MBMS UE Counting via Preamble Sequence Detection
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Solution Overview
Problem
Conventional 3GPP wireless communication systems face inefficiencies in counting user equipment (UE) using multimedia broadcasting and multicast services (MBMS), as they lack a clear method to differentiate between MBMS and non-MBMS counting processes, leading to increased complexity and signaling overhead.
Innovation Solution
A wireless communication system and method that utilize a preamble with sequence setting information to detect whether a UE is using MBMS, allowing for separate counting processes based on detected sequences, thereby simplifying the access probability management and reducing signaling complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the CRNC sets the access probability factor high to generate collision between UEs that attempt random access, then the counting process can acquire collision information, but the counting process consumes a much longer time than normal random access
Solution Approach 1:
The patent segments the random access preamble into multiple parts, including a signature sequence and a gold sequence. The signature sequence is used for initial detection while the gold sequence provides additional information for accurate MBMS counting. This segmentation allows the system to achieve accurate counting without requiring high collision probability, thus reducing the time consumption.
Solution Approach 2:
The patent applies preliminary action by having UEs pre-configure their access probability factors based on stored information about MBMS service interest. This allows UEs to make informed access decisions before attempting random access, reducing unnecessary collisions and the time needed for accurate counting without requiring the CRNC to set high access probability factors.
2Object-generated harmful factors
If the CRNC sets the access probability factor low in a situation that few UEs attempt the random access, then collision is minimized, but the counting process consumes a much longer time than normal random access
Solution Approach 1:
The patent segments the preamble structure to include specific fields that indicate MBMS service interest. This segmentation enables the CRNC to identify MBMS-interested UEs through their preambles without requiring high collision probability, thus achieving accurate counting with low access probability factors and minimizing both collision and time consumption.
Solution Approach 2:
The patent introduces an intermediary mechanism where the preamble structure itself carries information about MBMS service interest. This intermediary allows the CRNC to distinguish MBMS UEs from non-MBMS UEs without relying on high collision probability or extensive signaling, thereby reducing both collision and counting process time.
3Productivity
If the conventional counting process is used without MBMS-specific preamble detection, then the system can count all UEs, but it cannot differentiate between MBMS and non-MBMS counting processes
Solution Approach 1:
The patent segments the preamble into distinct components, with the gold sequence specifically designed to carry MBMS service interest information. This segmentation enables the CRNC to detect and differentiate MBMS UEs from non-MBMS UEs by examining the gold sequence, thereby improving counting efficiency for MBMS services without significantly increasing overall system complexity.
Solution Approach 2:
The patent makes the preamble structure universal by using the same basic format for all UEs, but incorporating MBMS-specific information in the gold sequence. This multi-functionality allows the same preamble structure to serve both general random access purposes and MBMS-specific counting purposes, improving efficiency without adding separate complex mechanisms.
Data Source
AI summary
The embodiments relate to a wireless communication system that counts UEs using an MBMS. The wireless communication system is connected with a UE through a radio link, and includes a Node B and a controlling radio network controller (CRNC). The Node B receives sequence setting information on a sequence included in a preamble transmitted from the UE network manager. The CRNC controls the Node B, detects a sequence according to whether to use an MBMS based on the sequence setting information, and performs a counting process for counting UEs based on whether the UE uses the MBMS.According to the embodiments, counting of UEs using an MBMS can be performed by using a predetermined sequence. Particularly, the counting process can be simplified by reducing complexity in access probability management of a network manager, thereby increasing efficiency in data transmission by reducing signaling for random access probability and omitting a random access probability calculation process.