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Detection method and apparatus

A detection method and transmission direction technology, applied in the field of communication, can solve problems such as network quality degradation, collision, undetectable packet sending, etc., to achieve the effect of reducing maintenance costs and ensuring network quality

Active Publication Date: 2016-06-01
RAISECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the IEEEEP1901 / HOMEPLUGAVMAC layer is based on the CMSA / CA (CarrierSenseMultipleAccesswithCollisionAvoidance, Carrier Sense Multiple Access with Collision Avoidance) mechanism, in some cases the excessive isolation between CNUs will make it impossible for CNUs to detect whether other CNUs in the network are sending packets , resulting in a significant increase in the probability of uplink packets colliding at the physical layer, and a significant decrease in network quality
like figure 2 As shown in the scenario in which CNUs located in different buildings are connected to one CBAT, the isolation between the CNUs in group 1 and the CNUs in group 2 exceeds 100dB, and the two cannot detect that each other is sending packets, and they hide each other. node, in this case, the above-mentioned collision problem will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Such as image 3 As shown, the present embodiment provides a detection method, the method comprising:

[0064] Step S11: the EoC central office equipment CBAT in the coaxial cable access technology network EoC calculates the media access control protocol data unit MPDU ( MACProtocolDataUnit) conflict rate;

[0065] Step S12: When the MPDU collision rate reaches a predetermined condition, the CBAT judges whether the CNU is a problem terminal according to the second message information reported by the CNU;

[0066] Among them, the problem terminal is the terminal with hidden nodes. In the embodiment of the present invention, a node is a terminal.

[0067] In the above technical solution, CBAT judges whether there is a possibility of a problematic terminal in the network according to the first message information reported by each CNU. If there is a possibility of a problematic terminal, then further obtains the second message information reported by the CNU. The identi...

Embodiment 2

[0100] The technical solutions of the present invention are further described below in conjunction with specific scenarios. The detection method provided in this embodiment is applied to an EoC network composed of a CBAT and multiple CNUs connected to the CBAT. The method is executed by the CBAT and can be implemented by software and / or hardware. CBAT manages each CNU connected to it. The MAC layer working mode of each CNU defaults to CMSA / CA mode in the initial state.

[0101] Step 1: The CBAT periodically sends a request for obtaining link information management messages to all online CNUs (for example, sends the request to all online CNUs every ten minutes), and receives the first message returned by the online CNUs according to the request.

[0102] Wherein, the management message is an Ethernet frame whose Ethernet type is 0x88e1, and the frame format is shown in Table 1:

[0103]

[0104]

[0105] Table 1

[0106] Step 2: The CBAT analyzes the first message repl...

Embodiment 3

[0132] Such as Figure 5 As shown, the present embodiment provides a detection device, which is arranged in the EoC central office equipment CBAT in the coaxial cable access technology network EoC, and the device includes:

[0133] The processing module 11 calculates the media access control protocol data unit MPDU collision rate of the CNU in the uplink data sending direction according to the first message information reported by the EoC terminal equipment CNU;

[0134] A judging module 12, configured to judge whether the CNU is a problem terminal according to the second message information reported by the CNU when the MPDU collision rate reaches a predetermined condition;

[0135] Among them, the problem terminal is the terminal with hidden nodes.

[0136] Optionally, the processing module is used to calculate the MPDU collision rate of the CNU in the uplink data sending direction according to the first message information reported by the CNU specifically refers to:

[013...

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Abstract

Provided in the invention is a detection method. The method comprises: A coaxial broadband access terminal (CBAT) in an etehrnet over coaxial cable (EoC) network calculates an MAC protocol data unit (MPDU) collision rate of a coaxial network unit (CNU) at an uplink data sending direction according to first message information reported by the CBAT CNU; when the MPDU collision rate reaches a predetermined condition, the CBAT determines whether the CNU is a problem terminal based on second message information reported by the CNU, wherein the problem terminal is a terminal with a hidden node. According to the technical scheme, a problem terminal in an EoC network can be found effectively and the working mode of the MAC layer can be adjusted to an optimal one according to the number of problems terminals, so that the network quality is guaranteed and the network operation and maintenance costs are lowered.

Description

technical field [0001] The invention relates to the communication field, in particular to a detection method and device. Background technique [0002] EoC (Ethernet over Coaxial Cable, coaxial cable access technology) is an access technology based on the cable TV coaxial cable network using the Ethernet protocol. (EoC) Demand White Paper" shall prevail. The basic principle of EoC is to use a specific media conversion technology to transmit data signals conforming to the 802.3 series of standards through the home coaxial cable. This technology can make full use of the existing home-entry coaxial cable resources of the cable television network, and solve the access problem of the last 100m. Based on the consideration of anti-interference ability and the difficulty of transformation, the active EoC technology solution based on IEEEEP1901 / HomePlugAV is mainly used in the two-way transformation process of my country's HFC (Hybrid Fiber Coaxial Cable Network) network. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/26
CPCH04L41/06H04L43/08
Inventor 莫怡欣
Owner RAISECOM TECH