Uplink/downlink retransmission method and system based on wireless communication time division duplex system

A time-division duplex system and wireless communication technology, applied in wireless communication, using return channels for error prevention/detection, electrical components, etc., can solve problems such as no retransmission solutions for uplink data or downlink data, and achieve realization The effect of retransmission
CN101499884BInactive Publication Date: 2013-05-08ZTE CORP
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2013-05-08
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses upstream and downstream data retransmitting methods and systems, and in the downstream data retransmitting method, a mapping relationship between an upstream physical frame and a downstream physical frame group is preliminarily configured; wherein, each downstream physical frame group comprises two adjacent downstream physical frames, and each downstream transmission blockis equally divided into four downstream physical frame groups; a base station sends one or more data sub-packages to one or more terminals by using the downstream physical frame group of the downstream transmission blocks; the terminal demodulates the received data sub-packages of the downstream physical frame group; according to the demodulating result and the mapping relationship, the terminal sends a response message that represents whether the data sub-package demodulation succeeds by using the corresponding upstream physical frame of upstream transmission blocks after the downstream transmission blocks; the base station demodulates the response message and judges whether the data sub-package demodulation succeeds according to the response message, and for the downstream physical frame group with failed data sub-package demodulation, the base station sends a retransmitting data sub-package of the data sub-package with failed demodulation in the next corresponding downstream physical frame group of the downstream transmission blocks.
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Description

technical field

[0001] The present invention relates to a wireless communication system, in particular to an uplink / downlink retransmission method and system based on a wireless communication time division duplex (Time Division Duplex, TDD for short) system. Background technique

[0002] In a wireless system that transmits data in units of superframes, the up / down link of wireless air interface transmission generally transmits data in units of superframes; each superframe consists of a preamble (preamble) and several PHYs Frame (physical frame); preamble and PHY Frame are composed of OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) Symbol (symbol) as the basic unit.

[0003] The current UMB (Ultra Mobile Broadband, ultra-mobile broadband), LTE (Long-Term Evolution, long-term evolution), Wimax (Worldwide Interoperability for Microwave Access, microwave access global interoperability) systems have two duplex modes, namely, FDD ( Fr...

Claims

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