Dynamic bandwidth source allocation method and dynamic bandwidth source allocation device
A technology of dynamic bandwidth and resource allocation, applied in the field of communication, it can solve the problems of unstable ONU flow and fluctuation of Ethernet packet size, etc., and achieve the effect of reducing delay and improving efficiency.
Active Publication Date: 2015-07-22
SANECHIPS TECH CO LTD
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Although this method can guarantee the total bandwidth, and when the optical network unit (Optical Network Unit, referred to as ONU) traffic is stable, the data packet delay can also be guaranteed to be around 3ms, but when testing random packets, the ONU The traffic is extremely unstable, and the size of the Ethernet packet fluctuates greatly between 64 and 1518 bytes. At this time, the size of the Ethernet packet may be much larger than bmax, resulting in a delay of more than ten milliseconds in sending the data packet
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[0029] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.
[0030] The embodiment of the present invention provides a dynamic bandwidth resource allocation method. In this method, the problem of large data packets and small flows during data transmission, that is, when the bandwidth is not enough to transmit large data packets, data transmission delays are prone to occur For larger problems, a solution is proposed to allow a breakthrough in a certain DBA cycle, that is, to allocate resources greater than the preset rated bandwidth to the optical network unit to reduce the transmission delay.
[0031] figure 2 is a flowchart of a dynamic bandwidth resource allocation method according to an embodiment of the present invention, such as figure 2 As shown, the...
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The invention discloses a dynamic bandwidth source allocation method and a dynamic bandwidth source allocation device. The dynamic bandwidth source allocation method comprises the following steps: judging that the bandwidth needing to be allocated to an optical network unit in the current DBA period is larger than the preset rated bandwidth; and allocating the bandwidth source with the bandwidth larger than the rated bandwidth to the optical network unit. Through the invention, under the condition that the flow rate of the optical network unit (ONU) is unstable, the flow rate is enabled to trend to be stable, the sending of an Ethernet packet is delayed to the smallest extent when the Ethernet packet fluctuates in a larger range, and meanwhile, the precision of the smallest bandwidth is regulated randomly according to the requirement of a system.
Description
technical field [0001] The present invention relates to the communication field, in particular to a dynamic bandwidth resource allocation method and device. Background technique [0002] In the Gigabit Passive Optical Network (GPON) protocol, the Dynamic Bandwidth Allocation (DBA) mechanism defines five transmission containers (Transmission Containers, T- CONT) type: T-CONT type 1, type 2, type 3, type 4, type 5, see Table 1. Among them, R F is the fixed bandwidth, R A is to ensure the bandwidth, R M is the maximum bandwidth, the three always keep R M ≥R F +R A relationship, the total bandwidth of the T-CONT is often determined by the R M to limit. For any of the five T-CONT types, when the T-CONT traffic is large and the remaining bandwidth is sufficient, the allocated bandwidth is R M . [0003] [0004] Table 1 [0005] In the existing DBA system design, in order to control the total bandwidth of a certain T-CONT, it is common practice to set a maximum bandw...
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IPC IPC(8): H04L12/28H04L47/76
Inventor 金军
Owner SANECHIPS TECH CO LTD