identification informations indicate carry among the MAC CE be uplink authorization information;
    At least comprise the frequency resource information of the position that is used to indicate competitive resource and the modulation coding information that is used to indicate send mode in each uplink authorization information.
  3. 3. the method for claim 1 is characterized in that,
    Described base station comprises to the step of UE echo reply message:
    Described base station sends response message with the time-frequency region of UE agreement to UE on down control channel, simultaneously, described base station is by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether described response message indication base station successfully receives upstream data; Perhaps
    Described base station is only by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether the indication base station successfully receives upstream data.
  4. 4. method as claimed in claim 3 is characterized in that,
    When described base station sends described response message by common signal channel, carry response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is used to identify this message and is the response message based on the transfer of data of competing.
  5. 5. the method for claim 1 is characterized in that,
    After the response message that described UE returns according to the base station confirms that upstream data sends failure, on the resource that the base station re-transmission is authorized, retransmit, perhaps on described competitive resource, retransmit.
  6. 6. method as claimed in claim 5 is characterized in that,
    The re-transmission RNTI that is used to retransmit mandate is carried in described base station in uplink authorization information, when UE will retransmit, detect the control channel or the data channel that carry described re-transmission RNTI and obtain the re-transmission mandate, retransmits on described re-transmission resource.
  7. One kind based on the competition the transmitting uplink data system, comprising: base station and a plurality of subscriber equipment (UE), wherein:
    Described base station is used for sending uplink authorization information to UE, the position of indication competitive resource and the send mode that sends upstream data on this competitive resource; And be used for to UE echo reply message, indicate it whether successfully to receive data on the competitive resource;
    Described UE, the send mode that is used on the competitive resource of described uplink authorization information indication as indicated sends upstream data, and after being used to receive response message, confirms that according to response message its upstream data on competitive resource sends successfully or fails.
  8. 8. system as claimed in claim 7 is characterized in that,
    The time-frequency region that described base station is further used for arranging with UE on down control channel sends response message to UE, simultaneously by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether described response message indication base station successfully receives upstream data.
  9. 9. system as claimed in claim 7 is characterized in that,
    Described base station only is further used for by medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, and whether the indication base station successfully receives upstream data.
  10. 10. system as claimed in claim 8 or 9 is characterized in that,
    When described base station sends described response message by common signal channel, carry response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is used to identify this message and is the response message based on the transfer of data of competing.
  11. 11. system as claimed in claim 7 is characterized in that,
    After the response message that described UE also is used for returning according to the base station confirms that upstream data sends failure, on the resource that the base station re-transmission is authorized, retransmit, perhaps on described competitive resource, retransmit.
  12. 12. system as claimed in claim 11 is characterized in that,
    Described base station is further used for carrying the re-transmission RNTI that is used to retransmit mandate in uplink authorization information;
    Described UE is further used in the time will retransmitting, and detects the control channel or the data channel that carry described re-transmission RNTI and obtains the re-transmission mandate, retransmits on described re-transmission resource.
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