Packet Data Control Channel Prioritization in CDM TDM Systems
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Solution Overview
Problem
Existing mobile communication systems inefficiently utilize system resources due to fixed time intervals for packet data transmission and wastage of resources, as all available resources are used for packet data transmission even if not necessary.
Innovation Solution
Prioritization of packet data control channels and scheduling of packet data transmission using code division multiplexing (CDM) and/or time division multiplexing (TDM), allowing for efficient allocation of resources by transmitting control information and packet data on prioritized channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TDM method is used to transmit packet data sets to mobile stations, then packet data can be transmitted to each mobile station in different time intervals or in the same time interval by using different codes, but system resources are often wasted and it is very difficult to use the system resources efficiently
Solution Approach 1:
The patent applies dynamics by making the transmission resources and time intervals flexible rather than fixed. The base station dynamically allocates transmission time intervals and codes to mobile stations based on current system conditions and traffic requirements, allowing the system to adapt to varying demands and eliminate resource waste associated with static allocations.
Solution Approach 2:
The patent changes key parameters such as transmission time intervals, code assignments, and resource allocation patterns based on system conditions. By dynamically adjusting these parameters rather than using fixed values, the system can optimize resource utilization and prevent waste while maintaining efficient packet data transmission.
2Reliability
If all communication resources are allocated to each mobile station in fixed time intervals, then each mobile station can receive packet data reliably, but the system resources are often wasted when not all resources are necessary
Solution Approach 1:
The patent applies partial action by allocating only the necessary portion of system resources to each mobile station at any given time, rather than allocating all available resources. The base station determines the appropriate amount of resources needed based on current traffic conditions and allocates accordingly, preventing resource waste while ensuring sufficient resources are available for reliable transmission.
Solution Approach 2:
The patent makes resource allocation dynamic by continuously adjusting the quantity of resources allocated to each mobile station based on real-time system conditions. This allows the system to provide sufficient resources for reliable communication when needed while reducing resource consumption during periods of lower demand.
3Device complexity
If fixed time intervals are used for packet data transmission, then transmission scheduling is simple, but it is very difficult to use the system resources efficiently
Solution Approach 1:
The patent transitions from static fixed time intervals to dynamic time interval allocation. The base station determines transmission time intervals based on current system conditions, allowing efficient resource utilization while managing complexity through centralized control and adaptive scheduling algorithms.
Data Source
AI summary
A method of transmitting packet data in a CDM and TDM mobile data communication system is provided. The method comprises determining priorities of one or more control channels, transmitting control information related to one or more packet data sets to one or more mobile stations through corresponding control channels according to the priorities; and transmitting the one or more packet data sets to each mobile station through one or more data channels that correspond to the one or more control channels, respectively. And, a frame duration of the higher priority data control channel restricts a frame duration of the lower priority data control channel.