Cyclic Shift Resource Mapping for User Equipment Bandwidth Adaptation
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Solution Overview
Problem
In LTE systems, inflexible resource mapping due to non-standardized bandwidths can lead to communication disruptions between base stations and user equipment, as existing methods rely on ascending order frequency domain resource allocation, which may not match the capabilities of user equipment, resulting in inefficient resource utilization.
Innovation Solution
A resource mapping method that uses cyclic shift techniques to determine resource block locations within the bandwidth used by user equipment, allowing for flexible mapping of channels and signals by indicating cyclic shift start or end resource block locations, enabling efficient use of available bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource mapping is performed in ascending order of frequency domains of all physical resource blocks in the system bandwidth of the base station, then resource allocation follows a standardized approach, but user equipment cannot use resource blocks beyond its capability when system bandwidth exceeds user equipment bandwidth
Solution Approach 1:
The patent applies local quality by mapping channels and signals to specific resource blocks within the user equipment's capable bandwidth range rather than uniformly across the entire system bandwidth. The base station identifies the user equipment's bandwidth capability and performs resource mapping only within that local range, ensuring resources are allocated where the user equipment can actually use them.
Solution Approach 2:
The patent implements dynamics by making the resource mapping range adaptive to user equipment capabilities. The base station dynamically determines the mapping range based on each user equipment's bandwidth capability, allowing the system to flexibly adjust resource allocation boundaries rather than using a fixed system-wide bandwidth boundary.
2Adaptability or versatility
If the system bandwidth of the base station does not match the bandwidth used by user equipment, then network access capabilities of various user equipments can be adapted, but inflexible resource mapping affects normal communication between base station and user equipment
Solution Approach 1:
The patent applies parameter changes by modifying the resource mapping parameters (start resource block and end resource block) according to user equipment bandwidth capability. The base station adjusts these parameters dynamically based on the user equipment's actual bandwidth usage, enabling flexible resource allocation that adapts to different network access capabilities.
3Productivity
If resource mapping is performed across the entire system bandwidth of the base station, then resource utilization of the base station is maximized, but user equipment with limited bandwidth cannot access resources beyond its capability
Solution Approach 1:
The patent applies segmentation by dividing the system bandwidth into multiple resource blocks and then further segmenting the usable portion based on user equipment capability. The base station segments the resource blocks and allocates only the appropriate subset to each user equipment, ensuring that resources are divided into manageable units that match user equipment bandwidth constraints.
Data Source
AI summary
Embodiments of the present invention provide a resource mapping method and an apparatus, and relate the communications field, so as to flexibly implement resource mapping of a channel or a signal. First information is obtained. The first information is used to indicate a cyclic shift start resource block location or a cyclic shift end resource block location for resource mapping of a first channel or a first signal in a resource block cyclic shift manner in a bandwidth used by user equipment. A resource mapping location of the first channel or the first signal in the bandwidth used by the user equipment is determined according to the resource block cyclic shift manner and the first information. The first channel or the first signal is received or sent at the resource mapping location. The resource mapping method and the apparatus are used to map a resource.