e-PDCCH Resource Allocation Avoiding Synchronous Signal Collisions
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Solution Overview
Problem
In wireless communication systems, there is a challenge in preventing collisions between e-PDCCH and specific regions where system information is transmitted, such as the resource region containing synchronous signals and system information, which affects the reliable transmission and reception of control information.
Innovation Solution
The method involves performing blind decoding for control information in a resource region other than the time unit indicated by the physical control format indicator channel (PCFICH) on a subframe, with the specific resource region determined based on whether synchronous signals or system information is transmitted, thereby avoiding collisions with regions containing synchronous signals or system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If e-PDCCH is transmitted in the resource region indicated by PCFICH, then the control information transmission capacity is improved, but collision with synchronous signals or system information occurs
Solution Approach 1:
The resource region is segmented into multiple parts based on PCFICH indications. The e-PDCCH is transmitted in specific segments (resource blocks) that are dynamically identified as available, while avoiding segments occupied by synchronous signals or system information. This segmentation allows efficient utilization of available resources without causing collisions.
Solution Approach 2:
The resource allocation for e-PDCCH is made dynamic through PCFICH-based indications. The base station dynamically determines which resource blocks are available for e-PDCCH transmission in each subframe, adapting to the presence or absence of synchronous signals and system information. This dynamic adjustment prevents collisions while maximizing transmission capacity.
2Reliability
If blind decoding is performed across the entire resource region, then the probability of finding control information is improved, but the complexity of decoding operations increases
Solution Approach 1:
The blind decoding operation is localized to specific resource blocks indicated by PCFICH rather than searching the entire resource region. Each UE performs blind decoding only in the locally identified available resource blocks, which reduces the number of decoding attempts required while ensuring that control information is found with high probability.
Solution Approach 2:
The PCFICH provides preliminary information about which resource blocks will be available for e-PDCCH transmission before the actual transmission occurs. This preliminary indication allows UEs to prepare their blind decoding operations in advance, focusing only on the relevant resource blocks and avoiding unnecessary decoding attempts in occupied resources.
Data Source
AI summary
An embodiment of the present invention relates to a method in which a terminal receives control information in a wireless communication system, said method comprising: a step of performing blind decoding in at least one portion of a resource region except the time unit indicated by a physical control format indicator channel (PCFICH) on a subframe, said at least one portion of the resource region is determined by whether a synchronizing signal or system information is transmitted or not.