Determination method of downlink process number and device thereof

A technology for determining the method and process number, applied in the field of communication, can solve the problems of inconsistent downlink process numbers, inability to calculate the downlink process number, etc., and achieve the effect of reducing the data packet loss rate

Active Publication Date: 2012-03-28
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The embodiment of the present invention provides a method and device for determining the downlink process number, which solves the p

Method used

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  • Determination method of downlink process number and device thereof
  • Determination method of downlink process number and device thereof
  • Determination method of downlink process number and device thereof

Examples

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Effect test

Embodiment 1

[0106] Taking the FDD system as an example, assuming that the number of reserved processes is N=3, the period of SPS configuration is 32 subframes, and the SPS activation time is SFN=1018, subframe=5, then the downlink corresponding to each preconfigured DL SPS resource The HARQ process number is recycled according to the number of reserved processes, that is, process 0, process 1, and process 2 are recycled.

[0107] details as follows:

[0108] The HARQ downlink process number corresponding to the SPS activation moment (SFN=1018, subframe=5) is 0.

[0109] The HARQ downlink process number corresponding to the first pre-configured DL SPS resource (SFN=1021, subframe=7) is 1.

[0110] The HARQ downlink process number corresponding to the second preconfigured DL SPS resource (SFN=0, subframe=9) is 2.

[0111] The HARQ downlink process number corresponding to the third pre-configured DL SPS resource (SFN=4, subframe=1) is 0.

[0112] The HARQ downlink process number c...

Embodiment 2

[0119] Taking the TDD system as an example, assuming that the number of reserved processes is N=3, and the period configured by the SPS is 32 subframes, then the SPS period should be 30 subframes when the TDD system is actually used.

[0120] The activation time is SFN=1018, subframe=5, then each pre-configured DL SPS resource is calculated using the following DL SPS process number calculation formula:

[0121] HARQ Process ID = [floor(CURRENT_TTI / (Downlink Semi-Persistent Scheduling Interval))] modulo Number of Configured SPS Processes;

[0122] Among them, CURRENT_TTI = (SFN×10 + 1024×10×M) + subframe number;

[0123] SFN indicates the system frame number of the radio frame to which the subframe corresponding to the currently preconfigured downlink SPS resource belongs;

[0124] subframe number indicates the subframe number of the subframe corresponding to the currently preconfigured downlink SPS resource;

[0125] M represents the number of SFN number flips in the...

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Abstract

An embodiment of the invention discloses a determination method of a downlink process number and a device thereof. Through applying a technical scheme of the embodiment, starting from a downlink SPS (semi-persistent scheduling) activation subframe, a base station and a terminal device respectively determine downlink process numbers corresponding to each pre-configured downlink SPS resource in order, thus reasonable distribution of the process numbers are ensured, a data packet loss ratio is reduced, a situation that a downlink HARQ (hybrid automatic repeat request) process number which is calculated and obtained is inconsistent with an expected used process number caused by SFN (system frame number) overturn is avoided, and a packet loss situation caused by that a data packet can not be retransmitted also is solved.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to a method and device for determining a downlink process number. Background technique [0002] Two frame structures are supported in an LTE (Long Term Evolution, long term evolution) system. A system for FDD (Frequency Division Duplexing, frequency division duplexing), such as figure 1 As shown, it is a schematic diagram of the frame structure of the LTE FDD system in the prior art, and the other is used in a TDD (Time Division Duplexing, time division duplexing) system, such as figure 2 As shown, it is a schematic diagram of the frame structure of the LTE TDD system in the prior art. Regardless of the TDD or FDD system, the length of a radio frame is 10ms and includes 10 subframes. [0003] (System Frame Number, system frame number) corresponds to a wireless frame number for each wireless frame. The value of SFN is from 0 to 1023, that is, when the value of SFN reaches...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04W72/04
Inventor 赵亚利李国庆许芳丽
Owner DATANG MOBILE COMM EQUIP CO LTD
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