Wireless Resource Determination for Downlink Communication
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Solution Overview
Problem
In wireless communication systems, it is challenging to maintain long-term reception states due to terminal battery life, and existing power-saving methods through intermittent operation reduce available wireless resources for downlink data transmission, leading to potential interference and resource overlap between terminals.
Innovation Solution
A communication device and method that determines wireless resources for downlink communication without signaling between the base station and terminal, using a pseudo-random number generator to allocate resources based on terminal IDs and time information, ensuring non-overlapping resource allocation and minimizing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the base station transmits control frames with intermittent operation parameters to each terminal in advance, then the terminal can perform power saving by intermittent operation, but the wireless resources available for downlink data transmission are reduced
Solution Approach 1:
The terminal determines wireless resources for downlink communication in advance by generating a random number sequence using a pseudo-random number generator with initial values including terminal ID and time information. This preliminary determination eliminates the need for base station signaling of intermittent parameters, thereby preserving downlink data transmission resources while enabling terminal power saving operations.
Solution Approach 2:
The terminal autonomously determines its own wireless resources for downlink communication by using its terminal ID and time information as initial values for the pseudo-random number generator. This self-service approach eliminates dependency on base station control frames for resource allocation, reducing signaling overhead and preserving downlink capacity.
2Use of energy by moving object
If fixed intermittent parameters and frequency are assigned to each terminal, then the terminal can perform intermittent operation, but wireless resources may overlap between terminals and the terminal may be affected by interference from other systems
Solution Approach 1:
The wireless resources for downlink communication are dynamically determined for each terminal based on terminal ID and time information as initial values for the pseudo-random number generator. This dynamic approach ensures that resources do not overlap between terminals with similar parameters and allows adaptation to avoid interference from other systems, while still enabling power saving through intermittent operation.
Solution Approach 2:
The initial values for the pseudo-random number generator include terminal ID and time information, which vary between terminals and over time. This parameter variation ensures that the generated random number sequences and corresponding wireless resources are unique to each terminal and time slot, preventing resource overlap and interference while maintaining power saving capabilities.
Data Source
AI summary
There is provided a communication device that determines a wireless resource for a downlink without performing signaling between a base station and a terminal. A communication device includes a communication unit that transmits and receives a wireless signal, and a wireless resource determination unit that determines a wireless resource used for transmission and reception. The wireless resource determination unit determines, in a communication system including a base station and a terminal, on the basis of a common rule between the base station and the terminal, a plurality of candidates for the wireless resource to be used for downlink communication in the slot for each terminal, and then selects the plurality of candidates for each terminal one by one in such a manner that wireless resources do not overlap between the terminals.