| 发明名称 | Method and arrangement in a communication system | ||
| 摘要 | The present invention relates to the area of communication, and especially to a method and an arrangement for antenna calibration in a communication system comprising a baseband unit (BBU) and distributed radio remote units (RRUs). The present invention aims to limit antenna calibration duration in the antenna calibration chain. A cable delay based on the length of the cable connecting the BBU and the RRU is obtained. A delay compensation is calculated based upon the cable delay. Thereupon the antenna calibration chain utilized by the BBU and the RRU is adapted based upon the delay compensation. | ||
| 申请公布号 | US8965433(B2) | 申请公布日期 | 2015.02.24 |
| 申请号 | US200913503934 | 申请日期 | 2009.10.29 |
| 申请人 | Telefonaktiebolaget L M Ericsson (publ) | 发明人 | Liao Jingyi |
| 分类号 | H04B7/00;H04B17/00 | 主分类号 | H04B7/00 |
| 代理机构 | Murphy Bilak & Homiller, PLLC | 代理人 | Murphy Bilak & Homiller, PLLC |
| 主权项 | 1. A method for antenna calibration in a radio base station comprising a base band unit (BBU) that is connected to a number of distributed radio remote unit (RRUs) by respective cables to thereby form a corresponding number of BBU and RRU pairs, said method comprising for each BBU and RRU pair: obtaining a cable delay based on a length of the cable connecting the BBU and RRU pair; calculating a delay compensation based on the obtained cable delay; and adapting an antenna calibration chain used by the BBU and RRU pair for antenna calibration, based on the calculated delay compensation. | ||
| 地址 | Stockholm SE | ||