Data transmitting method, data receiving method, data transmitting end, data receiving end and transmission system

Abstract

The embodiment of the invention discloses a data transmitting method, a data receiving method, a data transmitting end, a data receiving end and a transmission system, relating to the field of communication and aiming to solve the technical problem of transmission performance of ACK communication channels. The data receiving method comprises the following steps: receiving current data packets from a data transmission unit; selecting an ACK channel group corresponding to the current data transmission unit according to a mapping relationship of a data transmission unit serial number and an ACK channel group serial number; and transmitting an orthogonal code corresponding to the current data transmission unit in the ACK channel group according to the correctness of the received data packets of the current data transmission unit. The embodiment of the invention can be used for DL or UL ACK channel mapping and design.

Description

technical field [0001] The invention relates to the communication field, in particular to a data sending and receiving method, a data sending end, a data receiving end and a transmission system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiple) technology is adopted in S3G (including LTE (Long Term Evolution, long-term evolution), UMB (Ultra-Wideband, ultra-wideband wireless communication), etc.) and 4G (16m) A physical layer technology. OFDM technology divides the physical layer resources in the wireless communication system into several orthogonal narrowband sub-carriers in the frequency domain, and high-speed data streams are transmitted in parallel on each sub-carrier through serial-to-parallel conversion. Due to the narrowband characteristics of the sub-carriers, it can overcome the influence of multipath and greatly eliminate the interference between symbols; due to the orthogonal characteristics of the sub-carriers, that is, the spectrums be...

AI Technical Summary

Problems solved by technology

As the number of mobile terminals increases, code division multiplexing will increase interference, resulting in a decrease in transmission performance

For example, if a BS assigns data transmission units (1, 2) (3, 4, 5) (6) (7, 8) to 4 mobile terminals, then according to UMB rules, these 4 mobile terminals must be in The UL ACK channel is sent in the first t, while the other three tiles are empty, so the load in the first tile is very high, and the transmission performance of the ACK channel decreases

At the same time, for each mobile terminal, as long as the data transmission unit assigned by the DL remains unchanged (for example, when resources are continuously assigned), the position of the UL ACK is also unchanged, which will cause some two mobile terminals to send UL ACK channels Always send in the same tile, then they always interfere with each other, thus affecting their ACK transmission, when one user has a strong transmit power and another user has a low transmit power, the strong transmit power user will always interfere with the weak transmit power user, Seriously affect the ACK transmission performance of weak power users

Similarly, in LTE there is also the problem of two mobile terminals interfering with a fixed

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