US-12621733-B2 - Inter-rat measurement gap configuration

US12621733B2US 12621733 B2US12621733 B2US 12621733B2US-12621733-B2

Abstract

Enhanced inter-RAT and measurement gap operations are disclosed. In one aspect, a device may generate a customized measurement gap for monitoring control signals of another network for inter-RAT procedures. In another aspect, a device may modify, such as extend or shift, a network measurement gap to generate a modified measurement gap for monitoring control signals of another network for inter-RAT procedures. The device may modify the network measurement gap to align the network's measurement gap, such as LTE measurement gap, with a measurement window of another network, such as an SMTC window of a 5G network. Other aspects and features are also claimed and described.

Inventors

Ling Xie
Zhanyi Liu
Yongle WU
Yong Li
Arvind Vardarajan Santhanam
Jie Mao
Scott Hoover
Xuqiang ZHANG

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260505
Application Date: 20191108

Claims (20)

1 . A method of wireless communication comprising: determining, by a user equipment (UE), a customized measurement gap repetition period for at least one inter-radio access technology (inter-RAT) cell based on network measurement gap information, and; determining, by the UE, a customized measurement gap offset for the at least one inter-RAT cell based on the network measurement gap information; determining, by the UE, a customized measurement gap length for the at least one inter-RAT cell based on the network measurement gap information; and performing, by the UE, at least two inter-RAT cell measurements including a first inter-RAT cell measurement for a first serving cell and a second inter-RAT cell measurement for a second serving cell, wherein the first inter-RAT cell measurement and the second inter-RAT cell measurement are each performed based on the customized measurement gap repetition period, the customized measurement gap offset, and the customized measurement gap length, wherein the at least one inter-RAT cell includes the first serving cell and the second serving cell, and wherein first measurement windows of the first serving cell do not align in time with second measurement windows of the second serving cell during network indicated measurement gaps indicated by the network measurement gap information.
2 . The method of claim 1 , further comprising determining a customized measurement gap for the at least one inter-RAT cell based on the customized measurement gap repetition period, the customized measurement gap offset, and the customized measurement gap length, wherein the at least two inter-RAT cell measurements are performed based on the customized measurement gap.
3 . The method of claim 1 , wherein, prior to performing the at least two inter-RAT cell measurements, the UE is connected to the second serving cell, and wherein the second serving cell is a primary serving cell.
4 . The method of claim 3 , wherein the primary serving cell is an LTE serving cell, and wherein the first serving cell is an NR serving cell.
5 . The method of claim 3 , further comprising: determining whether to join the first serving cell based on performing the at least two inter-RAT cell measurements; responsive to determining to join the first serving cell, sending a measurement report indicating that the UE requests to join the first serving cell; receiving a radio resource control (RRC) message responsive to the measurement report; and joining the first serving cell based on the RRC message.
6 . The method of claim 1 , wherein the customized measurement gap repetition period is determined based on one or more UE parameters, one or more network parameters, one or more channel parameters, or a combination thereof.
7 . The method of claim 1 , wherein the customized measurement gap repetition period is determined based on a UE capability, an active traffic type, a scheduling rate, or a combination thereof.
8 . The method of claim 1 , wherein the customized measurement gap offset is determined based on a synchronization signal block (SSB) measurement timing configuration (SMTC) configuration.
9 . The method of claim 8 , wherein the customized measurement gap offset is determined further based on a measurement gap repetition period, overhead, or both, and wherein the SMTC configuration is SMTC offset, period, or both.
10 . The method of claim 1 , wherein the customized measurement gap length is determined based on a synchronization signal block (SSB) measurement timing configuration (SMTC) configuration.
11 . The method of claim 10 , wherein the SMTC configuration is an SMTC duration.
12 . The method of claim 10 , wherein the customized measurement gap length is determined based on a maximum SSB length.
13 . The method of claim 1 , further comprising: determining that there is no measurement gap configuration for at least one serving cell of the at least one inter-RAT cell.
14 . The method of claim 1 , further comprising, prior to determining the customized measurement gap repetition period, transmitting, by the UE, a capabilities message indicating that the UE requests measurement gaps to identify or measure inter-RAT cells.
15 . The method of claim 1 , further comprising, prior to determining the customized measurement gap repetition period, receiving, by the UE, a configuration message from a networking entity indicating a gapless measurement mode.
16 . The method of claim 1 , further comprising, prior to determining the customized measurement gap repetition period, receiving, by the UE, a second configuration message from a networking entity indicating a particular gap modification mode.
17 . The method of claim 1 , further comprising: determining, by the UE, a measurement configuration for the least one inter-RAT cell; determining, by the UE, whether a condition for a synchronization signal block (SSB) detection is satisfied based on the measurement configuration; adjusting, by the UE, a SSB measurement gap parameter based on determining that the condition for SSB detection has been satisfied; and monitoring, by the UE, for SSB signals based on the adjusted SSB measurement gap parameter.
18 . The method of claim 17 , wherein adjusting, by the UE, the SSB measurement gap parameter includes extending the SSB measurement gap parameter, wherein the SSB measurement gap parameter includes a measurement gap length.
19 . The method of claim 17 , wherein adjusting, by the UE, the SSB measurement gap parameter includes increasing the SSB measurement gap parameter, and wherein the SSB measurement gap parameter includes a measurement gap offset.
20 . The method of claim 1 , further comprising: receiving, by the UE from a network entity, a capabilities message indicating that the UE is to operate in a sequential measurement mode for inter-RAT operations.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of International Patent Application No. PCT/CN2019/116832, entitled, “INTER-RAT MEASUREMENT GAP CONFIGURATION,” filed on Nov. 8, 2019, which is expressly incorporated by reference herein in its entirety. TECHNICAL FIELD Aspects of the technology discussed below relate generally to wireless communication systems, and more particularly, to inter-radio access technologies and measurement gap configuration. The discussed techniques can enable and provide increased reliability in cell addition for different wireless technologies and synchronization of different wireless technologies. INTRODUCTION Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources. A wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs). A UE may communicate with a base station via downlink and uplink. The downlink (or forward link) refers to the communication link from the base station to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the base station. A base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE. On the downlink, a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters. On the uplink, a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink. As the demand for mobile broadband access continues to increase, the possibilities of interference and congested networks grows with more UEs accessing the long-range wireless communication networks and more short-range wireless systems being deployed in communities. Research and development continue to advance wireless technologies not only to meet the growing demand for mobile broadband access, but to advance and enhance the user experience with mobile communications. BRIEF SUMMARY OF SOME EMBODIMENTS The following summarizes some aspects of the present disclosure to provide a basic understanding of the discussed technology. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in summary form as a prelude to the more detailed description that is presented later. The described techniques relate to improved methods, systems, devices, and apparatuses that support enhanced inter-radio access technology (inter-RAT) management procedures, including device based measurement gap configuration operations. For example, a user equipment (UE), may generate customized (e.g., local or device specific) measurement gap parameters and a customized measurement gap, extend measurement gap windows, or shift measurement gap windows to align particular control messages or windows of different radio technologies. To illustrate, a UE may “fake” a control window for a network or network device that does not support control windows or may be operating in a windowless mode by creating a local window to align control windows of different networks. For example, a UE may generate a customized or local LTE measurement gap to align a synchronization signal block (SSB) based measurement timing configuration (SMTC) window of a 5G cell and a measurement gap of an LTE cell. As another illustration, a UE may extend or shift a network control window. For example, a UE may extend or shift a network measurement gap to align an SMTC window of a 5G cell and the measurement gap of an LTE cell. Such enhanced inter-RAT and measurement gap operations may enable enhanced operation in dual wireless modes, such as improved reliability in cell addition. For example, a device may more quickly and more successfully join a secondary cell group or account for timing drift or time shifting while connected. Accordingly, such techniques may increase reliability and throughput. In one aspect of the disclosure, a method of wireless communication includes determining, by a user equipment (UE), a customized measurement gap repetition period for at least one inter-radio access te