公开(公告)号：US20240219558A1

公开(公告)日：2024-07-04

申请号：US18091151

申请日：2022-12-29

Applicant: DISH WIRELESS L.L.C.

Inventor： Khalid W. Al-Mufti ,  Mehdi Alasti

IPC: G01S13/76

CPC classification number: G01S13/765 ,  H04W76/10

Abstract: An approach for estimating Round Trip Time (RTT) such as used for estimating a location of mobile User Equipment (UE) devices, particularly adapted for Open Radio Access Networks (O-RANs) that disaggregate basestation functions into a Radio Unit (RU) and a Distributed Unit (DU) or Central Unit (CU). A Positioning Reference Signal (PRS) is transmitted by the RU according to schedule determined by the DU or CU. A Sounding Reference Signal (SRS) is returned by the UE to the DU or CU, with an estimate by the UE of its internal delay. The RU reports an estimate of the difference seen between a time of transmission of the PRS and time of reception of the SRS. The RTT is then estimated by subtracting the UE's internal delay from this difference. RTTs taken between the UE and two or more RU's may further determine a location of the UE.

公开(公告)号：US20250133533A1

公开(公告)日：2025-04-24

申请号：US18493059

申请日：2023-10-24

Applicant: DISH Wireless L.L.C.

Inventor： Khalid W. Al-Mufti ,  Mehdi Alasti

IPC: H04W64/00 ,  H04W40/02 ,  H04W84/06

Abstract: An Inter-Satellite-Link (ISL) for an Open Radio Access Network (O-RAN) that is part of a Non-Terrestrial Network (NTN). The disclosed embodiment of an O-RAN system makes use of multiple satellite systems in combination with terrestrial based systems in various configurations to carry out the O-RAN system functions. An O-RAN system includes, among other structures and functions, a Radio Unit (RU), a Distributed Unit (DU), and a Central Unit (CU). This disclosure introduces various configuration/hierarchies of using satellites for the hardware and software to carry various portions of the RU, DU and CU in the O-RAN architecture. Various functions of the network can be implemented by satellite, with each satellite providing some level of RU and DU functionality. In one alternative, one satellite in a group of satellites acts as the DU in the form of a router, communicating with other satellites via the ISL, acting as a router.

公开(公告)号：US20240323785A1

公开(公告)日：2024-09-26

申请号：US18188342

申请日：2023-03-22

Applicant: DISH Wireless L.L.C.

Inventor： Mehdi Alasti ,  Khalid W. Al-Mufti ,  Siddhartha Chenumolu

IPC: H04W36/10 ,  H04W36/00

CPC classification number: H04W36/10 ,  H04W36/0033

Abstract: Technologies for efficient handover in 5G networks are disclosed. An example method includes responsive to detecting that a user device is located in a geographic area with overlapping 5G coverage from a first gNB and a second gNB and that the user device is moving away from the first gNB's coverage toward the second gNB's coverage, determining to perform a light inter-gNB handover of the user device, and causing execution of the light inter-gNB handover by at least causing a physical switch from a physical CU-CP of the first gNB to a physical CU-CP of the second gNB, a logical switch from a logical CU-UP of the first gNB to a logical CU-UP of the second gNB, a logical switch from a logical DU of the first gNB to a logical DU of the second gBN, and a logical switch from a logical RU of the first gNB to a logical RU of the second gBN, wherein the logical switches are performed without transfer of context data associated with the user device.