Wireless Terminal Category Designation for Frequency Setting
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Solution Overview
Problem
In wireless communications, especially in systems like W-CDMA and E3G, the conventional method of setting uplink and downlink frequencies requires a large volume of control information, complicating the control process and making high-speed frequency setting challenging due to fixed frequency differences and separate bandwidth settings.
Innovation Solution
The proposed solution involves a wireless communication system that designates a terminal category based on terminal capability information, allowing for simplified frequency setting by using a control signal that represents the frequency difference between uplink and downlink frequencies, reducing the number of bits required for control information and enabling faster frequency setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate bandwidth settings for uplink and downlink are used with fixed frequency differences, then frequency resource assignment is simplified, but the volume of control information increases and frequency setting speed decreases
Solution Approach 1:
The patent combines the setting of uplink and downlink frequency bandwidths into a single unified process. Instead of separately configuring uplink bandwidth and downlink bandwidth with fixed frequency differences, the system uses a single frequency bandwidth setting that applies to both directions, thereby reducing control information volume and improving frequency setting speed.
Solution Approach 2:
The patent changes the frequency bandwidth parameter from separate fixed values for uplink and downlink to a single variable parameter. This allows the frequency bandwidth to be dynamically adjusted based on terminal capability and service requirements, reducing the control bits needed while enabling faster frequency configuration.
2Measurement precision
If 14-bit control signals are transmitted for frequency information, then precise frequency assignment is achieved, but the control information volume becomes large
Solution Approach 1:
The patent uses partial action by transmitting only the necessary portion of frequency information. Instead of always transmitting full 14-bit frequency values for both uplink and downlink, the system transmits reduced-bit control signals that provide sufficient precision for the actual frequency bandwidth being used, thereby reducing control information volume while maintaining adequate assignment precision.
3Device complexity
If terminal capability information is used to designate terminal categories, then frequency setting is simplified and control bits are reduced, but adaptability to different terminal requirements may be limited
Solution Approach 1:
The patent creates a universal terminal category classification system that can accommodate multiple terminal types and capabilities through a standardized framework. By defining terminal categories based on key capability parameters, the system achieves simplified control processes while maintaining versatility through the ability to assign different frequency bandwidths and configurations to different category groups.
Data Source
AI summary
A wireless communication system includes a terminal capability information reception unit to receive and extract terminal capability information, the terminal capability information indicating at least one of an uplink frequency bandwidth as a capability of a wireless terminal device and a downlink frequency bandwidth as a capability of the wireless terminal device; a terminal category setting unit to identify a terminal category to which the wireless terminal device belongs, based on the terminal capability information; and a link setting unit to set a link between a base station and the wireless terminal device and to transmit a control signal depending on the link setting between the base station and the wireless terminal device, based on the terminal category set by the terminal category setting unit.