Carrier Mapping for Narrowband Access to LTE Radio Nodes
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Solution Overview
Problem
Existing LTE systems limit access to radio network nodes to user equipment with transmission bandwidths that exactly match pre-determined bandwidths, preventing devices with narrower bandwidths from accessing carriers.
Innovation Solution
A wireless device and radio network node implement a mapping scheme that adapts enumerable elements to frequency ranges based on carrier information, allowing devices with narrower bandwidths to access carriers with broader bandwidths by mapping elements to frequency ranges centered at the carrier's center frequency, alternatingly towards higher and lower frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LTE systems use pre-determined transmission bandwidths for carrier access, then specification compliance is improved, but device accessibility is worsened
Solution Approach 1:
The patent changes the parameter of transmission bandwidth from fixed pre-determined values to flexible bandwidths that can be dynamically configured. The system allows a wireless device with a first transmission bandwidth to access a carrier with a second transmission bandwidth by determining a mapping scheme that maps enumerable elements to frequency ranges, thereby enabling bandwidth flexibility while maintaining specification compliance
Solution Approach 2:
The patent introduces dynamic bandwidth configuration where the transmission bandwidth is no longer static but can be adjusted based on device capabilities and carrier requirements. The mapping scheme dynamically adapts the relationship between enumerable elements and frequency ranges, allowing the system to flexibly accommodate different bandwidth configurations
2Device complexity
If LTE systems restrict access to matching bandwidths only, then system simplicity is improved, but number of connected devices is worsened
Solution Approach 1:
The patent introduces a mapping scheme as an intermediary mechanism that mediates between the wireless device's first transmission bandwidth and the carrier's second transmission bandwidth. This mapping scheme translates and reconciles the different bandwidth configurations, enabling devices with non-matching bandwidths to access carriers without complicating the overall system architecture
Solution Approach 2:
The patent makes the system universal by enabling any wireless device with any supported transmission bandwidth to access carriers with different bandwidths. The mapping scheme provides multi-functionality by handling various bandwidth combinations and device types through a single unified mechanism, thereby increasing the number of connected devices
Data Source
AI summary
A wireless device (120) and a method for enabling access to a radio network node (110) as well as a radio network node (110) and a method for enabling the wireless device (120) to enable access to the radio network node (110) are disclosed. The wireless device (120) supports a first transmission bandwidth. The radio network node (110) operates a carrier on a second transmission bandwidth. The first transmission bandwidth is narrower than the second transmission band width. The wireless device (120) obtains (202) information about the carrier. The wireless device (120) determines (206) a mapping scheme for mapping a set of enumerable elements, e.g. resource blocks or sequence elements, to frequency ranges based on the information about the carrier.