Reduced Capability UE Resource Allocation for Power Saving
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Solution Overview
Problem
Wireless communication systems face challenges in supporting reduced capability user equipment (UE) with limited bandwidth, low complexity, and reduced antenna numbers, as existing techniques require wider bandwidths and longer transmission times, which are not beneficial for power-saving devices like IoT or MTC devices.
Innovation Solution
The described techniques involve a UE capability message indicating reduced capabilities, allowing the base station to select a resource allocation scheme for downlink grants, including interleaved/discontinuous resource blocks, low coding rates, and intra-slot repetition, to optimize data transmissions for reduced capability UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional resource allocation schemes are used for reduced capability UEs, then data transmission can be achieved, but the UE requires wider bandwidth and longer transmission time which increases power consumption
Solution Approach 1:
The patent segments the bandwidth into narrower resource blocks and uses discontinuous resource allocation patterns. The base station allocates resources in a segmented manner tailored to the reduced capability UE's narrower bandwidth, enabling power-saving operation while maintaining acceptable data transmission efficiency through optimized segmentation strategies.
Solution Approach 2:
The patent implements dynamic resource allocation where the base station adapts the resource allocation scheme based on real-time conditions and UE capability indications. The system dynamically adjusts allocation parameters to balance power consumption and transmission efficiency for reduced capability UEs operating under varying network conditions.
2Use of energy by moving object
If reduced capability UEs use narrower bandwidth, then power consumption is reduced, but data transmission reliability may be compromised
Solution Approach 1:
The patent changes multiple transmission parameters simultaneously including coding rate, modulation scheme, and resource allocation pattern. By adjusting these parameters in a coordinated manner, the system maintains data transmission reliability for reduced capability UEs operating with narrower bandwidth, compensating for the reduced spectral efficiency through optimized parameter combinations.
Solution Approach 2:
The system incorporates feedback mechanisms where the UE indicates its capability type and the base station adjusts the resource allocation scheme accordingly. This feedback loop enables continuous optimization of transmission parameters to maintain reliability while operating at reduced power levels.
3Adaptability or versatility
If the base station uses fixed resource allocation schemes, then system complexity is reduced, but adaptability to different UE capabilities is insufficient
Solution Approach 1:
The patent implements a hierarchical approach where the base station maintains a set of predefined resource allocation schemes for different UE capability types. Rather than implementing a fully adaptive complex system, the base station selects from predefined partial solutions that match UE capability indications, achieving adequate adaptability with reduced computational complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a UE capability message to a base station, the UE capability message including an indication of a UE type, wherein the UE type is associated with at least one of a reduced bandwidth, or a reduced number of antennas, or a combination thereof for the UE. The UE may receive, based at least in part on the UE capability message, a downlink grant for downlink resources for a data transmission in accordance with a resource allocation scheme, wherein the resource allocation scheme is associated with the UE type and a supported bandwidth part of the UE. The UE may monitor a wireless channel based at least in part on the downlink grant. The UE may receive the data transmission based at least in part on the monitoring of the wireless channel.