CN102158981B - A kind of uplink data transmission method based on competition and system - Google Patents
A kind of uplink data transmission method based on competition and system Download PDFInfo
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Abstract
The invention discloses a kind of uplink data transmission method based on competition and system, it is to avoid the wasting of resources, shorten the time delay that data send。Described uplink data transmission method includes: base station sends uplink authorization information to subscriber equipment (UE), indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；UE transmission mode as indicated on the competitive resource that uplink authorization information indicates sends upstream data；Base station returns response message to UE, indicates its data whether being properly received on competitive resource；After UE receives response message, send success or failure according to its upstream data on competitive resource of response message authentication。
Description
Technical field
The present invention relates to wireless communication field, be specifically related to a kind of uplink data transmission method based on competition and system。
Background technology
In a wireless communication system, subscriber equipment (UserEquipment, UE) is in the starting stage of transmission data, it usually needs utilize the resource of competition (Contention)。This mainly has two kinds of scenes: one is to carry out Stochastic accessing when UE first time is linked into network, another kind of situation is when UE is after accessing network, the gap process of data can enter resting state (dormant), the resource overhead of battery consumption and network to save UE, network can not be reserved resource to UE or only reserve little resource, when sending when there being upstream data to need, UE is by Stochastic accessing or by reserved minor resource, network is signaled, to obtain follow-up uplink transmission resource as special signaling channel sends。
Random access procedure, with LTE (LongTermEvolution, 3GPP Long Term Evolution) system is example, the same with most of cellular communication systems, Stochastic accessing divides 4 steps, as shown in Figure 1, first UE initiates Stochastic accessing pilot tone (RandomAccessPreamble), network receives and sends accidental access response (RandomAccessResponse) after successfully, UE is allowed to adjust up transmission in advance, then in the resource of the transmission MSG3 (message 3 in figure) specified, send the data of competition, in LTE, the resource of this transmission MSG3 is the shared resource of dynamic dispatching, so with other cellular system before in be also referred to as RACH (RadomAccessChannel, RACH) channel resource fixed configurations difference, the resource of LTE is to be indicated by the uplink authorization (ULgrant) carried in accidental access response。UE can carry the data to transmit in MSG3, and Conflict solving mark (UEcontentionresolutionID), after network side receives, reply MSG4 (contention resolved), carrying the contention resolved mark of correspondence, UE thinks contention resolved after receiving。
Method for another reserve dedicated resources, it is also called scheduling application process, different from Stochastic accessing, it is only used for connected state UE, as in figure 2 it is shown, after UE completes connection, during being in business gap, one special ascending control channel of network reservation, to UE, discharges other physical channel resources。When UE needs uplink data sending, it is possible to send dispatch request (SchedulingRequest, SR) on special ascending control channel。Network just can send schedule information (SRgrant, dispatch request mandate) to UE after receiving, then UE just can carry out transmitting uplink data in the resource of scheduling。
Comparison diagram 1 and Fig. 2 it can be seen that, 3rd article of message of two flow processs, the upstream data of UE can be sent to base station, the message 1 and 2 of the random access procedure shown in the distinguishing Fig. 1 of being is a process based on competition, the resource that so-called competition and message 1 send is that multiple UE shares, so being likely to transmission message 1 simultaneously at the multiple UE of synchronization, cause that the reception of message 1 is likely to unsuccessfully by base station。Scheduling application shown in Fig. 2 is a kind of non-competing process substantially, and its up channel sending SR is UE private resource, will not clash, so relative says, ordinary circumstance dispatching application process sends data can be faster than random access procedure。
Two kinds of above-mentioned upstream datas send process, although it is otherwise varied in principle, but in transmission process, when UE needs uplink data sending, first a request (MSG1) is sent, then after the response of base station (MSG2), UE could real uplink data sending (MSG3)。Because of above 2 steps, causing that UE has a time delay to when really sending when arriving from upstream data, Stochastic accessing MSG1 may conflict, if conflict, it is necessary to restart another Stochastic accessing and can cause that time delay is longer。In LTE system, the time delay of scheduling application process generally has 11.5ms。
Some small data quantities, short time-delay business (such as game service) above-mentioned time delay is especially sensitive, in order to reduce above-mentioned time delay, scheme is had to adopt the mode of pre-scheduling resource, namely no matter whether UE has data to network, always one special data channel of distribution is to UE, when UE needs uplink data sending, just can send data in this dedicated data channel, as it is shown on figure 3, UE MSG1 just can uplink data sending, its transmission delay can reduce to 5.5ms in LTE system。The shortcoming of this scheme is that base station needs reserved a part of private resource to UE, and no matter whether UE has transmitting uplink data, so the waste of resource can be caused。
In order to avoid the above-mentioned wasting of resources, above-mentioned dedicated data channel can be changed into competition data channel, realize the transmission (Contentionbasedtransmission based on competition, CB transmits), ascending resource is shared in several UE, when UE needs to use, data are sent by competing, as shown in Figure 4, when shared UE number is less, it is possible to obtain good performance。
Although giving the up CB preparative course of transmission in prior art, but not yet having complete scheme to solve to propose, occurring for conflict, the abnormality processing flow process such as data transmission fault is also without perfect processing procedure。
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of uplink data transmission method based on competition and system, it is to avoid the wasting of resources, shortens the time delay that data send。
For solving above-mentioned technical problem, the invention provides a kind of uplink data transmission method based on competition, including:
Base station sends uplink authorization information to subscriber equipment (UE), indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；UE transmission mode as indicated on the competitive resource that uplink authorization information indicates sends upstream data；Base station returns response message to UE, indicates its data whether being properly received on competitive resource；After UE receives response message, send success or failure according to its upstream data on competitive resource of response message authentication。
Further, described base station one of in the following manner sends uplink authorization information to UE: base station sends one or more uplink authorization information by the control signaling on Physical Downlink Control Channel to multiple UE, and indicate with one or more resource identification informations control signaling is carried for uplink authorization information；Described uplink authorization information is placed in Physical Downlink Shared Channel and sends by base station, and on Physical Downlink Control Channel, send the control signaling carrying downstream grants information, what control to carry in signaling by a mark instruction is the downstream grants information of the MACCE carrying uplink authorization information, described base station indicated by one or more resource identification informations in MACCE MACCE carries for uplink authorization information；Each uplink authorization information at least includes for indicating the frequency resource information of the position of competitive resource and for indicating the modulation coding information of transmission mode。
Further, described base station includes to the UE step returning response message: described base station sends response message with the time-frequency region of UE agreement to UE on down control channel, simultaneously, Medium Access Layer (MAC) message is passed through in described base station, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message sends response message to UE, whether described response message instruction base station is properly received upstream data；Or 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, whether instruction base station is properly received upstream data。
Further, when described base station sends described response message by common signal channel, carrying response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is for identifying the response message that this message is the data transmission based on competition。
Further, the response message authentication upstream data that described UE returns according to base station sends after unsuccessfully, retransmits in base station in the resource authorized and retransmits, or retransmits on described competitive resource。
Further, described base station is carried for carrying out retransmitting the re-transmission RNTI authorized in uplink authorization information, when UE to retransmit, detects the control channel carrying the described RNTI of re-transmission or data channel obtains to retransmit and authorizes, retransmit on described retransmission resource。
For solving above-mentioned technical problem, present invention also offers a kind of transmitting uplink data system based on competition, including: base station and multiple subscriber equipment (UE), wherein:
Described base station, for sending uplink authorization information to UE, indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；And for returning response message to UE, indicate its data whether being properly received on competitive resource；
Described UE, sends upstream data for transmission mode as indicated on the competitive resource that described uplink authorization information indicates, and after being used for receiving response message, sends success or failure according to its upstream data on competitive resource of response message authentication。
Further, described base station is further used on down control channel and the UE time-frequency region arranged 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, whether described response message instruction base station is properly received upstream data。
Further, described base station is further used for only by Medium Access Layer (MAC) message, or wireless chain control layer (RLC) message, or radio resource control layer (RRC) message is to UE transmission response message, and whether instruction base station is properly received upstream data。
Further, when described base station sends described response message by common signal channel, carrying response Radio Network Temporary Identifier (RNTI) in described response message, described response RNTI is for identifying the response message that this message is the data transmission based on competition。
Further, the response message authentication upstream data that described UE is additionally operable to according to base station returns sends after unsuccessfully, retransmits in base station in the resource authorized and retransmits, or retransmits on described competitive resource。
Further, described base station is further used for carrying in uplink authorization information for carrying out retransmitting the re-transmission RNTI authorized；Described UE is further used for when to retransmit, and the described control channel retransmitting RNTI or data channel acquisition re-transmission mandate are carried in detection, retransmit on described retransmission resource。
The present invention is transmitted with regard to CB, is retransmitted, contention resolved proposes total solution, it is possible to effectively saves interface-free resources, shortens the time delay that above-mentioned data send retransmission scheme when proposing CB bust this, shortens and first passes the data transmission delay after unsuccessfully。
Accompanying drawing explanation
Accompanying drawing is for providing a further understanding of the present invention, and constitutes a part for description, is used for together with embodiments of the present invention explaining the present invention, is not intended that limitation of the present 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 pre-scheduling resource process flow chart
Fig. 4 is the transmitting procedure 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 MACCE form schematic diagram of competitive resource mandate；
Fig. 8 is MACPDU form schematic diagram；
Fig. 9 is CB transmission and CB response flow chart；
Figure 10 is adaptive retransmission flow chart；
Figure 11 is that non-self-adapting retransmits flow chart。
Detailed description of the invention
The inventive concept of the present invention is: base station sends uplink authorization information to UE, indicates the position of competitive resource (namely based on the transfer resource of competition) and sends the transmission mode of upstream data on this competitive resource；UE transmission mode as indicated on the competitive resource that uplink authorization information indicates sends upstream data；Base station returns response message to UE, indicates its data whether being properly received on competitive resource；After UE receives response message, send success or failure according to its upstream data on competitive resource of response message authentication。
After adopting said method, UE can judge up CB transmission success or failure according to the response message that base station sends, and when UE upstream data sends successfully, UE will not retransmit by carrying out blindly, thus avoiding eNB to receive the data repeated, it also avoid the waste of resource；And when UE upstream data sends unsuccessfully, UE can carry out autotelic re-transmission, shorten the time delay that data send。
Above-mentioned uplink authorization information is base station is the UE mandate for initial transmission distributed, re-transmission for UE, base station can be actively that UE distribution retransmits authorization resources (explicit re-transmission mandate), UE is made to carry out adaptive re-transmission, or UE oneself can configure the resource (the re-transmission mandate of implicit expression) still adopting initial transmission, carries out the re-transmission of non-self-adapting。
Said method specifically includes following steps:
Step one, network side sends the configuration for multiple UE CB transfer resource shared by common signal channel, and the configuration of described CB transfer resource, hereinafter referred to as uplink authorization information, at least includes frequency resource information and modulation coding information in described uplink authorization information；
Network side can pass through to control channel authorization can also pass through data channel mandate, referring specifically to the description of follow-up 1.1 and 1.2 parts。
Step 2, after UE receives the uplink authorization information that network side sends, sends upstream data by its modulation coding mode specified in the frequency resource indicated by this uplink authorization information；
Concrete transmission process is referring to the description of 2 parts。
Step 3, network side sends response message to UE after receiving the UE upstream data sent on CB transfer resource on down control channel, transmits data to indicate it whether to be properly received above-mentioned CB；
The mode of response can have two kinds, HARQ response and non-HARQ response, referring specifically to the description of 3.1 and 3.2 parts。
Step 4, UE monitors on down control channel and receives described response message, sends success or failure according to response message authentication data, then determines whether to retransmit。
Description referring to 4,5 parts。
Below each process of the present invention is specifically described:
1. initial authorization receives
1.1 by controlling channel authorization
Step 111, eNB determines the configuration (i.e. uplink authorization information) for multiple UE transfer resource shared；
Described uplink authorization information at least includes: frequency resource information and modulation coding information, and described frequency resource information is the information of CB transfer resource position, and described modulation coding information is for indicating the UE transmission mode adopted when this CB transfer resource sends data。Such as, LTE represents the frequency resource of distribution with resourceblockassignment；In LTE, modulation coding information is MCS information (modulationandcodingscheme)。
ENB can configure multiple CB transfer resource on a TTI, it is to say, eNB can send multiple uplink authorization information to multiple UE simultaneously, the corresponding CB transfer resource of each mandate, its benefit is to reduce the collision probability of single resource, and can meet different upstream data demands。
Step 112, eNB is in advance at the Physical Downlink Control Channel (PDCCH of physical layer, Physicaldownlinkcontrolchannel) uplink authorization (ULgrant) is sent by PDCCH signaling and DCI (DownlinkControlInformation, Downlink Control Information) on；
In LTE system, eNB can shift to an earlier date n TTI (transmissiontimeinterval, Transmission Time Interval send the least unit of time) and send uplink authorization information, as shown in Figure 5。In LTE, TTI is a subframe, and length is 1ms。In FDD system, n=4。In a tdd system, n depends on TDDconfiguration (configuration) and receives the subframe position authorized, and the value of n is with reference to table 1。
The value of n in table 1TDD system
Described uplink authorization information is identified by a resource identification information, and namely this resource identification information is uplink authorization information for the content carried in indication signaling。
When eNB is by controlling channel authorization, above-mentioned resource identification information can be CB-RNTI (Contentionbased-RadioNetworkTemporaryIdentity, Radio Network Temporary Identifier based on competition), described CB-RNTI is that the mode by mask is carried on the CRC bit of PDCCH, when by blind check, UE detects that in this PDCCH signaling, mark is CB-RNTI, then it is assumed that the uplink authorization information that content is CB transfer resource carried in this PDCCH signaling。
When sending multiple mandate simultaneously, CB-RNTI can be different, such as, there are 2 CB transfer resources, then can respectively with the PDCCH signaling instruction of CB-RNTI1 and CB-RNTI2 mark, base station can be passed through to configure, and the different UE of instruction monitors different CB-RNTI, and uses different CB transfer resources。CB-RNTI can have multiple, it is possible to is predefined fixing reservation mode or base station by broadcasting or dedicated signaling prenotices relevant UE。
Step 113, when UE needs to use CB transfer resource, UE is eating dishes without rice or wine to receive the uplink authorization information of above-mentioned base station transmission, namely detects the PDCCH signaling that needed for carrying this UE, CB-RNTI identifies in PDCCH channel, therefrom obtains uplink authorization information。
1.2 pass through data channel mandate
Another feasible mode is through data channel transmission uplink authorization information, and for LTE system, the process that base station sends uplink authorization information by the form of MACCE (MACcontrolelements) comprises the following steps:
Step 121, after uplink authorization information is determined in base station, sends downstream grants information on PDCCH, is used for indicating UE to receive uplink authorization information on PDSCH (Physicaldownlinksharedchannel, Physical Downlink Shared Channel), as shown in Figure 6；
Base station by carrying special identifier (such as CB-RNTI) to indicate the downstream grants information for MACCE data sent on PDCCH in PDCCH signaling, and this MACCE be a special MACCE, this MACCE is the MACCE carrying uplink authorization information。
The uplink authorization information of CB transmission is at least carried in base station in the PDSCH MACCE sent。
Step 122, UE receives the PDCCH signaling carrying special identifier (CB-RNTI), therefrom obtains downstream grants information, receives MACCE in the PDSCH resource indicated by this downstream grants information, as it is shown in fig. 7, obtain the uplink authorization information of CB transmission from MACCE；
The uplink authorization information of CB transmission at least should have one, it is also possible to comprises multiple。When carrying multiple uplink authorization information, MACPDU can carry multiple MACCE simultaneously, as shown in Figure 8, carries MACCE1 and MACCE2, carries the authorization message of a CB transfer resource in each MACCE。
When eNB is by data channel mandate, resource identification information can adopt CB resource identification, such as CB-ID, for indexed resource。
2. initially send
After receiving mandate, such as these 2 kinds of typical way above-mentioned, if UE needs to send upstream data, use authority resource is carried out data transmission by UE。Such as in LTE system, if UE receives uplink authorization information at x-th TTI, UE sends the process of upstream data and includes:
Step 211, the physical layer of UE is in TTI collocating uplink mandate corresponding to this uplink authorization information；
Described collocating uplink mandate includes: obtain the resource information in this uplink authorization information, namely the TTI of upstream data can be sent, obtain the modulation coding information sending upstream data, preferably, NDI (newdataindicator can also be set at this TTI, new data flag) position, indicate this TTI whether for the initial transmission of data。
For above by the mode controlling channel acquisition authorization message, described TTI is xth+n TTI, n=4 in LTEFDD system, and the value of n is referring to table 1 in a tdd system。
For obtaining the mode of authorization message above by data channel, want for a long time owing to the process time of data channel relatively controls channel, so described TTI is xth+k TTI, k >=6 in LTE system。
Through TTI, a UE, step 212, often detects whether this TTI is the TTI being configured with uplink authorization, if it is, UE sends upstream data at this TTI, otherwise continue current operation, waits that next TTI arrives and continues detection。
UE is when sending upstream data, at least carry Conflict solving UE-ID, LTE can be C-RNTI or other can uniquely identify the ID of UE in community, and need the data sent, optionally, other information relevant to this UE such as logic channel buffer information can be carried, LTE is BSR (bufferstatusreport, buffer status report), ascending power information, LTE is PHR (powerheadroomreport, power headroom reporting (PHR)) etc.。
3. initially send response
Base station potentially includes following two situation to the UE response message returned: base station includes HARQ response message and non-HARQ response message to the UE response message sent；Or base station only includes non-HARQ response message to the UE response message sent。Separately below HARQ response and non-HARQ response are illustrated。
3.1HARQ response
Step 311, eNB receives the UE upstream data sent 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, transmits data for indicating eNB whether to be properly received above-mentioned CB；
Step 312, UE monitors and receives the eNB response message sent on down control channel；
Such as, in LTEFDD system, base station can send ack or nack instruction by the y+4 TTI in PHICH (PhysicalHARQIndicatorCHannel, Physical HARQ Indicator Channel), and y is that base station receives the subframe of UE data namely the subframe of UE uplink data sending。UE carries out response reception at the y+4 TTI。In LTE TDD system, UE receives response message at the y+k TTI, and k depends on the configuration of TDD and the subframe position of y, refers to table 2。
After UE receives ack, it is believed that the upstream data in CB transfer resource sends successfully, if UE receives nack or confiscates any response, then it is assumed that send unsuccessfully。Preferably, HARQ re-transmission is carried out after failure, referring to 4。
The value of k in table 2TDD system
3.2 non-HARQ responses
Regardless of whether there is the HARQ response of 3.1, can there is independent non-HARQ response, described non-HARQ response, can be MAC (MediaAccessControl, medium education) layer message, RLC (RadioLinkControl wireless spread-spectrum technology) layer message or RRC (RadioResourceControl, wireless heterogeneous networks) layer message。
Non-HARQ response message can synchronize with CB transmission, it is also possible to is asynchronous。Synchronize between non-HARQ response and CB transmission because meeting sequential relationship, namely the TTI receiving response message and CB transmission meets predefined time relationship, non-HARQ response message can receive in certain time (such as the y+A TTI) after the TTI of CB transmission, or certain period (such as in y+A1 to the y+A2 time) receives。Asynchronous response then can be passed through to transmit intervalometer and realize, UE is after sending CB transmission, start intervalometer, in timer length, receive response message then think CB transmission success, without receiving, think that CB bust this, timer length can be acquiescence or be notified by broadcast or dedicated signaling by base station。
Response message can be sent to UE by common signal channel or dedicated channel。When using common signal channel to send non-HARQ response, described response message at least needs carry response Conflict solving UE-ID, as shown in Figure 9。Owing to common signal channel is likely to there are multiple UE data received simultaneously, therefore will pass through carry UE-ID indicate should answer for UE。Generally adopt the mode of acquiescence instruction, in response message, namely only carry response Conflict solving UE-ID, represent that this UE upstream data sends successfully, it is also possible to carrying in response message is specifically designed to the flag bit of instruction success or not。
Specifically can control channel or public data channel transmission response message by public。
When adopting public control channel to send non-HARQ response, can indicate described message by response RNTI mark is response message, play whether instruction UE receives the effect of this message, such as: the R-CB-RNTI of special response, R-CB-RNTI information is indicated for the RNTI of response message, can predefine, it is also possible to prenotice, as in base station send head pass authorization message time carried along。Response RNTI can also authorize RNTI identical with retransmitting, and it is identical that being used as described in namely with 5.1 retransmits the T-CB-RNTI authorized。Response RNTI can also use CB-RNTI。Adopting special R-CB-RNTI or T-CB-RNTI to be in that UE can pass through tag slot distribution and send signaling and the response authorization signaling of initial authorization as the advantage responding RNTI relative to adopting CB-RNTI as response RNTI, minimizing UE detects for the signaling of CCCH。
When adopting public data channel to send non-HARQ response, data form can be MACCE, carries Conflict solving UE-ID。This common data is sent by public control channel and authorizes, it is possible to identified by above-mentioned response RNTI, and response RNTI can be at least above-mentioned CB-RNTI, special R-CB-RNTI or T-CB-RNTI。
When sending non-HARQ response by dedicated channel, it can be DCCH, or dedicated data channel, it is distinctive in that when sending response by dedicated channel with common channel, Conflict solving UE-ID can not be carried, wherein namely DCCH uses C-RNTI to be the PDCCH signaling that mark represents response, or dedicated data channel, such as can indicate that the MACCE of non-HARQ response, or when the rlc layer AM pattern of up CB data acquisition, statusreport (state report) signaling by the RLCack signaling of this packet or corresponding RLC, confirm that upstream data is received。
4.CB transmission success
Occurring that situations below is for the moment, UE thinks this CB transmission success:
1) identified, when UE has successfully received one, the upstream data mandate that (such as C-RNTI) identifies by this UE；
Usual UE is after a CB transmission, and eNB for its distribution ascending resource, can avoid UE to be continuing with CB resource and be transmitted after being properly received。Therefore after UE receives a upstream data mandate being designated mark with it, it is believed that the CB transmission success before it。
2) the HARQ response described in 3.1 is received；
3) the non-HARQ response described in 3.2。
Optionally, when UE thinks CB transmission success, and UE is carrying out the retransmission processes described in 5, it is possible to stop this process, empties the buffer memory that the authorization message of correspondence is relevant with HARQ。
5.HARQ retransmits
When, after above-mentioned 3.1 procedure failures, optionally carrying out HARQ re-transmission。Before carrying out HARQ re-transmission, UE needs first to obtain to retransmit to authorize, and namely needs to know the resource location again transmitting upstream data and transmission mode。
5.1. mandate is retransmitted
Retransmitting to authorize to adopt and control channel authorization, its signaling mark adopts and retransmits RNTI, it is possible to use the CB-RNTI identical with initial transmission, and distinguishes initial transmission mandate by NDI instructions different from described in 2 in authorization signaling。Or use the RNTI different with initial transmission to be identified, retransmit RNTI T-CB-RNTI in this article and represent。Use the benefit of the RNTI different with initial transmission be UE pass through this mark can retransmit authorize and initial transmission empowered zone separately, thus reducing the conflict retransmitting UE and initial transmission UE and unnecessary signaling receives。
T-CB-RNTI information can be arranged by predefined or broadcast mode, can also teach at head and power is carried to UE together with initial authorization, namely the content as initial uplink authorization message is sent to UE, when UE to retransmit, control channel or data channel acquisition re-transmission mandate (identical with the uplink authorization information form sent first) of this re-transmission RNTI is carried in detection, retransmits on described retransmission resource。The value of T-CB-RNTI can be arranged flexibly。When adopting the mode described in 1.1 to send initial authorization, T-CB-RNTI information is carried by PDCCH signaling。When sending initial authorization by the mode described in 1.2, T-CB-RNTI is carried by MACCE。
Wherein T-CB-RNTI information can be the value of T-CB-RNTI, or the index of T-CB-RNTI。If T-CB-RNTI index, UE, after obtaining index, obtains the value of T-CB-RNTI by searching T-CB-RNTI table。Can shortening the T-CB-RNTI bit position accounted for by indexed mode, reduce expense in the signaling, its index relative prenotices UE by predefined or broadcast mode。Such as, using the low 4bit of T-CB-RNTI as index, the high 12bit completion known in advance can be formed complete T-CB-RNTI, high 12bitUE and can be obtained by predefined or broadcast or dedicated signaling mode by UE。
T-CB-RNTI information can also be carried initial transmission in response, carries re-transmission RNTI to indicate UE to retransmit, now reply message and T-CB-RNTI can not be adopted to be used as response RNTI in the failed response of the non-HARQ as described in 3.2。
5.2. retransmit
After UE obtains explicit re-transmission mandate, after namely receiving the re-transmission mandate PDCCH signaling to retransmit RNTI mark described in 5.1, when needs retransmit, indicated frequency resource and modulating-coding form is authorized to carry out adaptive retransmission according to retransmitting, as shown in Figure 10。UE arranges flag bit to notify that this secondary data of eNB is transmitted as re-transmission, for instance non-put state by arranging NDI。UE can also carry out non-self-adapting re-transmission, such as when, after initial transmission, in RTT (RTT is 8 in LTEFDD system) individual TTI, UE remains without the ack instruction receiving HARQ, UE can retransmit on the running time-frequency resource of initial transmission instruction, as shown in figure 11。Network is for retransmitting, it is possible to using the response mode described in 3 equally, counterweight comes into row response。
6.CB bust this processes
When UE cannot meet the success conditions described in 4 at the appointed time, then it is assumed that this CB transmitting procedure failure。UE can restart once new CB transmitting procedure。
The system realizing said method includes base station and multiple UE, wherein:
Described base station, for sending uplink authorization information to UE, indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；And for returning response message to UE, indicate its data whether being properly received on competitive resource；
Described UE, sends upstream data for transmission mode as indicated on the competitive resource that described uplink authorization information indicates, and after being used for receiving response message, sends success or failure according to its upstream data on competitive resource of response message authentication。
Preferably, described base station is further used on down control channel and the UE time-frequency region arranged sends response message to UE, simultaneously by MAC message, or RLC message, or RRC information sends response message to UE, whether described response message instruction base station is properly received upstream data。
Preferably, described base station is further used for only by MAC message, or RLC message, or RRC information sends response message to UE, and whether instruction base station is properly received upstream data。
Preferably, when described base station sends described response message by common signal channel, described response message is carried response RNTI, described response RNTI for identifying the response message that this message is the data transmission based on competition。
Preferably, the response message authentication upstream data that described UE is additionally operable to according to base station returns sends after unsuccessfully, retransmits in base station in the resource authorized and retransmits, or retransmits on described competitive resource。
Preferably, described base station is further used for carrying in uplink authorization information for carrying out retransmitting the re-transmission RNTI authorized；Described UE is further used for when to retransmit, and the described control channel retransmitting RNTI or data channel acquisition re-transmission mandate are carried in detection, retransmit on described retransmission resource。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。
Claims (12)
1. based on a uplink data transmission method for competition, including:
Base station sends uplink authorization information to user equipment (UE), indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；Described UE transmission mode as indicated on the competitive resource that uplink authorization information indicates sends upstream data；Described base station returns response message to described UE, indicates its data whether being properly received on competitive resource；After described UE receives response message, send success or failure according to its upstream data on competitive resource of response message authentication。
2. the method for claim 1, it is characterised in that
Described base station one of in the following manner sends uplink authorization information to UE:
Described base station sends one or more uplink authorization information by the control signaling on Physical Downlink Control Channel to multiple UE, and indicate with one or more resource identification informations control signaling is carried for uplink authorization information；
Described uplink authorization information is placed in Physical Downlink Shared Channel and sends by described base station, and on Physical Downlink Control Channel, send the control signaling carrying downstream grants information, what control to carry in signaling by a mark instruction is the downstream grants information of the MACCE carrying uplink authorization information, described base station indicated by one or more resource identification informations in MACCE MACCE carries for uplink authorization information；
Each uplink authorization information at least includes for indicating the frequency resource information of the position of competitive resource and for indicating the modulation coding information of transmission mode。
3. the method for claim 1, it is characterised in that
Described base station includes to the UE step returning response message:
Described base station sends response message with the time-frequency region of UE agreement to UE on down control channel, simultaneously, Medium Access Layer MAC message is passed through in described base station, or wireless chain control layer RLC message, or radio resource control layer RRC information sends response message to UE, whether described response message instruction base station is properly received upstream data；Or
Described base station is only by Medium Access Layer MAC message, or wireless chain control layer RLC message, or radio resource control layer RRC information sends response message to UE, and whether instruction base station is properly received upstream data。
4. method as claimed in claim 3, it is characterised in that
When described base station sends described response message by common signal channel, described response message is carried response Radio Network Temporary Identifier RNTI, described response RNTI for identifying the response message that this message is the data transmission based on competition。
5. the method for claim 1, it is characterised in that
The response message authentication upstream data that described UE returns according to base station sends after unsuccessfully, retransmits in base station in the resource authorized and retransmits, or retransmits on described competitive resource。
6. method as claimed in claim 5, it is characterised in that
Described base station is carried for carrying out retransmitting the re-transmission RNTI authorized in uplink authorization information, when UE to retransmit, detects the control channel carrying the described RNTI of re-transmission or data channel obtains to retransmit and authorizes, retransmit on described retransmission resource。
7. based on a transmitting uplink data system for competition, including: base station and multiple user equipment (UE), wherein:
Described base station, for sending uplink authorization information to described UE, indicates the position of competitive resource and sends the transmission mode of upstream data on this competitive resource；And for returning response message to UE, indicate its data whether being properly received on competitive resource；
Described UE, sends upstream data for transmission mode as indicated on the competitive resource that described uplink authorization information indicates, and after being used for receiving response message, sends success or failure according to its upstream data on competitive resource of response message authentication。
8. system as claimed in claim 7, it is characterised in that
Described base station is further used on down control channel and the UE time-frequency region arranged 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 information sends response message to UE, whether described response message instruction base station is properly received upstream data。
9. system as claimed in claim 7, it is characterised in that
Described base station is further used for only by Medium Access Layer MAC message, or wireless chain control layer RLC message, or radio resource control layer RRC information sends response message to UE, and whether instruction base station is properly received upstream data。
10. system as claimed in claim 8 or 9, it is characterised in that
When described base station sends described response message by common signal channel, described response message is carried response Radio Network Temporary Identifier RNTI, described response RNTI for identifying the response message that this message is the data transmission based on competition。
11. system as claimed in claim 7, it is characterised in that
The response message authentication upstream data that described UE is additionally operable to according to base station returns sends after unsuccessfully, retransmits in base station in the resource authorized and retransmits, or retransmits on described competitive resource。
12. system as claimed in claim 11, it is characterised in that
Described base station is further used for carrying in uplink authorization information for carrying out retransmitting the re-transmission RNTI authorized；
Described UE is further used for when to retransmit, and the described control channel retransmitting RNTI or data channel acquisition re-transmission mandate are carried in detection, retransmit on described retransmission resource。
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| CN201010115048.9A CN102158981B (en) | 2010-02-11 | 2010-02-11 | A kind of uplink data transmission method based on competition and system |
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| CN201010115048.9A CN102158981B (en) | 2010-02-11 | 2010-02-11 | A kind of uplink data transmission method based on competition and system |
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