CN103916160A - UWB MAC layer circuit supporting point-to-point communication - Google Patents
UWB MAC layer circuit supporting point-to-point communication Download PDFInfo
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- CN103916160A CN103916160A CN201210595899.7A CN201210595899A CN103916160A CN 103916160 A CN103916160 A CN 103916160A CN 201210595899 A CN201210595899 A CN 201210595899A CN 103916160 A CN103916160 A CN 103916160A
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Abstract
The invention provides a UWB MAC layer circuit supporting point-to-point communication. The MAC layer circuit capable of finishing point-to-point data transmission conveniently and independent of specific applications is provided based on ECMA368MAC protocol standard and the requirements of point-to-point communication. By utilizing the structure, only a specific interface circuit matched with a wired connection port needs to be designed in the specific application, and thus point-to-point connection of two peer wired devices can be finished, thereby realizing wireless information transmission with the minimum cost, and reducing the cost of a chip.
Description
Technical field
The present invention relates to MAC layer circuit design method and the implementation structure of the definition of ECMA368 protocol specification.
Background technology
Ultra wideband transmissions technology is a broadband wireless transmission technology with stronger vitality, than other broadband technologys, ultra broadband has lower sending power consumption and high receiving sensitivity, and can be good at meeting family etc. has the local area radio application scenario of high requirements to bandwidth.Meanwhile, because lower transmitting power consumption profile is on a very wide frequency band, there is less impact to wireless channel in this wireless device, is convenient to other radio coexistences and non-interference.
Along with the continuous expansion of market application, the application of ultra broadband is multifarious, and from ECMA368 agreement is formulated, various standard compliant product form emerge in an endless stream.Wherein a kind of application is for point to point link, by traditional process wired connection, changes into and uses super wideband wireless to connect, and completes the transmission of information.The present invention, just for this application, proposes a kind of MAC layer circuit, completes the wireless penetration of point to point link.
This structure is easy to realize, can easily wire signal transformat be converted into transmission of wireless signals form, and complete transmission by means of wireless channel, and MAC circuit does not participate in the analyzing device interface bag content that transmits and receive data, avoid software participation, simplify application, realized smoothly information transparent transmission.
Summary of the invention
The present invention proposes a kind of UWB MAC layer circuit of support point point to-point communication, this circuit is by two buffer memorys (UWB_TXBUF and UWB_RXBUF) and caching control unit (BUF CTRL) that structure is identical, complete the transmitted in both directions of data between wired interface unit (DEVICE IF) and MAC Control Element (MAC CTRL), and then by traditional wired connection point-to-point communication, be converted into the wireless point-to-point communication of UWB.
The UWB MAC layer circuit of a kind of support point point to-point communication disclosed by the invention, it is characterized in that comprising transmission buffer memory, receive buffer memory, caching control unit, wired interface unit and MAC Control Element, by sending buffer memory and receiving buffer memory and caching control unit, complete the transmitted in both directions of data between wired interface unit and MAC Control Element; Wherein:
MAC Control Element: coordinate base band and radio frequency jointly to complete point to point wireless communication, sending in data path the data stuffing in transmission buffer memory to media access control layer MAC Frame and be sent to base band; In reception data path, base band data is deposited to receiving buffer memory;
Caching control unit: complete the data buffer storage control that sends data path and receive data path;
Send buffer memory: be used for storing the data that wired interface unit receives, and be sent to base band as the MAC Frame of media access control layer;
Receive buffer memory: be used for the MAC Frame that medium access control layer receives, and be sent to wireline interface end by wired interface unit;
Wireline interface processing unit: receive packet from direct connected network interface card, deposit to sending in buffer memory; On the other hand, from receive buffer memory, obtain packet, send it to connected wireline interface end;
Sending in data path, by wired interface unit, Ethernet data bag is deposited to sending buffer memory; MAC Control Element is by data stuffing MAC Frame in transmission buffer memory and be sent to base band; In reception data path, MAC Control Element deposits base band data to receiving buffer memory; Wired interface unit will receive in buffer memory data upload to wireline interface end.
MAC Control Element does not make any parsing and amendment to data in data transmission procedure, transmit but directly set it as payload, therefore communicating pair be it seems, send and receive data are without any change, and during with wired connection, the data of sending and receiving are in full accord.It should be noted that than direct wired connection, under this communication mode there is certain time delay (comprising data buffer storage time delay and wireless channel time delay) in both sides in the time receiving the other side's data.This structure has realized the transparent transmission of point-to-point information, and chip structure has more versatility, has simplified system design and application, is easy to expansion and supports dissimilar wireline interface, completes the wireless penetration of communication.
In addition, in circuit, to uplink and downlink data path independent process, when supporting uplink and downlink data path, access, thus the full-duplex operation of supporting interface unit, the throughput of raising system.
Brief description of the drawings
The wireless penetration schematic diagram of Fig. 1 Ethernet card point-to-point communication.
Fig. 2 UWB MAC circuit diagram.
Fig. 3 UWB MAC data penetration transmission schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, taking the ethernet communication link of point to point connect as example, illustrate the present invention.
Use communication structure schematic diagram that this circuit realizes point-to-point ethernet communication as shown in Figure 1, Device1 and Device2 with RJ45 interface complete point-to-point communication by UWB subsystem, its effect is equivalent to use netting twine that the two is directly connected shown in dotted line, and wherein UWB MAC main circuit will be responsible for data retransmission.
In order to realize this purpose, design UWB MAC circuit as shown in Figure 2,
Whole circuit has two place's interfaces, and the wireline interface of place's Ethernet is connected, and a place is connected with RF with the BB of UWB.
At MAC inside circuit downstream data flow as shown in figure red line;
1.. by DEVICEIF, Ethernet data bag is deposited to sending buffer memory;
2. fill using data in transmission buffer memory as payload with MAC Frame by MAC CTRL and be sent to base band (BB);
At MAC inside circuit upstream as shown in the figure;
3. by MAC CTRL, the part of the payload of base band (BB) data is deposited to receiving buffer memory;
4. will receive in buffer memory data upload to DEVICE by DEVICE IF.
Each several part is described as follows:
MAC CTRL:MAC control unit, realizes the protocol-dependent MAC of ECMA368 and controls, and coordinates BB and RF jointly to complete point to point wireless communication.
BUF CTRL: uplink and downlink caching control unit, completes respectively the control of uplink and downlink data buffer storage.
UWB TXBUF:UWB MAC layer sends buffer memory, is used for storing the data (packet of data shown in Fig. 3) that DEVICEIF receives, and is sent to base band as the payload of MAC.Can change according to actual needs its size.
UWB RXBUF:UWB MAC layer receives buffer memory, is used for the payload of the data that store M AC receives, and is sent to wireline interface end by DEVICE IF.Can change according to actual needs its size.
DEVICE IF: wireline interface processing unit, in this example, realize Ethernet card related protocol.On the one hand, receive Ethernet data bag from direct connected network interface card, buffer memory is to UWB TXBUF; On the other hand, from UWB RXBUF, obtain packet, send it to connected network interface card.This unit itself does not need to carry out matching addresses and parsing, realizes the transparent transmission of Ethernet data.
Under this structure, for different point-to-point wired connections, only need to revise DEVICE IF module, keep other circuit constant, can complete the support to new communication system wireless penetration, thereby make structure there is stronger versatility, be easy to expanded application.
Notice simultaneously, UWB TXBUF and UWB RXBUF are that a memory read-only and write port forms, and 4 ports of two memories can carry out read-write operation simultaneously, improve the throughput of system, support the full-duplex operation of DEVICE IF.
Disclosed is above only a specific embodiment of the present invention, but protection scope of the present invention is not limited to this, and the changes that any person skilled in the art can think of all should drop in protection scope of the present invention.
Claims (5)
1. the UWB MAC layer circuit of a support point point to-point communication, it is characterized in that comprising transmission buffer memory, receive buffer memory, caching control unit, wired interface unit and MAC Control Element, by sending buffer memory and receiving buffer memory and caching control unit, complete the transmitted in both directions of data between wired interface unit and MAC Control Element; Wherein:
MAC Control Element: coordinate base band and radio frequency jointly to complete point to point wireless communication, sending in data path the data stuffing in transmission buffer memory to media access control layer MAC Frame and be sent to base band; In reception data path, base band data is deposited to receiving buffer memory;
Caching control unit: complete the data buffer storage control that sends data path and receive data path;
Send buffer memory: be used for storing the data that wired interface unit receives, and be sent to base band as the MAC Frame of media access control layer;
Receive buffer memory: be used for the MAC Frame that medium access control layer receives, and be sent to wireline interface end by wired interface unit;
Wireline interface processing unit: receive packet from direct connected network interface card, deposit to sending in buffer memory; On the other hand, from receive buffer memory, obtain packet, send it to connected wireline interface end;
Sending in data path, by wired interface unit, Ethernet data bag is deposited to sending buffer memory; MAC Control Element is by data stuffing MAC Frame in transmission buffer memory and be sent to base band; In reception data path, MAC Control Element deposits base band data to receiving buffer memory; Wired interface unit will receive in buffer memory data upload to wireline interface end.
2. circuit as claimed in claim 1, is characterized in that, sends the structure of buffer memory and reception buffer memory, and control method and interface signal are identical.
3. circuit as claimed in claim 1, it is characterized in that the data content that MAC Control Element is not resolved and changed wired interface unit reception and send, the payload using complete data in frame format, avoid complicated data format to transform, realized data transparent transmission.
4. circuit as claimed in claim 1, it is characterized in that, send data path and receive data path independently, use respectively independently buffer unit, access when support sends data path and receives data path, thereby the full-duplex operation of support wired interface unit.
5. circuit as claimed in claim 1, is characterized in that for different point-to-point wired connections, only need to revise wireline interface processing unit, keeps other circuit constant, can complete the support to new communication system wireless penetration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210595899.7A CN103916160A (en) | 2012-12-28 | 2012-12-28 | UWB MAC layer circuit supporting point-to-point communication |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210595899.7A CN103916160A (en) | 2012-12-28 | 2012-12-28 | UWB MAC layer circuit supporting point-to-point communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105392053A (en) * | 2015-12-11 | 2016-03-09 | 上海纬而视科技股份有限公司 | Method for receiving and processing network video streams in real time |
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| CN1921461A (en) * | 2005-08-26 | 2007-02-28 | 北京格林威尔科技发展有限公司 | Transmission method of circuit business in passive optical network based on Ethernet |
| CN201174708Y (en) * | 2008-01-28 | 2008-12-31 | 英华达(上海)电子有限公司 | Ethernet access apparatus |
| CN101465740A (en) * | 2007-12-21 | 2009-06-24 | 北京中电华大电子设计有限责任公司 | WLAN network card chip capable of supporting PCI interface |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1921461A (en) * | 2005-08-26 | 2007-02-28 | 北京格林威尔科技发展有限公司 | Transmission method of circuit business in passive optical network based on Ethernet |
| CN101465740A (en) * | 2007-12-21 | 2009-06-24 | 北京中电华大电子设计有限责任公司 | WLAN network card chip capable of supporting PCI interface |
| CN201174708Y (en) * | 2008-01-28 | 2008-12-31 | 英华达(上海)电子有限公司 | Ethernet access apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105392053A (en) * | 2015-12-11 | 2016-03-09 | 上海纬而视科技股份有限公司 | Method for receiving and processing network video streams in real time |
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Address after: 102209 Beijing, Beiqijia, the future of science and technology in the south area of China electronic network security and information technology industry base C building, Applicant after: Beijing CEC Huada Electronic Design Co., Ltd. Address before: 100102 Beijing City, Chaoyang District Lize two Road No. 2, Wangjing science and Technology Park A block five layer Applicant before: Beijing CEC Huada Electronic Design Co., Ltd. |
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Application publication date: 20140709 |