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Srs transmission management in carrier aggregation

A carrier aggregation and component carrier technology, applied in the field of SRS transmission management, can solve the problems of inconsistent SRS transmission and system performance degradation

Active Publication Date: 2018-09-04
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The decision on whether to drop the SRS can be made without regard to the UE's capabilities or resource availability, which can lead to inconsistent transmission of SRS and lead to reduced system performance

Method used

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  • Srs transmission management in carrier aggregation
  • Srs transmission management in carrier aggregation
  • Srs transmission management in carrier aggregation

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Embodiment Construction

[0033] Sounding Reference Signals (SRS) can be used to improve channel estimation for uplink transmissions. In some wireless communication systems, SRS transmissions may be dropped when they collide with other uplink transmissions. That is, in some cases when SRS is scheduled to be transmitted on one cell with carrier aggregation (CA) configuration and uplink messages (e.g. control or data channels) are scheduled to be transmitted on another cell with CA configuration When transmitting on a cell, and the corresponding transmissions are scheduled to overlap in time (eg, they are scheduled for concurrent transmissions), then the UE may determine whether it will send both the SRS and another message. The UE may make this determination based on a number of factors including user equipment (UE) capabilities and communication system configuration.

[0034] The determination to prohibit the transmission of the SRS may be referred to as "SRS discard". For example, the decision on SR...

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Abstract

Systems, methods, and apparatuses for sounding reference signal (SRS) management in carrier aggregation (CA) are described. A user equipment (UE) may be scheduled for overlapping (e.g., concurrent) transmissions of SRS and uplink control or data on different cells of a CA configuration. In some cases, the SRS transmission may be dropped (e.g., the UE may refrain from transmitting a scheduled SRS).While in some cases, the UE may transmit both SRS and another uplink message in overlapping time intervals on different cells (e.g., SRS may be transmitted concurrently with another uplink message).A determination of whether to transmit or drop SRS may be based on whether the different cells have different cyclic prefix (CP) lengths or on whether the SRS is scheduled to be transmitted in a special subframe of a time division duplexing (TDD) configuration, for example.

Description

[0001] cross reference [0002] This patent application claims the benefit of U.S. Patent Application No. 15 / 414,250, filed January 24, 2017, entitled "SRSTransmission Management In Carrier Aggregation" by Chen et al., and filed January 27, 2016 by Chen et al. Priority to U.S. Provisional Patent Application No. 62 / 287,870 filed, entitled "SRS Transmission Management InCarrier Aggregation," each of which is assigned to the assignee of the present application. technical field [0003] The following content generally relates to wireless communication, and specifically relates to SRS transmission management in carrier aggregation. 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 can support communication with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such mult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W56/00H04L5/14H04L27/26H04W52/02
CPCH04L5/001H04L5/0051H04L5/0098H04L5/1469H04L27/2607H04W52/0219H04W52/0209H04W56/0055H04L5/0073Y02D30/70H04L5/005H04L5/0055H04W72/12
Inventor 陈万士P·加尔T·C·陈R·W-L·袁H·闫J·H·朴
Owner QUALCOMM INC