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Handling of radio frequency front-end group delays for round trip time estimation

專利號(hào)
US11159972B2
公開日期
2021-10-26
申請(qǐng)人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Sony Akkarakaran; Tao Luo; Joseph Binamira Soriaga; Alexandras Manolakos; Naga Bhushan; Guttorm Ringstad Opshaug; Sven Fischer
IPC分類
H04W24/10; H04W64/00; H04W72/04
技術(shù)領(lǐng)域
rttr,ue,rttm,gd,rtt,network,may,gnodebs,signal,gnodeb
地域: CA CA San Diego

摘要

Disclosed are techniques for handling of radio frequency (RF) front-end group delays for round trip time (RTT) estimation. In an aspect, a network entity determines a network total group delay (GD) and a user equipment (UE) determines a UE total GD. The network entity transmits one or more RTT measurement (RTTM) signals to the UE. Each RTTM signal includes a RTTM waveform. The UE determines one or more one or more RTT response (RTTR) payloads for one or more RTTR signals. Each RTTR signal also includes a RTTR waveform. The UE transmits the RTTR signal(s) to the network entity. For each RTTR signal, a transmission time of the RTTR waveform and/or the RTTR payload is/are determined based on the UE total GD. The network entity determines a RTT between the UE and the network entity based on the RTTM signal(s), the RTTR signal(s), and the network total GD.

說明書

Also shown in FIG. 1A is the access point 125 that is separate from the RANs 120A and 120B. The access point 125 may be connected to the Internet 175 independently of the core network 140 (e.g., via an optical communication system such as FiOS, a cable modem, etc.). The air interface 108 may serve UE 102-4 or UE 102-5 over a local wireless connection, such as IEEE 802.11 in an example. UE 102-N is shown as a desktop computer with a wired connection to the Internet 175, such as a direct connection to a modem or router, which can correspond to the access point 125 itself in an example (e.g., for a WiFi router with both wired and wireless connectivity).

In FIG. 1A, a location server 170 is shown as connected to the Internet 175 and the core network 140. The location server 170 can be implemented as a plurality of structurally separate servers, or alternately may each correspond to a single server. As will be described below in more detail, the location server 170 is configured to support one or more location services for UEs 102 that can connect to the location server 170 via the core network 140 and/or via the Internet 175.

權(quán)利要求

1
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