- 专利标题: Soft handoff for OFDM
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申请号: US10104399申请日: 2002-03-22
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公开(公告)号: US07042858B1公开(公告)日: 2006-05-09
- 发明人: Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong , Dong-Sheng Yu
- 申请人: Jianglei Ma , Ming Jia , Peiying Zhu , Wen Tong , Dong-Sheng Yu
- 代理机构: Withrow & Terranova, PLLC
- 主分类号: H04Q7/00
- IPC分类号: H04Q7/00
摘要:
The present invention relates to soft handoffs in an OFDM system. Each mobile terminal measures pilot signal strengths of transmissions from adjacent base stations. If the pilot signal strength for a base station exceeds the defined threshold, that base station is added to an active set list. Each mobile terminal notifies the base stations of their active set lists. By providing the set list to the base station controller and the servicing base station, the mobile terminal identifies the sole servicing base station or triggers a soft handoff mode when multiple base stations appear on the active set list. The soft handoff mode uses a combination of scheduling and space-time coding to affect efficient and reliable handoffs.
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