A kind of method, system and equipment that reduces high speed sharing control channel overhead
Technical field
The present invention relates to high speed downlink packet access technology (HSDPA, High Speed Downlink PacketAccess), relate in particular to a kind of method, system and equipment that reduces High-Speed Shared Control Channel (HS-SCCH) expense.
Background technology
HSDPA is enhancing and the evolution of Wideband Code Division Multiple Access (WCDMA) (WCDMA) system at wireless portion, HSDPA comprises two down channels and a up channel, described two down channels are respectively: HS-SCCH and high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH), described up channel is: high-speed shared information channel (HS-SICH).Wherein, HS-PDSCH is used for the bearing downlink business datum, and HS-SCCH is used to carry the control information relevant with the HS-PDSCH business datum, and HS-SICH is used for carrying and feeds back read really symbol (ACK) and CQI (CQI) message.
In the HSDPA of existing 1.28M time division duplex (TDD, Time Division Duplex) pattern transmission, network side is one group of HS-SCCH of each terminal (UE) configuration, and terminal continues to monitor to described HS-SCCH.Base station node B dispatches all terminals in the sub-district, the moment that the affiliated terminal of determination data, data send and the required physical resource of transmission data, and by HS-SCCH notice relevant terminal described data of reception on corresponding physical resource.No matter first transfer of data or data re-transmission, transmission course is:
When the base station sends downlink service data will for certain terminal on HS-PDSCH, at first, send HS-SCCH to this terminal, carry the physical resource that HS-PDSCH takies, modulation system, transmission block size that this transmission is adopted, the identification code information such as (ID) of mixing automatic repeat requests (HARQ) information, new data indication and terminal on the described HS-SCCH, particular content as shown in Table 1; Behind correct reception of terminal and decoding HS-SCCH, on the physical resource of IHS-SCCH indication, receive the HS-PDSCH data, and the HS-PDSCH data that receive are carried out the demodulation sign indicating number, if decoding is correct, then feeding back ACK and CQI information on HS-SICH, incorrect if decode, then on HS-SICH, feed back NACK and CQI information.
Table one
In above-mentioned data transmission procedure, no matter data are transmitted first, when still carrying out data re-transmission, the base station all needs to send HS-SCCH to relevant terminal earlier, and HS-SCCH takies two SF16 code channels, for business such as for example Internet protocol voice (VoIP), the expense of HS-SCCH is excessive.
Summary of the invention
In view of this, one of purpose of the present invention is to provide a kind of method, system and equipment of the HS-SCCH of reducing expense, can reduce the quantity of HS-SCCH transmission and send the shared resource of HS-SCCH at every turn.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of method that reduces the high-speed shared control channel HS-SCCH expense, this method comprises:
When base station decision changes the shared physical resource of the high-speed physical downlink shared channel (HS-PDSCH) HS-PDSCH of terminal monitoring, send HS-SCCH to terminal.
Wherein, carry physical resource and host ID id information that the base station is a terminal distribution on the described HS-SCCH, be carried on a spreading factor behind described physical resource and the Termination ID information coding and be on 16 the code channel.
Carry downlink service data and transmission block size TBS and new data indication NDI message on the described HS-PDSCH.
This method further comprises: the base station starts timing device when sending described HS-SCCH, waits for the feedback information of terminal about HS-SCCH.
This method further comprises: after terminal receives described HS-SCCH, the HS-SCCH that receives is decoded, determine that HS-SCCH decodes when correct, terminal is to the feedback information of base station transmission about HS-SCCH, afterwards, the physical resource information according to the HS-SCCH carrying changes the physical resource of monitoring; After the base station received described feedback information, base station and terminal were transmitted the HS-PDSCH data of this terminal correspondence on the physical resource after the change.
This method further comprises: when HS-SCCH decodes when incorrect, and the terminal HS-PDSCH that on original physical resource, receives and decode.
When terminal was not correctly decoded the HS-SCCH that sends the base station, described original physical resource was: the high-rise physical resource by RRC signaling terminal of network side;
When terminal was correctly decoded the HS-SCCH that sends the base station, described original physical resource was: the employed physical resource of current reception HS-PDSCH.
This method further comprises:
When terminal is decoded when correct to HS-PDSCH, send acknowledge character ACK feedback to the base station;
When terminal HS-PDSCH is decoded when incorrect, described HS-PDSCH is kept in the buffer memory.
Described RRC signaling is specially: the network side high level sends to the signaling of the HS-SCCH that comprises terminal monitoring of terminal, physical resource that terminal feedback high-speed shared information channel HS-SICH takies, physical resource that HS-PDSCH takies and basic transport block size information in RRC link when setting up.
When RRC link is set up, when the network side high level sends to the described signaling of terminal, send the signaling of the HS-PDSCH physical resource that is included as each terminal distribution and basic transport block size information to the base station.
This method further comprises: after terminal receives described RRC signaling, continue to monitor described HS-SCCH.
The present invention provides a kind of base station of realizing reducing the HS-SCCH expense simultaneously, and this base station comprises: data reception module, physical source distributing module and data transmission blocks, wherein,
Data reception module is used for the signaling that the network side high level that receives is sent is sent to physical source distributing module and data transmission blocks; Also be used to receive when terminal sends about the feedback information of HS-SCCH, described feedback information is sent to the physical source distributing module;
The physical source distributing module, when being used for base station decision under the physical source distributing module self and changing the shared physical resource of the HS-PDSCH of terminal monitoring, for counterpart terminal distributes new physical resource, and will send to data transmission blocks according to the HS-SCCH of newly assigned physical resource and the generation of Termination ID information;
Data transmission blocks is used for the HS-SCCH that the physical source distributing module that receives is sent is sent to corresponding terminal; Also be used for being the physical resource of terminal distribution, send HS-PDSCH to corresponding terminal.
Wherein, the physical source distributing module is further used for: when sending described HS-SCCH, start timing device, wait for the described feedback information of terminal, when in the timing device setting-up time, not receiving described feedback information, generate HS-SCCH once more and send to data transmission blocks.
Carry physical resource and Termination ID information that the base station is a terminal distribution on the described HS-SCCH.
Carry downlink service data and TBS, NDI message on the described HS-PDSCH.
The present invention provides a kind of terminal that realizes reducing the HS-SCCH expense simultaneously, and this terminal comprises: data reception module, HS-SCCH decoder module and data transmission blocks, wherein,
Data reception module is used for receiving HS-PDSCH on the physical resource for terminal distribution under the data reception module; Also be used for changing the physical resource of monitoring according to the described physical resource information that receives; Also be used for the HS-SCCH that send the base station that receives is sent to the HS-SCCH decoder module;
The HS-SCCH decoder module when being used to receive described HS-SCCH, is decoded to HS-SCCH, decodes to generate feedback information when correct, sends to data transmission blocks, simultaneously the physical resource information that comprises among the HS-SCCH is sent to data reception module;
Data transmission blocks, be used to receive the feedback information that the HS-SCCH decoder module sends after, described feedback information is sent to the base station.
Wherein, data reception module is further used for: the HS-PDSCH that the base station that receives is sent sends to the HS-PDSCH decoder module;
Accordingly, this terminal further comprises:
The HS-PDSCH decoder module is used for the described HS-PDSCH that receives is decoded, and decodes to generate the ACK feedback when correct and send to data transmission blocks; Also be used for when decoding is incorrect, described HS-PDSCH being put into buffer memory;
Accordingly, data transmission blocks is further used for: after receiving the ACK feedback that the HS-PDSCH decoder module sends, described ACK feedback is sent to the base station.
Describedly be specially for the physical resource of terminal distribution: the high-rise physical resource of network side by RRC signaling terminal; Or the base station is by the physical resource of HS-SCCH notice terminal.
The present invention also provides a kind of system that realizes reducing the HS-SCCH expense, this system comprises base station and terminal, wherein, base station side comprises: data reception module, physical source distributing module and data transmission blocks, end side comprises: data reception module, HS-SCCH decoder module and data transmission blocks, wherein
The base station side data reception module is used for the signaling that the network side high level that receives is sent is sent to physical source distributing module and data transmission blocks; Also be used to receive when terminal sends about the feedback information of HS-SCCH, described feedback information is sent to the physical source distributing module;
Base station side physical source distributing module, when being used for base station decision under the physical source distributing module self and changing the shared physical resource of the HS-PDSCH of terminal monitoring, for counterpart terminal distributes new physical resource, and will send to data transmission blocks according to the HS-SCCH of newly assigned physical resource and the generation of Termination ID information;
The base station side data transmission blocks is used for the HS-SCCH that the physical source distributing module that receives is sent is sent to corresponding terminal; Also be used for being the physical resource of terminal distribution, send HS-PDSCH to corresponding terminal;
The terminal side data receiver module is used for receiving HS-PDSCH on the physical resource for terminal distribution under the data reception module; Also be used for changing the physical resource of monitoring according to the described physical resource information that receives; Also be used for the HS-SCCH that send the base station that receives is sent to the HS-SCCH decoder module;
End side HS-SCCH decoder module when being used to receive described HS-SCCH, is decoded to HS-SCCH, decodes to generate feedback information when correct, sends to data transmission blocks, simultaneously the physical resource information that comprises among the HS-SCCH is sent to data reception module;
The terminal side data sending module, be used to receive the feedback information that the HS-SCCH decoder module sends after, described feedback information is sent to the base station.
Wherein, base station side physical source distributing module is further used for: when sending described HS-SCCH, start timing device, wait for the described feedback information of terminal, when in the timing device setting-up time, not receiving described feedback information, generate HS-SCCH once more and send to data transmission blocks.
The terminal side data receiver module is further used for: the HS-PDSCH that the base station that receives is sent sends to the HS-PDSCH decoder module;
Accordingly, this terminal further comprises:
End side HS-PDSCH decoder module is used for the described HS-PDSCH that receives is decoded, and decodes to generate the ACK feedback when correct and send to data transmission blocks; Also be used for when decoding is incorrect, described HS-PDSCH being put into buffer memory;
Accordingly, the terminal side data sending module is further used for: after receiving the ACK feedback that the HS-PDSCH decoder module sends, described ACK feedback is sent to the base station.
Method, system and the equipment that reduces the HS-SCCH expense provided by the present invention, only when the base station decision changes the shared physical resource of the HS-PDSCH of terminal monitoring, just send HS-SCCH to terminal, all send HS-SCCH no longer at every turn when carrying out transfer of data, reduced the traffic volume of HS-SCCH; The HS-SCCH that the base station sends compares with HS-SCCH of the prior art, only carrying the base station is the physical resource of terminal distribution and the id information of terminal, also only take a SF16 code channel behind the coding, and the transmission block size (TBS) of carrying on HS-SCCH in the prior art, new data indication information such as (NDI) changes the carrying by HS-PDSCH, thereby has reduced the occupancy of HS-SCCH for code channel resource.
Description of drawings
Fig. 1 reduces the method flow schematic diagram of HS-SCCH expense for the present invention;
Fig. 2 reduces the architecture of base station schematic diagram of HS-SCCH expense for realizing the present invention;
Fig. 3 reduces the terminal structure schematic diagram of HS-SCCH expense for realizing the present invention.
Embodiment
Basic thought of the present invention is: only when the base station decision changes the shared physical resource of the HS-PDSCH of terminal monitoring, just send HS-SCCH to terminal; It is the physical resource of terminal distribution and the id information of terminal that the HS-SCCH that the base station sends only carries the base station, the HS-PDSCH carrying that other sends as information from base station such as TBS, NDI, that is to say that HS-PDSCH also carries information such as TBS, NDI except the bearing downlink business datum.
Below be described with reference to the accompanying drawings the realization that the present invention reduces method, base station, terminal and the system of HS-SCCH expense by specific embodiment.
Fig. 1 reduces the method flow schematic diagram of HS-SCCH expense for the present invention, and as shown in Figure 1, this method comprises:
Step 101: when Radio Resource control (RRC) link is set up, HS-SCCH and the HS-SICH of the feedback physical resource that take, physical resource that HS-PDSCH take and the basic transmission block size of network side high level by high-level signaling notice terminal monitoring; Simultaneously, physical resource information that takies for the HS-PDSCH of each terminal distribution by the signaling base station and basic information such as transmission block size.
Wherein, described high-level signaling can be the RRC signaling.
Step 102: the base station sends the HS-PDSCH data of counterpart terminal on the physical resource of the high-rise notice of network side, and described terminal receives HS-PDSCH and decoding on the physical resource of the high-rise notice of network side; Simultaneously, terminal promptly begins to continue to monitor the HS-SCCH that is notified in the signaling after receiving described high-level signaling.
Compared with prior art, HS-PDSCH is last except the bearing downlink business datum, also carries TBS and NDI message, can be placed on ad-hoc location behind these message codings, as transformat combination indication (TFCI) position.When terminal receives described HS-PDSCH, at first decode TBS and NDI, the information that obtains according to decode TBS and NDI is decoded to HS-PDSCH then, when HS-PDSCH decodes when correct, to base station feedback ACK, as it is incorrect to decode, and then saves the data in the buffer memory on HS-SICH.Wherein, specifically how to carry out the decoding of TBS, NDI and HS-PDSCH and how can use prior art, repeat no more here to base station feedback ACK.
In addition, how the base station sends HS-PDSCH and terminal and how to receive HS-PDSCH and all belong to known technology on corresponding physical resource, repeat no more here.
Step 103: when base station decision changes the shared physical resource of the HS-PDSCH of terminal monitoring, by sending HS-SCCH notice terminal.
After the base station sends HS-SCCH, start timing device and wait for that the ACK of terminal feeds back, if in the timing device setting-up time, receive described feedback, then on new physical resource, carry out the transmission of HS-PDSCH with terminal; After if timing device is overtime, the base station does not receive the ACK feedback of terminal, then resends HS-SCCH, till the ACK feedback that receives terminal.
Generally speaking, whether the base station changes the shared physical resource of HS-PDSCH of terminal monitoring according to self scheduling strategy decision, and how the base station specifically changes described physical resource according to self scheduling strategy decision and belong to known technology, repeats no more here.
Here, described HS-SCCH carrying base station is the new physical resource information and the Termination ID information of terminal distribution, and is identical in described physical resource information and the prior art, takies 13 bits, is used to indicate time slot and code channel information; The id information of terminal also takies 16 bits.The id information of described physical resource and terminal is carried on the code channel of a SF16 after encoding.Wherein, specifically how the id information of physical resource and terminal being encoded belongs to known technology, repeats no more here.
The time that described timer sets is depended on the factors such as disposal ability of terminal, for example can be set to: in maximum two TTI of the time interval (TTI)=n that send HS-SCCH, promptly at TTI=n+1 or the latest in TTI=n+2, do not receive that terminal feeds back about the feedback information of HS-SCCH the time, send HS-SCCH once more.
Step 104: when terminal receives described HS-SCCH, the HS-SCCH that receives is decoded.
Wherein, the HS-SCCH that specifically how to decode can use prior art, repeats no more here.
Whether step 105: terminal judges HS-SCCH decoding is correct, if correct, then execution in step 106; If incorrect, then execution in step 107.
Step 106: terminal on HS-SICH to base station feedback accordingly about the feedback information of HS-SCCH, afterwards, the physical resource that HS-PDSCH is taken is changed into the physical resource of HS-SCCH indication.
Wherein, the feedback information that terminal sends to the base station can for example use a kind of invalid TBS grade etc. with a kind of mode of feeding back ACK when being different from correct reception HS-PDSCH, can independently set according to practical application.
Step 107: the base station is sending HS-PDSCH on the physical resource of terminal distribution; Simultaneously, terminal receives HS-PDSCH and decoding on the physical resource that distributes for self, if decoding is correct, then on HS-SICH to base station feedback ACK; Incorrect if decode, then HS-PDSCH is kept in the buffer memory.
Wherein, when after the execution of step 106 during execution in step 107, be that to be correctly decoded the resulting base station of HS-SCCH in step 105 be the newly assigned physical resource of terminal to terminal for the physical resource of terminal distribution described in this step; When after the execution of step 105 during execution in step 107, the success because HS-SCCH does not decode, so described in this step for the physical resource of terminal distribution be original physical resource, at this moment, two kinds of situations of the same existence of described original physical resource, that is: before carrying out this step, when terminal was not correctly decoded the HS-SCCH that sends the base station, described original physical resource was: the network side high level is by the described physical resource of high-level signaling notice terminal; When terminal was correctly decoded the HS-SCCH that sends the base station, described original physical resource was: current terminal receives the employed physical resource of HS-PDSCH.
Wherein, how terminal specifically carries out the decoding of HS-PDSCH, identical with the method for describing in the step 102, repeats no more here.
In addition, in the method shown in Figure 1, the step when step 101 and step 102 have just been set up for the RRC link will be in case after terminal was correctly decoded the HS-SCCH that sends the base station, method shown in Figure 1 will be complete by step 103~step 107 sequential loop.
Be illustrated in figure 2 as the architecture of base station schematic diagram of realizing the method for the invention, as shown in Figure 2, this base station comprises: data reception module 210, physical source distributing module 220 and data transmission blocks 230, wherein,
Data reception module 210 is used for the data that receiving terminal or network side high level are sent, and when receiving the signaling that the network side high level sends, the described signaling that receives is sent to physical source distributing module 220 and data transmission blocks 230; Also be used to receive when terminal sends about the feedback information of HS-SCCH, described feedback information is sent to physical source distributing module 220.Wherein, be included as physical resource information that the HS-PDSCH of each terminal distribution takies and basic transport block size information in the signaling that described network side high level is sent.
Physical source distributing module 220, be used for when the decision of the base station under the physical source distributing module 220 self changes the physical resource that HS-PDSCH takies, for counterpart terminal distributes new physical resource, and generate HS-SCCH according to newly assigned physical resource and Termination ID information, the HS-SCCH of described generation is sent to data transmission blocks 230; When sending described HS-SCCH, start timing device, wait for the feedback information of terminal feedback about HS-SCCH, in the timing device setting-up time, when not receiving the feedback information of terminal, generate HS-SCCH once more and send to data transmission blocks 230, to send described HS-SCCH to relevant terminal once more.
Data transmission blocks 230 is used for the HS-SCCH that the physical source distributing module 220 that receives is sent is sent to relevant terminal; Also be used for being the physical resource of terminal distribution, send HS-PDSCH to relevant terminal.
Be illustrated in figure 3 as the terminal structure schematic diagram of realizing the method for the invention, as shown in Figure 3, this terminal comprises: data reception module 310, HS-SCCH decoder module 320, HS-PDSCH decoder module 330 and data transmission blocks 340, wherein,
Data reception module 310 is used for receiving HS-PDSCH on the physical resource for data reception module 310 affiliated terminal distribution; Also be used for the physical resource information sent according to the HS-SCCH decoder module 320 that receives, change the physical resource of being monitored; Also be used for the HS-PDSCH that send the base station that receives is sent to HS-PDSCH decoder module 330; Also be used for sending to HS-SCCH decoder module 320 with receiving the HS-SCCH that sends the base station.
Wherein, when the RRC link was set up, described was the physical resource of the high-rise notice of network side for the physical resource of terminal distribution; In case after terminal was correctly decoded the HS-SCCH that sends the base station, describedly be the physical resource of the terminal distribution physical resource that is the base station by HS-SCCH notice terminal.
HS-SCCH decoder module 320, when being used to receive described HS-SCCH, HS-SCCH is decoded, as it is correct to decode, then generate feedback information about HS-SCCH, and described feedback information sent to data transmission blocks 340, simultaneously the physical resource information that comprises among the HS-SCCH is sent to data reception module 310.
HS-PDSCH decoder module 330 is used for the described HS-PDSCH that receives is decoded, and when decoding is correct, generates the ACK feedback and sends to data transmission blocks 340; Also be used for when decoding is incorrect, described HS-PDSCH being put into buffer memory.
Data transmission blocks 340, be used to receive the described feedback information or described ACK feedback that HS-SCCH decoder module 320 or HS-PDSCH decoder module 330 send after, above-mentioned information is sent to the base station.
Wherein, the terminal shown in the base station shown in several Fig. 2 and Fig. 3 is formed the system that realization realization of the present invention reduces the HS-SCCH expense.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.