Relay Downlink Resource Block Allocation for Wireless Systems
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Solution Overview
Problem
Radio communication systems face inefficiencies in utilizing downlink resources, particularly in allocating and managing resource units across multiple access systems like CDMA, FDMA, TDMA, OFDMA, and SC-FDMA, which affects data transmission and scheduling.
Innovation Solution
A method and device for receiving downlink signals in a wireless communication system, where a user equipment receives first control information for downlink scheduling in one slot of a resource block pair, followed by data reception in the second slot if specific allocation criteria are met, and attempts to detect uplink scheduling information in the second slot based on resource unit allocation bit values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If downlink resources are allocated using traditional multiple access systems (CDMA, FDMA, TDMA, OFDMA, SC-FDMA), then various communication services can be provided, but downlink resource utilization efficiency is insufficient
Solution Approach 1:
The patent applies multi-functionality by enabling the downlink resource block pair to serve dual purposes: the first slot carries downlink control information for scheduling, while the second slot can dynamically carry either data or uplink control information based on allocation bit values. This allows the same physical resources to support multiple communication functions (downlink data transmission and uplink scheduling) without requiring separate dedicated resources, thereby improving overall resource utilization efficiency while maintaining support for various communication services
2Productivity
If the second slot is always used for data transmission, then downlink data throughput is maintained, but flexibility in resource allocation is reduced
Solution Approach 1:
The patent implements dynamics by introducing allocation bits in the downlink control information that dynamically determine the function of the second slot. When allocation bits indicate one value, the second slot carries data; when they indicate another value, the second slot carries uplink control information. This dynamic switching capability allows the system to adapt resource allocation based on instantaneous traffic conditions and scheduling requirements, providing both high data throughput and flexible resource management
3Adaptability or versatility
If uplink scheduling information is always transmitted in the second slot, then uplink scheduling flexibility is improved, but downlink data transmission opportunities are reduced
Solution Approach 1:
The patent applies local quality by using allocation bits to locally control the function of specific resource units (second slots) within the downlink resource allocation. Instead of uniformly dedicating entire second slots to either data or uplink control information, the system can selectively assign different functions to different resource units based on local scheduling needs. This allows uplink scheduling information to be transmitted in specific second slots when needed, while other second slots remain available for downlink data transmission, thereby achieving both uplink scheduling flexibility and maintaining downlink data transmission opportunities
Data Source
AI summary
A method for receiving a relay physical downlink control channel (R-PDCCH) at a relay in a wireless communication system is discussed. The method according to one embodiment includes receiving first control information for downlink scheduling in a first slot of a set of resource block (RB) pairs. The first control information includes allocation information on one or more resource units. The method according to the embodiment further includes monitoring second control information in a second slot of the set of RB pairs. If the R-PDCCH is assigned to the second slot of the set of RB pairs, the R-PDCCH is configured to carry control information for uplink scheduling.