Group PDCCH Signaling for Wireless Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing group physical downlink control channel communications, particularly in reducing signaling overhead and meeting stringent latency and reliability specifications, especially in environments like industrial IoT, where frequent updates due to changing channel conditions are necessary.
Innovation Solution
The technique involves configuring user equipment (UE) into groups based on shared channel conditions and modulation and coding schemes, allowing for the transmission of group downlink control information messages that allocate resources to multiple UEs, thereby reducing signaling overhead and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual downlink control channel messages are transmitted to each UE, then resource allocation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple individual downlink control channel messages into a single group downlink control channel message that serves multiple UEs simultaneously. This merging approach reduces the total number of control messages transmitted while maintaining accurate resource allocation for each UE through individual resource indication fields within the group message.
Solution Approach 2:
The group downlink control channel message is designed to serve multiple functions: it provides resource allocation information to multiple UEs simultaneously, includes both group-level and UE-specific resource indications, and maintains compatibility with existing individual message structures through standardized field formats.
2Reliability
If frequent updates are transmitted to meet changing channel conditions, then reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent merges update information for multiple UEs into a single group control message, allowing frequent updates to be transmitted efficiently. This approach maintains high reliability by providing timely channel condition adaptations while reducing the signaling overhead burden that would result from sending individual update messages to each UE.
3Quantity of substance
If group PDCCH messages are used to reduce overhead, then signaling overhead is reduced, but resource allocation precision may deteriorate
Solution Approach 1:
The group downlink control channel message incorporates both group-level common information and UE-specific local information. Each UE receives tailored resource allocation details appropriate to its specific requirements while benefiting from the efficiency of group-based transmission, thus maintaining precision without sacrificing overhead reduction.
4Measurement precision
If individual control messages are sent to each UE, then resource allocation accuracy is maintained, but processing time increases
Solution Approach 1:
The patent merges resource allocation information for multiple UEs into a single group control message, which reduces the total processing time required for both transmission and reception. UEs can efficiently extract their specific allocations from the group message without waiting for individual messages, thus maintaining accuracy while reducing overall processing time.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A base station may transmit, and a UE may receive, via a configuration message, a group identifier indicating a group of UEs with which the UE is associated, the group of UEs being one of multiple groups of UEs which are each allocated resources. The base station may transmit the group downlink control information message to the group of UEs, and the UE may receive the group downlink control information message. The UE may determine that the group downlink control information message pertains to the UE by associating the group identifier with the group downlink control information message. The base station and the UE may communicate in accordance with the group downlink control information message based at least in part on the UE being associated with the group to which the group downlink control information message pertains.