Dynamic Sidelink Frequency Allocation for PDCP Duplication
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Solution Overview
Problem
The existing LTE sidelink interface lacks dynamic configuration of frequency resources for PDCP duplication, leading to suboptimal performance in unicast transmission modes of New Radio (NR) sidelink communication.
Innovation Solution
A method for a terminal device to obtain sidelink frequency resources based on first information, such as layer 2 addresses or indication information, to dynamically configure frequency resources for each transmission path in PDCP duplication, either by direct determination or network-assisted methods, and assign Logical Channel Identities (LCIDs) to improve resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed carrier set is configured through SIB or pre-configured information for sidelink transmission paths, then the configuration is simple and easy to implement, but the frequency resource utilization is suboptimal and transmission efficiency is limited
Solution Approach 1:
The patent transforms the static, fixed carrier set configuration into a dynamic configuration mechanism. The network device determines frequency resources based on first information (layer 2 addresses, indication information) and provides feedback to terminal devices. This allows the frequency resource set for PDCP duplication to adapt dynamically to changing transmission conditions and channel states, thereby improving transmission efficiency while maintaining manageable configuration complexity through automated network control.
2Adaptability or versatility
If no assistance information is provided from receiving terminals in sidelink unicast mode, then the system operation is simple, but the frequency resource allocation cannot be optimized for specific transmission paths
Solution Approach 1:
The patent introduces the network device as an intermediary that collects first information from terminal devices and determines optimized frequency resources for PDCP duplication transmission paths. The network device acts as a mediator between transmitting and receiving terminals, using the collected address information and indication information to make intelligent frequency resource allocation decisions, thereby achieving adaptable resource allocation without requiring direct terminal-to-terminal negotiation.
3Reliability
If the same carrier set is used for all sidelink transmission paths, then the configuration is uniform and simple, but the performance gain from PDCP duplication is limited
Solution Approach 1:
The patent applies local quality by determining frequency resources specifically for each PDCP duplication transmission path based on unique first information characteristics. Instead of using a uniform carrier set for all paths, the network device tailors the frequency resource allocation to each specific transmission path's requirements, using layer 2 addresses and indication information to differentiate and optimize resources locally for each path, thereby enhancing PDCP duplication reliability.
Data Source
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AI summary
A frequency resource acquisition, determination method, apparatus, a terminal device and a network device are provided. The method is performed by a first terminal device and includes: obtaining, based on first information, a sidelink frequency resource set available for each transmission path in the case of the PDCP duplication; the first information includes at least one of the following: a combination of a layer 2 source address and a layer 2 destination address of a unicast connection between a first terminal device and a second terminal device; first indication information; or second indication information.