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Method and device for implementing constant dispatching

An implementation method and technology for scheduling resources, which are applied in the field of the implementation method and device of constant scheduling, can solve the problems of large retransmission interval, weakened retransmission data validity, and increase HARQ timing complexity, and achieve short retransmission interval and simplified retransmission. Effects of HARQ Timing

Inactive Publication Date: 2010-12-29
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For services with constant scheduling, according to their service characteristics, their data has a certain delay sensitivity, and too long retransmission delay will cause the retransmission data to lose validity
In a TDD system, under different ratios of uplink / downlink subframe numbers, the retransmission interval of each subframe is different, which increases the complexity of HARQ timing; and the retransmission interval of some subframes is relatively large, resulting in retransmission Data validity is weakened

Method used

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  • Method and device for implementing constant dispatching
  • Method and device for implementing constant dispatching
  • Method and device for implementing constant dispatching

Examples

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example 1

[0055] Figure 7 It is a schematic diagram of division of downlink constant scheduling areas and data transmission according to an embodiment of the present invention when the ratio of downlink / uplink subframes is 6:2, as shown in Figure 7 As shown, when the downlink-uplink ratio is 6:2, the maximum downlink constant scheduling ranges are SF1, SF2, and SF3. For the data packet sent by the base station on subframe SF1, the terminal feeds back on SF6 under the condition of receiving delay. After receiving the NACK feedback, the base station can repeat the packet on SF 1 of the next wireless frame under the condition of meeting the transmit delay. In this way, the guaranteed retransmission interval RTT is 8 subframes, that is, the duration of one radio frame. Similarly, for the data packet sent by the base station on subframe SF2, the terminal feeds back the data packet on SF6 under the condition of receiving delay. In this way, the guaranteed retransmission interval RTT is 8 ...

example 2

[0058] Figure 8 It is a schematic diagram of the maximum constant downlink scheduling range and transmission data when the downlink / uplink subframe ratio is 5:3 according to an embodiment of the present invention, as shown in Figure 8 As shown, when the downlink-uplink ratio is 5:3, the maximum downlink constant scheduling range is SF0, SF1, SF2, and SF3. For the data packet sent by the base station on subframe SF0, the terminal feeds back on SF5 under the condition of receiving delay. After receiving the NACK feedback, the base station can retransmit it on SF0 of the next wireless frame under the condition of meeting the transmit delay. , so that the guaranteed retransmission interval RTT is 8 subframes, that is, the duration of one radio frame. Similarly, for the data packet sent by the base station on subframe SF1, the terminal also feeds back on SF5 if the receiving delay condition is met. After receiving the NACK feedback, the base station can send the data packet in t...

example 3

[0060] Figure 9 It is a schematic diagram of the maximum constant downlink scheduling range and transmission data under the condition that the downlink / uplink subframe ratio is 4:4 according to an embodiment of the present invention, as shown in Figure 9 As shown, when the downlink-uplink ratio is 4:4, the maximum downlink constant scheduling range is SF0, SF1, SF2, and SF3. For the data packets sent by the base station on subframes SF0 to subframe SF3, the terminal feeds back on SF4 to SF7 under the condition of receiving delay. The subframe SF0 to subframe SF3 of the frame are retransmitted. In this way, the guaranteed retransmission interval RTT is 8 subframes, that is, the duration of one radio frame.

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Abstract

The invention discloses a method and a device for implementing constant dispatching. The method comprises the following steps of: determining a constant dispatching area from a constant dispatching range according to the period of a constant dispatching service; determining a dispatching resource in the constant dispatching area; and carrying out data transmission by using the dispatching resource, wherein the constant dispatching range is limited to subframes which have intervals with the length of a ratio frame and the same transmission directions in a plurality of ratio frames, and the position and the size of the dispatching resource are both fixed in the constant dispatching area. Through the invention, the HARQ (Hybrid Automatic Repeat reQuest) timing is simplified, and the retransmission interval is the shortest.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method and device for realizing constant scheduling. Background technique [0002] In the Long Term Evolution (LTE) system of the 3rd Generation Partnership Project (3GPP), and the World Interoperability for Microwave Access (WiMAX) In the system, a Persistent Scheduling (Persistent Scheduling) technology and a Hybrid Automatic Retransmission Request (HARQ for short) technology are introduced. [0003] Persistent Scheduling means that the base station periodically allocates transmission resources to fixed users within a certain time range to adapt to certain periodic services with fixed payload sizes, for example, Voice over Internet (Voice over Internet) Protocol, referred to as VoIP) business. Through constant scheduling, system overhead caused by resource mapping information can be saved. During the valid period of constant scheduling, the resource and modulation and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04L1/18H04L1/16
CPCH04W72/0446H04L1/0656H04W28/04
Inventor 王军虎王文焕
Owner ZTE CORP