CN1379566A - Conflict-free access method and device suitable for shared medium networking - Google Patents
Conflict-free access method and device suitable for shared medium networking Download PDFInfo
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- CN1379566A CN1379566A CN01116609.6A CN01116609A CN1379566A CN 1379566 A CN1379566 A CN 1379566A CN 01116609 A CN01116609 A CN 01116609A CN 1379566 A CN1379566 A CN 1379566A
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Abstract
The MAC method for shared medium networking is characterized in that the time for starting to send data of each STAT is partially or completely staggered, or the time for starting to send data is staggered with the time for starting to send data of other stations using the same medium, so that the conflict caused by sending data simultaneously can be effectively or even completely overcome, and the effective throughput of a network, particularly under the condition of large flow, can be improved. The wireless LAN and Bluetooth wireless network can coexist when the wireless LAN and Bluetooth wireless network is used in the 2.4GHz industrial scientific medical wireless frequency band. The method is simple and easy to realize. By this method, a collision-free LAN or a high-speed wireless LAN which coexists with the existing Bluetooth network and has no influence thereon can be constructed.
Description
The present invention relates to a kind of conflict-free access method and device thereof of sharing the medium networking that be applicable to, belong to data communication field and digital communicating field.
In data communication, partly or entirely website can use shared medium, as bus of the common use of the website on the Ethernet, uses certain section radio band jointly by the website on the WLAN of IEEE 802.11 standard operations.The bus of this common use or radio band are exactly to share medium.Because medium shares, if two or more website sends data simultaneously, just may produce conflict, cause data correctly not receive and retransmit.Particularly share radio band, because a website can not receive when sending data, perhaps the intensity of the signal that comes from other website of the strength ratio of the signal that sends owing to oneself is much bigger when being difficult in transmission, and whether explanation conflicts, one frame data (or the bag data of saying so) will just can know whether conflict after sending, if clash, to arrive and just can know after data send, thereby can waste a lot of times.On the other hand, IEEE 802.11b WLAN and blueteeth network (being BLURTOOTH) all use 2.4GHz industrial scientific medical (being ISM:Industrial Scientific Medicine) radio band, if, also can clash in that the two exists simultaneously somewhere.
The purpose of this invention is to provide a kind of device and network system that can overcome medium access control (MAC is called for short in the back) method of this conflict and adopt this method.
The said MAC method of the present invention is a kind of MAC method that is used for sharing the medium networking, whether have at least a website will detect shared medium in the network system before sending data idle, this website only just begins to send data (STAT is called in the back letter) under it thinks the situation that shared medium is the free time, main points of the present invention are partially or completely to stagger the time that such website begins to send data, or use the time that begins to send data of the website of this medium to stagger with other.It is all inequality to refer to staggering fully here that each STAT begins to send time of data; And part staggers and refers to that time that some STAT begins to send data does not require and stagger, or this part and another part stagger, and each several part inside does not then require staggers, or the like.Because whether each STAT will detect shared medium before sending data idle, and only under it thinks the situation that shared medium is the free time, just begin to send data, so it can not influence the data that transmitting.If the website in the network system all is such STAT, the STAT in the then whole network system can not produce conflict because of sending data simultaneously.The clock that STAT begins to send other website in clock that time of data can be by certain STAT wherein or the network staggers.The different time periods stagger STAT begin to send the clock of data can be identical, also can be different.The STAT that staggers begins to send reproducible each STAT of arriving of clock of data, and can regularly or aperiodically be calibrated.But share medium blueteeth network and all spendable 2.4GHz industrial scientific medical of WLAN radio band.STAT can detect WLAN signal and blueteeth network signal.The STAT that initially staggers begins to send the clock of data and can artificially set or produce automatically.If detect the blueteeth network signal afterwards, the clock that the STAT that staggers begins to send data can change on the clock of home site of blueteeth network.If do not receive the clock of the home site of blueteeth network in the certain hour, the clock that the STAT that staggers begins to send data can change on the clock of artificial setting again or produce automatically again.Certainly,, detected the blueteeth network signal again, the microgrid (being PICONET) that may have WLAN and blueteeth network in this zone simultaneously has been described if a STAT had both detected the WLAN signal in a period of time; The home site here is exactly the home site of this microgrid.It is artificial that to set a example that the STAT that staggers begins to send the clock of data be that the clock of the artificial STAT of appointment is that the STAT that staggers begins to send the clock of data, during powering up initialization and every the regular hour (as 1 second or 1 minute), this STAT sends to other STAT with the clock of oneself, other STAT adjusts oneself clock by the clock that receives, and the clock that the STAT that staggers like this begins to send data can be consistent or basically identical.Automatically producing the example that the STAT that staggers begins to send the clock of data is during powering up initialization and every the regular hour (as 1 second or 1 minute), arbitrary STAT can send to the clock of oneself other STAT, other STAT adjusts the clock of oneself by the clock that receives, if certain STAT does not receive such clock, it can send to the clock of oneself other STAT, other STAT adjusts oneself clock by the clock that receives at last, and the clock that the STAT that staggers like this begins to send data can be consistent or basically identical.STAT begins to send the time of data and can stagger according to the time slot of blueteeth network.Stagger as time of in a time slot, STAT being begun to send data and with the time that the website of blueteeth network begins to send data.The time slot of a blueteeth network can be divided into plurality of sections by 5uS or 10uS, make the website by blueteeth network work begin to send data first period the initial moment, the initial moment of each section begins to send data afterwards respectively by the STAT of WLAN work.Can cut apart the physical layer services data unit that will send again and reorganize physical layer convergence protocol data unit (PLCP PPDU is called for short in the back) by the STAT of WLAN work, finish thereby make each PLCP PPDU in the certain hour before the time slot that sends this PLCP PPDU finishes, to send.PLCP PPDU here is exactly frame data.Data that send by a website one-time continuous of blueteeth network work and also be a Frame end to end.
The said device of the present invention refers to be used for sharing the device of medium networking, and its main points are the MAC method that is used for sharing the medium networking that this device has adopted the present invention to propose.This device is a website or a STAT, also the part of a website or a STAT.This device can include blueteeth network signal recognition circuit, WLAN signal recognition circuit and B/W sending controling circuit.The B/W sending controling circuit can wait the transmission of controlling blueteeth network data or WLAN data according to the output of blueteeth network signal recognition circuit and WLAN signal recognition circuit.This device can include time setting and the control circuit that begins to send data.
The said network system of the present invention refers to use the network system of sharing medium, and its main points are that this network system has adopted the MAC method that is used for shared medium networking of the present invention's proposition or included the device that is used for sharing the medium networking that the present invention proposes.The website of this network system can all be STAT, and the time that each STAT begins to send data staggers fully.This is a kind of network system that medium is shared in conflict of not having.The website of this network system can all be STAT, and each STAT time of beginning to send data is to stagger the time that begins to send data with the blueteeth network website.This is a kind of WLAN of shared medium, and it can coexist with blueteeth network.If suitably adjust the size of the Frame of its STAT transmission, then it can not influence the work of blueteeth network.This network system can have at least a STAT often to occur as the home site of the microgrid of blueteeth network, and the data of controlling each website on this microgrid send.Priority by this STAT or home site scalable blueteeth network and WLAN transmission data.
The present invention can realize sharing the conflict-free access of medium, improves the effective throughput under the network, particularly heavy traffic condition.Can realize the coexistence of blueteeth network and WLAN on the 2.4GHz industrial scientific medical radio band, even eliminate its conflict fully.Method is simple, realizes easily.
Claims (15)
1, a kind of medium access control (MAC is called for short in the back) method that is used for sharing the medium networking, whether have at least a website will detect shared medium in the network system before sending data idle, this website only just begins to send data (it is STAT that such website is called for short in the back) under it thinks the situation that shared medium is the free time, it is characterized in that, such website begins to send the time of data and partially or completely staggers, or uses the time that begins to send data of the website of this medium to stagger with other.
2, the MAC method that is used for sharing the medium networking as claimed in claim 1, it is characterized in that, the time that STAT begins to send data is that the clock by other website in the clock of certain STAT wherein or the network staggers, the different time periods stagger STAT begin to send the clock of data can be identical, also can be different.
3, the MAC method that is used for sharing the medium networking as claimed in claim 2 is characterized in that, the clock that the STAT that staggers begins to send data can copy to each STAT, and regularly or is aperiodically calibrated.
4, as claim 1, the 2 or 3 described MAC methods that are used for sharing the medium networking, it is characterized in that shared medium is blueteeth network and all spendable 2.4GHz industrial scientific medical of WLAN radio band.
5, the MAC method that is used for sharing the medium networking as claimed in claim 4, it is characterized in that, STAT can detect the WLAN signal, can detect the blueteeth network signal again, the STAT that initially staggers begins to send artificial the setting or generation automatically of clock of data, if detect the blueteeth network signal afterwards, the clock that the STAT that staggers begins to send data changes on the clock of home site of blueteeth network, if do not receive the clock of the home site of blueteeth network in the certain hour, the clock that the STAT that staggers begins to send data can change on the clock of artificial setting again or produce automatically again.
6, the MAC method that is used for sharing the medium networking as claimed in claim 5 is characterized in that, the time that STAT begins to send data is that the time slot according to blueteeth network staggers.
7, the MAC method that is used for sharing the medium networking as claimed in claim 6, it is characterized in that, the time slot of a blueteeth network is divided into plurality of sections by 5uS or 10uS, make the website by blueteeth network work begin to send data first period the initial moment, the initial moment of each section begins to send data afterwards respectively by the STAT of WLAN work.
8, as claim 6 or the 7 described MAC methods that are used for sharing the medium networking, it is characterized in that, STAT by WLAN work can be cut apart the physical layer services data unit that will send again, and can reorganize physical layer convergence protocol data unit (PLCP PPDU is called for short in the back), finish thereby make each PLCP PPDU in the certain hour before the time slot that sends this PLCP PPDU finishes, to send.
9, a kind of device that is used for sharing the medium networking is characterized in that, this device has adopted as claim 1,2,3,4,5,6, the 7 or 8 described MAC methods that are used for sharing the medium networking.
10, the device that is used for sharing the medium networking as claimed in claim 9 is characterized in that this device includes blueteeth network signal recognition circuit, WLAN signal recognition circuit and B/W sending controling circuit.
As claim 9 or the 10 described devices that are used for sharing the medium networking, it is characterized in that 11, this device includes time setting and the control circuit that begins to send data.
12, a kind of network system of sharing medium of using, it is characterized in that this network system has adopted as claim 1,2,3,4,5,6,7 or 8 and describedly has been used for sharing the MAC method of medium networking or wherein includes as claim 9, the 10 or 11 described devices that are used for sharing the medium networking.
13, the network system of medium is shared in use as claimed in claim 12, it is characterized in that the website of this network system all is STAT, and the time that each STAT begins to send data staggers fully.
14, the network system of medium is shared in use as claimed in claim 12, it is characterized in that the website of this network system all is STAT, and each STAT begins to send the time that time of data and blueteeth network website begin to send data and staggers.
15, share the network system of medium as claim 12,13 or 14 described uses, it is characterized in that, this network system has at least a STAT often to occur as the home site of the little net of blueteeth network, and the data of controlling this little online each website send.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01116609.6A CN1379566A (en) | 2001-04-06 | 2001-04-06 | Conflict-free access method and device suitable for shared medium networking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01116609.6A CN1379566A (en) | 2001-04-06 | 2001-04-06 | Conflict-free access method and device suitable for shared medium networking |
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| CN1379566A true CN1379566A (en) | 2002-11-13 |
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| CN01116609.6A Pending CN1379566A (en) | 2001-04-06 | 2001-04-06 | Conflict-free access method and device suitable for shared medium networking |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692605B (en) * | 2003-01-09 | 2010-05-26 | 索尼株式会社 | Wireless communication system, wireless communication device and wireless communication method, and computer program |
| CN101238687B (en) * | 2005-08-04 | 2011-12-21 | 皇家飞利浦电子股份有限公司 | Method, device and system for coexistence of wireless technology for facilitating competing identical bandwidth |
| CN1965503B (en) * | 2004-06-07 | 2012-10-31 | Nxp股份有限公司 | System and method for operating different mutually adjacent transreceivers |
-
2001
- 2001-04-06 CN CN01116609.6A patent/CN1379566A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1692605B (en) * | 2003-01-09 | 2010-05-26 | 索尼株式会社 | Wireless communication system, wireless communication device and wireless communication method, and computer program |
| CN1965503B (en) * | 2004-06-07 | 2012-10-31 | Nxp股份有限公司 | System and method for operating different mutually adjacent transreceivers |
| CN101238687B (en) * | 2005-08-04 | 2011-12-21 | 皇家飞利浦电子股份有限公司 | Method, device and system for coexistence of wireless technology for facilitating competing identical bandwidth |
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