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Scheduling requests for grant-free configurations

A scheduling request and associated technology, applied in wireless communication, electrical components, etc., can solve problems such as communication errors and excessive communication

Pending Publication Date: 2020-12-15
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Communication systems that support license-free transmission schemes and scheduling requests may cause communication errors, excessive communication, or other problems

Method used

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  • Scheduling requests for grant-free configurations
  • Scheduling requests for grant-free configurations
  • Scheduling requests for grant-free configurations

Examples

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Embodiment Construction

[0037] Some wireless communication systems may utilize a grant-based transmission scheme to indicate time-frequency resources on which user equipment (UE) or base stations may transmit data. In grant-based uplink operation, a user equipment with data to send can send a scheduling request (SR) to the base station, and the base station can reply to the user equipment with an uplink grant indicating that the data resource. The user equipment can then use the allocated resources to transmit data. However, such a grant-based uplink operation incurs a delay from the time data becomes available for transmission at the user equipment to the time the user equipment transmits the data on the allocated resources.

[0038] To help reduce the latency and signaling overhead associated with exchanging scheduling requests and grants, a grant-free mode of uplink operation may be used. In the grant-exempt mode of uplink operation, the user equipment may be configured with one or more resource...

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Abstract

The described techniques provide for a user equipment (UE) generating a scheduling request (SR) for a set of data for an uplink transmission from the UE to a base station. The UE may determine whetherthe SR for the set of data is associated with a grant-free configuration. The grant-free configuration may indicate a set of time-frequency resources that the UE may use to transmit the set of data.The UE may transmit to the base station an indication of whether the SR is associated with the grant-free configuration. If the SR is associated with a grant-free configuration, the UE may use the corresponding resources to transmit the set of data to the base station, and the base station may then decode the data based on having received the indication of the resources by way of the grant-free configuration.

Description

[0001] Cross References to Related Applications [0002] This patent application claims U.S. Patent Application No. 16 / 408,421, filed May 9, 2019 by SUNDARRAJAN et al., entitled "Scheduling Requests for Grant-Free Configurations," and SUNDARRAJAN et al., 2018 Priority to U.S. Provisional Patent Application No. 62 / 670,654, entitled "Scheduling Requests for Grant-Free Configurations," filed May 11, each of which is assigned to the present application the assignee. technical field [0003] The following relates generally to wireless communications, and more specifically to scheduling requests (SRs) for license-exempt configurations. Background technique [0004] 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 are capable of supporting communication with multiple users by sharing available system resources (eg, time, frequency, and power). Exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12
CPCH04W72/21H04W72/23H04W72/115H04W88/06H04W72/1268
Inventor J.K.桑达拉拉詹J.蒋L.何
Owner QUALCOMM INC