Paging Allocation Message Repetition Levels for MTC Coverage
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Solution Overview
Problem
Current mobile telecommunication systems face challenges in efficiently paging low-complexity Machine-Type Communication (MTC) devices due to high repetition levels required for coverage extension, which increase power consumption and delay message transmission.
Innovation Solution
The method involves transmitting paging allocation messages at different repetition levels, allowing terminals to decode messages earlier and reduce power consumption by starting paging message transmission based on the lowest repetition level, thereby reducing the time and power required to receive paging information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If high repetition levels are used for coverage extension, then coverage area is improved, but power consumption increases and message transmission delay increases
Solution Approach 1:
The paging message is segmented into multiple repetition levels (first repetition level with N1 repetitions, second repetition level with N2 repetitions where N2 > N1). Terminals can select the appropriate repetition level based on their coverage conditions, allowing devices in good coverage to use fewer repetitions and save power, while devices in poor coverage can use more repetitions for reliable reception.
Solution Approach 2:
The system dynamically adapts the repetition level based on terminal-specific coverage conditions. Each terminal can determine its own coverage status and select the appropriate repetition level (N1 or N2), making the power consumption and transmission delay dynamic rather than fixed for all terminals.
2Area of stationary object
If high repetition levels are used for coverage extension, then coverage area is improved, but message transmission delay increases
Solution Approach 1:
The paging message transmission is segmented into multiple repetition levels with different repetition counts (N1 and N2). By transmitting at both levels simultaneously or in parallel, the system enables terminals to receive the message at the earliest possible moment based on their coverage conditions, reducing overall transmission delay.
Solution Approach 2:
The system prepares and transmits paging messages at multiple repetition levels in advance. Terminals can immediately decode the message at the appropriate repetition level without waiting for sequential transmissions, eliminating delays associated with retry mechanisms.
3Device complexity
If simple and inexpensive terminals are used for MTC, then device complexity is reduced, but ability to decode paging messages at high repetition levels deteriorates
Solution Approach 1:
The paging message transmission is divided into multiple repetition levels. Simple terminals can successfully decode messages at the first repetition level (N1 repetitions) which requires less complex processing, while still providing an option for higher repetition levels (N2) for terminals in poor coverage. This segmentation allows low-complexity terminals to operate reliably without requiring full capability for high-repetition decoding.
Solution Approach 2:
The system changes the repetition parameter (N1 vs N2) to match terminal capabilities and coverage conditions. By offering multiple repetition level options, the system adapts to the constraints of simple terminals while maintaining reliability for terminals that require higher repetition counts for coverage extension.
Data Source
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AI summary
A method of transmitting paging information to a terminal in a telecommunications system via a wireless interface,wherein the terminal is operable to decode received messages that are transmitted at a first repetition level or at a second repetition level, wherein a message transmitted at the first repetition level is being repeated a number N1 of times and a message transmitted at the second repetition level is being repeated a number N2 of times, with N1<N2. The method comprises transmitting a first paging allocation message to the terminal in a downlink search resources space and at the first repetition level; and transmitting a second paging allocation message to the terminal in a downlink search resources space and at the second repetition level.