D2D Discovery Resource Allocation in Wireless Systems
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Solution Overview
Problem
In wireless communication systems, Device-to-Device (D2D) discovery requires efficient resource allocation to minimize impact on legacy UE-BS communication, particularly in terms of time and frequency resources, while ensuring continuous operation regardless of UE states and coexistence with legacy communication.
Innovation Solution
A method and apparatus for configuring and signaling resources for D2D discovery, involving the generation and transmission of discovery resource configuration information, including discovery resource cycle, subframe bitmap, repetition information, and physical resource block details, to allocate dedicated resources for D2D communication without interfering with legacy UE-BS communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated resources are allocated for D2D discovery, then D2D discovery performance is improved, but resource availability for legacy UE-BS communication is reduced
Solution Approach 1:
The patent segments time-frequency resources into dedicated discovery resources and legacy communication resources. Discovery resources are allocated in specific subframes and resource blocks that are separate from those used for legacy UE-BS communication, allowing both functions to operate simultaneously without interference.
Solution Approach 2:
The patent introduces a new dimension for resource allocation by defining discovery resources in terms of discovery resource cycles, subframe bitmaps, and PRB offsets that are distinct from traditional legacy communication resource allocation, enabling independent control and optimization of discovery resources.
2Duration of action of stationary object
If discovery resources are allocated frequently, then D2D discovery continuity is improved, but impact on legacy UE communication increases
Solution Approach 1:
The patent implements periodic discovery resource allocation through the discovery resource cycle parameter, which defines the period between consecutive discovery resource allocations. This periodic structure ensures continuous discovery capability while controlling the frequency of resource allocation to minimize impact on legacy communications.
Solution Approach 2:
The patent enables dynamic adjustment of discovery resource allocation parameters including the discovery resource cycle length, subframe bitmap patterns, and PRB offset values. These parameters can be adapted based on network conditions, discovery traffic load, and legacy communication requirements to optimize the balance between discovery continuity and legacy communication performance.
Data Source
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AI summary
A method and apparatus for transmitting and receiving resource allocation information in a wireless communication system are provided. The method for transmitting resource allocation information in a base station (BS) includes allocating resources for each of one or more device-to-device (D2D) discovery resources pools, generating information about resources allocated for each of the one or more D2D discovery resource pools, and transmitting the generated information.