SP-SRS Spatial Relation Signaling Across Carriers and BWPs
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Solution Overview
Problem
Existing wireless communication technologies lack the ability to efficiently configure cross-carrier and cross-bandwidth part spatial relations for reference signal resources, leading to increased overhead and energy consumption due to the need for repeated beam management on multiple component carriers and bandwidth parts.
Innovation Solution
Implementing a flexible approach to indicate spatial relations using MAC-CE messages by extending existing formats to include cross-carrier and cross-bandwidth part identifiers, allowing shared spatial relations across multiple resources, thereby reducing the need for repeated beam management and overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate beam management is performed on each component carrier and bandwidth part, then beam management accuracy is maintained, but reference signal overhead and energy consumption increase
Solution Approach 1:
The patent merges beam management across multiple component carriers and bandwidth parts by indicating spatial relations that apply to multiple resources simultaneously. A single spatial relation indication can cover SRS resources on different carriers and BWPs, reducing the number of separate beam management operations needed while maintaining accuracy through unified spatial relationship management.
Solution Approach 2:
The spatial relation indication mechanism is designed to be universal across multiple component carriers and bandwidth parts. The same indication structure can reference resources on different carriers and BWPs, making the beam management system multi-functional and applicable to diverse resource configurations without requiring separate management procedures for each carrier or BWP.
2Measurement precision
If separate beam management is performed on each component carrier and bandwidth part, then beam management accuracy is maintained, but energy consumption increases
Solution Approach 1:
The patent combines beam management operations across multiple component carriers and bandwidth parts into unified spatial relation indications. By managing spatial relationships at a higher level that spans multiple resources, the system reduces the frequency and number of separate beam management operations, thereby lowering energy consumption while preserving beam management accuracy through comprehensive spatial relationship coverage.
3Quantity of substance
If cross-carrier spatial relation indication is implemented, then reference signal overhead is reduced, but system complexity increases
Solution Approach 1:
The patent introduces an intermediary spatial relation indication mechanism that bridges multiple component carriers and bandwidth parts. This intermediary structure allows the system to manage spatial relationships across carriers without requiring direct, separate management of each resource, thereby reducing overhead while containing complexity through a standardized indication interface that abstracts the underlying resource diversity.
Data Source
AI summary
Embodiments include methods for a network node to activate semi-persistent sounding reference signal (SP-SRS) resources for transmission by a user equipment (UE). Such methods include sending, to the UE, a control message comprising configuration of a set of SP-SRS resources associated with a particular serving cell of the wireless communication network. Such methods include sending to the UE a further control message for activating the configured set of SP-SRS resources. The further control message includes information identifying an SP-SRS resource of the set of SP-SRS resources to be activated, and an indication of the identified SP-SRS resource's spatial relation with a further resource that is not associated with the particular serving cell. The indication comprising an identity of a further serving cell that is different from the particular serving cell and that is associated with the further resource. Other embodiments include complementary methods for a UE.