Carrier-Assisted CGI Measurement for Broadcast-Limited Cells
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Solution Overview
Problem
In a multi-carrier network system with a simplified signal transmission mode, terminal devices cannot perform CGI measurement due to the absence of system information broadcasting in certain cells, preventing proper configuration for CGI measurement.
Innovation Solution
A network device sends configuration information to a terminal device, indicating alternative locations or carriers where CGI information can be measured, allowing the terminal device to perform CGI measurement even when the target cell does not broadcast system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a simplified signal transmission mode is used where one carrier assists another carrier in broadcasting system information, then system information transmission efficiency is improved, but terminal devices cannot normally read SIB1 and measure CGI information in the assisted carrier cell
Solution Approach 1:
The patent introduces a basic carrier as an intermediary that assists the assisted carrier in broadcasting system information. The basic carrier acts as a mediator that contains and transmits the CGI information of the assisted carrier, enabling terminal devices to obtain measurement data through the intermediary rather than directly from the assisted carrier which lacks its own system information broadcasting capability.
Solution Approach 2:
The patent implements a copying mechanism where the system information (including CGI) of the assisted carrier is copied and broadcast by the basic carrier. The terminal device reads the SIB1 from the basic carrier which contains a copy of the assisted carrier's system information, allowing CGI measurement without the assisted carrier needing to broadcast its own system information.
2Loss of energy
If system information is not broadcast in the assisted carrier cell, then signal transmission is simplified and power consumption is reduced, but the terminal device cannot obtain CGI information for proper network configuration
Solution Approach 1:
The patent merges the system information broadcasting function of the assisted carrier with the basic carrier. The basic carrier combines its own system information with the copied system information of the assisted carrier in a single SIB1 broadcast, allowing the terminal to obtain both sets of information from one source without requiring the assisted carrier to consume additional power for separate broadcasting.
Solution Approach 2:
The basic carrier serves as an intermediary that holds and broadcasts the CGI information of the assisted carrier. This intermediary approach allows the assisted carrier to avoid the energy cost of system information broadcasting while ensuring that terminal devices can still obtain the necessary CGI information through the basic carrier's broadcasts.
3Ease of operation
If CGI measurement is not configured for assisted carrier cells, then the system operation is simplified, but proper network configuration and functionality cannot be ensured
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal device with the relationship between the basic carrier and assisted carrier before measurement is needed. The network device sends configuration information indicating that CGI measurement should be performed on the basic carrier to obtain information about the assisted carrier, so when measurement is required, the terminal already knows where to look for the information without complex real-time decision-making.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device measures CGI information on the basic carrier and reports it back to the network device. The network device then uses this feedback information to make proper configuration decisions for the assisted carrier, ensuring reliable network operation while maintaining simplified terminal-side procedures.
Data Source
AI summary
A network device sends first configuration information to a terminal device, where the first configuration information indicates the terminal device to perform cell global identifier CGI measurement, the first configuration information includes an identifier of a first cell and first indication information, and the first indication information indicates the terminal device to measure, in a second cell and/or on a first carrier, CGI information of the first cell. The network device receives a first CGI measurement result from the terminal device, where the first CGI measurement result includes the CGI information of the first cell or information indicating that the CGI information of the first cell fails to be obtained through measurement.