CN-115189743-B - Method and apparatus for generalized mobility scheduling framework

Abstract

Methods, systems, and devices for wireless communications are described. A wireless device, such as a User Equipment (UE), may determine a set of scheduled synchronization signal transmission times. A first subset of the set of scheduled synchronization signal transmission times may be allocated for dynamic measurements. The wireless device may select at least one candidate beam from the set of candidate beams for dynamic measurement during one of the transmission times in the first subset. The at least one candidate beam may be selected based at least in part on a fairness metric, a signal strength metric, a timing metric, or a combination thereof. The wireless device may perform a measurement procedure on the selected at least one candidate beam and may send a measurement report to another wireless device (e.g., a base station) based at least in part on the measurement procedure.

Inventors

• ZHU JUAN
• Y.LI
• R.He
• R.N. Salad

Assignees

• 高通股份有限公司
• 高通股份有限公司

Dates

Publication Date

20260421

Application Date

20190114

Priority Date

20190114

Claims (20)

1. 1. A method for wireless communication at a User Equipment (UE), comprising: receiving an indication of a set of scheduled synchronization signal transmission times; Measuring, at the UE, a plurality of transmit beams using a plurality of receive beams during a first subset of the set of scheduled synchronization signal transmission times, the first subset of the set of scheduled synchronization signal transmission times associated with a first number of synchronization signal transmission times during a periodic search and measurement period; Measuring, at the UE, the plurality of transmit beams using the subset of the plurality of receive beams during a second subset of the set of scheduled synchronization signal transmission times associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number, based at least in part on measured signal strength measurements at the UE for the plurality of transmit beams using the plurality of receive beams during the first subset of the set of scheduled synchronization signal transmission times, and At least one measurement report is sent based at least in part on measuring the plurality of transmit beams using the subset of the plurality of receive beams at the UE during the second subset of the set of scheduled synchronization signal transmission times.
2. 2. The method of claim 1, wherein measuring the plurality of transmit beams during the first subset of the set of scheduled synchronization signal transmission times, during the second subset of the set of scheduled synchronization signal transmission times, or both, comprises: a plurality of base station beams are measured in a cyclic scan.
3. 3. The method of claim 1, further comprising: the subset of the plurality of receive beams is determined based at least in part on a signal strength metric.
4. 4. The method of claim 1, further comprising: The subset of the plurality of receive beams is determined based at least in part on current serving beam criteria.
5. 5. The method of claim 1, further comprising: the subset of the plurality of receive beams is determined based at least in part on a spatial metric.
6. 6. The method of claim 1, further comprising: The subset of the plurality of receive beams is determined based at least in part on a timing metric.
7. 7. The method of claim 1, further comprising: The subset of the plurality of receive beams is determined based at least in part on hardware capabilities of the UE.
8. 8. The method of claim 1, further comprising: The set of scheduled synchronization signal transmission times is determined based at least in part on the number of candidate beams.
9. 9. The method of claim 1, further comprising: the set of scheduled synchronization signal transmission times is determined based at least in part on hardware capabilities of the UE.
10. 10. The method of claim 1, further comprising: signaling is received from a base station, the signaling defining the first subset of the set of scheduled synchronization signal transmission times and the second subset of the set of scheduled synchronization signal transmission times.
11. 11. The method of claim 1, further comprising: the first subset of the set of scheduled synchronization signal transmission times and the second subset of the set of scheduled synchronization signal transmission times at the UE are determined.
12. 12. The method of claim 1, further comprising: measuring, at the UE, one or more second transmit beams using the plurality of receive beams during the first subset of the set of scheduled synchronization signal transmission times, and The plurality of transmit beams is selected based at least in part on measuring, at the UE, the plurality of transmit beams and the one or more second transmit beams using the plurality of receive beams during the first subset of the set of scheduled synchronization signal transmission times.
13. 13. The method of claim 1, wherein the periodic search and measurement period is associated with sixteen synchronization signal transmission times.
14. 14. The method of claim 1, wherein, during the periodic search and measurement period, a first scheduled synchronization signal transmission time of the first subset of the set of scheduled synchronization signal transmission times is separated from a second scheduled synchronization signal transmission time of the first subset of the set of scheduled synchronization signal transmission times by one or more scheduled synchronization signal transmission times of the second subset of the set of scheduled synchronization signal transmission times.
15. 15. The method of claim 1, wherein each scheduled synchronization signal transmission time of the set of scheduled synchronization signal transmission times is associated with a respective set of synchronization signal bursts comprising a plurality of synchronization signal blocks.
16. 16. The method of claim 15, wherein each of the plurality of synchronization signal blocks corresponds to a respective one of the plurality of transmit beams.
17. 17. An apparatus for wireless communication at a User Equipment (UE), comprising: One or more processors, and One or more memories coupled to the one or more processors, the one or more processors configured to cause the UE to: receiving an indication of a set of scheduled synchronization signal transmission times; Measuring, at the UE, a plurality of transmit beams using a plurality of receive beams during a first subset of the set of scheduled synchronization signal transmission times, the first subset of the set of scheduled synchronization signal transmission times associated with a first number of synchronization signal transmission times during a periodic search and measurement period; Measuring, at the UE, the plurality of transmit beams using the subset of the plurality of receive beams during a second subset of the set of scheduled synchronization signal transmission times associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number, based at least in part on measured signal strength measurements at the UE for the plurality of transmit beams using the plurality of receive beams during the first subset of the set of scheduled synchronization signal transmission times, and At least one measurement report is sent based at least in part on measurements of the plurality of transmit beams at the UE using the subset of the plurality of receive beams during the second subset of the set of scheduled synchronization signal transmission times.
18. 18. The apparatus of claim 17, wherein to measure the plurality of transmit beams during the first subset of the set of scheduled synchronization signal transmission times, during the second subset of the set of scheduled synchronization signal transmission times, or both, the one or more processors are configured to cause the UE to: a plurality of base station beams corresponding to the UE are measured in a cyclic scan.
19. 19. The apparatus of claim 17, wherein the one or more processors are configured to cause the UE to: the subset of the plurality of receive beams is determined based at least in part on a signal strength metric.
20. 20. The apparatus of claim 17, wherein the one or more processors are configured to cause the UE to: The subset of the plurality of receive beams is determined based at least in part on current serving beam criteria.

Description

Method and apparatus for generalized mobility scheduling framework The application relates to a method and a device for generalized mobility scheduling framework, which are applied for the application of the patent application with the number 201980009307.9, wherein the application date is 2019, 01 and 14. Cross reference This patent application claims the benefit of U.S. provisional patent application number 62/620,335 entitled "Generalized Mobility Scheduling Framework" filed 22 by Zhu et al at 1 month 2018 and U.S. patent application number 16/246,421 entitled "Generalized Mobility Scheduling Framework" filed 11 by Zhu et al at 1 month 2019, each of which is assigned to the assignee of the present application. Technical Field The following relates generally to wireless communications, and more particularly to a generalized mobility scheduling framework. Background Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems, such as Long Term Evolution (LTE) systems, LTE-advanced (LTE-a) systems, or LTE-a Pro systems, and fifth generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems may employ techniques such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), or discrete fourier transform spread-spectrum orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communication system may include multiple base stations or network access nodes, each of which simultaneously supports communication for multiple communication devices, which may be otherwise referred to as User Equipment (UE). In some wireless communication systems (e.g., millimeter wave (mmW) systems), a base station and a UE may communicate via one or more directional beams. A transmitter (e.g., a base station) may participate in a beam scanning process to establish an active beam pair with a receiver (e.g., a UE). The active beam pairs may include an active transmit beam of the transmitter and a corresponding active receive beam of the receiver. The transmit and receive beams in the active beam pair may be refined, for example, by a beam refinement process. The beam scanning and beam refinement process may involve transmitting multiple directional beams with different beam forming parameters. The receiver may receive some or all of the beams transmitted with different beamforming parameters and measure one or more characteristics (e.g., received power, gain, or Channel Quality Indication (CQI) metrics) of each beam. The receiver may then provide an indication to the transmitter indicating one or more of the measured characteristics, one or more beams preferably used to establish the active beam pair, or any combination thereof. However, in some cases, this process may be inefficient and result in significant delays in the beam selection process (e.g., when the receiver selects a beam, beam pair, or beam parameter from a plurality of different transmit beams, receive beams, cells, component carriers, etc.). Disclosure of Invention The described technology relates to improved methods, systems, devices or apparatus supporting a generalized mobility scheduling framework. In general, the described techniques provide a User Equipment (UE) that may dynamically select one or more candidate beams for measurement during a synchronization signal transmission time. The UE may determine a set of scheduled synchronization signal transmission times. The UE may select one or more candidate beams from the set of candidate beams for dynamic measurement during one of the first subset of scheduled synchronization signal transmission times. A first subset of the set of scheduled synchronization signal transmission times may be allocated for dynamic measurements. The UE may perform a measurement procedure on the selected candidate beam during one of the first subset of scheduled synchronization signal transmission times. The UE may then send a measurement report corresponding to the measurement procedure. A method for wireless communication at a UE is described. The method may include determining a set of scheduled synchronization signal transmission times, selecting at least one candidate beam from a set of candidate beams for dynamic measurement during one of a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurement, performing a measurement procedure on the at least one candidate beam during the one of