LTE Transmission Device Resource Block Allocation
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Solution Overview
Problem
Existing communication devices in LTE systems face issues when the number of necessary resource blocks for distributed transmission is not an integral multiple of the division number, leading to extra or unallocated resource blocks, which complicates signaling and resource allocation.
Innovation Solution
A transmission device that allocates resource blocks into consecutive frequency subcarriers and divides them into distributed-type blocks, using a predetermined division number to determine block locations and identification numbers, allowing for efficient allocation without increasing signaling bits, even when the number of resource blocks for distributed transmission is not an integral multiple of the division number.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource blocks are divided into plural parts for distributed transmission, then frequency diversity is improved, but the number of signaling bits increases when the number of resource blocks is not an integral multiple of the division number
Solution Approach 1:
The patent determines the number of resource blocks to be used for distributed transmission in advance, before actual transmission. This preliminary determination allows the system to pre-calculate which resource blocks will be used, enabling the mobile station to identify allocated resource blocks without requiring additional signaling bits to indicate the division number or allocation pattern.
Solution Approach 2:
The mobile station autonomously determines which resource blocks are allocated to it for distributed transmission by using the predetermined division number and the total number of resource blocks to be used. The mobile station performs self-identification of allocated resource blocks without requiring the base station to explicitly signal the allocation pattern, thereby reducing signaling overhead.
2Adaptability or versatility
If the number of resource blocks for distributed transmission is not an integral multiple of the division number, then resource allocation flexibility is improved, but extra or unallocated resource blocks are generated
Solution Approach 1:
The patent changes the parameter of using a predetermined division number that is independent of the actual number of resource blocks to be used. By fixing the division number in advance and allowing the number of used resource blocks to vary independently, the system achieves flexible resource allocation without requiring the number of resource blocks to be an integral multiple of the division number, thereby avoiding extra or unallocated resource blocks.
3Measurement precision
If a bitmap is used to indicate allocation information for each resource block, then allocation precision is improved, but signaling complexity increases
Solution Approach 1:
The patent extracts and removes the need for bitmap signaling by using a predetermined division number approach. Instead of using detailed bitmap information to indicate allocation for each resource block, the system extracts only the essential information (total number of resource blocks to be used) and allows the mobile station to derive the allocation pattern independently, thereby reducing signaling complexity while maintaining allocation precision.
Data Source
Figure 1A~1B
Figure 2A
Figure 2B
AI summary
A disclosed transmission device includes a frequency scheduling unit configured to allocate a resource block divided from a system bandwidth into blocks of consecutive frequency subcarriers or distributed-type resource blocks including discretely-distributed frequency subcarriers in a system bandwidth and divided from the resource block, assign locations and identification numbers of the distributed-type resource blocks divided by a predetermined division number with respect to each resource block, and determine the distributed-type resource blocks to be allocated to a user based on the assigned locations of the distributed-type resource blocks; a mapping unit configured to allocate transmission data to either the resource block or distributed-type resource blocks in accordance with the allocation; and a control information generating unit configured to generate control information with respect to a mobile station to which either the resource block or the distributed-type resource blocks are allocated based on the identification numbers.