# US 2014/0155066 A1 · Networking Method for Multi-Site Cell, Base Band Unit, Remote RF Unit and System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155066 A1 - Document ID: US20140155066A1 - Status: Published application - Kind: A1 - Application number: 14/175,804 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2011-08-10 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jiang Guo; Yong He; Yingjiu Xia; Baomin Li; Di Zhu - Web page: https://patentgrep.com/patent/US20140155066A1 ## CPC - H04W 36/08: Reselecting an access point - H04B 1/74: for increasing reliability, e.g. using redundant or spare channels or apparatus {(replacing by standby devices for amplifiers H03F1/52, H03F1/542)} - H04W 36/16: Performing reselection for specific purposes - H04W 88/085: {Access point devices with remote components} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Embodiments of the present invention provide a networking method applied to a multi-site cell, a base band unit, a remote RF unit and a system. The method includes: connecting at least one RRU of one or more remote end remote units RRUs under a base station of a local cell to at least two base stations. The at least two base stations include the base station of the local cell and at least one other base station. Communication, is continued by using the at least one other base station when the communication between the one RRU of the one or more RRUs and the base station of the local cell fails. ## Claims ### Claim 1 A networking method applied to a multi-site cell, the method comprising: connecting one remote radio frequency unit (RRU) of one or more RRUs under a base station of a local cell to at least two base stations, wherein the at least two base stations comprise a base station of the local cell and at least one other base station; communicating between the one RRU of the one or more RRUs and the base station of the local cell; and continuing communication by using the at least one other base station when a communication failure occurs between the one RRU of the one or more RRUs and the base station of the local cell. ### Claim 2 (depends on 1) The method according to claim 1, wherein continuing the communication by using the at least one other base station comprises: in a case of chain networking, when the communication failure is caused by a fault of an optical fiber, switching the RRU at a fault point and a residual RRU that is after the RRU at the fault point according to a chain sequence to one of the at least one other base station; and when the communication failure is caused by a fault of a base band unit (BBU) in the base station of the local cell, switching the RRU under the base station of the local cell to the at least one other base station. ### Claim 3 (depends on 2) The method according to claim 2, wherein, when the communication failure is caused by the fault of the BBU in the base station of the local cell, switching the RRU under the base station of the local cell to the at least one other base station comprises: switching an RRU that is before the BBU according to the chain sequence and an RRU that is after the BBU according to the chain sequence to two different base stations. ### Claim 4 (depends on 1) The method according to claim 1, wherein connecting the one RRU of the one or more RRUs under the base station of the local cell to the at least two base stations comprises: connecting a last RRU under the base station of the local cell to a first RRU in a next cell. ### Claim 5 (depends on 1) The method according to claim 1, wherein connecting the at least one RRU of the one or more RRUs under the base station of the local cell to the at least two base stations comprises: connecting a last RRU under the base station of the local cell to a base band unit (BBU) in a next cell, and connecting a first RRU in the next cell to the BBU of the local cell. ### Claim 6 (depends on 1) The method according to claim 1, wherein continuing the communication by using the at least one other base station comprises: in a case of star networking and that the RRU whose communication fails is connected to the at least one other base station, when the communication failure is caused by a fault of an optical fiber, switching the RRU whose communication fails to one of the at least one other base station; and when the communication failure is caused by a fault of a base band unit (BBU) in the base station of the local cell, switching the RRU whose communication fails to one of the at least one other base station. ### Claim 7 (depends on 1) The method according to claim 1, wherein base band units BBUs of the at least two base stations are connected to each other. ### Claim 8 A base band unit (BBU), comprising: a detector, configured to detect whether communication with one or more remote radio frequency units (RRUs) under a local base station fails; and a controller, configured to perform control to continue the communication by using another base station when the detector detects a communication failure between the BBU and one RRU of the one or more RRUs under the local base station fails. ### Claim 9 (depends on 8) The BBU according to claim 8, wherein the controller comprises: a switching unit, configured to switch the RRU under the local base station to the another base station when the communication fails. ### Claim 10 (depends on 9) The BBU according to claim 9, wherein: in a case of chain networking, when the communication failure is caused by a fault of an optical fiber, the switching unit switches the RRU at a fault point and a residual RRU that is after the RRU at the fault point according to a chain sequence to one of the another base station; and when the communication failure is caused by a fault of the BBU in the local base station, the switching unit switches the RRU under the local base station to the at least one other base station. ### Claim 11 (depends on 10) The BBU according to claim 10, wherein, when the communication failure is caused by the fault of the BBU in the local base station, the controller is configured to switch the RRU under the local base station to the at least one other base station by switching an RRU that is before the BBU according to the chain sequence and the RRU that is after the BBU according to the chain sequence to two different base stations. ### Claim 12 (depends on 9) The BBU according to claim 9, wherein: in a case of star networking, when the communication fails, the switching unit switches the RRU whose communication fails and which is connected to at least one other base station to the at least one other base station. ### Claim 13 (depends on 8) The BBU according to claim 8, further comprising: a first connector, configured to be connected to a first RRU of a next base station and a last RRU of a previous base station. ### Claim 14 (depends on 13) The BBU according to claim 13, further comprising: a BBU connector, configured to be connected to a BBU connector of the next base station, so that BBUs of the next base station and the local base station are connected to each other. ### Claim 15 A remote radio frequency unit (RRU), comprising: a second connector, connected to an RRU or a base band units BBUs under another base station.