LPP Message Compatibility Level Negotiation for Wireless Positioning
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Solution Overview
Problem
Existing wireless network technologies face challenges in supporting positioning for terminals with different capabilities, as they operate with various versions of positioning protocols, leading to compatibility issues and inefficient communication.
Innovation Solution
The implementation of a message structure that includes a protocol version and compatibility level, allowing for the transmission and reception of messages that adapt to different protocol versions, ensuring interoperability between terminals and network servers, even if they support different versions of the LTE Positioning Protocol (LPP) or its extensions (LPPe).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals use different versions of positioning protocols, then positioning functionality can be supported for diverse terminal capabilities, but compatibility issues arise and communication efficiency deteriorates
Solution Approach 1:
A compatibility level field is introduced as an intermediary element in the LPP message structure. This field acts as a mediator between terminals with different protocol versions, enabling them to understand each other by negotiating compatibility levels. The compatibility level field serves as a common ground that allows terminals to identify mutually supported protocol versions without requiring exact version matching.
Solution Approach 2:
The protocol version parameter is extended by adding a compatibility level field, transforming it from a simple version identifier to a multi-dimensional parameter that includes both version number and compatibility information. This parameter change allows the system to represent multiple protocol version combinations in a structured way, enabling terminals to select appropriate protocol versions based on their capabilities while maintaining compatibility.
2Adaptability or versatility
If protocol versions are differentiated without compatibility information, then version-specific functionality is enabled, but communication efficiency and interoperability decrease
Solution Approach 1:
Compatibility level information is exchanged preliminarily during the capability negotiation phase before actual positioning measurements begin. By establishing the compatibility level in advance, terminals can optimize their communication protocols for the specific interaction, avoiding unnecessary retransmissions and ensuring efficient data exchange throughout the positioning procedure.
Solution Approach 2:
The receiving terminal provides feedback about its supported compatibility levels in response to capability requests. This feedback mechanism enables the initiating terminal to adapt its protocol version selection based on the response, creating an efficient negotiation process that optimizes communication between terminals with different capabilities.
Data Source
AI summary
Techniques for supporting positioning for terminals in a wireless network are described. In an aspect, a message is prepared and transmitted with a message segment including a version of a protocol used to encode the message and a compatibility level associated with inter-operable protocol versions, wherein different compatibility levels indicate non-compatibility between protocol versions. In another aspect, a message is received with a message segment including a version of a protocol used to encode the message and a compatibility level associated with inter-operable protocol versions, wherein different compatibility levels indicate non-compatibility between protocol versions. The compatibility level included in the received message is compared to an internal compatibility level and a response message is prepared and transmitted with a message segment including the internal compatibility level.