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Timing method and device of hybrid automatic repeat request (HARQ)

A timing and time technology, applied in the field of HARQ timing methods and devices, can solve problems such as large delays, achieve the effect of increasing speed and avoiding too long waiting time

Inactive Publication Date: 2011-03-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The present invention is proposed to solve the problem of large delay in the HARQ timing method in the related art. Therefore, the main purpose of the present invention is to provide a HARQ timing method and device to solve at least one of the above problems

Method used

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  • Timing method and device of hybrid automatic repeat request (HARQ)
  • Timing method and device of hybrid automatic repeat request (HARQ)
  • Timing method and device of hybrid automatic repeat request (HARQ)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] This embodiment is applied to Tproc MS and / or Tproc BS It is a fixed value, and it is a scene of FDD mode.

[0051] Assuming that there are F subframes in one frame of the system, and the base station sends a data packet on the mth downlink subframe of the i-th frame, the terminal only needs to wait for a specific time Delay to give feedback instead of waiting for a fixed The subframe number of appears. According to the embodiment of the present invention, assuming that the terminal sends feedback information in the nth uplink subframe of the jth frame, the frame number j and the subframe number n at the time of feedback can be calculated by the following formula 1 and formula 2, so that the jth Send feedback information on the nth subframe of the frame:

[0052] j=i+floor((Delay+m) / F) (Formula 1)

[0053] n=(Delay+m)mod F (Formula 2)

[0054] Wherein, floor(x) refers to the smallest integer greater than x, and Delay is determined by at least one of terminal proces...

Embodiment 2

[0069] This embodiment is applied to Tproc MS and / or Tproc BS It is a variable value and is a scene of FDD mode.

[0070] The difference between this embodiment 2 and embodiment 1 is: Tproc MS and / or Tproc BS It is a variable value, and the size of the two needs to be indicated through indication signaling.

[0071] Tproc when the terminal processes data MS When the value is not fixed, the base station may send the first indication signaling in a control channel or a control message of the communication system, wherein the control channel includes a superframe header or an A-MAP channel, and the control message includes a capability negotiation message or A registration message, or, the terminal may send a second indication signaling in a capability negotiation message or a registration message of the communication system, and the above-mentioned first indication signaling and second indication signaling are used to indicate Tproc MS value of .

[0072] Time Tproc when t...

Embodiment 3

[0082] This embodiment is applied to Tproc MS and Tproc BS It is a fixed value or not fixed value, and it is a scene of FDD mode.

[0083] In the downlink HARQ timing, there are F subframes in one frame of the system, the base station sends a data packet on the mth downlink subframe of the i frame, and the terminal sends feedback information on the nth uplink subframe of the j frame. The frame number and subframe number when downlink HARQ sends feedback can be calculated by Table 4 and Formula 5:

[0084] Table 4

[0085]

[0086] (Formula 5)

[0087] Among them, N TTI Refers to the number of subframes corresponding to the transmission time interval TTI of the data packet, and Tproc refers to the time Tproc for the terminal to process data MS , this embodiment is just an example, and the value of this parameter can also take other values.

[0088] When the base station and the terminal process data time Tproc MS or Tproc BS When it is a fixed value, the time Tproc...

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Abstract

The invention discloses a timing method and device of a hybrid automatic repeat request (HARQ), wherein the method comprises the following steps: determining the feedback time according to the preset parameters, and then, sending a feedback message of the HARQ at the feedback time, wherein the preset parameters comprise at least one of time TprocMS of terminal processing data, time TprocBS of base station processing data, transmission time interval (TTI) and protective time P, thereby ensuring that a terminal or a base station can finish the HARQ feedback in a shortest time, preventing the waiting time of the feedback from being too long, and improving the speed of the HARQ feedback.

Description

technical field [0001] The present invention relates to the communication field, in particular to a HARQ timing method and device. Background technique [0002] A hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ for short) technology is an improvement on a traditional automatic repeat request (Automatic Repeat Request, short for ARQ) technology. HARQ technology combines ARQ technology and forward error correction (FEC) technology, thereby reducing the influence of time-varying fading channel on the bit error rate of received data, so that the wireless communication system can provide higher and more stable data throughput. HARQ is one of the key technologies of current mainstream 4G systems (for example, Long-Term Evolution (LTE for short) system and IEEE 802.16m system). [0003] In a frequency division duplex (Frequency Division Duplex, FDD for short) system, uplink / downlink can simultaneously transmit data or signals. In order to reduce the system ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
CPCH04L1/1812H04L1/1854H04L1/1851
Inventor 宁丁关艳峰刘向宇刘颖
Owner ZTE CORP
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