Flexible Uplink Resource Allocation via Offset Bits
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Solution Overview
Problem
Current wireless communication systems face challenges in providing flexible allocation of uplink resources while minimizing the load on the PDCCH and reducing delay in preamble response, particularly in systems with limited bandwidth, leading to inefficient resource utilization and delayed preamble retransmissions.
Innovation Solution
Incorporating an additional bit in the uplink resource allocation information to indicate an offset by zero or more time subframes compared to a nominal value, allowing for precise identification of individual time subframes for uplink transmissions, thereby optimizing resource allocation and reducing signaling load on the PDCCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional uplink resource allocation is used in random access response, then the PDCCH signaling load increases and response delay increases, but the uplink resource allocation flexibility is limited
Solution Approach 1:
The patent changes the time parameter representation in uplink resource allocation by introducing an offset field that indicates the time difference between the random access response and the scheduled uplink transmission. This allows flexible allocation of uplink resources in future subframes without increasing PDCCH signaling load, as the offset value can be compactly encoded and interpreted by the UE to determine the exact transmission timing.
2Measurement precision
If traditional uplink resource allocation is used in random access response, then the PDCCH signaling load increases and response delay increases, but the uplink resource allocation precision is insufficient
Solution Approach 1:
The patent extracts the time allocation information from the traditional PDCCH-based resource allocation and represents it separately using an offset field in the random access response. This extraction allows precise identification of time subframes for uplink transmission while minimizing the signaling load on PDCCH, as the offset value concisely encodes the temporal relationship without requiring full resource allocation signaling.
Data Source
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AI summary
A method for allocating resources between a mobile communication device and a network access node is described. The method includes sending a random access preamble message to the network access node. Receiving a random access response message which includes a response to the random access preamble message is also included in the method. The response includes UL resource allocation information for scheduling an UL transmission. The UL resource allocation information includes information identifying one or more individual time subframes allocated for the UL transmission. The method also includes sending the UL transmission in the identified one or more individual time subframes. Apparatus and computer readable memory are also described