Hybrid multi-system radio remote unit (RRU) and method of transmitting time division (TD) signals thereof

Abstract

The invention discloses a radio remote unit (RRU) and a method of transmitting time division (TD) signals thereof. After a DAU in the RRU receives downlink signals of multiple communication systems, TD signals are converted into corresponding downlink base frames, and the downlink base frames carrying corresponding time delay parameters are forwarded to the DRU in the RRU connected with the downlink base frames; and after the DRU receives the downlink base frames with the time delay parameters, a downlink cache time delay value of the TD signals in the DRU is calculated, and radio transmission is carried out after air interfaces of the TD signals after frame decoding are aligned in the DRU. In the multi-system RRU, the DAU converts TD signals into corresponding downlink base frames after the downlink signals of multiple communication systems are received and time delay adjustment of the downlink TD signals is carried out by each DRU in the RRU according to the time delay parameters, alignment of air interfaces of TD signals and receiving and sending in the radio part can be ensured, and transmission of the TD signal and signals of other communication systems in the same RRU can be realized.

Description

Technical field [0001] The present invention relates to the field of wireless communication technology, in particular to a hybrid multi-standard radio frequency remote unit and a method for transmitting time division signals. Background technique [0002] At present, with the advent of the 3G era and the upgrading of communication technologies, there will be coexistence of 3G and 2G networks for a long period of time. If a complete set of equipment is deployed for each standard, it will cause cost problems. And engineering deployment issues, the multi-mode radio remote unit (RRU) system can meet the needs of operators to make full use of the existing 2G standard macro station resources, and can increase the development trend of 3G standard system capacity, solve network construction costs and engineering deployment, Site selection and other issues can also increase the coverage of WLAN, providing operators with multi-standard comprehensive coverage solutions. [0003] For a multi-...

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Problems solved by technology

As a result, the TD signal will make necessary adjustments as the state of the BBU of other standard signals or the state of the multi-mode RRU itself changes; since the TD BBU cannot directly manage the multi-mode RRU like a single-standard RRU, it used to be common The method of directly measuring and calculating by the BBU and setting the downlink signal buffer of each single-standard RRU is not applicable to the current multi-mode RRU system containing TD signals, because the downlink TD signals in the multi-mode RRU system will follow other standards. Adjust the state of the BBU or the state of the multi-mode RRU itself. If the adjustment range is too large, the downlink signal will be cut off by the switch, resulting in abnormal communication.

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