Methods and systems for unvarnished transmission of CBR signals in packet switching system
A technology of packet switching and signaling, applied in the field of communication, which can solve the problem of unfixed transmission delay of service signal B
Active Publication Date: 2021-01-01
ZTE CORP
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Problems solved by technology
If the CBR signal implements cross-scheduling through the packet switching system, the CBR signal is equivalent to the client signal A, and the packet signal is equivalent to the service signal B, but the transmission delay of the service signal B in the initial scene is fixed, but the service signal in the packet switching system B's transmission delay is not fixed
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[0017] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0018] In the communication equipment, the basic principle of the rate transparent transmission of the client signal is as follows: First, a cycle T is generated by the rate of the service signal, and T is a fixed value. For example, the time taken to send M bits by the service signal is used as T, and T is the cycle Sexuality, that is, T cycles occur continuously, and the duration of each T cycle is equal. Calculate the bit number N of the client signal in each T cycle, N may be in bit or Kbit, and K is an integer. Pass N through the overhead, the sink gets T, and then gets N, then the rate of the client signal can be recovered according to T and N. In the above application scenarios, the service signal is generally transmitted in the optical fiber, the service signal has a fixed rate, and the delay of the optical fiber transmission signal is fixed, ...
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The invention provides a method and system for unvarnished transmission of CBR signals in a packet switching system, and the method comprises the steps: receiving, by a source end of a packet signal,a CBR signal transmitted by first equipment, converting the CBR signal into a fixed-length packet signal, and obtaining the data volume N corresponding to the CBR signal in a preset time length T; then sending the fixed-length packet signal, T and N to a packet switching system; receiving, by the packet switching system, the fixed-length packet signal, the T and the N, and forwarding the fixed-length packet signal, the T and the N to a destination end of the packet signal after switching processing; and receiving, by the destination end of the packet signal, the fixed-length packet signal, T and N sent by the packet switching system, recovering the data of the CBR signal from the fixed-length packet signal, recovering the rate of the CBR signal according to the T and N, and sending the obtained CBR signal to second equipment.
Description
technical field [0001] The present invention relates to communication technology, for example, to a method and system for transparently transmitting CBR signals in a packet switching system. Background technique [0002] A constant bit rate (Constant Bit Rate, CBR) signal refers to a signal with a fixed rate. The signals that can be directly transmitted on the physical medium in the communication system are all fixed rate signals, such as Ethernet physical layer signals, Synchronous Digital Hierarchy (Synchronous Digital Hierarchy) , SDH) signal, Optical Transport Network (Optical Transport Network, OTN) signal, etc., in this application, the fixed rate signal is referred to as CBR signal for short. [0003] In a communication device, it is often necessary to load the signal A into the payload of the signal B, and realize the transmission and management of the signal A by transmitting the signal B. Both signal A and signal B are fixed-rate signals. Generally, signal A is ca...
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IPC IPC(8): H04L12/815H04L47/22
CPCH04L47/225
Inventor 苑岩
Owner ZTE CORP