US 11,742,972 B2
Method of guaranteeing jitter upper bound for a network without time-synchronization
Jinoo Joung, Seoul (KR)
Assigned to Sangmyung University Industry-Academy Cooperation Foundation, Seoul (KR)
Filed by Sangmyung University Industry-Academy Cooperation Foundation, Seoul (KR)
Filed on Apr. 21, 2021, as Appl. No. 17/236,168.
Claims priority of application No. 10-2021-0016065 (KR), filed on Feb. 4, 2021.
Prior Publication US 2022/0247504 A1, Aug. 4, 2022
Int. Cl. H04J 3/06 (2006.01)
CPC H04J 3/0661 (2013.01) 6 Claims
OG exemplary drawing
 
1. A method of guaranteeing a jitter upper bound for a network without time-synchronization, which guarantees a jitter upper bound for a flow that is transmitted from a source to a destination through a network,
setting a jitter upper bound to an arbitrary value,
determining buffer holding intervals,
holding, at a buffer located between the network and the destination, packets of the flow for the predetermined holding intervals,
the buffer outputting the packet of the flow, and
wherein the network guarantees a latency upper bound of the flow,
wherein the arbitrary value can be as low as 0 (zero),
wherein the packet includes a relative time-stamp in which a departure time from the source or an arrival time to the network is recorded,
wherein the buffer holding interval is determined using the relative time-stamp, and
wherein the buffer is configured to:
hold a first packet of the flow for a buffer holding interval (m−W); and
hold a nth packet of the flow until a time max {bn, C1+(an−a1)},
where an is an arrival time when the nth packet of the flow arrives at the network, a1 is an arrival time when the first packet of the flow arrives at the network, bn is a departure time when the nth packet departs from the network, c1 is a buffer-out time when the first packet departs from the buffer, U is the latency upper bound, W is a latency lower bound provided by the network, m is a buffering parameter, W≤m≤U, and n >1.