CN101179751B - Method for distributing a plurality of power control instruction through virtual scheduling - Google Patents
Method for distributing a plurality of power control instruction through virtual scheduling Download PDFInfo
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- CN101179751B CN101179751B CN200610146137A CN200610146137A CN101179751B CN 101179751 B CN101179751 B CN 101179751B CN 200610146137 A CN200610146137 A CN 200610146137A CN 200610146137 A CN200610146137 A CN 200610146137A CN 101179751 B CN101179751 B CN 101179751B
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- time interval
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- control instruction
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Abstract
The invention discloses a method for distributing a plurality of power control instructions via the virtual scheduling, which is characterized in that the invention comprises the following steps: step 1: the base station collocates the service sources and continuously distributes power control instructions; step 2: the base station distributes the confirmed or disconfirmed message to the terminal. The method can make full use of the current practice of transmitting one power control instruction within a transmission time interval to realize the distribution of a plurality of power control instructions within a longer transmission time interval, which increases the power control accuracy and system throughput and is conducive to realization within the framework of the prior technology.
Description
Technical field
The present invention relates to the wireless communication technique field, particularly relate to a kind of method that issues a plurality of power control instructions by virtual scheduling in the TDD system.
Background technology
In HSUPA (high speed uplink packet access) technology scheduling feature is transferred to NodeB (base station), can use the information on load of sub-district more accurate and in real time, utilize the ascending idle port resource more fully.Business based on the NodeB scheduling is called dispatching services, before UE (terminal) the transmission data, send dispatch request by E-RUCCH (E-DCH inserts ascending control channel at random) channel earlier, see Fig. 1, NodeB is the UE Resources allocation according to the dispatch request of UE and the resource situation of sub-district, and at time point 101 resource (comprising code channel, time slot, power) of authorizing is sent to UE by E-AGCH (E-DCH absolute grant channel) channel, issue a power control instruction TPC simultaneously, control strengthens the power lifting that uplink physical channel E-PUCH sends next time.For a Transmission Time Interval, the each scheduling of NODE-B only issues a power control instruction by E-AGCH, the TDD system is the frame length (or subframe lengths) that the TDD system adopts in a kind of possible minimum transfer time interval, as 5ms, another kind of possible Transmission Time Interval is the integral multiple of the frame length (or subframe lengths) of TDD system employing, as 20ms.In the moment 102, UE sends data by the E-PUCH channel, and in 103 end data transmission constantly.
Receive the E-PUCH channel data of UE as NodeB after, the physical layer of NodeB is decoded, and decoded information fed back to upper strata MAC-e (enhancing medium access control entity) entity, be responsible for producing ACK (affirmation) or NACK (not confirming) indication by the MAC-e entity, and on E-HICH (E-DCH hybrid automatic repeat request indication channel) channel, indication is sent to UE, after UE receives ACK, can abandon original grouping, carry out the transmission of new data; If that receive is NACK, need to wait for that authorization resources retransmits again.
The timing relationship of dispatching services is as shown in Figure 1: after UE receives the E-AGCH authorization message, behind timing T1, send data, behind timing T2,104 receiving that the HARQ of NodeB indicates constantly after sending data, if that receive is NACK, again at the moment 105 data retransmissions, the stand-by period was T3 after the absolute grant of will waiting for UE arrived; If that receive is ACK, UE will abandon this data block, empty relevant HARQ process, wait for authorizing next time and carry out the transmission of new data again.Wherein T1, T2 have clear and definite timing relationship, and T3 is variable, depend on the scheduling of NodeB.
The problem that the existing technology that issues exists is: NodeB (comprises code channel by E-AGCH (E-DCH absolute grant channel) channel to the UE down distributing resource, time slot, power) in the process of Shou Quaning, only issue a power control instruction, because the minimum time unit that an E-AGCH scheduling is suitable for is a TTI (Transmission Time Interval), this is for TTI cycle and the identical situation of frame length (or subframe lengths), as 5ms TTI, be rational, but be long (or subframe lengths) the identical situation of several tdd frames for length, as 20ms TTI, in order to reach better power control effect, need in a TTI, issue a plurality of TPC, but present technology can not be supported this function, has limited the further raising of throughput of system.
Summary of the invention
In view of this, the technical problem to be solved in the present invention has been to provide a kind of and has issued the method for a plurality of power control instructions by virtual scheduling, thereby further improves throughput of system, satisfies the needs of practical application.
This method comprises the steps:
Step 1: the base station is distributed service resources and is issued power control instruction continuously;
Step 2: the base station issue confirm or not confirmation give terminal.
Further, said method also has following characteristics: described step 1 further comprises the steps:
Step 1.1: the base station uses the short time interval scheduling flow business of using long-time interval to be carried out resource allocation and issue the 1st power control instruction;
Step 1.2: short time interval scheduling flow the 2nd power control instruction of sending down service to using long-time interval used in the base station;
Step 1.3: the base station repeat the 2nd step to the last a power control instruction issue and finish.
Further, said method also has following characteristics: described short time interval scheduling flow specifically is meant under the situation of frame length that Transmission Time Interval adopts for the TDD system or subframe lengths, issues the process of a power control instruction.
Further, said method also has following characteristics: described long-time interval is specially the frame length of TDD system employing or the integral multiple of subframe lengths.
Further, said method also has following characteristics: described step 2 further comprises:
If terminal is received confirmation, then abandon original grouping, carry out the transmission of new data;
If terminal is received not confirmation, need then to wait for that authorization resources retransmits again.
In sum, the present invention can fully use the existing mode that issues a power control instruction in a Transmission Time Interval and be implemented in a longer transmission and issue a plurality of power control instructions in the time interval, improved power control precision and throughput of system, be convenient in the prior art framework, realize.
Description of drawings
Fig. 1 is existing power control instruction delivery method schematic diagram;
Fig. 2 is the flow chart of steps of the inventive method;
Fig. 3 is the power control instruction delivery method schematic diagram in the virtual scheduling of the present invention;
Fig. 4 is the embodiments of the invention schematic diagrames.
Embodiment
Below with reference to accompanying drawing, core concept of the present invention and each preferred embodiment are carried out further detailed description and explanation.
The invention provides and a kind ofly issue the method for a plurality of power control instructions by virtual scheduling, its core concept is: fully use the existing mode that issues a power control instruction in a Transmission Time Interval and be implemented in a longer transmission and issue a plurality of power control instructions in the time interval.
Fig. 2 is the flow chart of steps of the inventive method, and as shown in Figure 2, the inventive method comprises 2 steps:
Step 1: the base station is distributed service resources and is issued power control instruction continuously;
Step 2: the base station issue confirm or not confirmation give terminal.
Fig. 3 is the power control instruction delivery method schematic diagram in the virtual scheduling of the present invention, below in conjunction with Fig. 3 the inventive method is explained in further detail.
(1) base station uses existing short transmission time interval scheduling flow shown in Figure 1 the business of using long-time interval to be carried out resource allocation and issue the 1st power control instruction 201. when the short transmission time interval is 5ms, for Transmission Time Interval is the situation of 20msTTI, just use scheduling step shown in Figure 1 in first subframe (5ms), but, the difference of this step and Fig. 1 is: after carrying out the resource allocation first time and sending the 1st power control instruction 201, NodeB does not send ACK or NACK signal at the E-HICH channel, UE does not receive ACK or NACK signal from the E-HICH channel yet, and NodeB and UE entered for the 2nd step;
(2) existing short time interval scheduling flow the 2nd power control instruction of sending down service to using long-time interval used in the base station.In this step the inside, the base station only uses E-AGCH channel shown in Figure 1 to send the 2nd power control instruction 202, is not sent in other resource allocation information that step 1 has sent.The base station is after receiving the data of sending from the E-PUCH channel and at least one time slot of delaying time, E-AGCH channel in the descending time slot in being arranged in this frame sends the 2nd power control instruction 202 to UE, UE receives after the 2nd power control instruction 202, delay time is δ, with identical time slot that the first step is used in the E-PUCH channel on send data once more, enter step 3 then;
(3) base station was repeated for the 2nd step and is issued up to needed power control instruction 203,204 and to finish;
(4) base station issues and connects ACK (perhaps NACK) signal 205.
Fig. 4 is the embodiments of the invention schematic diagrames, below with reference to Fig. 4 and Fig. 3 the present invention further specified, as shown in Figure 4:
Fundamental system of supporting the high speed uplink business comprises at least one base station 301 and at least two terminal 302a and 302b.After terminal terminal 302a or the request of 302b initiation dispatching services, dispatch request is carried out moving speed estimation and signal interference ratio is estimated according to sending from E-RUCCH (E-DCH inserts ascending control channel at random) channel in base station 301, the terminal low to signal interference ratio and translational speed is fast, as terminal 201a, the base station is the TTI of 5ms for its designated length, this TTI configuration information and other resource allocation information, as power control information, send to terminal 201a by the E-AGCH channel together, terminal 201a then finishes the data in the 5ms TTI and sends after the E-HICH channel receives ACK.
To signal interference ratio height and the slow terminal of translational speed, as terminal 201b, the base station is the TTI of 20ms for its designated length, this TTI configuration information and other resource allocation information, comprise the TPC of power control for the first time information, send to terminal 201b by the E-AGCH channel that designs for 5ms TTI scheduling together, thereby realized that TPC sends for the first time.The process of transmitting of the 1st schedule information of this of terminal 201b is identical with terminal 201a, but with to the scheduling of terminal 201 different be: after terminal 201b finishes the transmission of data A, the base station does not send ACK information, but next sending TPC for the first time, the something in common that sends TPC this 2nd time and send TPC for the 1st time is: all use identical channel to send TPC with identical time slot twice; The difference that sends TPC for this 2nd time and send TPC for the 1st time is: only send TPC information the 1st time, do not comprise other resource allocation information, except the renewal of power control information, terminal 201b uses the 1st time schedule information to carry out work, and therefore current scheduling is a virtual scheduling.It is identical with the 2nd that this 3rd time, the 4th send TPC, and after the 4th sent TPC, the base station used the E-HICH channel to send ACK information to terminal 201b, and the data of finishing in the 20msTTI send.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (4)
1. one kind issues the method for a plurality of power control instructions by virtual scheduling, it is characterized in that this method comprises the steps:
Step 1: the base station is distributed service resources and is issued power control instruction continuously; Described step 1 further comprises the steps:
Step 1.1: the base station uses the short time interval scheduling flow business of using long-time interval to be carried out resource allocation and issue the 1st power control instruction;
Step 1.2: short time interval scheduling flow the 2nd power control instruction of sending down service to using long-time interval used in the base station;
Step 1.3: the base station repeat the 2nd step to the last a power control instruction issue and finish;
Step 2: the base station issue confirm or not confirmation give terminal.
2. a kind of method that issues a plurality of power control instructions by virtual scheduling according to claim 1, it is characterized in that, described short time interval scheduling flow specifically is meant under the situation of frame length that Transmission Time Interval adopts for the TDD system or subframe lengths, issues the process of a power control instruction.
3. according to claim 1ly a kind ofly issue the method for a plurality of power control instructions by virtual scheduling, it is characterized in that, described long-time interval is specially the frame length that the TDD system adopts or the integral multiple of subframe lengths.
4. according to claim 1ly a kind ofly issue the method for a plurality of power control instructions, it is characterized in that described step 2 further comprises by virtual scheduling:
If terminal is received confirmation, then abandon original grouping, carry out the transmission of new data;
If terminal is received not confirmation, need then to wait for that authorization resources retransmits again.
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| US10075970B2 (en) * | 2015-03-15 | 2018-09-11 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
| US9936519B2 (en) | 2015-03-15 | 2018-04-03 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure for wireless communications |
| US9992790B2 (en) | 2015-07-20 | 2018-06-05 | Qualcomm Incorporated | Time division duplex (TDD) subframe structure supporting single and multiple interlace modes |
| CN108781151B (en) * | 2016-03-10 | 2021-06-11 | 瑞典爱立信有限公司 | Short transmission time intervals in time division duplex downlink and uplink subframes |
| WO2017193351A1 (en) * | 2016-05-12 | 2017-11-16 | 华为技术有限公司 | Signal transmission method and terminal |
| CN107690160B (en) * | 2016-08-05 | 2019-01-08 | 上海朗帛通信技术有限公司 | A kind of method and apparatus in wireless communication |
| CN108282881B (en) | 2017-01-06 | 2020-12-15 | 华为技术有限公司 | Resource allocation method and device |
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Non-Patent Citations (4)
| Title |
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| 吴迪,陈翠.HSDPA系统中基于QoS的最优重传功率方案的研究.中国无线电 4.2006,(4),50-54. |
| 吴迪,陈翠.HSDPA系统中基于QoS的最优重传功率方案的研究.中国无线电 4.2006,(4),50-54. * |
| 胡建村,张萌,陈滔,杨大成.HSUPA技术及其发展.电信科学21 7.2005,21(7),49-53. |
| 胡建村,张萌,陈滔,杨大成.HSUPA技术及其发展.电信科学21 7.2005,21(7),49-53. * |
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