CN104158822A - Point-to-point transmission system of optical fiber links based on dual-channel binding and transmission method - Google Patents
Point-to-point transmission system of optical fiber links based on dual-channel binding and transmission method Download PDFInfo
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- CN104158822A CN104158822A CN201410437687.5A CN201410437687A CN104158822A CN 104158822 A CN104158822 A CN 104158822A CN 201410437687 A CN201410437687 A CN 201410437687A CN 104158822 A CN104158822 A CN 104158822A
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Abstract
The invention discloses a point-to-point transmission system of optical fiber links based on dual-channel binding. The point-to-point transmission system comprises a dual-channel binding control module, a synchronous cache module, a bit width conversion module and a word aligning module, wherein 4-byte data to be transmitted are split to single bytes to be respectively transmitted on two optical fiber links; the single byte data on the different optical fiber links firstly enter into a synchronous cache region in a receiving process. A configured binding controller adjusts a read address of the synchronous cache region of the optical fiber links through a link delay detection module, so that synchronous acquisition of bytes on the two links is guaranteed. The synchronized data are recombined to 4 bytes and are received, and lastly, the effective data content is reduced through the word aligning module. According to the point-to-point transmission system of the optical fiber links based on the dual-channel binding and the transmission method, limited hardware resources are utilized to improve the system communication bandwidth quickly and reduce the development cost effectively.
Description
Technical field
The present invention relates in optical-fibre channel (Fiber Channel) network communicating system, for utilizing passage binding technology to improve the method for system communication bandwidth in point-to-point communication between avionic device and aviation electronics digital video bus transfer.
Background technology
Under avionics development, the anonymous messaging protocol (FC-AE) of aviation and optical-fibre channel audio video transmission agreement (FC-AV) based on optical-fibre channel (FC) technology have obtained application and development.Fig. 1 has shown the application of fiber buss in Airborne Video System subsystem.
In modern advanced avionics system, the resolution to displays such as seat of honour cabins, refresh rate and definition etc. require very high, and this just directly sharply increases the demand of the communication bandwidth between each equipment in system.And the traditional fiber channel network communication technology is the transport communication protocol of single-link, improve the cost that single FC link transmission speed increases system bandwidth very high, whole communication system needs to redesign, and the construction cycle is long.And the high speed optoelectronic modular converter of production domesticization has the factors such as technology maturity is low, unstable cannot be applied in airborne avionics system.
Summary of the invention
For the deficiencies in the prior art, goal of the invention of the present invention is to provide a kind of optical fiber link point-to-point transmission system based on binary channels binding, by adopting passage binding technology to improve optical fiber telecommunications system data throughout, effectively solve the system bottleneck causing in communication process, in Quick high bandwidth simultaneously, without changing hardware, efficent use of resources has also reduced development cost.
Goal of the invention of the present invention is achieved through the following technical solutions:
A kind of optical fiber link point-to-point transmission system based on binary channels binding, comprise binary channels binding control module, synchronization caching module, bit width conversion module and word alignment module, it is characterized in that described binary channels binding control module is for being configured to binary channels primary link, from link, by sending into respectively the laggard row of master and slave link through the data that split, transmit, and the data that read in synchronization caching module according to the delay of each link on master and slave link when data receiver are sent into bit width conversion module;
The data flow from each high-speed serial receiver that described synchronization caching module receives for buffer memory is carried out buffer memory according to master and slave link;
Described bit width conversion module is used for, when sending, 4 byte datas are split into byte data, and becomes 4 bytes to send into word alignment module the data transaction after synchronous when receiving;
Described word alignment module is for restoring active data after 4 byte data alignment.
According to above-mentioned feature, described binary channels binding control module comprises passage binding configuration module, link delay detection module and read pointer control module;
Described passage binding configuration module is for determining master and slave link;
Described link delay detection module starts link delay counter according to the special word in master and slave link, determines the delay on master and slave link;
Read pointer control module be take primary link data as reference, according to delay count value, comes to adjust forward, backward the address of reading from link data buffer memory, completes synchronously obtaining of master and slave link data buffer memory.
According to above-mentioned feature, in described synchronization caching module, the data of buffer memory are divided into master and slave special sign knowledge buffer memory and master and slave data buffer storage.
According to above-mentioned feature, described optical fiber link point-to-point transmission system also comprises clock configuration module, clock configuration module carries out frequency multiplication configuration by outside phase-locked loop to user clock, select adjacent two-way high-speed transceiver as with reference to clock, output clock is 2 times of input clock, by synchronization caching module and bit width conversion module, the work clock of final 4 bytes is output clock.
The transmission method that another object of the present invention is to provide a kind of optical fiber link point-to-point transmission system based on binary channels binding, comprises following steps:
Before step 1, link work, dual link is configured to master and slave pattern, one of them link is primary link, from link, will take primary link as according to being configured;
Step 2,4 byte datas that sending module is sent split into byte data inputs primary link, from link, carry out respectively 8b/10b coding and be incorporated to go here and there out after conversion transmitting by high speed serialization transmitter;
Step 3, receive after the data flow from each high-speed serial receiver, first by going here and there and changing, after special word detection and alignment and 10b/8b decoding, according to master and slave link, write synchronization caching module;
Step 4, first read primary link address, then according to link delay, control is adjusted in the address of reading from link, be reassembled into the data of 4 bytes after synchronous, finally carry out byte-aligned.
According to above-mentioned feature, data resolution method is: 4 byte datas are carried out to left and right and split, be divided into strange, even two double bytes, then be divided into high and low byte, high byte is write to primary link, low byte writes from link.
Compared with prior art, beneficial effect of the present invention is: the present invention is following fibre channel communication agreement (FC-FS-2) simultaneously, designed by the transfer of data on single fiber link the implementation method of utilizing passage binding technology to communicate on two optical fiber links.The two optical fiber links that use 2.125Gbps transmission rate, system transmission bandwidth is brought up to 400MB/s from single-link 200MB/s.And this system can be applied to the anonymous messaging protocol (FC-AE) of aviation and the optical-fibre channel audio video transmission agreement (FC-AV) of optical-fibre channel (FC) technology simultaneously, and need not change system input control file (ICD), in the time of fast lifting systematic function, reduce system development costs.Can improve rapidly the transmission bandwidth of aviation electronics optical fiber link point-to-point communication and aviation electronics digital video bus.The link fictionalizing by the mode bundling and the design of former single-link MAC layer are completely compatible, have reduced system development costs and R&D cycle.The design of this patent can be applied to a plurality of development platforms simultaneously, and applicability is strong, has significant economic benefit and application prospect.
Accompanying drawing explanation
Fig. 1 is Airborne Video System system;
Fig. 2 is systematic schematic diagram of the present invention;
Fig. 3 is hardware configuration schematic diagram of the present invention;
Fig. 4 is the structural representation of clock configuration module in the present invention
Fig. 5 is the structural representation of binary channels binding control module in the present invention
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
The hardware configuration of a kind of optical fiber link point-to-point transmission system based on binary channels binding of the present invention as shown in Figure 3.Comprise two-way high speed serialization transceiver, binary channels binding controller, an optical fiber link controller, MAC layer controller and data send, receiver module.Because adopted passage binding technology, user oriented layer only needs a MAC layer, and passage binding controller can carry out Back end data sending and receiving reduction in dual link, can be fast and the complete compatibility of single-link MAC layer design.
If do not adopt passage binding technology to realize binary channels transmitting-receiving, each link needs a link controller and MAC layer controller, and each link safeguards respectively, and data need to be distinguished framing and transmit on each link.And because link does not carry out synchronously, the delay on transmission link can be delivered in rear module and go, and causes receiving the dislocation of data and the difference on time of reception.
Fig. 2 has provided a kind of optical fiber link point-to-point transmission system based on passage binding technology of the present invention.Two optical fiber link transmission channels are bundled, equal to have invented an optical fiber transport channel, rear end design still designs towards single fiber link module, greatly lowers system cost and R&D cycle, and well compatible with the design towards single fiber link.The present invention needs 1 clock configuration module, 1 data bit width conversion module, 1 binary channels binding control module, 1 group of synchronization caching module and 1 word alignment module.
(1) binary channels binding control module
Binary channels binding control module structure as shown in Figure 5.Passage binding control module comprises passage binding configuration module, link delay detection module and read pointer control module.Link delay detection module, according to master and slave special word (K code) indication, starts link delay counter, determines the delay on master and slave link.Read pointer control module is adjusted forward, backward the address of reading from link data buffer memory according to delay count value, completes synchronously obtaining of master and slave link data buffer memory.
(2) synchronization caching module
Synchronization caching module comprises master and slave special sign knowledge buffer memory, master and slave data buffer storage.
(3) data bit width modular converter
For 4 bytes (32-bit) data that sending module is sent, carrying out left and right splits, be divided into strange, even two double bytes (16-bit), be divided into again high and low byte (8-bit), and become 4 bytes to send into word alignment module the data transaction after binary channels binding control module is synchronous when receiving;
(4) word alignment module
Word alignment module can be according to special byte the position in 32 words, adjust backward accordingly, be combined into valid data content.
(5) clock configuration module
Clock configuration module as shown in Figure 4.The reference clock of take comes optical fiber link transfer clock as input clock, and rear end parallel clock is configured.Because each link transmission passage is 1 byte, and high-speed transceiver inside is 20-bit bit wide, so user clock is carried out to frequency multiplication configuration by outside phase-locked loop.Again in order to support dual link binding, so select adjacent two-way high-speed transceiver and homology reference clock.Output clock 2 is input clock 2 times.By (16-bit/32-bit) after bit width conversion module and synchronization caching, the work clock of final 4 bytes is output clock.
The transmission method of a kind of optical fiber link point-to-point transmission system based on passage binding technology of the present invention is as follows:
Before link work, passage binding configuration module is configured to master and slave pattern by dual link, and namely one of them link is that passage bundlees main communication link, from link, will take primary link as according to being configured.
First 4 bytes (32-bit) data of sending module being sent are carried out left and right and are split, be divided into strange, even two double bytes (16-bit), be divided into again high and low byte (8-bit), high byte is write and become owner of sendaisle, low byte writes from sendaisle, carries out respectively 8b/10b coding and be incorporated to go here and there out after conversion transmitting by high speed serialization transmitter.
Receive after the data flow from each high-speed serial receiver, first by going here and there and changing, after special word detection and alignment and 10b/8b decoding, according to master and slave passage, carry out high and low byte splicing and write synchronous reception buffer memory.From the address of reading of the synchronization caching of passage, by passage binding Configuration Control Unit, by link delay detection module, adjusted, guarantee synchronously obtaining of byte in dual link.Usually, passage binding controller is determined each link delay according to the special character code (K28.5) of transmitting continuously on master and slave link, and control is adjusted in the address of reading from link.The delay of master and slave link is only carried out before link initialization, once and no longer adjust after determining, so can not produce any impact to optical fiber link agreement.
After synchronous, be reassembled into the data of 4 bytes, send into word alignment module and carry out byte-aligned.Word alignment module can be according to special byte the position in 32 words, adjust backward accordingly, be combined into valid data content.
Claims (6)
1. the optical fiber link point-to-point transmission system based on binary channels binding, comprise binary channels binding control module, synchronization caching module, bit width conversion module and word alignment module, it is characterized in that described binary channels binding control module is for being configured to binary channels primary link, from link, by sending into respectively the laggard row of master and slave link through the data that split, transmit, and the data that read in synchronization caching module according to the delay of each link on master and slave link when data receiver are sent into bit width conversion module;
The data flow from each high-speed serial receiver that described synchronization caching module receives for buffer memory is carried out buffer memory according to master and slave link;
Described bit width conversion module is used for, when sending, 4 byte datas are split into byte data, and becomes 4 bytes to send into word alignment module the data transaction after synchronous when receiving;
Described word alignment module is for restoring active data after 4 byte data alignment.
2. a kind of optical fiber link point-to-point transmission system based on binary channels binding according to claim 1, is characterized in that binary channels binding control module comprises passage binding configuration module, link delay detection module and read pointer control module;
Described passage binding configuration module is for determining master and slave link;
Described link delay detection module starts link delay counter according to the special word in master and slave link, determines the delay on master and slave link;
Read pointer control module be take primary link data as reference, according to delay count value, comes to adjust forward, backward the address of reading from link data buffer memory, completes synchronously obtaining of master and slave link data buffer memory.
3. a kind of optical fiber link point-to-point transmission system based on binary channels binding according to claim 1, is characterized in that the data of buffer memory in described synchronization caching module are divided into master and slave special sign knowledge buffer memory and master and slave data buffer storage.
4. a kind of optical fiber link point-to-point transmission system based on binary channels binding according to claim 1, it is characterized in that described optical fiber link point-to-point transmission system also comprises clock configuration module, clock configuration module carries out frequency multiplication configuration by outside phase-locked loop to user clock, select adjacent two-way high-speed transceiver as with reference to clock, output clock is 2 times of input clock, by synchronization caching module and bit width conversion module, the work clock of final 4 bytes is output clock.
5. a kind of transmission method of the optical fiber link point-to-point transmission system based on binary channels binding according to claim 1, comprises following steps:
Before step 1, link work, dual link is configured to master and slave pattern, one of them link is primary link, from link, will take primary link as according to being configured;
Step 2,4 byte datas that sending module is sent split into byte data inputs primary link, from link, carry out respectively 8b/10b coding and be incorporated to go here and there out after conversion transmitting by high speed serialization transmitter;
Step 3, receive after the data flow from each high-speed serial receiver, first by going here and there and changing, after special word detection and alignment and 10b/8b decoding, according to master and slave link, write synchronization caching module;
Step 4, first read primary link address, then according to link delay, control is adjusted in the address of reading from link, be reassembled into the data of 4 bytes after synchronous, finally carry out byte-aligned.
6. transmission method according to claim 5, is characterized in that data resolution method is: 4 byte datas are carried out to left and right and split, be divided into strange, even two double bytes, then be divided into high and low byte, high byte is write to primary link, low byte writes from link.
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| CN113434455A (en) * | 2021-06-22 | 2021-09-24 | 中国电子科技集团公司第十四研究所 | Optical fiber interface data cache management method based on FPGA |
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