Multi-band Resource Indication Value Allocation in LTE Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE wireless communication systems, existing methods for resource allocation in multi-band supporting user equipment (UE) face challenges in transmitting and receiving resource allocation information without incurring additional signaling overhead, as the resource indication value (RIV) allocated to single-band supporting UEs is insufficient for multi-band scenarios.
Innovation Solution
The method involves detecting and transmitting a resource indication value (RIV) that indicates both the start index and length of consecutive virtual resource blocks (VRBs) allocated to multi-band supporting UEs, allowing them to receive information from multiple frequency bands, while maintaining compatibility with single-band UEs by using a binary bit field that can represent both valid and invalid RIVs, thereby avoiding additional signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing RIV allocation methods are used for multi-band UEs, then single-band compatibility is maintained, but resource allocation capability for multi-band scenarios is insufficient
Solution Approach 1:
The RIV field is designed to serve multiple purposes: it allocates resources for both single-band and multi-band UEs using the same signaling mechanism. By interpreting the same RIV value differently based on UE capability, the system achieves universal resource allocation without requiring separate signaling paths or additional overhead for multi-band scenarios.
Solution Approach 2:
The interpretation of the RIV parameter changes based on UE capability. For multi-band UEs, the RIV is decoded using a different mapping relationship that accounts for multiple frequency bands, while single-band UEs use the traditional decoding method. This parameter interpretation change enables enhanced functionality without modifying the signaling structure.
2Measurement precision
If additional signaling is introduced for multi-band resource allocation, then resource allocation precision is improved, but signaling overhead increases
Solution Approach 1:
The existing RIV field in the downlink control information is made multi-functional to simultaneously support resource allocation for both single-band and multi-band UEs. This eliminates the need for separate signaling mechanisms while maintaining precise resource allocation capability through capability-based interpretation differences.
Solution Approach 2:
The system uses the UE's own capability information to determine how to interpret the RIV value. Each UE independently determines its resource allocation based on its capability and the received RIV, without requiring additional network signaling to specify the allocation method. This self-service approach reduces signaling overhead while maintaining allocation precision.
Data Source
AI summary
A method is described for receiving data from a base station by a first type user equipment (UE) capable of using a plurality of frequency bands based on resource allocation in a first wireless mobile communication system capable of using the plurality of frequency bands. Each of the plurality of frequency bands has a respective bandwidth for a second wireless mobile communication system. Specific control information is received from the base station indicating whether a specific frequency band among the plurality of frequency bands is used for downlink resource allocation or not. Control information reception resources comprise a common resource area and a first type UE-specific resource area. The common resource area is for both the first type UE and a second type UE, the second type UE adapted for the second wireless mobile communication system not capable of using the plurality of frequency bands.