发明名称 |
Methods and arrangements for estimating timing offset differences in a cellular network |
摘要 |
A method in a first network node (105) for estimating a first timing offset difference between a first timing offset of a first base station and a second timing offset of a second base station, is provided. The first network node (105) receives Uplink Time Difference Of Arrival, UTDOA, measurements. The UTDOA measurements relate to a first UTDOA time difference. The first network node (105) further receives Observed Time Difference Of Arrival, OTDOA, measurements. The OTDOA measurements relate to a first measured OTDOA time difference. The first network node estimates a first timing offset difference between a first timing offset of the first base station and a second timing offset of the second base station based on the first UTDOA time difference and the first measured OTDOA time difference. |
申请公布号 |
US9237541(B2) |
申请公布日期 |
2016.01.12 |
申请号 |
US201114007539 |
申请日期 |
2011.03.31 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) |
发明人 |
Zhang Yang;Siomina Iana;Su Youping;Zhang Chunhui |
分类号 |
H04W4/00;H04W56/00;H04W64/00 |
主分类号 |
H04W4/00 |
代理机构 |
Murphy, Bilak & Homiller, PLLC |
代理人 |
Murphy, Bilak & Homiller, PLLC |
主权项 |
1. A method in a first network node for estimating a first timing offset difference between a first timing offset of a first base station and a second timing offset of a second base station, wherein the first network node, first base station, and second base station are comprised in a cellular network, and wherein the method comprises:
receiving Uplink Time Difference Of Arrival, UTDOA, measurements from a second network node, which UTDOA measurements relate to a first UTDOA time difference between a first measured receiving time when an uplink signal from a user equipment is received at the first base station, and a second measured receiving time when the uplink signal from the user equipment is received at the second base station; receiving Observed Time Difference Of Arrival, OTDOA measurements from a third network node, which OTDOA measurements relate to a first measured OTDOA time difference between a third receiving time when a downlink signal from the first base station is received at the user equipment and a fourth receiving time when a downlink signal from the second base station is received at the user equipment; and estimating a first timing offset difference between a first timing offset of the first base station and a second timing offset of the second base station, based on the first UTDOA time difference and the first measured OTDOA time difference. |
地址 |
Stockholm SE |