Wireless Backhaul Paging via Mobile Termination Interception
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Solution Overview
Problem
Wireless backhaul networks in wireless communications systems face inefficiencies in paging procedures, leading to increased resource consumption and latency due to the use of wireless backhaul links for transmitting paging requests between IAB donor nodes and IAB nodes, which can result in UEs not receiving paging messages when they are outside the coverage area of the transmitting node.
Innovation Solution
Implementing a mobile termination unit (MT) in wireless nodes to detect and intercept paging messages from distributed units, allowing the MT to retransmit or transmit new paging messages to ensure that UEs receive the messages, thereby reducing the need for additional paging requests and minimizing resource consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless backhaul links are used to transmit paging requests between IAB donor nodes and IAB nodes, then the network can support integrated access and backhaul functionality, but resource consumption increases and latency increases
Solution Approach 1:
The patent extracts the paging message transmission function from the wireless backhaul link and implements it directly through the distributed unit's own transmitter. The DU can now send paging messages directly to UEs without requiring the paging request to traverse the wireless backhaul link between donor node and relay node, thereby eliminating the resource consumption associated with backhaul paging transmissions while preserving IAB functionality.
2Adaptability or versatility
If wireless backhaul links are used to transmit paging requests, then IAB networks can be established, but paging latency increases
Solution Approach 1:
The patent enables the distributed unit to have direct paging transmission capability, allowing it to immediately send paging messages to UEs in its coverage area without waiting for backhaul transmission. This preliminary preparation of direct transmission capability eliminates the time delay associated with wireless backhaul paging requests while maintaining IAB network structure.
3Device complexity
If paging messages are transmitted only through the transmitting node's coverage area, then transmission complexity is reduced, but UEs outside coverage area cannot receive paging messages
Solution Approach 1:
The patent makes the distributed unit multi-functional by enabling it to both receive paging requests and directly transmit paging messages. This universal capability allows the DU to serve UEs in its own coverage area independently, ensuring that paging messages can be delivered to UEs regardless of whether they are in the donor node's or relay node's coverage area, thereby improving paging delivery reliability without significantly increasing complexity.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first wireless node may receive, at a mobile termination unit of the first wireless node, an indication of transmission of a first paging message to a second wireless node by a third wireless node. The indication may be received from a distributed unit of the third wireless node. A distributed unit of the first wireless node may transmit, based on receive the indication of transmission of the first paging message, a second paging message to the second wireless node. Receiving the indication of the first paging message may include receiving, by the mobile termination unit of the first wireless node, the first paging message that is transmitted to the second wireless node.