Resource Allocation Indication Method for MTC UEs
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Solution Overview
Problem
Current resource indication methods for Machine Type Communication (MTC) User Equipment (UE) in LTE/LTE-A systems are inflexible and inefficient, particularly due to limitations in resource allocation, which restricts the ability to indicate continuous or discontinuous resource blocks, leading to higher overhead and reduced spectral efficiency.
Innovation Solution
A method for indicating resource allocation using a binary number system that determines the required number of indication bits based on the number of allocable resources and the maximum number of resources supported by UE, allowing for flexible scheduling by converting decimal numbers into binary formats that represent continuous or discontinuous resource allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource allocation type 1 (bitmap based on RBG) is used, then resource indication is possible, but it cannot indicate one or more RBs in any 6 continuous RBs, reducing flexibility
Solution Approach 1:
The patent changes the fundamental parameter of resource indication from bitmap-based (type 1 and type 2) to a new mathematical mapping method using modulo operation and one-to-one correspondence. This allows indicating m continuous RBs (where 1≤m≤M and M≤6) starting from any position, achieving flexible scheduling while using only ⌈log2((N-M+2)×2^(M-1)-1)⌉ bits.
2Adaptability or versatility
If resource allocation type 2 (continuous resource allocation) is used, then continuous resources can be indicated, but it cannot indicate multiple discontinuous RBs in any 6 continuous RBs, reducing versatility
Solution Approach 1:
The patent introduces a new parameter mapping mechanism where the resource allocation indication value r (or transformed R) maps to resource indices through modulo operation and one-to-one correspondence functions (v1i, v2i, v3i, or v4i). This enables indicating multiple discontinuous RB patterns while maintaining compact bit representation.
3Quantity of substance
If the number of indication bits is reduced to match M≤6 limitation, then overhead is reduced, but the ability to indicate flexible resource allocations is compromised
Solution Approach 1:
The patent optimizes the indication bit number to Q=⌈log2((N-M+2)×2^(M-1)-1)⌉ bits by changing the mathematical mapping approach. This compact representation achieves both reduced overhead and full flexibility to indicate any m continuous RBs (1≤m≤M) starting from any position among N total RBs, resolving the contradiction between bit length and scheduling flexibility.
4Productivity
If traditional bitmap methods are used for resource indication, then simple implementation is achieved, but spectral efficiency is reduced due to higher overhead
Solution Approach 1:
The patent changes the indication method from traditional bitmap (which requires more bits) to a mathematical mapping method using modulo operation and one-to-one correspondence. This reduces the indication overhead to Q=⌈log2((N-M+2)×2^(M-1)-1)⌉ bits while maintaining full resource allocation flexibility, thereby improving spectral efficiency for MTC services.
Data Source
AI summary
The document discloses a method and device for indicating a resource allocation. The method includes: determining a number of required indication bits according to the following parameters: a number N of allocable resources in a system, and a maximum number M of allocated resources supported by UE, herein 2≤M<N; and indicating the resource allocation by adopting a binary number, herein a bit number of the binary number is equal to the determined number of the indication bits.