Frequency-Domain Resource Assignment Signaling in Wireless Networks
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Solution Overview
Problem
Current wireless communication networks, particularly in LTE and NR, face challenges in efficiently signaling frequency-domain resource allocations due to limited bits available for indicating resource block allocations, leading to inadequate support for all possible combinations of resource block assignments within an active bandwidth part.
Innovation Solution
The proposed solution involves encoding an indication of selected frequency-domain resource blocks using a resource indication value (RIV) corresponding to a starting virtual resource block and a length, allowing for more efficient use of available bits to signal resource assignments, even when the number of bits is insufficient to encode all assignable combinations within the active bandwidth part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional encoding methods are used for frequency-domain resource allocation, then all possible combinations of resource block assignments can be theoretically represented, but the number of bits required exceeds the available bits in the downlink control information
Solution Approach 1:
The resource block allocation is segmented into two independent parameters: a starting resource block index and a length of contiguous resource blocks. This segmentation allows the allocation to be represented by two smaller numbers instead of one large number, reducing the total bits required for encoding while still covering all possible allocation combinations.
Solution Approach 2:
The patent dynamically adjusts the encoding scheme based on the active bandwidth part size. By adapting the resource indication value encoding to the specific bandwidth part configuration, the system optimizes bit usage to match the actual resource allocation space required, avoiding allocation of bits for impossible or unused configurations.
2Adaptability or versatility
If more bits are allocated for resource assignment signaling, then all resource block combinations can be indicated, but the downlink control information size increases beyond available resources
Solution Approach 1:
The patent changes the parameters used to represent resource allocation from a single resource indication value to two parameters (starting index and length). This parameter transformation allows the same information to be encoded in fewer bits, reducing downlink control information size while maintaining full adaptability for all resource block combinations within the active bandwidth part.
3Adaptability or versatility
If the number of resource blocks in active bandwidth part increases, then more resource allocations can be supported, but the bits available for encoding become insufficient
Solution Approach 1:
The patent transitions from representing resource allocation in one dimension (a single resource indication value) to two dimensions (starting index and length). This dimensional change allows the system to support a larger number of resource blocks in the active bandwidth part while using the same or fewer bits, because the two-dimensional parameter space provides more efficient encoding for the same set of possible allocations.
Data Source
AI summary
Embodiments include methods in a communication system including host computer, base station, and UE. The base station can send the UE an indication of an active bandwidth part (BWP) of a size NZBWP,1size frequency-domain resource blocks (RBs), and select frequency-domain RBs, within the active BWP, to be assigned for carrying the user data to the UE. The base station can encode an indication of the selected frequency-domain RB(s) represented by a starting virtual RB, RBstart, and a length of contiguously allocated RBs, LRBs, using a number of bits. The number is a plurality and related to a size NBWP,2size of another BWP than the active BWP. NBWP,2size is smaller than NBWP,1size. The starting virtual RB is encoded with a resolution of K RBs, with K determined based on a ratio of NBWP,1size and NBWP,2size. The base station can send the encoded indication to the UE via a downlink control channel.