Uplink Resource Allocation via PUSCH Scheduling Requests
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Solution Overview
Problem
In LTE systems, conventional uplink data transmission faces challenges with limited PUCCH and PUSCH resources, high signaling overheads, and increased transmission delays, especially in scenarios requiring low latency like IoT and multi-UE real-time gaming, where semi-persistent scheduling can lead to resource conflicts and wastage.
Innovation Solution
A method where a base station configures a resource request parameter for UE, allocates a PUSCH resource for sending resource request information, and upon detection, allocates a second PUSCH resource for data transmission, using cyclic shift values and shared SPS resources to avoid conflicts and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional dynamic scheduling is used for uplink data transmission, then the system can handle general traffic requirements, but signaling overheads are high and scheduling process is complex for small data packets with low delay requirements
Solution Approach 1:
The patent segments the scheduling process by separating resource allocation into two stages: first allocating PUCCH resources for scheduling requests, then allocating PUSCH resources for data transmission based on detected requests. This segmentation reduces the complexity of the overall scheduling process while maintaining transmission efficiency.
Solution Approach 2:
The patent implements preliminary action by pre-configuring PUCCH resources for scheduling requests before actual data transmission occurs. The base station预先 allocates resources and detects requests in advance, enabling faster response to uplink transmission needs without complex real-time scheduling decisions.
2Adaptability or versatility
If PUCCH resources are allocated for scheduling requests, then UEs can send resource requests, but PUCCH capacity is limited and cannot accommodate all UEs simultaneously
Solution Approach 1:
The patent applies universality by allowing PUSCH resources to serve dual purposes: both for data transmission and for carrying scheduling requests. When PUCCH resources are insufficient, UEs can utilize PUSCH resources to send scheduling requests, effectively expanding the system's overall request handling capacity beyond PUCCH limitations.
Solution Approach 2:
The patent transitions from a single-dimension resource allocation (only PUCCH for requests) to a multi-dimensional approach by introducing PUSCH as an additional resource dimension. This allows scheduling requests to be transmitted through multiple channels (PUCCH and PUSCH), effectively increasing the system's adaptability to handle more UEs simultaneously.
3Device complexity
If semi-persistent scheduling is used to allocate PUSCH resources, then resource allocation is simplified, but resource conflicts occur when multiple UEs contend for the same resource
Solution Approach 1:
The patent implements feedback mechanisms where the base station detects scheduling requests on pre-configured resources and responds by allocating dedicated PUSCH resources to requesting UEs. This feedback loop allows the system to maintain simple semi-persistent scheduling configurations while dynamically resolving conflicts through base station intervention, ensuring reliable resource allocation without increasing overall system complexity.
Data Source
AI summary
A transmission method, a transmission apparatus, a network device, and user equipment are provided, and are applied to the field of communications technologies. The method includes: configuring, by a base station, a resource request parameter for first UE; allocating a first PUSCH resource used by the first UE to send resource request information; and allocating, to the first UE when the base station detects, on the first PUSCH resource, resource request information sent by the first UE, a second PUSCH resource used for sending data. In this way, PUCCH capacity limitation is effectively mitigated, and more UEs can send resource requests, so that resource usage in an uplink transmission process can be increased, and a system capacity can be increased.