Device-to-Device Link Establishment Using Transition Gaps
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Solution Overview
Problem
In dense cellular networks, fixed parameters for the random-access channel (RACH) lead to significant network entry delays, which are unacceptable in critical services, necessitating a system and method for establishing a device-to-device communication link to facilitate faster network entry.
Innovation Solution
A system and method utilizing transmit-to-receive transition gaps (TTG) and receive-to-transmit transition gaps (RTG) in cellular networks, involving a base station, user equipment with cognitive engines, and collaborative random-access channels (CRACH) to enable device-to-device communication links, allowing for time synchronization and bandwidth allocation to reduce overlapping signals and enhance network entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed parameters for random-access channel (RACH) are used during base station configuration, then network deployment is simplified, but network entry delays increase significantly in dense cellular networks
Solution Approach 1:
The patent transforms the static, fixed RACH parameters into dynamic parameters that can be adjusted in real-time. The base station determines RACH parameters dynamically based on current network conditions, user equipment characteristics, and traffic patterns, allowing the system to adapt to dense network environments and reduce entry delays while maintaining configuration flexibility.
Solution Approach 2:
The invention changes the RACH parameters from fixed values to variable parameters that can be modified based on network conditions. The base station selects from multiple possible parameter values (such as different RACH occasion configurations, preamble formats, and timing advance values) to optimize network entry performance in dense deployments.
2Quantity of substance
If more user equipment is served by the base station in dense networks, then network coverage and capacity increase, but signal overlapping at transition gaps increases
Solution Approach 1:
The patent segments the uplink and downlink transmission intervals into distinct time slots with guard periods (TTG and RTG) between them. By dividing the transmission timeline into separate segments for uplink and downlink with transition gaps in between, the system prevents signal overlapping while accommodating multiple user equipment, thereby increasing capacity without causing interference.
Solution Approach 2:
The invention implements periodic transmission intervals with regular patterns of uplink and downlink slots separated by transition gaps. This periodic structure ensures that signals from multiple user equipment are transmitted in organized time slots, preventing overlapping while maintaining high user capacity in dense networks.
3Speed
If device to device communication links are established using transition gaps, then network entry speed increases, but timing synchronization requirements become more stringent
Solution Approach 1:
The patent performs timing synchronization and parameter configuration in advance before actual data transmission begins. The base station pre-configures the transition gap parameters, timing advance values, and synchronization signals, allowing user equipment to quickly establish device-to-device communication links without requiring complex real-time synchronization, thus achieving fast network entry.
Data Source
AI summary
Disclosed is a system and method for establishing a device to device communication link in cellular networks. The system includes one or more user equipments, and a base station. The one or more user equipments includes a first user equipment and a second user equipment. The first user equipment is configured with a first user equipment cognitive engine and the second user equipment is configured with a second user equipment engine. The base station that is coupled to a cellular tower and configured with an evolved packet core EPC. The base station and at least one of the one or more user equipments performs a method for establishing the device to device communication link in the cellular network using a transmit to receive transition gap (TTG) and a receive to transmit transition gap (RTG).