CN101442795A - 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.At 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, by 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, improves 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 at certain UE, UE receives the HS-PDSCH channel according to this control information, and the reception condition feedback information that sends the HS-PDSCH channel on a HS-SICH channel of this HS-SCCH correspondence 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 mutually 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 by 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 by carrying TPC order on HS-SCCH.
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 for IMS (IPMultimedia Core Network Subsystem, IP Multimedia System) real time business is still more considerable such as VoIP (Voice over IP, IP phone).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, as fixing or more pre-configured parameters, more pre-configured HS-PDSCH physical channel resources, and, make the transmission of HARQ first of this class business need not send HS-SCCH in conjunction with the blind Detecting technology, 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 terminal receives packet, need be according to reception condition, send HS-SICH feedback HARQ ACK/NACK (acknowledgement/non-acknowledgement) information and give NodeB, transmission HS-SICH feeds back HARQ ACK information to NodeB when perhaps receiving successfully, and does not send HS-SICH when taking defeat; In the NodeB side, for the packet of each transmission,, then give terminal by 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 invention provides a kind of Poewr control method of ascending control channel, solve in the HS-SCCH-less method and can not carry out closed power control problem to ascending control channel by carrying closed loop power control command on down control channel.
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 by 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 by the down control channel mandate, and the downlink traffic channel resource by 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 by the down control channel mandate, and the downlink traffic channel resource by the down control channel mandate belongs to pre-configured downlink traffic channel resource, and then 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 by high-level signaling by network side.
In step S304:, then 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 descending scheduling at the appointed time continuously less than the threshold value that pre-sets.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 carrying closed loop power control commands.Can select a downlink traffic channel carrying closed loop power control command by network side, and the object information of selecting is sent to terminal by high-level signaling; Also can select to number a downlink traffic channel carrying closed loop power control command of the numbering minimum on the minimum time slot.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.
Wherein, the downlink traffic channel of carrying closed loop power control command is used the time slot format of supporting the carrying 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, closed loop power control command by downlink traffic channel carrying ascending control channel, strengthened the bearing method of the closed loop power control command of ascending control channel, when having removed the closed loop power control command by down control channel carrying ascending control channel to the mission need of 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 schematic diagram in the existing TD-SCDMA system;
Fig. 2 is the timing relationship schematic diagram 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 schematic diagram that has HS-PDSCH physical channel in the HSDPA technology in the TD-SCDMA system now;
Fig. 5 is a kind of burst structure schematic diagram according to HS-PDSCH physical channel of the present invention; And
Fig. 6 is the another kind of burst structure schematic diagram according to HS-PDSCH physical channel of the present invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
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, the HS-SCCH-less method is different with common HSDPA technology in the TD-SCDMA system, and HS-SICH can't be all the time and the corresponding one by one related use of HS-SCCH.In the HS-SCCH-less method, if carrying out HARQ retransmits, have HS-SCCH to authorize the HS-PDSCH channel resource, then HS-SICH subsequently can with the corresponding one by one related use of HS-SCCH, 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 with one or more of being associated wherein, its incidence relation by network side when pre-configured HS-PDSCH channel and the HS-SCIH channel resource, by high-level signaling, comprise that system broadcast information or RRC (Radio Resource control) signaling message sends to terminal.When retransmitting for HARQ, the HS-PDSCH channel resource of authorizing by 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 by high-level signaling, comprises that broadcast transmission or terminal-specific signaling message send to 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 sends to terminal by downlink traffic channel HS-PDSCH carrying TPC order, is used for carrying out the closed power control of ascending control channel HS-SICH.Terminal is ordered the HS-SICH channel emission power that increases or reduce the predetermined power step-length according to the TPC that carries on the HS-PDSCH channel, and the predetermined power step-length is disposed to terminal by high-level signaling by network side; The HS-PDSCH channel resource of Shi Yonging is to adopt pre-configured method to be distributed by network side and send to terminal in such cases.
In this case, compare with existing HSDPA technology in the TD-SCDMA system, because the time slot format of the HS-PDSCH physical channel in the existing HSDPA technology, corresponding burst format 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 carrying TPC order, if consider that different modulation systems is (as QPSK, 16QAM), need to increase the time slot format of the HS-PDSCH physical channel under the different modulating mode.Simultaneously, because a TTI may be assigned many HS-PDSCH physical channels (code channel), and in fact only need a TPC order to need carrying, bearing method can have:
For pre-configured one or more of 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 broadcast transmission or terminal-specific signaling message send to 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 a HS-PDSCH channel of the numbering minimum on the minimum time slot of numbering to carry this TPC order.
For pre-configured one or more of 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 needs to give terminal by down control channel HS-SCCH dynamic assignment mandate downlink traffic channel HS-PDSCH resource.Therefore, network side can carry the TPC order by HS-SCCH and send to terminal, is used for carrying out the closed power control of ascending control channel HS-SICH.Terminal is ordered the HS-SICH channel emission power that increases or reduce the predetermined power step-length according to the TPC that carries on the HS-SCCH channel, and the predetermined power step-length is disposed to terminal by 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 by 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 carrying 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 by 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 HS-PDSCH channel of the numbering minimum on the minimum time slot of numbering to carry the TPC order, this channel uses the time slot format that increases newly.
If all carry one but identical TPC order on all HS-PDSCH channels, 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 by HS-SCCH is the part in the pre-configured HS-PDSCH channel resource, then also can use the TPC order bearing method for pre-configured HS-PDSCH channel configuration to carry the TPC order.
It is to be noted, in this step, the TPC order by downlink traffic channel HS-PDSCH or down control channel HS-SCCH carrying is used for the closed power control procedure of the ascending control channel HS-SICH that is associated with HS-PDSCH or HS-SCCH channel accordingly.
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 the closed power control procedure of the ascending control channel HS-SICH that is associated with HS-PDSCH or HS-SCCH channel accordingly.Terminal orders the HS-SICH channel emission power that increases or reduce the predetermined power step-length to be used for HS-SICH channels transmit next time according to TPC.The predetermined power step-length is disposed to terminal by 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, closed loop power control command by downlink traffic channel carrying ascending control channel, strengthened the bearing method of the closed loop power control command of ascending control channel, when having removed the closed loop power control command by down control channel carrying ascending control channel to the mission need of 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 the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
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; And
Step S304 according to the incidence relation of described configuration, carries the closed loop power control command of described ascending control channel at described downlink traffic channel or described down control channel, described 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, in described step S302: during for HARQ transmission first, do not send described downlink traffic channel resource by described down control channel mandate, and use pre-configured described downlink traffic channel resource, then described ascending control channel configuration is associated with at least one described pre-configured downlink traffic channel.
3. the Poewr control method of ascending control channel according to claim 2, it is characterized in that, the incidence relation of described ascending control channel and described downlink traffic channel resource when pre-configured downlink traffic channel and the uplink control channel resource, sends to terminal by high-level signaling by network side.
4. the Poewr control method of ascending control channel according to claim 1, it is characterized in that, in described step S302: when retransmitting for HARQ, transmission has described downlink traffic channel resource by the down control channel mandate, and described downlink traffic channel resource by the down control channel mandate does not belong to pre-configured described downlink traffic channel resource, and then described ascending control channel configuration is corresponding one by one with described down control channel.
5. the Poewr control method of ascending control channel according to claim 1, it is characterized in that, in described step S302: for when described HARQ retransmits, transmission has described downlink traffic channel resource by the down control channel mandate, and described downlink traffic channel resource by the down control channel mandate belongs to pre-configured described downlink traffic channel resource, and then the ascending control channel configuration is associated with at least one described pre-configured downlink traffic channel resource.
6. according to the Poewr control method of each described ascending control channel of claim 2 to 5, it is characterized in that described down control channel or described pre-configured downlink traffic channel are associated with at least one described ascending control channel.
7. the Poewr control method of ascending control channel according to claim 6, it is characterized in that, in described step S304:, then described 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 described descending scheduling at the appointed time continuously less than the threshold value that pre-sets.
8. the Poewr control method of ascending control channel according to claim 6, it is characterized in that, in described step S304:, then on described down control channel, carry closed loop power control command if the ascending control channel configuration is corresponding one by one with down control channel.
9. the Poewr control method of ascending control channel according to claim 6, it is characterized in that, in described step S304:, select wherein a downlink traffic channel or use many downlink traffic channel carrying closed loop power control commands if down control channel distributes or prewiredly is equipped with many downlink traffic channel resources.
10. the Poewr control method of ascending control channel according to claim 9 is characterized in that, selection mode comprise following one of at least:
Network side selects a downlink traffic channel to carry described closed loop power control command, and the result of described selection is sent to terminal by high-level signaling; And select a downlink traffic channel of the numbering minimum on the minimum time slot of numbering to carry described closed loop power control command.
11. the Poewr control method of ascending control channel according to claim 9, 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.
12. the Poewr control method according to each described ascending control channel of claim 7 to 11 is characterized in that, the downlink traffic channel of described carrying closed loop power control command is used the time slot format of supporting the carrying closed loop power control command.
13. the Poewr control method according to claim 3 or 10 described ascending control channels is characterized in that, described high-level signaling comprises: system broadcast information or radio resource control signaling message.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110167126A (en) * | 2018-02-13 | 2019-08-23 | 电信科学技术研究院有限公司 | The control method and device of PUCCH power when a kind of multi-beam transmission |
| CN110178416A (en) * | 2017-01-16 | 2019-08-27 | 高通股份有限公司 | The technology and equipment of power control for uplink channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ITMI20010721A1 (en) * | 2001-04-04 | 2002-10-04 | Siemens Inf & Comm Networks | METHOD TO OFFER PACKAGE SERVICES ON RADIO RESOURCES SHARED BY MULTIPLE USERS IN A TDD-CDMA SYSTEM |
| CN100373806C (en) * | 2005-11-02 | 2008-03-05 | 中兴通讯股份有限公司 | High speed shared control channels and method for realizing high speed shared information channel power |
| CN100568764C (en) * | 2007-02-01 | 2009-12-09 | 中兴通讯股份有限公司 | The method of the uplink closed loop in a kind of TD-SCDMA system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110178416A (en) * | 2017-01-16 | 2019-08-27 | 高通股份有限公司 | The technology and equipment of power control for uplink channel |
| CN110178416B (en) * | 2017-01-16 | 2022-03-01 | 高通股份有限公司 | Techniques and apparatus for power control of uplink channels |
| CN110167126A (en) * | 2018-02-13 | 2019-08-23 | 电信科学技术研究院有限公司 | The control method and device of PUCCH power when a kind of multi-beam transmission |
| 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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