CN104796919A - Dual-frequency combined terahertz wireless local area network protocol architecture - Google Patents
Dual-frequency combined terahertz wireless local area network protocol architecture Download PDFInfo
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Abstract
The invention discloses a dual-frequency combined terahertz wireless local area network protocol architecture. The architecture comprises physical layers and a data link layer. The physical layers comprise a 2.4GHz physical layer (PHY) based on a 802.11 protocol, and a terahertz PHY. The data link layer comprises two levels of media access control (MAC) sublayer. The two levels of MAC sublayer are an independent lower MAC layer and a public upper MAC layer. The independent lower MAC layer comprises a lower MAC layer based on the 802.11 protocol and a terahertz lower MAC layer. The architecture uses Wi-Fi of 2.4GHz frequency band for user access and low-speed data transmission, so that the wide coverage area characteristic of the local area network is guaranteed; when high-speed data transmission is demanded, the architecture switches to the terahertz frequency band for terahertz high-speed data transmission, so that the high speed characteristic of the terahertz local area network is ensured, and the terahertz wireless local area network has the ultrahigh speed networking communication capacity in a large coverage area.
Description
Technical field
The present invention relates to wireless communication technology field, the Terahertz protocol of wireless local area network framework of specifically a kind of double frequency combination.
Background technology
The procotol framework of the Wi-Fi local area network (LAN) based on agreements such as 802.11a/b/g/n of the 2.4GHz/5GHz frequency range of being used widely at present simplifies reference model as shown in Figure 1, it is mainly divided into physical layer (PHY) and data link layer (MAC), MAC layer is made up of MAC protocol sublayer and MAC administration module, and PHY layer relies on (PMD) sublayer by physical media, physical layer protocol converges (PLCP) sublayer and PHY administration module forms.
In this network configuration, communication frequency generally adopts 2.4GHz or 5GHz, and antenna all have employed nearly omnidirectional antenna, to ensure larger cyberspace coverage.But the loss of electromagnetic wave at free space and square positive correlation of frequency, namely carrier frequency often improves a magnitude, and electromagnetic free-space loss is by raising 20 decibels (dB), and the received signal to noise ratio of communication system will reduce 20dB.Therefore at Terahertz frequency range (carrier frequency is between 100GHz to 10THz), the 2.4GHz/5GHz adopted due to the existing Wi-Fi of communication carrier frequency ratio improves more than nearly two magnitudes, the received signal to noise ratio of communication system will reduce nearly more than 40dB, in order to reach the received signal to noise ratio identical with original communication system, just require that when transmitting power is constant dual-mode antenna gain improves nearly more than 40dB.We know that the antenna beamwidth of 10dB gain is approximately 45 degree, and the antenna beamwidth of 35dB gain just only only has 2.6 degree, reduces a more than magnitude.Therefore, the WLAN (wireless local area network) built in Terahertz frequency range is due to the improve of carrier frequency, and antenna beamwidth will greatly narrow, and coverage will sharply reduce, and existing Wi-Fi network structure cannot realize effective large regions scope and cover.
In order to solve the problem of this coverage, a kind of possible technical scheme adopts beam forming and control technology, as phased array antenna, utilizes beam forming and electric scanning mode to carry out rapid scanning aligning, communicate after aligning again.Namely this technical scheme is have employed in WLAN (wireless local area network)/territory fidonetFido 802.15.3c and 802.11ad of 60GHz frequency range.802.15.3c the beam control scheme adopted in as shown in Figure 2, its user access and wave beam are aimed at and are realized by adjusting beamwidth in real time, namely at user's access phase, antenna beamwidth is regulated toward meticulous sensing gradually from half omnidirectional, lock user region step by step, the antenna recycling high directed high-gain after accurately pointing to and aiming at carries out high speed data transfer communication.The beam control scheme adopted in 802.11ad as shown in Figure 3, its user access and wave beam are aimed at point sending and receiving end and are carried out respectively, that is: at user's access phase, first the nearly omnidirectional antenna Received signal strength of receiving terminal, transmitting terminal adjusts transmit beam direction in real time, omni-directional antenna transmission signal is used instead after finding best re-pointing, receiving terminal adjusts antenna again for accurately pointing to and real-time its beam direction of adjustment, after finding optimum reception sensing, receiving-transmitting sides utilizes high directional antenna to carry out fine alignment more simultaneously, to reach best alignment result, carry out high speed data transfer communication more subsequently.
Because Terahertz frequency range is higher at least again than 60GHz frequency range more than 1 times, therefore the gain of antenna will be larger, its beamwidth is narrower, if in the technical scheme that Terahertz frequency range adopts this similar spin-scanning alignment to communicate again, the spin-scanning alignment time needed will be longer, thus reduce the whole efficiency of local area network (LAN).Meanwhile, this spin-scanning alignment strategy itself is also very complicated and loaded down with trivial details, is difficult in actual applications realize.In addition, the core electron device of Terahertz frequency range is ripe not enough, and the phase array chip producing Terahertz frequency range is also more difficult, thus the current generation adopt beam forming and control program also unrealistic.Moreover because the wavelength of Terahertz frequency range is very short, it is all poor to characteristics such as the penetrating of material, diffraction, is easy to blocked by human body, article etc. and cannot realize efficient communication when indoor local area network is applied, now spin-scanning alignment again the communication technology will lose efficacy.
Summary of the invention
The present invention is for solving the problems of the technologies described above, propose a kind of Terahertz protocol of wireless local area network framework by combining based on the 2.4GHz frequency range Wi-Fi local area network (LAN) of 802.11 agreements and the double frequency of high speed Terahertz communication link, it utilizes 2.4GHz frequency range Wi-Fi to carry out when user's access and slow data transmission, ensure that the wide coverage characteristic of local area network (LAN); Be switched to Terahertz frequency range again when needs carry out high speed data transfer, carry out Terahertz high speed data transfer, ensure that the high-rate characteristics of Terahertz local area network (LAN); Make Terahertz WLAN (wireless local area network) possess compared with the ability providing superelevation speed connected network communication in large coverage, thus the contradiction of the wide coverage required for narrow beam and the local area network (LAN) of high speed Terahertz communication provide a kind of possible solution route.
Technical scheme of the present invention is as follows:
The Terahertz protocol of wireless local area network framework that double frequency combines, is characterized in that: comprise physical layer (PHY) and data link layer (MAC); Physical layer comprises 2.4GHz PHY based on 802.11 agreements and Terahertz PHY, and data link layer comprises two-stage media access control sublayer, and two-stage media access control sublayer is independent lower MAC layer and public upper MAC layer; Under described independence, MAC layer comprises based on MAC layer under the lower MAC layer of 802.11 agreements and Terahertz.
Whole network service is divided into two kinds of patterns: Wi-Fi mode and Terahertz pattern (THz pattern); The complete compatible existing Wi-Fi standard of Wi-Fi mode, function identical with existing Wi-Fi is provided, comprise: slow data transmission, the function such as access control, command, disconnection control, insertion authority control, roaming, safety, multi-user management of whole Terahertz WLAN (wireless local area network); THz pattern is for carrying out the data transmit-receive function of Terahertz antenna alignment and superelevation speed.
Described public upper MAC layer is used for selection and the Data dissemination of communication pattern, namely judge to need the data sent to be low speed data or high-speed data, if low speed data then utilizes Wi-Fi mode to send, if a large amount of high-speed data then adopts Terahertz pattern to send.
The described lower MAC layer based on 802.11 agreements and the 2.4GHz PHY based on 802.11 agreements provide physical layer and the data link layer support of existing Wi-Fi standard, realize Wi-Fi mode function.
Under described Terahertz, MAC layer and Terahertz PHY layer provide the superelevation speed data transmit-receive function under Terahertz pattern.
Ultrahigh speed data transmitting-receiving process under described Terahertz pattern, the wave beam of the control of user's access request and Terahertz antenna of namely first carrying out high speed data transfer under Wi-Fi mode is aimed at (wave beam aims at available phased array antenna or mechanical turntable antenna realizes), then the negotiation of receiving-transmitting chain parameter is completed, and parameter is handed down to Terahertz PHY, finally utilize the parameter of negotiation under Terahertz link, carry out the transmitting-receiving of high-speed data.
The detailed process that user access control and terahertz wave beam are aimed at is as follows:
First, in the access request stage, terahertz wave beam due to receiving-transmitting sides is very likely do not aim at, therefore need to utilize traditional Wi-Fi standard based on 802.11 agreements to transmit access request, namely utilize the Wi-Fi standard containing omnidirectional antenna to transmit access request and terahertz wave beam scan request;
Secondly, at wave beam alignment stage, receiving-transmitting sides first utilizes the technology such as the MIMO in Wi-Fi to carry out the rough estimate of both sides position, and utilizes this positional information to guide THz wave beam control system to carry out the coarse alignment of terahertz wave beam;
Then, receiving-transmitting sides carries out the fine alignment of terahertz wave beam again by cooperation iterative scans mode, the mutual of the information such as the control information in this process and alignment is all transmitted by Wi-Fi link;
Finally, then on the Terahertz link set up the transfer of data of ultrahigh speed rate is carried out.
Beneficial effect of the present invention is as follows:
1. utilize the Wi-Fi of 2.4GHz frequency range to communicate and ensure that the wide coverage characteristic of local area network (LAN) and the communication performance compared with low rate, Terahertz communication is utilized to ensure that the communication characteristic of superelevation speed, make Terahertz WLAN (wireless local area network) possess compared with the ability providing superelevation speed connected network communication in large coverage, the contradiction of the wide coverage that narrow beam and local area network (LAN) for the communication of high speed Terahertz require provides a kind of possible solution route.
2. the framework that combines of double frequency and utilize 2.4GHz frequency range carry out communicating pair position according to a preliminary estimate, mutual, the link parameter negotiation of alignment information etc., the whole efficiency avoid the shaping and spin-scanning alignment strategy of complicated phased array beam, shortening the aligning time, improve network.
3. Terahertz WLAN (wireless local area network) utilizes the Wi-Fi of 2.4GHz frequency range communication to ensure that when there are human body, article etc. and block in local area network applications, still can provide the reliable connected network communication of existing Wi-Fi speed grade, and can not network service interrupt.
4. all can the realizing mutatis mutandis phased array antenna or mechanical turntable antenna of terahertz wave beam, makes the wave beam of Terahertz be aligned in present stage Terahertz phased-array technique and has still possessed feasibility jejune period.
Accompanying drawing explanation
Fig. 1 is existing Wi-Fi network Protocol REference Model schematic diagram;
Fig. 2 is the beam control scheme schematic diagram in existing 802.15.3c agreement;
Fig. 3 is the beam control scheme schematic diagram in existing 802.11ad agreement;
Fig. 4 is architecture model schematic diagram of the present invention;
Fig. 5 is Terahertz superelevation speed data transmit-receive process schematic of the present invention.
Embodiment
The Terahertz protocol of wireless local area network framework that double frequency combines, the whole procotol architecture model of proposition as shown in Figure 4, comprises physical layer (PHY) and data link layer (MAC); Physical layer comprises 2.4GHz PHY based on 802.11 agreements and Terahertz PHY, and data link layer comprises two-stage media access control sublayer, and two-stage media access control sublayer is independent lower MAC layer and public upper MAC layer; Under described independence, MAC layer comprises based on MAC layer under the lower MAC layer of 802.11 agreements and Terahertz.
Whole network service is divided into two kinds of patterns: Wi-Fi mode and Terahertz pattern (THz pattern); The complete compatible existing Wi-Fi standard of Wi-Fi mode, function identical with existing Wi-Fi is provided, comprise: slow data transmission, the function such as access control, command, disconnection control, insertion authority control, roaming, safety, multi-user management of whole Terahertz WLAN (wireless local area network); THz pattern is for carrying out the data transmit-receive function of Terahertz antenna alignment and superelevation speed.
Described public upper MAC layer is used for selection and the Data dissemination of communication pattern, namely judge to need the data sent to be low speed data or high-speed data, if low speed data then utilizes Wi-Fi mode to send, if a large amount of high-speed data then adopts Terahertz pattern to send.
The described lower MAC layer based on 802.11 agreements and the 2.4GHz PHY based on 802.11 agreements provide physical layer and the data link layer support of existing Wi-Fi standard, realize Wi-Fi mode function.
Under described Terahertz, MAC layer and Terahertz PHY layer provide the superelevation speed data transmit-receive function under Terahertz pattern.
High-speed data transmitting-receiving process under described Terahertz pattern, as shown in Figure 5, the wave beam of the control of user's access request and Terahertz antenna of namely first carrying out high speed data transfer under Wi-Fi mode is aimed at (wave beam aims at available phased array antenna or mechanical turntable antenna realizes), then the negotiation of receiving-transmitting chain parameter is completed, and parameter is handed down to Terahertz PHY, finally utilize the parameter of negotiation under Terahertz link, carry out the transmitting-receiving of high-speed data.
The detailed process that user access control and terahertz wave beam are aimed at is as follows:
First, in the access request stage, terahertz wave beam due to receiving-transmitting sides is very likely do not aim at, therefore need to utilize traditional Wi-Fi standard based on 802.11 agreements to transmit access request, namely utilize the Wi-Fi standard containing omnidirectional antenna to transmit access request and terahertz wave beam scan request;
Secondly, at wave beam alignment stage, receiving-transmitting sides first utilizes the technology such as the MIMO in Wi-Fi to carry out the rough estimate of both sides position, and utilizes this positional information to guide THz wave beam control system to carry out the coarse alignment of terahertz wave beam;
Then, receiving-transmitting sides carries out the fine alignment of terahertz wave beam again by cooperation iterative scans mode, the mutual of the information such as the control information in this process and alignment is all transmitted by Wi-Fi link;
Finally, then on the Terahertz link set up the transfer of data of ultrahigh speed rate is carried out.
Claims (8)
1. a Terahertz protocol of wireless local area network framework for double frequency combination, is characterized in that: comprise physical layer and data link layer; Physical layer comprises 2.4GHz PHY based on 802.11 agreements and Terahertz PHY, and data link layer comprises two-stage media access control sublayer, and two-stage media access control sublayer is independent lower MAC layer and public upper MAC layer; Under described independence, MAC layer comprises based on MAC layer under the lower MAC layer of 802.11 agreements and Terahertz.
2. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 1, is characterized in that: whole network service is divided into two kinds of patterns: Wi-Fi mode and Terahertz pattern.
3. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 1, it is characterized in that: described public upper MAC layer is used for selection and the Data dissemination of communication pattern, namely judge to need the data sent to be low speed data or high-speed data, if low speed data then utilizes Wi-Fi mode to send, if a large amount of high-speed data then adopts Terahertz pattern to send.
4. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 1, it is characterized in that: the described lower MAC layer based on 802.11 agreements and the 2.4GHz PHY based on 802.11 agreements provide physical layer and the data link layer support of Wi-Fi standard, realize Wi-Fi mode function.
5. the Terahertz protocol of wireless local area network framework that combines of a kind of double frequency according to claim 1, is characterized in that: under described Terahertz, MAC layer and Terahertz PHY layer provide the superelevation speed data transmit-receive function under Terahertz pattern.
6. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 5, it is characterized in that: the Ultrahigh speed data transmitting-receiving process under Terahertz pattern, the wave beam of the control of user's access request and Terahertz antenna of namely first carrying out high speed data transfer under Wi-Fi mode is aimed at, then the negotiation of receiving-transmitting chain parameter is completed, and parameter is handed down to Terahertz PHY, finally utilize the parameter of negotiation under Terahertz link, carry out the transmitting-receiving of high-speed data.
7. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 6, is characterized in that: described wave beam is aimed at and adopted phased array antenna or mechanical turntable antenna to realize.
8. the Terahertz protocol of wireless local area network framework of a kind of double frequency combination according to claim 1, is characterized in that: the detailed process that user access control and terahertz wave beam are aimed at is as follows:
First, in the access request stage, utilize the Wi-Fi standard containing omnidirectional antenna to transmit access request and terahertz wave beam scan request;
Secondly, at wave beam alignment stage, receiving-transmitting sides first utilizes the technology in Wi-Fi to carry out the rough estimate of both sides position, and the positional information utilizing rough estimate to obtain guides THz wave beam control system to carry out the coarse alignment of terahertz wave beam;
Then, receiving-transmitting sides carries out the fine alignment of terahertz wave beam again by cooperation iterative scans mode, in this process, information interaction is all transmitted by Wi-Fi link;
Finally, then on the Terahertz link set up the transfer of data of ultrahigh speed rate is carried out.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141695A (en) * | 2015-09-16 | 2015-12-09 | 成都福兰特电子技术股份有限公司 | Terahertz wireless local area network protocol architecture |
| CN107888225A (en) * | 2017-10-27 | 2018-04-06 | 深圳市太赫兹科技创新研究院有限公司 | Wireless communications method and equipment |
| CN108183738A (en) * | 2017-12-28 | 2018-06-19 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time-division mixing multi-address method based on communication satellite |
| CN111130615A (en) * | 2018-10-30 | 2020-05-08 | 华为技术有限公司 | APT subsystem and communication system of spacecraft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101715212A (en) * | 2002-11-05 | 2010-05-26 | Lg电子株式会社 | Method and network for receiving data in radio communication system |
| CN101854361A (en) * | 2010-05-21 | 2010-10-06 | 南京邮电大学 | Next-generation internet protocol header compression method based on internet of things |
| CN102545972A (en) * | 2012-01-18 | 2012-07-04 | 中兴通讯股份有限公司 | Short-distance wireless communication device and method |
| CN202535552U (en) * | 2012-04-05 | 2012-11-14 | 电子科技大学 | 6LoWPAN gateway device |
-
2015
- 2015-03-13 CN CN201510110593.1A patent/CN104796919B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101715212A (en) * | 2002-11-05 | 2010-05-26 | Lg电子株式会社 | Method and network for receiving data in radio communication system |
| CN101854361A (en) * | 2010-05-21 | 2010-10-06 | 南京邮电大学 | Next-generation internet protocol header compression method based on internet of things |
| CN102545972A (en) * | 2012-01-18 | 2012-07-04 | 中兴通讯股份有限公司 | Short-distance wireless communication device and method |
| CN202535552U (en) * | 2012-04-05 | 2012-11-14 | 电子科技大学 | 6LoWPAN gateway device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141695A (en) * | 2015-09-16 | 2015-12-09 | 成都福兰特电子技术股份有限公司 | Terahertz wireless local area network protocol architecture |
| CN107888225A (en) * | 2017-10-27 | 2018-04-06 | 深圳市太赫兹科技创新研究院有限公司 | Wireless communications method and equipment |
| CN108183738A (en) * | 2017-12-28 | 2018-06-19 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time-division mixing multi-address method based on communication satellite |
| CN108183738B (en) * | 2017-12-28 | 2020-05-08 | 中国电子科技集团公司第五十四研究所 | Terahertz communication space division and time division hybrid multiple access method based on active antenna array |
| CN111130615A (en) * | 2018-10-30 | 2020-05-08 | 华为技术有限公司 | APT subsystem and communication system of spacecraft |
| US11387903B2 (en) | 2018-10-30 | 2022-07-12 | Huawei Technologies Co., Ltd. | APT subsystem and spacecraft communications system |
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