Wideband time division duplexing system up-link signal transmitting method

Abstract

A method for sending up-link signal of wideband time division duplex system includes confirming up-link time slot and partial integer sample point length of each symbol data as well as symbol sum as per standard requirement and sampling rate, confirming partial integer sample point length of selectable circulation prefix and its corresponding parameter set of up-link time slot interval integer sample point length based on certain condition, sending a numbers of symbol and one up-link time slot interval on up-link time slot in sequence and setting said sample point length to be the same under different system bandwidth.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for transmitting an uplink signal of a broadband time division duplex system. Background technique [0002] In a TDD communication system, the shortest duration of uplink or downlink is called a time slot. A time slot usually consists of two parts: several symbols for sending data and a time slot interval for not sending data. The symbol includes the information that the system needs to send, but no data is sent in the time slot interval. Its main function is to protect the uplink and downlink conversion. The downlink time slot interval of the downlink will also affect the coverage of the cell. Generally, the larger the downlink time slot interval, the larger the coverage of the cell. [0003] However, in the broadband TDD communication system, the frequency selective fading of the channel is very significant. In order to reduce the influence of frequency selective ...

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Problems solved by technology

According to the current transmission method, the terminal needs to support four uplink time slot intervals, which will increase the implementation complexity of the terminal without bringing any gain

[0008] 2. As mentioned earlier, the main function of the uplink slot interval of the uplink time slot is the protection of the up-downlink conversion, while the main function of the downlink time slot interval of the downlink time slot is in addition to the protection of the down-uplink conversion , will also affect the coverage of the cell. Therefore, the uplink time slot interval of the uplink time slot should not be greater than the downlink time slot interval of the downlink time slot. According to 3GPP TS 36.211 V0.4.2, the downlink time slot interval of the downlink time slot is equivalent to 288 Sample points, therefore, the uplink slot interval of the uplink slot should not be greater than 288 samples, but, as mentioned above, in the case of Extend cyclic prefix, when the number of available subcarriers of the system bandwidth is less than or equal to 300 , the duration of the uplink time slot interval is equivalent to 408 samples, which is obviously a waste of resources

Moreover, according to the current transmission method, when two adjacent cells are configured with different system bandwidths, the data between different terminals will cause serious interference due to the inconsistency of the cyclic prefix lengths of the time slot symbols, which seriously affects the transmission of data by terminals. s efficiency

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