Communication method of BBU (Building Base band Unit) and RRU (Radio Remote Unit) and base station

Abstract

The invention provides a communication method of a BBU (Building Base band Unit) and an RRU (Radio Remote Unit) and a base station. The communication method comprises the following steps of upgrading an old protocol installed on multiple RRUs, which are connected in series step by step and are connected with an auxiliary BBU based on the old protocol by the auxiliary BBU which is provided with the old protocol; disconnecting a first state RRU and the auxiliary BBU after the old protocol of the first state RRU is upgraded into a new protocol, and connecting the first state RRU to a main BBU which is provided with the new protocol; carrying out communication between the first stage RRU and the main BBU basing on the new protocol; and carrying out the communication between the main BBU and RRUs at different stages through the first RRU. According to the communication method and the base station, provided by the invention, through the upgrade, the interface compatibility problem between the main BBU and the RRUs is effectively solved, and the selectable range of the RRU is enlarged.

Description

technical field [0001] The present invention relates to a communication method between an indoor baseband unit (Building Base band Unit, BBU for short) and a radio remote unit (RRU for short), and a base station, belonging to the technical field of base stations in wireless communication systems. Background technique [0002] In an existing wireless communication system, a base station adopting a distributed architecture usually includes a BBU and at least one RRU, the BBU and the RRU are connected by optical fibers, and multiple RRUs are first connected in series step by step before being connected to the BBU. [0003] However, there are many existing baseband protocols, such as the IR interface protocol in the Division-Synchronous Code Division Multiple Access (TD-SCDMA) technology and the Long Term Evolution (Long Term Evolution, TD-SCDMA: Common Public Radio Interface (CPRI for short) protocol in LTE) technology, etc., and in existing base stations, the baseband interfac...

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Problems solved by technology

[0003] However, there are many existing baseband protocols, such as the IR interface protocol in the Division-Synchronous Code Division Multiple Access (TD-SCDMA) technology and the Long Term Evolution (Long Term Evolution, TD-SCDMA: Common Public Radio Interface (CPRI for short) protocol in LTE) technology, etc., and in existing base stations, the baseband interfaces of BBUs produced by different manufacturers may use different baseband protocols, so RRU and Compatibility of the baseband interface of the BBU

[0004] In order to solve the above-mentioned compatibility problems, in the prior art, RRUs compatible with different baseband protocols are usually selected, but this means that the optional range of RRUs is limited, and, with the continuous expansion of the network scale, the compatibility problem becomes Due to the high maintenance cost and complicated operation, it is difficult to effectively solve the compatibility problem only by replacing the RRU.

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