CN101442795B - Power control method for ascending control channel - Google Patents
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Abstract
A power control method of uplink control channel of the invention comprises: step S302 configuring association of uplink control channel and downlink service channel or downlink control channel; stepS304 loading closed loop power control command of uplink control channel at downlink service channel or downlink control channel to perform closed loop power control for uplink control channel. The method of the invention reduces emission of downlink control channel and producing cost, and promotes system efficiency.
Description
Technical field
The present invention relates to wireless telecommunication system, particularly the Poewr control method of the ascending control channel in the time-division scheduling system.
Background technology
A disequilibrium that important feature is the traffic carrying capacity of professional uplink and downlink link of 3-G (Generation Three mobile communication system), the traffic carrying capacity of down link are generally greater than the traffic carrying capacity of up link.To this demand, 3GPP (3rd Generation Partnership Project, third generation partner program) has introduced HSDPA (High Speed DownlinkPacket Access, high speed downlink packet inserts) technology in the 3G standard.In the HSDPA characteristic; Through introducing AMC (Adaptive Modulation and Coding; Adaptive coding and modulating), HARQ (Hybrid Automatic Retransmission Request; Mix automatic repeat requests) technology and the relevant technology that reduces the network processes time delay, the downlink grouping traffic speed of higher rate is provided, improve spectrum utilization efficiency.
At TD-SCDMA (Time Division-Synchronous Code DivisionMultiple Access; The TD SDMA access) in the HSDPA technology of system; Newly introduced wireless physical channel; Comprise: HS-PDSCH (High Speed PhysicalDownlink Shared Channel, high-speed physical downlink is shared physical channel), HS-SCCH (Shared Control Channel for HS-DSCH; High-Speed Shared Control Channel) and HS-SICH (Shared Information Channel for HS-DSCH, high-speed shared information channel).Wherein, HS-PDSCH is used for carrying user's business datum as Traffic Channel; HS-SCCH is used for carrying the phase related control information that control UE (subscriber equipment) receives the HS-PDSCH channel as down control channel; HS-SICH is used for carrying the feedback information of UE to its reception HS-PDSCH of NodeB (base station) transmission channel as ascending control channel, and each bar HS-SCCH channel is fixing corresponding with a HS-SICH channel.Above-mentioned physical channel resources in sub-district is that the form with resource pool is to share a plurality of user time-division in the sub-district.In the HSDPA of TD-SCDMA system technology, the distribution method of wireless physical channel resource is: network side is 1 to 4 HS-SCCH of a UE configuration, constitutes 1 HS-SCCH collection, disposes a HS-SICH correspondingly for every HS-SCCH simultaneously.In carrying out data transmission procedure; Each TTI (Transmission TimeInterval; Transmission Time Interval) (5ms); The NodeB of network side selects the HS-SCCH control information that the HS-PDSCH channel resource allocation is relevant to send to UE in above-mentioned set to certain UE, and UE receives the HS-PDSCH channel according to this control information, and the reception condition feedback information that on a corresponding HS-SICH channel of this HS-SCCH, sends the HS-PDSCH channel is to NodeB.
In above-mentioned HSDPA technology, the control channel HS-SCCH and the HS-SICH that are used for the descending scheduling transmission dispose use in pairs, when these two control channels being carried out power control, can constitute closed loop each other and carry out fast closed-loop power control.As shown in Figure 1, be example with the HS-SICH channel, can carry out power control to HS-SICH through on HS-SCCH, carrying TPC (TransmitPower Control, closed power control) order.If in a period of time, give certain UE continuously or with the resource of relatively short time interval scheduling HSDPA, carry out the descending scheduling transmission, then during this period of time can carry out closed power control to HS-SICH through on HS-SCCH, carrying the TPC order.
In the HSDPA technology; HS-SCCH is an important expense in the HSDPA transmission; The data packet transmission that this expense is big relatively is smaller; But it is still more considerable such as VoIP (Voice over IP, IP phone) for IMS (IPMultimedia Core Network Subsystem, IP Multimedia System) real time business.Therefore, for this type of business, a kind of method that reduces the control channel expense is the Control Parameter of simplifying in the HSDPA transmission course; Like fixing or more pre-configured parameters; More pre-configured HS-PDSCH physical channel resources, and combine the blind Detecting technology, make the transmission of HARQ first of this type business need not send HS-SCCH; Do not send HS-SCCH when promptly transmitting new data packets and authorize the HS-PDSCH channel resource, and be to use the pre-configured new packet of HS-PDSCH channel resource transmission.After the terminal receives packet; Need be according to reception condition; Send HS-SICH feedback HARQ ACK/NACK (acknowledgement/non-acknowledgement) information and give NodeB, send HS-SICH when perhaps receiving successfully and feed back HARQ ACK information, and do not send HS-SICH when taking defeat to NodeB; In the NodeB side, for the packet of each transmission,, then give the terminal through HS-SCCH dynamic assignment mandate HS-PDSCH channel resource if receive the NACK feedback information or do not receive the HS-SICH channel, retransmit the packet of bust this.This method can be referred to as the HS-SCCH-less method.
In above-mentioned HS-SCCH-less method, might most packets all be a transmission success, the relative minority of the data that retransmit.Therefore, in professional transmission course, many times do not carry out the HS-SCCH transmission but needs transmission HS-SICH.Obviously, it is just no longer suitable to the method that HS-SICH carries out closed power control that passing through in the above-mentioned HSDPA technology carried the TPC order on HS-SCCH.The present invention will provide the Poewr control method of the ascending control channel in a kind of time-division scheduling system, solve ascending control channel closed power control problem in the HS-SCCH-less method.
Summary of the invention
The present invention provides a kind of Poewr control method of ascending control channel, solves in the HS-SCCH-less method to carry out closed power control problem to ascending control channel through on down control channel, carrying closed loop power control command.
The Poewr control method of ascending control channel of the present invention comprises: step S302, the incidence relation of collocating uplink control channel and downlink traffic channel or down control channel; Step S304 is according to the incidence relation of configuration, at the closed loop power control command of downlink traffic channel or down control channel carrying ascending control channel, ascending control channel is carried out closed power control.
In step S302: during for HARQ transmission first; There is not to send downlink traffic channel resource through the down control channel mandate; And use pre-configured downlink traffic channel resource, then the ascending control channel configuration is associated with at least one pre-configured downlink traffic channel; When retransmitting for HARQ; Transmission has the downlink traffic channel resource through the down control channel mandate; And the downlink traffic channel resource through the down control channel mandate does not belong to pre-configured downlink traffic channel resource, and then the ascending control channel configuration is corresponding one by one with down control channel; When retransmitting for HARQ; Transmission has the downlink traffic channel resource through the down control channel mandate; And the downlink traffic channel resource through the down control channel mandate belongs to pre-configured downlink traffic channel resource, and then the ascending control channel configuration is associated with at least one pre-configured downlink traffic channel resource.
Wherein, down control channel or pre-configured downlink traffic channel are associated with at least one ascending control channel.The incidence relation of ascending control channel and downlink traffic channel resource when pre-configured downlink traffic channel and the uplink control channel resource, sends to terminal through high-level signaling by network side.
In step S304: perhaps the time interval between the professional transmission of descending scheduling is then carried out closed power control to ascending control channel less than the threshold value that pre-sets if carry out the professional transmission of descending scheduling at the appointed time continuously.If down control channel distributes or prewiredly is equipped with many downlink traffic channel resources, select wherein a downlink traffic channel or use many downlink traffic channel to carry closed loop power control commands.Can select a downlink traffic channel to carry closed loop power control command through network side, and the object information of selecting is sent to the terminal through high-level signaling; The minimum downlink traffic channel of numbering that also can select to number on the minimum time slot is carried closed loop power control command.If the ascending control channel configuration is corresponding one by one with down control channel, then on down control channel, carry closed loop power control command.
Use down control channel to distribute or many pre-configured downlink traffic channel carrying closed loop power control commands; Transmitting terminal all sends same closed loop power control command on every downlink traffic channel, and receiving terminal is merged into a closed loop power control command after many downlink traffic channel receive closed loop power control command.
The downlink traffic channel of wherein, carrying closed loop power control command is used the time slot format of supporting to carry closed loop power control command.High-level signaling comprises: system broadcast information or radio resource control signaling message.
The invention provides a kind of Poewr control method of ascending control channel; When utilizing the descending scheduling transmission; The corresponding relation of downlink traffic channel and ascending control channel; Carry the closed loop power control command of ascending control channel through downlink traffic channel, strengthened the bearing method of the closed loop power control command of ascending control channel, removed when carrying the closed loop power control command of ascending control channel mission need down control channel through down control channel; Thereby reduced the expense of emission of downlink control channel and generation thereof, improved system effectiveness.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is a HS-SICH power control sketch map in the existing TD-SCDMA system;
Fig. 2 is the timing relationship sketch map between the physical channel that the HSDPA technology is relevant in the TD-SCDMA system;
Fig. 3 is the flow chart of steps according to the Poewr control method of ascending control channel of the present invention;
Fig. 4 is the burst structure sketch map that has HS-PDSCH physical channel in the HSDPA technology in the TD-SCDMA system now;
Fig. 5 is a kind of burst structure sketch map according to HS-PDSCH physical channel of the present invention; And
Fig. 6 is the another kind of burst structure sketch map according to HS-PDSCH physical channel of the present invention.
Embodiment
With reference to accompanying drawing, specify embodiment of the present invention below.
In the HSDPA of TD-SCDMA system technology, down control channel (HS-SCCH), downlink traffic channel (HS-PDSCH) and ascending control channel (HS-SICH) timing relationship when carrying out the descending scheduling transmission is as shown in Figure 2.If introduce the HS-SCCH-less method, then need not send HS-SCCH carrying out HARQ transmission first, but HS-PDSCH and HS-SICH channel can still keep timing relationship as shown in Figure 2.In the HS-SCCH-less method, use the Poewr control method of ascending control channel of the present invention, as shown in Figure 3, may further comprise the steps:
Step S302, the incidence relation of collocating uplink control channel and downlink traffic channel or down control channel; Step S304 is according to the incidence relation of configuration, at the closed loop power control command of downlink traffic channel or down control channel carrying ascending control channel, ascending control channel is carried out closed power control.
In step S302, common HSDPA technology is different in HS-SCCH-less method and the TD-SCDMA system, HS-SICH can't be all the time with HS-SCCH one by one associated in correspondence use.In the HS-SCCH-less method; If carrying out HARQ retransmits; Have HS-SCCH to authorize the HS-PDSCH channel resource, then subsequently HS-SICH can with HS-SCCH one by one associated in correspondence use, the collocation method of incidence relation is identical with collocation method in the HSDPA technology.But for HARQ transmission first; Do not send HS-SCCH and authorize the HS-PDSCH channel resource; And be to use pre-configured HS-PDSCH channel resource, then HS-SICH need be associated with pre-configured HS-PDSCH channel resource, if pre-configured HS-PDSCH channel resource comprises many HS-PDSCH channels; Then HS-SICH can be associated with wherein one or many; Its incidence relation when pre-configured HS-PDSCH channel and the HS-SCIH channel resource, through high-level signaling, comprises that system broadcast information or RRC (Radio Resource control) signaling message sends to the terminal by network side.When retransmitting for HARQ, the HS-PDSCH channel resource of authorizing through HS-SCCH is the part in the pre-configured HS-PDSCH channel resource, and then HS-SICH also can be associated with pre-configured HS-PDSCH channel resource.For a terminal, HS-SCCH can be associated with different or identical HS-SICH channel with prewired HS-PDSCH channel.
In step S304; In carrying out the professional transmission course of descending scheduling,, perhaps at interval free between the professional transmission of descending scheduling if carry out the professional transmission of descending scheduling in a period of time continuously; But the time interval is then carried out closed power control to ascending control channel less than pre-configured threshold value; Otherwise down control channel is carried out open Loop Power control, and during open Loop Power control, control method is identical with method in the existing HSDAP technology.In the closed power control procedure, pre-configured threshold value through high-level signaling, comprises that broadcasting is sent or the terminal-specific signaling message sends to the terminal, perhaps by not configurable value of system definition by network side.
When ascending control channel HS-SICH being carried out closed power control; If carry out HARQ transmission first; Network side carries the TPC order through downlink traffic channel HS-PDSCH and sends to the terminal, is used for carrying out the closed power control of ascending control channel HS-SICH.The HS-SICH channel emission power that increases or reduce the preset power step-length is ordered according to the TPC that carries on the HS-PDSCH channel in the terminal, and the preset power step-length is disposed to the terminal through high-level signaling by network side; The HS-PDSCH channel resource that uses in such cases is to adopt pre-configured method to be distributed by network side and send to the terminal.
In this case, with existing HSDPA compared with techniques in the TD-SCDMA system because the time slot format of the HS-PDSCH physical channel in the existing HSDPA technology; Corresponding burst format is as shown in Figure 4; All can not support to carry the TPC order, the present invention need increase the time slot format of HS-PDSCH physical channel, corresponding burst format such as Fig. 5 or shown in Figure 6; To support to carry the TPC order; (, 16QAM), need to increase the time slot format of the HS-PDSCH physical channel under the different modulating mode if consider different modulation modes like QPSK.Simultaneously, because a TTI possibly be assigned many HS-PDSCH physical channels (code channel), and in fact only need a TPC order to need to carry, bearing method can have:
For one pre-configured or many HS-PDSCH channels; Select wherein HS-PDSCH channel bearing TPC order; This HS-PDSCH channel need use the time slot format that increases newly, and other HS-PDSCH channel uses the time slot format of HS-PDSCH channel in the existing HSDPA technology.On the one hand, can select a HS-PDSCH channel bearing TPC order and this information is passed through high-level signaling, comprise that broadcasting is sent or the terminal-specific signaling message sends to the terminal by network side; On the other hand, system also can a kind of system of selection of predefine, as: if many HS-PDSCH channels are arranged, select the minimum HS-PDSCH channel of numbering on the minimum time slot of numbering to carry this TPC order.
For pre-configured one or many HS-PDSCH channels, on all HS-PDSCH channels, all carry one but identical TPC order, all HS-PDSCH channels all use the time slot format that increases newly.Transmitter side all sends same TPC order on every HS-PDSCH channel, and receiver side will be merged into a TPC order from the TPC order that all HS-PDSCH channels receive.
When ascending control channel HS-SICH being carried out closed power control, retransmit if carry out HARQ, network side at first need be given the terminal through down control channel HS-SCCH dynamic assignment mandate downlink traffic channel HS-PDSCH resource.Therefore, network side can carry the TPC order through HS-SCCH and send to the terminal, is used for carrying out the closed power control of ascending control channel HS-SICH.The HS-SICH channel emission power that increases or reduce the preset power step-length is ordered according to the TPC that carries on the HS-SCCH channel in the terminal, and the preset power step-length is disposed to the terminal through high-level signaling by network side.In this case, need not carry the TPC order that is used for the control of ascending control channel HS-SICH closed power on the HS-PDSCH channel.
Carrying out HARQ when retransmitting, network side also can carry the TPC order that is used for the control of HS-SICH closed power through HS-PDSCH, and is identical when carrying out the HARQ transmission first, needs to increase the time slot format of HS-PDSCH physical channel, to support to carry the TPC order; Simultaneously, need not carry the TPC order that is used for the control of ascending control channel HS-SICH closed power on the HS-SCCH channel.But, be dynamic assignment owing to carry out the downlink traffic channel HS-PDSCH of HARQ when retransmitting, the method through HS-PDSCH channel bearing TPC order with carry out first that some was different when HARQ transmitted, comprising:
If with a HS-PDSCH channel bearing TPC order; Then system can a kind of system of selection of predefine; As: if many HS-PDSCH channels are arranged, select the minimum HS-PDSCH channel of numbering on the minimum time slot of numbering to carry the TPC order, this channel uses the time slot format that increases newly.
If on all HS-PDSCH channels, all carry one but identical TPC order, then all channels all use the time slot format that increases newly.
If carry out HARQ when retransmitting, the HS-PDSCH channel resource of authorizing through HS-SCCH is the part in the pre-configured HS-PDSCH channel resource, and the TPC order bearing method that then also can be used for pre-configured HS-PDSCH channel configuration carries the TPC order.
It is to be noted; In this step, the TPC order of carrying through downlink traffic channel HS-PDSCH or down control channel HS-SCCH is used for the closed power control procedure with the ascending control channel HS-SICH of corresponding HS-PDSCH or HS-SCCH channel-associated.
When end side is carried out closed power control to ascending control channel HS-SICH; Corresponding and above-mentioned network side sends the method for the TPC order that is used for the control of ascending control channel HS-SICH closed power; On downlink traffic channel HS-PDSCH or down control channel HS-SCCH, receive the TPC order, be used for closed power control procedure with the ascending control channel HS-SICH of corresponding HS-PDSCH or HS-SCCH channel-associated.The terminal orders the HS-SICH channel emission power that increases or reduce the preset power step-length to be used for HS-SICH channels transmit next time according to TPC.The preset power step-length is disposed to the terminal through high-level signaling by network side.
The invention provides a kind of Poewr control method of ascending control channel; When utilizing the descending scheduling transmission; The corresponding relation of downlink traffic channel and ascending control channel; Carry the closed loop power control command of ascending control channel through downlink traffic channel, strengthened the bearing method of the closed loop power control command of ascending control channel, removed when carrying the closed loop power control command of ascending control channel mission need down control channel through down control channel; Thereby reduced the expense of emission of downlink control channel and generation thereof, improved system effectiveness.
This method is applicable to but is not limited to the TD-SCDMA system.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, 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. the Poewr control method of an ascending control channel is characterized in that, may further comprise the steps:
Step S302; The incidence relation of collocating uplink control channel and downlink traffic channel or down control channel; Wherein, during for HARQ transmission first, do not send said downlink traffic channel resource through said down control channel mandate; And use pre-configured said downlink traffic channel resource, then said ascending control channel configuration to be associated with at least one said pre-configured downlink traffic channel;
Step S304 according to the incidence relation of said configuration, carries the closed loop power control command of said ascending control channel at said downlink traffic channel or said down control channel, said ascending control channel is carried out closed power control.
2. the Poewr control method of ascending control channel according to claim 1; It is characterized in that; The incidence relation of said ascending control channel and said downlink traffic channel resource when pre-configured downlink traffic channel and the uplink control channel resource, sends to terminal through high-level signaling by network side.
3. the Poewr control method of ascending control channel according to claim 1; It is characterized in that; In said step S302: when retransmitting for HARQ; Transmission has said downlink traffic channel resource through the down control channel mandate, and said downlink traffic channel resource through the down control channel mandate do not belong to pre-configured said downlink traffic channel resource, and then said ascending control channel configuration is corresponding one by one with said down control channel.
4. the Poewr control method of ascending control channel according to claim 1; It is characterized in that; In said step S302: for when said HARQ retransmits; Transmission has said downlink traffic channel resource through the down control channel mandate, and said downlink traffic channel resource through the down control channel mandate belongs to pre-configured said downlink traffic channel resource, and then the ascending control channel configuration is associated with at least one said pre-configured downlink traffic channel resource.
5. according to the Poewr control method of each described ascending control channel of claim 1 to 4, it is characterized in that said down control channel or said pre-configured downlink traffic channel are associated with at least one said ascending control channel.
6. the Poewr control method of ascending control channel according to claim 5; It is characterized in that; In said step S304:, then said ascending control channel is carried out closed power control if carry out time interval between professional transmission of descending scheduling or the professional transmission of said descending scheduling at the appointed time continuously less than the threshold value that pre-sets.
7. the Poewr control method of ascending control channel according to claim 5; It is characterized in that; In said step S304:, then on said down control channel, carry closed loop power control command if the ascending control channel configuration is corresponding one by one with down control channel.
8. the Poewr control method of ascending control channel according to claim 5; It is characterized in that; In said step S304: if down control channel distributes perhaps prewired many downlink traffic channel resources that are equipped with, a selection wherein downlink traffic channel perhaps uses many downlink traffic channel to carry closed loop power control commands.
9. the Poewr control method of ascending control channel according to claim 8 is characterized in that, selection mode comprise following one of at least:
Network side selects a downlink traffic channel to carry said closed loop power control command, and the result of said selection is sent to the terminal through high-level signaling; And select the minimum downlink traffic channel of numbering on the minimum time slot of numbering to carry said closed loop power control command.
10. the Poewr control method of ascending control channel according to claim 8; It is characterized in that; Use down control channel to distribute or many pre-configured downlink traffic channel carrying closed loop power control commands; Transmitting terminal all sends same closed loop power control command on every downlink traffic channel, and receiving terminal is merged into a closed loop power control command after many downlink traffic channel receive closed loop power control command.
11. the Poewr control method according to each described ascending control channel of claim 6 to 10 is characterized in that, the downlink traffic channel of said carrying closed loop power control command is used the time slot format of supporting to carry closed loop power control command.
12. the Poewr control method according to claim 2 or 9 described ascending control channels is characterized in that, said high-level signaling comprises: system broadcast information or radio resource control signaling message.
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| CN110167126B (en) * | 2018-02-13 | 2020-07-03 | 电信科学技术研究院有限公司 | Control method and device for PUCCH power during multi-beam transmission |
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