LTE-A Downlink Resource Allocation via Segmented RB Numbering
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Solution Overview
Problem
In the LTE Rel-8 system, there is a challenge in enabling LTE-A user equipment to access and use physical resources of both Rel-8 compatible and non-backward compatible frequency-domain resource segments within an extended carrier resource, ensuring seamless operation and resource allocation.
Innovation Solution
The transmission bandwidth resource is divided into frequency-domain resource blocks, with Rel-8 compatible blocks numbered according to the LTE system scheme and non-backward compatible blocks numbered sequentially referencing the largest Rel-8 compatible block, allowing LTE-A user equipment to obtain and receive downlink data based on received control signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If carrier resource extension is implemented to support larger bandwidth, then transmission bandwidth is improved, but resource allocation complexity increases
Solution Approach 1:
The extended carrier resource is segmented into two distinct parts: a first part using legacy LTE resource allocation rules and a second part using new resource allocation rules. This segmentation allows the system to support extended bandwidth while maintaining compatibility with existing LTE devices and procedures for the first part, while enabling enhanced resource allocation for the second part. The segmentation resolves the contradiction by dividing the complex extended resource space into manageable segments with different allocation characteristics.
2Adaptability or versatility
If backward compatibility is maintained for Rel-8 UEs, then system compatibility is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The downlink resource space is segmented into a first downlink resource corresponding to the first part of carrier resource (compatible with Rel-8 UEs) and a second downlink resource corresponding to the second part of carrier resource (for enhanced efficiency). This segmentation enables Rel-8 UEs to operate normally on the first resource while LTE-A UEs can utilize both first and second resources, thereby maintaining backward compatibility while improving overall resource utilization efficiency through the additional second resource.
Solution Approach 2:
The first downlink resource serves dual purposes: it is universally compatible with both Rel-8 UEs and LTE-A UEs, allowing both types of devices to access and utilize the same resource. This multi-functionality resolves the contradiction by making the resource allocation system adaptable to different UE types while maintaining efficient resource utilization through the complementary second downlink resource for LTE-A UEs.
3Manufacturing precision
If separate resource allocation rules are used for different UE types, then resource allocation precision is improved, but system complexity increases
Solution Approach 1:
The resource allocation system is segmented into two distinct allocation rule sets: legacy LTE rules for the first downlink resource and new enhanced rules for the second downlink resource. This segmentation enables precise resource allocation tailored to different UE types and resource characteristics, while the clear separation boundaries prevent confusion and manage system complexity through structured organization.
Solution Approach 2:
The network device acts as an intermediary that determines which resource allocation rules to apply based on UE type and resource characteristics. For Rel-8 UEs, the network applies legacy rules to the first resource; for LTE-A UEs, the network can apply enhanced rules to the second resource or coordinated rules across both resources. This intermediary control mechanism enables precise allocation while managing system complexity through centralized decision-making.
Data Source
AI summary
A method and apparatus for allocating downlink resources and implementing downlink data reception in a broadband evolution system are disclosed in the present invention, so as to implement the allocation of resources in case of carrier resource expansion and implement the reception of downlink data in case of carrier resource expansion. A method for receiving downlink data includes that: emission bandwidth resources are divided into multiple frequency-domain Resource Blocks (RBs), and every frequency-domain Resource Block (RB) corresponds to an RB serial number, wherein the frequency-domain RBs corresponding to Release-8 (Rel-8) compatible frequency-domain resources are numbered in a numbering mode of a Long Term Evolution (LTE) system, and the frequency-domain RBs corresponding to incompatible frequency-domain resources are orderly numbered based on the largest serial number corresponding to the Rel-8 compatible frequency-domain resources; when receiving a downlink control signaling including RB serial numbers transferred from a network side, a broadband evolution terminal obtains frequency-domain RBs corresponding to the RB serial numbers, and can receive downlink data from the obtained frequency-domain RBs.