Discontiguous Resource Allocation for 5G URLLC Services
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in effectively supporting heterogeneous services and minimizing performance deterioration when a high-priority service needs to be transmitted while a low-priority service is already allocated resources, especially in scenarios requiring ultra-reliable and low-latency communication (URLLC) services.
Innovation Solution
The method involves allocating resources for a second service with high priority by considering the resources already allocated to a first service, using a preemption-based multiplexing scheme that allows for logical or physical discontiguous allocation in the frequency axis, and providing resource allocation information using start points and lengths to minimize interference and optimize resource use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated to a first service (low priority), then resource utilization is improved, but performance deterioration occurs when a second service (high priority) needs to preempt those resources
Solution Approach 1:
The patent segments resources into different priority levels and uses separate resource pools for different services. The first resource pool is dedicated to the first service while the second resource pool is dedicated to the second service, allowing independent resource allocation without mutual interference. This segmentation enables the system to maintain resource utilization for the first service while protecting it from performance deterioration due to preemption by the second service.
2Loss of time
If a second service (high priority) preempts resources allocated to a first service, then the second service's latency requirement is improved, but the first service experiences performance deterioration
Solution Approach 1:
The patent implements dynamic resource allocation where the allocation of resources to the first service can be adjusted based on the needs of the second service. When the second service requires resources, the system dynamically allocates from the second resource pool without affecting the first service's dedicated resources. This dynamic mechanism ensures the second service meets its latency requirements while protecting the first service from performance deterioration.
3Ease of operation
If contiguous resources are allocated in frequency axis, then resource allocation simplicity is improved, but flexibility to support heterogeneous services with different priority requirements deteriorates
Solution Approach 1:
The patent introduces a new dimension for resource allocation by creating separate resource pools (first resource pool and second resource pool) with different allocation characteristics. The first resource pool uses contiguous allocation for simplicity, while the second resource pool uses non-contiguous allocation for flexibility. This dimensional separation allows the system to maintain allocation simplicity where needed while achieving flexibility for heterogeneous services through the additional resource pool dimension.
Data Source
AI summary
Disclosed is a 5G (5th generation) or pre-5G communication system for supporting a data transmission rate higher than that of a 4G (4th generation) communication system such as a long term evolution (LTE). The present disclosure is for allocating and indicating resources in a wireless communication system, and an operation method of a base station comprises the steps of: allocating a first resource for a first service; allocating a second resource for a second service in consideration of the first resource; and transmitting resource allocation information on the second resource and data of the second service, wherein the second resource is discontinuously allocated, at a frequency axis, in a logical or physical manner, and the resource allocation information indicates the second resource by using at least one starting location and at least one length.