Patent ID: 7937110
Filing Date: 2011-05-03
Classification: H04W

Abstract:
1. A distributed base station system, comprising: a first base band unit (BBU) in communication with a Radio Frequency unit (RFU); wherein the first BBU comprises: a main processing unit; a clock unit; a base band signal processing unit; a transmission unit; and an interface unit; wherein the interface unit is configured to intercommunicate digital base band signals with the base band signal processing unit; and intercommunicate master control information with the main processing unit; wherein the interface unit comprises a primary base band Radio Frequency (RF) interface; wherein the RFU comprises a secondary base band RF interface and the RFU is connected to the primary base band RF interface of the BBU; wherein the distributed base station system further comprises at least a second BBU; and wherein the interface unit of the first BBU further comprises a capacity expansion interface, configured to communicate with the second BBU; wherein the system further comprises an exchange base band (BB) cassette with a plurality of capacity expansion interfaces; the first BBU is connected with a capacity expansion interface of the exchange BB cassette via the capacity expansion interface of the first BBU; and the second BBU is connected with another capacity expansion interface of the exchange BB cassette.