Relay Station Control Information Encoding for LTE Resource Allocation
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Solution Overview
Problem
In wireless communication systems, particularly in LTE standards, the relay stations face challenges in accurately decoding control information for resource allocation due to the uncertainty in correspondence between control channel elements and downlink control information, leading to inefficient data relay processes.
Innovation Solution
The method involves encoding control information for relay stations and user equipment using distinct numbers of control channel elements (CCEs) and scrambling CRC parity bits with specific identifiers, allowing for precise resource allocation and decoding by each entity, thereby preventing incorrect decoding by user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits control information to relay station and user equipment using the same encoding method, then the system structure is simple, but the relay station cannot accurately decode control information for resource allocation
Solution Approach 1:
The patent divides the control information encoding into separate methods for relay stations and user equipment. The base station applies different encoding methods (first encoding method for relay stations, second encoding method for user equipment) to ensure that each receiver can accurately decode the control information intended for it, resolving the ambiguity in traditional unified encoding approaches.
Solution Approach 2:
The patent applies different encoding characteristics to different target receivers. The first encoding method uses specific parameters optimized for relay station decoding, while the second encoding method uses parameters optimized for user equipment decoding. This local differentiation ensures optimal decoding performance for each receiver type without requiring complex universal decoding mechanisms.
2Productivity
If the base station uses blind decoding method for control information, then the system is flexible in handling unknown control information formats, but the relay station experiences inefficient data relay process
Solution Approach 1:
The base station performs preliminary encoding with specific identifiers and parameters before transmission. The relay station, knowing the encoding method in advance, can directly decode the control information without time-consuming blind decoding processes. This preliminary preparation of control information with explicit encoding parameters significantly reduces decoding time and improves data relay efficiency.
3Manufacturing precision
If the relay station decodes control information using user equipment encoding parameters, then the decoding process is simplified, but incorrect decoding occurs leading to resource allocation errors
Solution Approach 1:
The patent employs asymmetric encoding parameters for relay stations versus user equipment. The first encoding method uses parameters asymmetrically designed for relay station capabilities, while the second encoding method uses different parameters for user equipment. This asymmetry prevents incorrect decoding by ensuring that relay stations use the appropriate encoding parameters, maintaining precise resource allocation without requiring overly complex universal decoding solutions.
Data Source
AI summary
A method for a base station to transmit data, the data to be relayed by a relay station to user equipment, the method including: encoding, based on an identification of the relay station or an identification of the user equipment, control information that indicates resource allocation for the relay station; and transmitting the control information to the relay station.