Low-delay parallel retransmission method and low-delay parallel retransmission device

Abstract

The invention discloses a low-delay parallel retransmission method and a low-delay parallel retransmission device, and belongs to the field of signal transmission. The low-delay parallel retransmission device comprises a queue transmitting module, a counter, a first receiving module and a first transmitting module, wherein the queue transmitting module stores transmission information, the counter counts information, the first receiving module receives feedback information, and the first transmitting module transmits the information. A receiving end comprises a second transmitting module, a second receiving module, a verifying module and a window dividing module, the second transmitting module transmits the feedback information, the second receiving module receives the information, and the verifying module verifies the information received by the second receiving module. The quantity of parallel data streams transmitted parallelly is set according to measured round-trip time of the information on an information transmission link, so that information retransmission interval is minimized, and retransmission delay is shortened. Besides, data are circularly and sequentially transmitted via transmission child windows, the purpose of parallelly transmitting the data is achieved, the data can be parallelly transmitted in a single process, and constitution and control of a parallel transmission implementing system are simplified.

Description

technical field [0001] The invention relates to the field of information transmission, in particular to a low-delay parallel retransmission method and device. Background technique [0002] In a modern wireless communication system, user data is transmitted through a wireless link composed of a receiving end and a sending end. Since the wireless channel is greatly affected by the environment, the link quality cannot be absolutely guaranteed, and a data transmission may not be completely correct. For this reason, represented by ARQ and HARQ, a retransmission mechanism that sends data multiple times and feeds back an acknowledgment is used to solve the above problems. [0003] In the ARQ or HARQ retransmission mechanism, each piece of user data that has been sent by the sending end must be notified by the receiving end that it has been successfully received, or the number of transmissions has exceeded the limit before it can be removed; For each piece of data, it is necessary ...

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Problems solved by technology

For example, in the LTE system, the number of retransmission time intervals for cells with a radius of less than 15km is set to 7, and the number of retransmission time intervals for cells with a radius of 15km-100km is set to 8. In this way, only theoretical calculations and simulations are used to set the number of retransmission intervals in the implementation process. Important parameters are not guaranteed to be optimal, and may artificially increase the transmission delay

In addition, there are few patents related to the realization of low-latency wireless communication. Patent No. 200710038627.6 proposes a method, but it only addresses the high retransmission delay of the upper layer when the RLC and MAC double-layer retransmission mechanisms are used in HSUPA. question

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