Terminal Device System Information Acquisition via Virtual Carrier
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Solution Overview
Problem
Reduced-capability terminal devices in LTE-based wireless telecommunications systems face challenges in acquiring and processing system information, particularly in coverage enhancement situations, due to the complexity and bandwidth requirements of existing systems.
Innovation Solution
A method is introduced where terminal devices receive a system information block containing a list of parameter values, determining supported values and receiving associated blocks, allowing for efficient acquisition and processing of relevant system information, even in reduced capability scenarios, by using a virtual carrier approach that restricts bandwidth and processing needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If advanced data modulation techniques and wide bandwidth usage are employed in LTE networks, then data rates and network capability are improved, but device complexity and cost increase
Solution Approach 1:
The patent segments the system information acquisition process into multiple stages: initial broadcast reception of system information at full bandwidth, followed by selective retransmission requests for specific information blocks. This allows terminal devices with limited bandwidth capability to acquire essential system information without requiring full LTE bandwidth support, thereby reducing device complexity while maintaining network functionality.
Solution Approach 2:
The patent introduces a mechanism where the network dynamically adjusts system information transmission parameters based on terminal device capability. The eNodeB receives capability information from terminal devices and modifies the system information block transmission accordingly, allowing adapted bandwidth and modulation parameters that match the terminal's capabilities rather than forcing full LTE specifications on all devices.
2Adaptability or versatility
If system information blocks contain comprehensive parameter lists for all network configurations, then network adaptability is improved, but information processing complexity increases
Solution Approach 1:
The patent divides the system information into multiple discrete blocks (e.g., SIB1, SIB2, SIB3) with specific functions. Each block contains targeted parameter information rather than a monolithic comprehensive list. Terminal devices can selectively request and process only the relevant blocks needed for their current operation, reducing processing complexity while maintaining complete network adaptability.
Solution Approach 2:
The patent implements preliminary broadcast of system information blocks to all terminal devices before individualized processing. The eNodeB transmits comprehensive system information initially, then uses subsequent signaling to provide targeted retransmissions or supplements based on device capability. This preliminary action ensures all devices receive essential information without requiring each device to independently parse the entire information set.
3Area of stationary object
If coverage enhancement is implemented through repeated system information transmission, then coverage area is improved, but energy consumption increases
Solution Approach 1:
The patent implements preliminary transmission of system information blocks at reduced power levels to terminal devices in coverage enhancement areas. The eNodeB identifies devices requiring coverage enhancement and transmits system information using optimized parameters (such as repeated transmissions at lower power or enhanced modulation) tailored to the device's location and capability, thereby extending coverage without proportionally increasing energy consumption.
Solution Approach 2:
The patent dynamically adjusts transmission parameters including power level, modulation scheme, and transmission timing based on terminal device capability and coverage requirements. For devices in coverage enhancement areas, the network modifies these parameters to achieve reliable reception with lower power consumption than conventional full-power repeated transmissions, balancing coverage extension with energy efficiency.
Data Source
AI summary
A method of operating a terminal device in a wireless telecommunications network is described. The method comprised; receiving a system information block containing a list of a plurality of different values of a parameter used in the wireless telecommunication network; determining one or more parameter values in the list which is supported within the terminal device; and receiving a system information block associated with the one or more supported parameter values from one or more other system information blocks associated with non-supported parameter values.