Communication system and method for constant-scheduling hybrid automatic retransmission

A hybrid automatic retransmission and retransmission technology, which is applied in the field of communication, can solve the problems of increased data packets and high overhead, and achieve the effects of avoiding transmission errors, improving accuracy, and reducing resource overhead

Inactive Publication Date: 2010-06-09
ZTE CORP
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Problems solved by technology

[0004] In the 802.16e protocol, for retransmission under constant scheduling, the asynchronous HARQ method is adopted. In this way, new data packets of constant scheduling do not need mapping information indication, but each retransmission packet still needs mapping information to indicate resource allocation and modulation Encoding method and other information, if the number of retransmitted data packets increases, it will cause relatively large overhead

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  • Communication system and method for constant-scheduling hybrid automatic retransmission
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  • Communication system and method for constant-scheduling hybrid automatic retransmission

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Embodiment Construction

[0055] The main concept of the present invention is: the base station sets a constant scheduling area and each retransmission area, the sending end sends a new data subburst in the constant scheduling area, retransmits the constant scheduling area or the last retransmission area in each retransmission area Failed subburst. The start or end position of each retransmission area is fixed. For uplink HARQ, the terminal is the sending end, and the base station is the receiving end; for downlink HARQ, the base station is the sending end, and the terminal is the receiving end.

[0056] Preferred embodiment of the present invention is illustrated below in conjunction with accompanying drawing:

[0057] This embodiment provides a communication system for constant scheduling HARQ, such as figure 2 As shown, it includes: a setting module, a retransmission mapping module, a sending end and a receiving end; when uplinking, the terminal is used as the sending end, and the base station is...

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Abstract

The invention provides a communication system and a method for constant-scheduling hybrid automatic retransmission. A base station sets positional information of a constant-scheduling region and a first-retransmission region and informs a terminal of the positional information; a sending end sends new sub-burst to the terminal in the constant-scheduling region; the sub-burst of last wireless frame unsuccessfully sent in the constant-scheduling region is retransmitted in the first-retransmission region; and the positional information is fixed in at least one scheduling region. Due to the technical scheme of the invention, the base station fixes starting positions or end positions of retransmission regions when setting each retransmission region, thereby leaving out the offset of designating the starting position of a transmission region, reducing resource cost and avoiding data sub-burst transmission errors caused by factor transmission errors so as to improve the accuracy of data transmission.

Description

technical field [0001] The present invention relates to the communication field, in particular to a communication system and method for constant scheduling hybrid automatic retransmission. Background technique [0002] Hybrid Automatic Retransmission Request (HARQ for short) is a technology jointly used by Automatic Retransmission Request (ARQ for short) and Forward Error Correction (FEC for short). [0003] In 802.16e, Persistent Allocation is defined, that is, time-frequency resource blocks are periodically allocated to fixed users within a certain time range to adapt to certain periodic services with fixed payload sizes (such as VoIP), which can save system overhead caused by resource mapping information. The resources and modulation and coding modes of the constant scheduling remain unchanged during the effective period of the constant scheduling, until the constant allocation is cancelled. Such as figure 1 As shown, one radio frame is composed of 8 subframes, and the...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L1/16
Inventor 王军虎孙长印刘敏姚珂吕开颖
Owner ZTE CORP
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