CN1152518C - Metropolitan wide area network - Google Patents
Metropolitan wide area network Download PDFInfo
- Publication number
- CN1152518C CN1152518C CNB988082292A CN98808229A CN1152518C CN 1152518 C CN1152518 C CN 1152518C CN B988082292 A CNB988082292 A CN B988082292A CN 98808229 A CN98808229 A CN 98808229A CN 1152518 C CN1152518 C CN 1152518C
- Authority
- CN
- China
- Prior art keywords
- maincenter
- communication network
- broadband
- sector
- website
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 claims abstract description 63
- 238000012546 transfer Methods 0.000 claims description 18
- 239000013307 optical fiber Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 238000005538 encapsulation Methods 0.000 claims description 5
- RGNPBRKPHBKNKX-UHFFFAOYSA-N hexaflumuron Chemical compound C1=C(Cl)C(OC(F)(F)C(F)F)=C(Cl)C=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F RGNPBRKPHBKNKX-UHFFFAOYSA-N 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims 2
- 238000001228 spectrum Methods 0.000 description 28
- 230000005540 biological transmission Effects 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 23
- 238000009434 installation Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000013461 design Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 241000283014 Dama Species 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008709 cellular rearrangement Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- JNSGIVNNHKGGRU-JYRVWZFOSA-N diethoxyphosphinothioyl (2z)-2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetate Chemical compound CCOP(=S)(OCC)OC(=O)C(=N/OC)\C1=CSC(N)=N1 JNSGIVNNHKGGRU-JYRVWZFOSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 208000037805 labour Diseases 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2852—Metropolitan area networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0478—Provisions for broadband connections
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5603—Access techniques
- H04L2012/5604—Medium of transmission, e.g. fibre, cable, radio
- H04L2012/5607—Radio
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A wide area communication network includes at least two hub sites which are interconnected by a communication backbone. Each hub site provides wireless coverage in at least one sector. At least two remote sites reside in each sector and are coupled to a corresponding hub site via a point to multi-point broadband wireless system. The network preferably includes at least one service node which is accessible to the remote sites via the hub sites and backbone.
Description
Technical field
The present invention relates to the metropolitan wide area network of telecommunication system.More particularly, the present invention relates to the wireless point-to-multipoint system that will in the millimeter microwave a-n radio range a-n, operate and broadband, intelligent metropolitan area main line network carry out integrated so that can carry out various enhancing speeches, wideband data and multimedia telecommunication service.
Background technology
In the prior art, people generally understand point-to-point arrowband, a bit to multiple spot arrowband and point-to-point broadband fixed wireless system.Also be known technology a bit, generally be used for narrow band communication, for example Speech Communication the multipoint wireless power technology.Narrowband systems generally is the system that can produce per second 1.544 Mbits of data in an independent circuit or channel or be lower than this speed, and broadband system can produce the data transfer rate that is higher than per second 1.544 megabits in each circuit or channel.Though a bit also do not have widespread usage to arrive broadband telecommunication network now in Speech Communication arrowband " a bit to multiple spot " system applies to multipoint system.
Nowadays, one group of channel up to 24 per second 64 kilobits a bit can be assembled to multipoint system in the arrowband in a kind of being called as " T1 line (T1 line) ".But this T1 line still is considered to a kind of narrow-band devices when it is used to support a plurality of voice channel.In the voiceband telephone network, use the arrowband some multipoint system also to be had for many years in Europe.
Point-to-point broadband technology also is well-known.To 40GHz scope (being commonly referred to as " 38GHz "), use point-to-point broadband wireless system at 37 gigahertz (GHZ)s or " GHz ".When 38GHz broadband wireless link design was appropriate, the performance of its performance and fiber optic telecommunications was basic identical.
Because the fixed wireless technical costs is low, to install rapidly and operation easily, it is becoming a kind of widely used telecommunication service transmission method.Connect two places with point-to-point wireless traffic, most of work is by constituting at two top of building installation roof antennas and relevant indoor equipment.Needn't connect actual track between two buildings, this obviously is better than copper cash or optical fiber technology.Between building, connect optical fiber or copper cash and need spend many labours, and with excavate the street, obtain other relevant expenses such as allowance.Owing in most of the cases adopt the broadband fixed wireless system not need civil construction, so its installation is faster, more economical than the conventional method of " final mile (1ast mile) " in metropolitan area communication network interconnection.
Current 38GHz fixed wireless technology has many features that make it become tempting commercial telecommunication transmission medium.The 38GHz wireless technology provides high bandwidth path for speech, data, multimedia and video.Current technology allows to reach five miles link distance.Because all millimeter microwave propagation can be subjected to the influence of rainfall, so actual range is the function of geographical position or " rainfall area ".Under the weather conditions that often fall heavy rain, obtain performance identical with optical fiber and availability needs short link distance.
Propagating at the millimeter wqve radio of 38GHz generally need clog-free line-of-sight transmission.In actual applications, the minor diameter antenna is installed on the roof of office building, and, is installed on the window of office building in some occasions.The diameter of these antenna is generally in 12 to 24 inches scopes, though also use littler antenna.Manufacturer points out that for radio and modulator-demodulator part, the Mean Time Between Failures statistics that surpasses 10 years shows that hardware is highly reliable.Therefore, use for the point-to-point commercial speech in broadband and the data of the high degree of availability from per second 1.544 megabits (T1) to per second 45 megabits (DS3) range of capacity, current 38GHz fixed wireless technology is very suitable.
The commercial examples of applications in typical wireless point-to-point broadband is the interconnection of a plurality of servers in the campus area network (LAN).The another kind of application is the big city wide-area networking.Here, a plurality of campus lans in incity, same city are by the wireless device interconnection of 38GHz.To IEC interexchange carrier (IXC), it is public point-to-point commercial application of 38GHz Radio Link that the special use of Internet service provider (ISP) and other circuitous access device inserts.In the 38GHz scope, honeycomb and Personal Communications Services (PCS) operating personnel can dispose the wireless device of high degree of availability in their main line network, to support the back-haul between antenna farm, base station and the MTSO (MTSO).The wireless P-2-P technology of 38GHz also is used for can't help to provide when optical fiber provides the place of service the critical protection channel of task and other point-to-point alternate route to select need extending to from a fiber optic network.At last, utilize the interconnection of point-to-point wireless technology of 38GHz and public switched telephone network (PSTN), so that provide the local number dialing sound to obtain more and more widely application by competing local exchange carrier (CLEC).
Substantially the point-to-point wireless device of a kind of client of providing and business interconnection is provided Fig. 2.This connection will support broadband (data, video etc.) and arrowband (speech) to use.Client's building is shown 200, can comprise that a plurality of private branch exchanges hive off.It is connected to another building that accommodates communication network switch 203 202.These two buildings connect by the Radio Link between two roof antennas: an antenna 204 is on client's building, and another antenna 205 is on the building that holds switch 203.The bandwidth of this connection can be up to 28 T1 circuit, or DS3 (per second 45 megabits).Switch 203 is connected to PSTN 206, or is used for the public switched telephone network of local service and is used for the toll network 207 of long-distance service.Switch 203 also can be provided to the dialing access of internet 208.
Fig. 3 is a schematic diagram that is used for the FCC spectrum allocation schemes of 38GHz, comprises 14 total channels.Each channel width is 100 megahertzes (MHz).Each 100MHz channel is made up of two 50MHz subchannels, a sub-channel transmission, and another subchannel receives.The subchannel of these two 50MHz is isolated by the frequency spectrum of 700MHz.As shown in Figure 3, subchannel 1A is the 50MHz bandwidth, and is a send channel, and subchannel 1B is the 50MHz bandwidth, is a receive channel.Subchannel 1A and the subchannel 1B 700MHz of being separated by.This frequency band scheme has produced 14 channels (1400MHz or 1.4GHz) of 38 to 40GHz scope intermediate frequency spectrum of FCC distribution.
With reference to figure 4, Fig. 4 shows the basic spectrum management problem relevant with the use of point-to-point wireless system in the metropolitan areas.Because building is close to each other in metropolitan areas, propagating by the information of Radio Link may be overlapping, thereby makes can not use same channel (1A/1B) in adjacent system.In this figure, the antenna on building is to predetermined its signal of receiver emission, but the antenna on the adjacent buildings also can receive a part of signal.Sort signal disturbs and is called " common-channel interference ".
In Fig. 4, the main building 401 that comprises a switch 402 is by four roof antenna 403A, and 403B, 403C and 403D are connected to far-end building 404A, and 404B, 404C and 404D, each far-end building have its oneself corresponding roof antenna.Shown between these buildings is that the concept nature of the used frequency spectrum of each point-to-point wireless system is represented.Because building all is close together, the transmission signal between the building overlaps.Common-channel interference described in falling for fear of the preceding paragraph must use different channels to connect adjacent building.For example, channel 1A/1B is used for building 404D, and channel 2A/2B is used for building 404C.Although channel 1A/1B has partly covered the transmission of 2A/2B,, avoided common-channel interference because two systems have used different frequency (channel).Therefore, the antenna of a building may send to wrong reception antenna to its signal of a part, but each system is " tuned ' a different frequency, thereby is left in the basket from the transmission of the adjacent system that uses other frequency.
Frequency management technology shown in Fig. 4 has been avoided the common-channel interference in the wireless network of deployment in the crowded urban district, but is to use the FCC channel to avoid common-channel interference can not utilize the information transfer capacity of licensed spectrum maximumly, thereby efficient is not high.Thereby need address this is that.
Fig. 5 shows an extra spectrum problem of management relevant with Point-to-Point system.Building 501 is connected with building 502 by channel 1.Building 503 is connected with building 504 by channel 2.The predetermined wireless transmission of real connecting line 505,506 representatives.But, because " divergent-ray " is about 2 degree at emission source, signal may by be not be scheduled to but other system of being in just at the right time in the divergent-ray scope of origination system receive.Chain-dotted line 507 is represented this situation, has wherein received to the system mistake in the building 4 transmission of system in the building 1.If used two kinds of different frequencies, will not have common-channel interference.This makes the frequency management in the point-to-point wireless network need use a plurality of channels to avoid interference again, and can not fully use frequency spectrum to improve bandwidth utilization.
The roof space is valuable, and quantity, size and the position of antenna are set is limited on the roof in many cases.Because Point-to-Point system uses independently antenna for each wireless connections, so the building roof space becomes limiting factor.Along with the increase of the quantity that is arranged on the Point-to-Point system on the building roof, not only spectrum management consideration aspect can limit the quantity of the system that can dispose, and the physical space that each antenna can be used on the roof is the quantity of restriction system also.Therefore, needing can the extended wireless network capacity and extending user quantity and need not increase the solution of respective antenna roof quantity thus.
Point-to-Point system provides so-called full-time connection for the user.Full-time connection is " opening forever " (connection and effective), the transmission of outstanding message always.Full-time wireless connections utilization is in case specify other user of back with regard to out of use special-purpose frequency spectrum.Therefore, point-to-point wireless system is applicable to continuously or transmission for a long time.Point-to-Point system need can not support variable bit rate or " burst " data service of bandwidth varying effectively.Because each system utilizes the channel that distributes on the basis of full-time " open-minded forever ", and no matter amount of information or transmitting continuous time on the link, the bandwidth that the Point-to-Point system that variable bit rate is used uses is wasted.Therefore, " burst " data service for as LAN transmits lan data needs the solution of more effectively utilizing frequency spectrum.
Summary of the invention
An object of the present invention is to create " omnicharacteristic " the local metropolitan area broadband telecommunication network infrastructure that to support senior speech and data service.
Another object of the present invention is to use the crucial starter (key enabler) of wireless frequency spectrum as the access of the local metropolitan area broadband telecommunication net that senior speech and data service are provided.
A further object of the present invention is to utilize the usable spectrum that distributes in the local metropolitan area broadband telecommunication net maximumly.
A further object of the present invention is to overcome the spectrum management restriction relevant with the use of point-to-point fixed wireless telecommunication system.
A further object of the present invention is to make the multichannel utilization in the local metropolitan area broadband telecommunication net can improve network capacity extraly.
A further object of the present invention is that the quantity that provides on the roof the required radio telecommunications system of the access of local metropolitan area broadband telecommunication net is minimized.
A kind of form of network according to the present invention, wide-area communication network comprise at least two maincenter websites by the communication trunk interconnection.Each maincenter website provides wireless coverage at least one sector.In each sector, there are at least two remote stations, and multipoint broadband wireless system are coupled to corresponding maincenter website by a bit.This network preferably includes at least one can be by the service node of remote station by maincenter website and main line visit.
The another kind of form of network according to the present invention, local metropolitan area, broadband telecommunications network inserts for a plurality of users provide the fixed broadband wireless local loop.The user comprises one with the user radio electric unit corresponding to the frequency work of the residing mesh of described user sector.At least one user has a plurality of relevant client devices, and is included in the device of carrying out statistical multiplexing between a plurality of client devices and user radio electric unit.This network comprises a plurality of maincenter websites that interconnected by the main line based on Sonet.The maincenter website comprises a plurality of maincenter website radio units with optional frequency work, and at least one radio unit is corresponding to a mesh sector.The maincenter website also is included between a plurality of users in each described mesh sector the dynamically device of allocate communications bandwidth.This network preferably includes a plurality of value-added service nodes that are coupled in main line and can be passed through maincenter website and main line visit by the user.This network also comprises a central operation node, and it is connected to each described maincenter website and provides the remote access of maincenter website and the Long-distance Control user capture of control and value-added service node by a control net.
Description of drawings
By below in conjunction with the detailed description of accompanying drawing, can clearer understanding be arranged to these and other feature, purpose and the advantage of network implementation example of the present invention to example embodiment.
Fig. 1 is the schematic diagram of the local metropolitan area of explanation broadband telecommunication net, and it utilizes the client's access that is provided to local metropolitan area broadband telecommunication net with the fixed wireless Point-to-Point system of 38GHz operation;
Fig. 2 is the schematic diagram of typical Point-to-Point system structure that is used for being provided to through a switch client access of telecommunication service of explanation prior art;
Fig. 3 is explanation the 100MHz channel distribution is the schematic diagram of 38GHz spectrum allocation schemes that is used to transmit and receive two 50MHz subchannels of signal, and wherein each transmits and receives subchannel and is isolated by the 700MHz frequency spectrum;
Fig. 4 be explanation according to the schematic diagram that is based upon the point-to-point Fixed Wireless System in the maincenter net structure that wherein has one-one relationship between maincenter and the client's building wireless system of prior art, the common-channel interference phenomenon that runs in the point-to-point Fixed Cellular Network is represented in the overlay region;
Fig. 5 is the schematic diagram that the another kind of common-channel interference phenomenon that runs in the point-to-point Fixed Wireless System of prior art is described;
Fig. 6 A is some schematic diagram to the multiple spot facility of a fixed wireless that explanation is used in system of the present invention, wherein has the many-one relationship between maincenter and the client in a sector;
Fig. 6 B is the block diagram that further specifies the maincenter website of Fig. 6 A that uses in the network of the present invention;
Fig. 7 is that explanation utilizes some schematic diagram to the of the present invention local metropolitan area broadband telecommunication net of multiple spot fixed wireless technology that is provided to user's access of arterial grid and various telecommunication services with the 38GHz operation;
Fig. 8 is the block diagram of an embodiment custom system using in the system of the present invention.
Preferred implementation
1. network topology
Network of the present invention uses fixed wireless microwave scheme, and it allows cental system and the multiple spot that is arranged between the far end system of client's building concerns a bit.The technology of this being called " multichannel access " or " a bit to multiple spot " is improved spectrum efficiency (and available bandwidth) and is strengthened intelligent traditional voice and the dataphone service that can support in the metropolitan wide area network by combination, and commercial and resident's broadband multimedia services.
Fig. 6 A show with " one-to-many " between maincenter and client's building radio system close be feature a bit to multipoint system.In Fig. 6 A, maincenter website 601 is equipped with antenna 602,603 and 604.Antenna 602 is launched to " sector " 605 of the physical space that a plurality of user's buildings 606,607,608 and 609 of covering occupy.Antenna on the building 606,607,608 and 609 in the sector 605 is all communicated by letter with the single maincenter antenna 602 of sector 605.The sector can be that 15 to 90 degree are wide.Independent channel of owned building general using in the sector is so for the building in the same sector, common-channel interference no longer is a problem.
In order to prevent the common-channel interference at sector-edge place, maincenter website 601 is given the adjacent sectors that in fact is isolated from each other Frequency Distribution.For example, can give sector 602 allocated channel 1A/1B, and give sector 604 allocated channel 2A/2B.Thereby a bit can make full use of each channel that distributes in the sector and come transmission information multipoint system, this with need only be to utilize the spectrum management of the Point-to-Point system of a plurality of channels to require to have formed stark contrast in same geographic area for fear of common-channel interference.
Fig. 6 B shows the example embodiment of a maincenter website 601 that uses in network of the present invention.Antenna 602,603...60n is corresponding to each channel.A channel is generally distributed to a corresponding mesh sector 605.But, needing under the situation of extra bandwidth, network of the present invention is given one or more mesh sectors a plurality of channel allocation.Each antenna preferably includes a corresponding maincenter radio unit 620.For fear of the loss of signal relevant with coaxial cable and waveguide on 38GHz, the maincenter radio unit preferably is coupled to becomes an integral unit on the respective antenna that is installed in roof or cat head.
The maincenter website also comprises the maincenter indoor unit (IDU) 622 that is coupled to maincenter radio unit 620 by apparatus interconnection link (interfacility link) 624.Apparatus interconnection link 624 is a kind of broadband connections, preferably adopts the optical fiber type of attachment.Maincenter IDU is connected in the central controller 626 of one or more management maincenter websites 601 interior operations and data transmission.Also comprise a trunk interface 628, transmit so that can be connected and carry out data with network backbone.
Fig. 7 shows an embodiment of the network of the present invention in the commercial metropolitan area network that utilizes the 38GHz multichannel to insert wireless technology.This network comprises broadband main line 702, and it can use optical fiber, copper cash or wireless technology to realize.The big square frame representative that is arranged in annulus is a bit to multiple spot maincenter website 704, and each covers at least one mesh sector 706.In commercial urban environment, dispose mesh sector 706 by rights, make bandwidth towards geographical position with suitable building (client) density.In case gone up main line 702, client's business is routed to the network node that value-added service is provided of any amount.The example of this service node has local Communication Switch-Board 706, trunk board 708 and point of presence 710 and video traffic point 712.Network of the present invention also comprises at least one central operation node 713, and it is connected to each maincenter website 704 by the such control net 715 of for example frame relay network.
1 of 38GHz generally is made up of the mesh 714 with 3-5 mile diameter (1.5-3 mile circuit distance) the structure of multipoint radio network.Each mesh 714 comprises a plurality of sector 706-1,706-2 ..., 706-n, sector width scope from 15 to 90 degree.A maincenter website 704 is positioned at the central authorities of each mesh, is arranged in a plurality of remote subscriber systems (user) 716 and maincenter radio communication of sector client's building, to set up Radio Link.Distribute in corresponding maincenter website 704 provides the bandwidth in the given sector in this sector the remote subscriber system.A sector can utilize whole bandwidth of the channel of a single permission, or can be in a sector " piling up " a plurality of channels, to satisfy total user's request to bandwidth.When using a plurality of channel, increase an additional maincenter radio unit 620 and an antenna that is used for this sector for this maincenter website 704.
The regulation of best sector width is a very important problem.A kind of purpose of design is the cost minimum that will make the Effective Radiated Power (ERP) that needs.Narrow sector produces higher antenna gain, so only need less power to reach given ERP.But each sector needs the radio system of itself, covers the required equipment cost in a given geographic area so narrow sector has increased.In last analysis, the maincenter site design is to the total customer demand of capacity and the function of Customer Location geographical distribution.
More of the present invention to the multiple spot metropolitan area network in, maincenter website 704 is preferably on the main line 702 by optical fiber or high power capacity microwave radio equipment with sonet ring shape interconnected.Toll telephone merchant 708, Internet service provider 710, the service node of local PSTN board 706 and video source 712 and so on is interconnected to fiber optic loop, links fiber optic loop by closing to establish with the maincenter website in some cases.Therefore, in case the client is connected to network through wireless access links, just can visit any business that the miscellaneous service node is supported.
The present networks method needs transmission and the routing capability on the main line, with being connected between convenient a plurality of Customer Locations and between Customer Location and the Network node.Asynchronous transfer mode (ATM) is the preferred transport layer agreement of metropolitan area network structure of the present invention.Also can estimate to use more traditional connection-oriented or asynchronous phone transportation protocol as operator's transition to full atm network in a period of time.Reason preferably includes ATM (OC-3c) and STM (DS-3) interface between maincenter website 704 and main line 702 for this reason.
2. wireless ATM
This net structure utilizes asynchronous transfer mode (ATM) as the basic transmission method in the network.ATM is a kind of packing tranmission techniques that information sets is made into a plurality of cells.Each cell has one " letter is first " and one " pay(useful) load ".Data type and data in the first explanation of the letter pay(useful) load stop wherein.Each cell spreads through the internet through multiple path, and can reach terminal point to be different from original order.The first information of letter that is included in the cell allows to rearrange cell with the correct order before transmitting to client device.By data encapsulation in pay(useful) load, ATM cell can transmit many standard telecommunications speeches, data and video traffic.Therefore, ATM can be combined in speech, data and video in the single telecommunications transmission network.
A key structure factor of network of the present invention is on one point to using ATM in the wireless transmission of multipoint system (wave point).Between user 716 and maincenter website 704, client's specific transactions (Ethernet, frame relay, DS-1, DS-3, ISDN, speech) is encapsulated in the ATM pay(useful) load.Therefore, by based on the agreement of cell the end-to-end ATM that benefits from the network of the business of effective processing transmit, and business that must interim channelizing on main line at maincenter website 704 by time division multiplexing.Under above-mentioned any one situation, all professional aerial transmission through ATM make it possible to realize important bandwidth on demand function in network.
3. modulate and power system capacity
Utilize the wireless device of the modulation technique of QPSK and 4FSK and so on to produce the effective data rate of every hertz 1 bit of per second.When in the 50MHz full-duplex channel (that is) for every grant channel 100MHz frequency spectrum altogether, 50MHz on each direction when distributing the 38GHz frequency spectrum, the maximum Point-to-Point Data rate of current fixed wireless technology is 45Mb/s, or DS-3.The raising of the more advanced modulation technology of 16QAM and 64QAM and so on and whole system gain together can produce every hertz of 4-5 bit of per second or higher data transfer rate.This represents significantly improving of every channel available bandwidth.Therefore, can obtain every channel OC-3 in every sector (155Mb/s) and higher data transfer rate at 38GHz.Can expect the spectrum efficiency of every hertz of 6-8 bit range of per second.Can easily obtain to support many sectors, the multichannel mesh of aggregate date rate of the thousands of megabits of per second of available bandwidth according to relatively conservative design.Less conservative design will produce higher mesh capacity.
4 bandwidth on-demands
Since in order to transmit by wireless network data encapsulation in cell, so might utilize radio spectrum more efficiently than non-ATM wireless device.This is the result owing to " statistical multiplexing " technology of a kind of being called.Statistical multiplexing utilized starting at random of transfer of data in the system and all users not need the fact of bandwidth if having time.Statistical multiplexing makes the cell that comprises the data that different user starts transmit with minimum required frequency spectrum.Say that on this meaning the user shares the frequency spectrum that distributes in the Wireless ATM Network, and in any given time system all users' aggregate bandwidth demand by system in usable spectrum in time provide.
This has caused data capacity " statistical gain ", this statistical gain make the communication network operating personnel can according to will be not at a given customer location (for example, multi-user's exchanger user hive off office building) can need distribute to hypothesis " contribution exceeds the quata " Radio Link of all told of this position if having time.To most of thereon information are the links that transmit with burst (" bursty data "), can have up to 10 to 1 (10: 1) exceed the quata to contribute than (statistical gain), as in the LAN-LAN occasions for communication.Wherein mix of traffic maybe needs network by other professional skew of the point-to-point connection of network (circuit) to speech more communication session the duration, and more typical statistical gain is 2: 1 or 3: 1.
The ATM cell letter can make the parameter of each cell by the priority level ordering first also comprising.Therefore, the cell with TP top priority transmits by network immediately, and the cell that has than low precedence can postpone to be finished by exchange up to the cell of higher priority.This attribute of ATM makes its " quality of service " that can support to have variation, or the business of QOS.When this priority level system is used in combination with statistical multiplexing, information is transmitted by wireless network with very high efficient.For example, can be decomposed into a plurality of cells to a big file, and in the packet stream that is scattered with than other cell of small documents, send by network.Therefore, small documents needn't wait for that big file transmission finishes, and the operating efficiency of whole network is higher.
Dynamically distribute bandwidth between the user 716 in a given sector 706.Therefore, the moment demand of 716 pairs of high bit rate burst informations of a given user can not satisfied by the bandwidth that other users in the sector 706 use by utilizing this moment.This can be by the variable distribution according to need (time division multiple access or TDMA) to user's time slot, or the variable distribution according to need of frequency (frequency division multiple access or FDMA) finishes, or finish by making up two kinds of multiplexing techniques (demand assignment multiple access or DAMA).
The technology of dynamically distributing bandwidth between these buildings in a sector with distribute to each building in client's the ATM statistical multiplexing (contribution exceeds the quata) of bandwidth when combining, the result has greatly improved the information transfer capacity of the wireless frequency spectrum that uses in the network of the present invention.Can further increase capacity by the efficient modulation scheme of using 16QAM and 64QAM and so on.
5. set up centre structure
System of the present invention has used a kind of being called the collocation strategy of " setting up maincenter ", and an end of many Radio Links is focused on the independent building roof or " maincenter ".Each maincenter 704 can utilize Radio Link to be connected to many far-end radio systems 716.Maincenter 704 in metropolitan areas can pass through wireless, optical fiber, or other high power capacity telecommunication apparatus is with annular, mesh shape or the interconnection of other main line network topologies.Give maincenter 704 equipment ATM exchanges or TDM multiplexing equipment to cross over main line 702 bridge joint Radio Links, set up the connection between the user, or the user is connected to other position on the network, so that the visit miscellaneous service.By setting up maincenter, utilize networking to increase the effective range of wireless access links greatly, and the visit to various speeches, data and multimedia service is provided.
Of the present invention set up centre structure can be applied to point-to-point and any to the multiple spot Fixed Wireless System.In point-to-point wireless system, each maincenter is that each link that is connected to main line network is supported an antenna.Therefore, the roof space has limited the quantity number of links of network (and therefore also limited) of the antenna that can be supported by the single maincenter that utilizes point-to-point Fixed Wireless System.Fig. 1 shows an embodiment who uses the network configuration of the point-to-point radio telecommunications system of 38GHz, and wherein wireless device is connected to a metropolitan area arterial grid to Customer Location.This system has used a kind of Point-to-Point system, wherein communicates by letter between a maincenter 100 and specific buildings 102 or campus 104.Arterial grid is made up of the high power capacity telecommunications transfer equipment 106 that connects maincenter with loop configuration, and each maincenter is connected to each building or position, campus by " final mile " wireless connections.
On one point in the multiple spot Fixed Wireless System, the maincenter antenna of lesser amt is provided to the connection of client's building in a sector that changes and comprise many client's buildings between 15 and 90 degree.Under above-mentioned any one situation, set up effective access that centre structure provides network backbone, so can communicate between the user, and make the user can visit the value-added service that is connected to network.
6. remote subscriber system equipment and business support
In system of the present invention, user 716 can be single client's form, in a building form of a plurality of user system, or or even the form in a kind of client campus.Fig. 8 shows the embodiment of the custom system that the Multiuser System uses in a building.
With reference to figure 8, antenna 802 becomes one with the radio set of the outdoor unit that is used for installing on the roof (ODU) 804 of compact package.For quick, low-cost installation and accessible, 4 inches bridges of the most handy standard of ODU are fixed.Outdoor unit 804 is connected to by the apparatus interconnection link (IFL) 808 that is made of coaxial cable or optical fiber and is usually located at the indoor unit (IDU) 806 in the public space in the building.
In IFL 808, use optical fiber, for closely having fitted together at building inner cable pipeline and having had only very little space to draw the place of new cable that very big installation facility is provided with telecommunication apparatus.This is the installation question that often runs into.Because optical fiber is much thinner than coaxial cable, pull out more much easierly so it is passed existing building cable pipeline than coaxial cable, make installment work than faster with cable, cost is also low many.
In IFL 808, use another advantage of optical fiber relevant with the loss of signal between IDU 806 and the ODU 804.In most of the cases, the physical property of coaxial cable is limited in below 1000 feet the propagation of signal.This has limited the interval between the ODU 804 and IDU 806 in the building.Because the public space that offers telecommunication apparatus (comprising IDU) in most of commercial office buildings is at basement, and ODU 804 is installed in the roof, this throws into question for the installation in 15 layers or higher bigger building.Optical cable does not have the distance limit between this IDU 806 and the ODU804.Therefore, the public space position of telecommunication apparatus does not hinder installation in the building.
Indoor unit 806 is used for being connected with client device (CPE) 810.A preferred embodiment of indoor unit comprises a frame, and it has the slot of the industrial siding an outpost of the tax office 812 that is used to accept business.Line cards 812 physically is inserted in the frame when the client is installed, and activates by the software command from centralized network operation center.Provide Line cards 812 be for support specific telecommunication service (DS-1, DS-3, ISDN, frame relay, Ethernet, token ring, ATM, or the like).Line cards 812 is connected to a base plate again, is used for protocol conversion is used for to the maincenter transmission and is transformed into the service-specific agreement from ATM being used for transmitting from maincenter to ATM.A frame preferably can be supported 10-20 Line cards 812, and each Line cards can be provided for a plurality of ports with the CPE interconnection.For example, a typical DS-1 Line cards allows 4 DS-1 circuits of every card connection (4xDS-1).The Line cards price is not high, and therefore, in case at a building basic far end system equipment has been installed, it is very low to increase the expense that the client improved in network.In case installation, the business that Line cards 812 provides just can local be started, or the order remote starter that passes through the network transmission that preferably produces by central operation node 713 (Fig. 7).
By this way, the indoor unit price is than the demand that has satisfied telecommunication service effectively.Most of can support by the above-mentioned card frame of 10-20 for a short time to medium sized commercial office building.In very big building, two or more IDU can be with " daisy chain " form interconnection expanding the quantity of available service interface, and the different floors that are installed in public space and main frame place are to provide service to the client.The present invention also for very little, indoor unit provides the fixed service interface at a low price, so that provide service to small office/family office (SOHO) and dwelling house client.These little IDU are not to use frame and base arrangement, but make the encapsulation unit of fully integratedization at a low price, to support one group of intended service.The example of this class low side IDU will be provided for the interface of a plurality of 64KB/s voice lines, with the ISDN or the ethernet port that are used to be connected distant office LAN.
7 operations are considered
Except improved spectrum efficiency with obtain bandwidth increases, that utilizes 38GHz a bit can also save operation and cost of device significantly to the multipoint wireless power technology.Replace a plurality of antennas on the maincenter roof to eliminate operational complexity with more one or more to multiple spot maincenter antenna, and reduced installation cost.In case a maincenter 704 has been installed, has been increased the thing that the client has become installation custom system 716 in the client's building coverage sector 706 in to network.Need design and installation to support the equipment of each both link ends to form distinct contrast under this and the present point-to-point 38GHz wireless technology situation.
In addition, but business provide with structural change can be by coming telemanagement to the service attribute of the software definition of the custom system that is arranged in client's building by network download.Provide, monitor, change and control professional from central network operation center by technical staff with proper authorization.Business provides " directly perceived (seethrough) " of the end-user service interface card systems soft ware makes from maincenter to the remote subscriber system becomes possibility.
8. professional
Network of the present invention can be supported all can be by the business of Wireline telecommunication technology support.These business comprise the category of two kinds of generalized definition: the professional and emerging broadband multimedia services of conventional telecommunications.
The conventional telecommunications business that is used for the commercial market comprises: (1) voice grade this locality and long-distance service, (2) be used for the DS-1 of speech and data, the point-to-point special equipment of n x DS-1 and DS-3 speed, (3) data exchange service of exchange 56Kb/s and frame relay and so on and (4) are with the high power capacity Point-to-Point Data equipment of OC-3 or more speed operation.
The emerging broadband multimedia services of network support of the present invention comprises: high-speed the Internet access, the online hosting and information service, the local lan of Ethernet and token ring and so on-LAN business, with programming of the commercial video of desktop conference, relevant business and the video traffic of video training (distance learning) and so on as required.Provide wireless client access link with in fact any data transfer rate, to satisfy these professional bandwidth needs to network.
The business that offers the dwelling house client comprises an above-mentioned grouping that is used for telecommunications and small office/family office (SOHO) application.A traffic packets that is used for these clients can comprise the local and long distance call business, the high-speed the Internet access of information service and Email and optional video programming.Also can provide access for the dwelling house client with any speed to network.
Can use the support of ATM quality of service (QOS) parameter based on the broadband multimedia data business of using.For example, a client can preengage CIR (CIR) connection to 2 megabits of network.Expense in this client's the ATM cell all will guarantee the actual throughput of 2 megabits when each this client needs such amount of bandwidth on the net.When this client does not use the network capacity (on one point to the frequency spectrum in the multiple spot fixed wireless access network network) of this 2 megabit, can be used for other transmission on the network to it.
ATM QOS parameter can be used for providing the throughput grade of variation on network, so that the network operation personnel can formulate the price that conforms to these throughput grades.For can't stand especially discontinuous cell in transmitting the voice service of intrinsic delay, PVC (PVC) guarantees to pass through immediately with predetermined data rate.When service request being arranged, PVC uses constant fixed-bandwidth in network at every turn.Even delay little arrive with millisecond meter relevant with the cell rearrangement, the human ear also can perceive the accumulative effect of this delay.Rely on and set up end-to-end path effectively by network, cell transmits continuously by this path, and PVC has overcome this problem in the atm network.In itself, PVC is that a kind of circuit switching by atm network connects.Fixed wireless a bit to multidrop network in, bandwidth is distributed between custom system and maincenter with full-time basis duration of voice call.
Other business based on ATM utilizes Switched Virtual Circuit (SVC) to provide, and SVC transmits distribution bandwidth to the grade priority scheme that the data based on " active volume " transmit to the user according to collateral security data through-rate.SVC is used to manage with the critical condition of data with to the QOS parameter of the relevant throughput of the cost of client's business, supports variable bit rate (burst) data service most effectively, for example LAN communication.
In network of the present invention, in system, collect and the storage event data, so that charge according to the type of service that offers the client.The charging that is used for data service can consider to provide the moment of business, the Internet resources that the client utilizes (for example, peak-data rates, the duration data rate, packets of information/byte the quantity that transmits), the quality of service that provides is owing to packets of information quantity and other general irrespective factor in conventional telecommunications service billing algorithm of blocking or other Network Transmission mistake is lost.For voice service, metering data is noted down (CDR) form by the switching equipment of setting up in the network in detail from traditional conversation and is collected.
More of the present inventionly will support large-scale following commerce and individual telecommunication service to the multiple spot broadband metropolitan area network, for example, use the vehicle data application of the airborne computer system that city and road map and global location data and local transport information are combined.The bumper car radar is that the another kind of vehicle that is fit to is used.In addition, a bit can support to have the main frame of the individual computing application of WiMAX switching performance to multidrop network, comprise personal digital assistant, LAN is moved in the hand-held network terminal and campus, or the like.
Claims (38)
1. WAN communication network comprises:
At least two maincenter websites, wherein each maincenter website is applicable in the sector of a correspondence and provides broadband wireless communications to a plurality of users;
At least two remote stations, each remote station is corresponding to one in the described sector, wherein each described sector comprises that a plurality of customer locations and each described customer location further have a plurality of users, described network is applicable between described a plurality of users and dynamically distributes bandwidth that described network also is applicable between the described a plurality of users on each described customer location carries out statistical multiplexing;
A bit to multipoint broadband wireless system, each remote station is coupled to the maincenter website of correspondence by more described to multipoint broadband wireless system, more described to the multipoint wireless system data encapsulation in ATM cell so that transmit by wireless system;
Communication trunk is applicable to described at least two the maincenter websites of interconnection, and described communication trunk makes between described a plurality of users in each described corresponding sector and can communicate; With
A plurality of value-added service nodes that are connected to described communication trunk are used for providing to described a plurality of users by described at least two maincenter websites the visit of value-added service.
2. a WAN wide area network according to claim 1 also comprises at least one service node that operationally is coupled at least one described maincenter website.
3. WAN communication network according to claim 2, wherein said at least one service node comprises at least one in internet service node, long-distance telecommunications service node, local telephony service node and the video traffic node.
4. WAN communication network according to claim 1, at least one in wherein said at least two remote stations comprises:
Outdoor unit, described outdoor unit comprises the radio set that operationally is coupled to antenna;
A plurality of indoor units, described indoor unit operationally is coupled to a plurality of client devices; With
The apparatus interconnection link, described apparatus interconnection link is coupled to described a plurality of indoor unit to described outdoor unit, and described thus radio set is supported a plurality of described client devices.
5. a WAN communication network according to claim 4 also comprises the device that is used for using at described a plurality of client device statistical multiplexings described radio unit.
6. WAN communication network according to claim 4, wherein said indoor unit comprises:
Frame, described frame has the receiving device that is used for a plurality of Line cards; With
Line cards, described Line cards provide the interface of the service-specific between described frame and the client device.
7. WAN communication network according to claim 6, wherein said Line cards can be supported the additional indoor unit in the daisy chain structure.
8. WAN communication network according to claim 4, wherein said apparatus interconnection link is an optical fiber link.
9. WAN communication network according to claim 4, wherein said remote station is positioned at a multi-storey building, and on a plurality of floors of this dwelling house indoor unit is installed.
10. WAN communication network according to claim 1, at least one in wherein said at least two remote stations comprises an integrated unit that selected business is provided to client device.
11. a WAN communication network according to claim 1 wherein comprises multipoint broadband wireless system the more described of each described maincenter website:
First radio unit is with the first optional frequencies operations and provide covering in first sector;
Second radio unit, with the second optional frequencies operations and provide covering in second sector, described second sector is in fact adjacent with described first sector; With
Be used for selecting the device of the described first optional frequency and the described second optional frequency, make the described first and second optional frequencies in fact be isolated thereby that common-channel interference is dropped to is minimum from a plurality of usable frequency appropriate frequency.
12. WAN communication network according to claim 11, also comprise at least one the 3rd radio unit with the 3rd optional frequencies operations, described the 3rd radio unit provides further covering in one of described first and second sectors, described choice device is further selected the described the 3rd optional frequency, makes that described first, second are in fact different with the 3rd optional frequency.
13. a WAN communication network according to claim 11, wherein said network comprise a plurality of adjacent and non-conterminous sectors, and wherein said frequency selection device is reused described usable frequency on described non-conterminous sector.
14. a WAN communication network according to claim 1, each all supports a data transfer protocol based on packets of information wherein said communication trunk and described broadband wireless system.
15. a WAN communication network according to claim 14, wherein said transportation protocol based on packets of information is an asynchronous transfer mode.
16. a WAN communication network according to claim 14 wherein is used for main line the described transportation protocol based on packets of information of maincenter website communication is comprised asynchronous transfer mode and synchronous transfer mode.
17. WAN communication network according to claim 16, wherein said packets of information is to comprise that a letter stem is divided and the atm information bag of a pay(useful) load part, described letter stem branch comprises a QoS parameter, and wherein said network also comprises the device that is used for according to described QoS parameter distribution system bandwidth.
18. one kind is applicable to local metropolitan area, the local broadband of inserting of fixed broadband wireless telecommunications network is provided, and comprising:
A plurality of custom systems, wherein each described custom system comprises the user radio electric unit, described user radio electric unit is applicable to the frequencies operations corresponding to the residing mesh of described custom system sector, in the described custom system at least one has a plurality of relative clients end equipment, and comprises the device that is used for carrying out statistical multiplexing between described client device and described radio unit;
A plurality of maincenter websites, described maincenter website is by the main line interconnection based on Sonet, described maincenter website comprises a plurality of maincenter website radio units, described maincenter website radio unit is with optional frequencies operations, and at least one radio unit is corresponding to a mesh sector, described a plurality of maincenter website comprises the device that is used for dynamic assignment communication bandwidth between a plurality of users in each described mesh sector, and described a plurality of maincenter websites are by being the data encapsulation that sends betwixt that the atm information bag is communicated by letter with described at least one radio unit;
A plurality of value-added service nodes, described service node is coupled to described main line, and described user visits described value-added service node by described maincenter website and described main line; With
The central operation node, described central operation node is connected to each described maincenter website by a control net, and is applicable to the Long-distance Control that described maincenter website is provided and the Long-distance Control of the described service node of described user capture.
19. local metropolitan area, a broadband according to claim 18 communication network, wherein said a plurality of value-added service nodes comprise at least one in internet service node, long-distance telecommunications service node, local telephony service node and the video traffic node.
20. local metropolitan area, a broadband according to claim 18 communication network, among wherein said a plurality of users described at least one comprise:
Outdoor unit, described outdoor unit comprises the radio set that operationally is coupled to antenna;
A plurality of indoor units, described indoor unit operationally is coupled to a plurality of client devices; With
The apparatus interconnection link, described apparatus interconnection link is coupled to described a plurality of indoor unit to described outdoor unit, and described thus user radio electric unit is supported a plurality of described client devices.
21. local metropolitan area, a broadband according to claim 20 communication network, wherein said indoor unit also comprises:
Frame, described frame has the receiving device that is used for a plurality of Line cards; With
Line cards, described Line cards provide the interface of the service-specific between described frame and the client device.
22. local metropolitan area, a broadband according to claim 21 communication network, wherein said apparatus interconnection link is an optical fiber link.
23. local metropolitan area, a broadband according to claim 20 communication network, at least one among the wherein said user is positioned at a multi-storey building, and in described a plurality of indoor unit at least one is installed on a plurality of floors of this dwelling house.
24. local metropolitan area, a broadband according to claim 18 communication network, at least one among the wherein said user is the integrated subscriber unit that the business of a selection is provided to client device.
25. local metropolitan area, a broadband according to claim 18 communication network, wherein the described a plurality of maincenter radio units at each described maincenter website comprise:
The first sector radio unit provides covering with the first optional frequencies operations and in the first mesh sector;
The second sector radio unit provides covering with the second optional frequencies operations and in the second mesh sector, and described second sector is in fact adjacent with described first sector; With
Be used for selecting the device of the described first optional frequency and the described second optional frequency, make the described first and second optional frequencies in fact isolate thereby that common-channel interference is reduced to is minimum from a plurality of usable frequency appropriate frequency.
26. local metropolitan area, a broadband according to claim 25 communication network, wherein said a plurality of maincenter radio unit also comprises at least one the 3rd radio unit with the 3rd optional frequencies operations, described the 3rd radio unit provides further covering in one of described first and second sectors, the described device that is used to select is also selected the described the 3rd optional frequency, makes that described first, second are in fact different with the 3rd optional frequency.
27. local metropolitan area, a broadband according to claim 25 communication network, wherein said maincenter website covers a plurality of adjacent and non-conterminous sectors, and wherein said frequency selection device is reused described usable frequency on described non-conterminous sector.
28. local metropolitan area, a broadband according to claim 18 communication network, wherein said main line, each all supports data transfer protocol based on packets of information described user radio electric unit and described maincenter radio unit.
29. local metropolitan area, a broadband according to claim 28 communication network, wherein said transportation protocol based on packets of information is an asynchronous transfer mode.
30. local metropolitan area, a broadband according to claim 28 communication network wherein is used for the maincenter website the described transportation protocol based on packets of information of trunk communication is comprised asynchronous transfer mode and synchronous transfer mode.
31. local metropolitan area, a broadband according to claim 18 communication network, wherein said user radio electric unit and described maincenter radio unit use advanced modulation to transmit data on channel.
32. local metropolitan area, a broadband according to claim 31 communication network, wherein said advanced modulation is among 16QAM and the 64QAM.
33. local metropolitan area, a broadband according to claim 29 communication network, wherein said central operation node comprises and is used to collect about described user's the packets of information quality and the device of packets of information capacity data that described data are provided to charge system.
34. a broadband telecommunication network architecture comprises:
The first maincenter website provides broadband wireless communications to first group of a plurality of user in first district;
The deputy center website provides broadband wireless communications to second group of a plurality of user in second district;
Communication trunk, interconnect described first maincenter website and described deputy center website, thereby make between described second group of a plurality of user in described first group of a plurality of user and described second district in described first district and can communicate by letter.
35. a broadband telecommunication network architecture according to claim 34, wherein said broadband wireless communications comprises the point-to-point communication link.
36. a broadband telecommunication network architecture according to claim 34, wherein said broadband wireless communications comprises the point-to-multipoint communication link.
37. a broadband telecommunication network architecture according to claim 34 also comprises a plurality of value-added service nodes that are connected to described main line, described user is through the described service node of described maincenter site access.
38. one kind a maincenter and have between a plurality of users of a plurality of clients and on channel, operate a bit to multipoint system in obtain the method for the effective bandwidth that improves, may further comprise the steps:
Between described a plurality of users, dynamically distribute bandwidth;
Utilize advanced modulation on channel, to communicate by letter; With
Locate to use a plurality of clients' statistical multiplexing the user.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US5025297P | 1997-06-19 | 1997-06-19 | |
| US60/050,252 | 1997-06-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1267416A CN1267416A (en) | 2000-09-20 |
| CN1152518C true CN1152518C (en) | 2004-06-02 |
Family
ID=21964213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB988082292A Expired - Fee Related CN1152518C (en) | 1997-06-19 | 1998-06-19 | Metropolitan wide area network |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0990329A1 (en) |
| JP (1) | JP2002507350A (en) |
| KR (1) | KR20010020470A (en) |
| CN (1) | CN1152518C (en) |
| AU (1) | AU8157398A (en) |
| BR (1) | BR9810068A (en) |
| CA (1) | CA2294452C (en) |
| HK (1) | HK1027925A1 (en) |
| HU (1) | HUP0003860A2 (en) |
| WO (1) | WO1998058477A1 (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI112567B (en) * | 1998-10-23 | 2003-12-15 | Nokia Corp | Radio link system terminal synchronization |
| SE9901538L (en) * | 1999-04-29 | 2000-10-30 | Ericsson Telefon Ab L M | Radio communication systems |
| DE19964486B4 (en) * | 1999-09-03 | 2013-11-07 | Teles Ag Informationstechnologien | Provision of additional services in subscriber line by integrating communication via circuit switching networks and packet switching networks |
| EP1901464A3 (en) * | 1999-10-22 | 2008-04-23 | Nextnet Wireless Inc. | System and method for automatic CPE registration in a wireless communication network |
| SE0003440D0 (en) * | 2000-09-26 | 2000-09-26 | Landala Naet Ab | Communication system |
| US20030036375A1 (en) * | 2001-08-17 | 2003-02-20 | Weijing Chen | Public wireless local area network |
| KR100684943B1 (en) | 2003-09-16 | 2007-02-22 | (주) 콘텔라 | System and method for providing a centralized wireless office network |
| WO2005027424A1 (en) * | 2003-09-16 | 2005-03-24 | Contela, Inc. | System and method for providing a centralized wireless office network |
| WO2006075368A1 (en) * | 2005-01-13 | 2006-07-20 | Fujitsu Limited | Communication system, communication apparatus and communication method |
| US7844273B2 (en) * | 2006-07-14 | 2010-11-30 | Lgc Wireless, Inc. | System for and method of for providing dedicated capacity in a cellular network |
| US11342791B2 (en) | 2009-12-22 | 2022-05-24 | View, Inc. | Wirelessly powered and powering electrochromic windows |
| US20130271813A1 (en) | 2012-04-17 | 2013-10-17 | View, Inc. | Controller for optically-switchable windows |
| US11732527B2 (en) | 2009-12-22 | 2023-08-22 | View, Inc. | Wirelessly powered and powering electrochromic windows |
| US11630366B2 (en) | 2009-12-22 | 2023-04-18 | View, Inc. | Window antennas for emitting radio frequency signals |
| US11205926B2 (en) | 2009-12-22 | 2021-12-21 | View, Inc. | Window antennas for emitting radio frequency signals |
| US11300848B2 (en) | 2015-10-06 | 2022-04-12 | View, Inc. | Controllers for optically-switchable devices |
| CN112627704A (en) | 2014-03-05 | 2021-04-09 | 唯景公司 | Monitoring a site containing a switchable optical device and a controller |
| WO2020227702A2 (en) | 2019-05-09 | 2020-11-12 | View, Inc. | Antenna systems for controlled coverage in buildings |
| US11054711B2 (en) | 2014-11-25 | 2021-07-06 | View, Inc. | Electromagnetic-shielding electrochromic windows |
| CN107112620B (en) * | 2014-11-25 | 2019-12-31 | 唯景公司 | Window antenna |
| US11114742B2 (en) | 2014-11-25 | 2021-09-07 | View, Inc. | Window antennas |
| TW202206925A (en) | 2020-03-26 | 2022-02-16 | 美商視野公司 | Access and messaging in a multi client network |
| US11631493B2 (en) | 2020-05-27 | 2023-04-18 | View Operating Corporation | Systems and methods for managing building wellness |
| US12058539B2 (en) | 2022-01-14 | 2024-08-06 | T-Mobile Usa, Inc. | Dynamic telecommunications network outage recovery based on predictive models |
| US11765052B1 (en) | 2022-03-11 | 2023-09-19 | T-Mobile Usa, Inc. | User equipment hosting for customizable 5G services |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4144496A (en) * | 1976-03-17 | 1979-03-13 | Harris Corporation | Mobile communication system and method employing frequency reuse within a geographical service area |
| AU2117595A (en) * | 1994-03-17 | 1995-10-03 | Endlink, Inc. | Sectorized multi-function cellular radio communication system |
| US5592470A (en) * | 1994-12-21 | 1997-01-07 | At&T | Broadband wireless system and network architecture providing broadband/narrowband service with optimal static and dynamic bandwidth/channel allocation |
| US5648969A (en) * | 1995-02-13 | 1997-07-15 | Netro Corporation | Reliable ATM microwave link and network |
| US5638371A (en) * | 1995-06-27 | 1997-06-10 | Nec Usa, Inc. | Multiservices medium access control protocol for wireless ATM system |
-
1998
- 1998-06-19 KR KR1019997012080A patent/KR20010020470A/en not_active Application Discontinuation
- 1998-06-19 BR BR9810068-8A patent/BR9810068A/en not_active Application Discontinuation
- 1998-06-19 CN CNB988082292A patent/CN1152518C/en not_active Expired - Fee Related
- 1998-06-19 CA CA002294452A patent/CA2294452C/en not_active Expired - Fee Related
- 1998-06-19 WO PCT/US1998/012888 patent/WO1998058477A1/en not_active Application Discontinuation
- 1998-06-19 JP JP50490399A patent/JP2002507350A/en not_active Ceased
- 1998-06-19 AU AU81573/98A patent/AU8157398A/en not_active Abandoned
- 1998-06-19 EP EP98931440A patent/EP0990329A1/en not_active Withdrawn
- 1998-06-19 HU HU0003860A patent/HUP0003860A2/en unknown
-
2000
- 2000-10-26 HK HK00106835A patent/HK1027925A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR9810068A (en) | 2001-10-16 |
| EP0990329A1 (en) | 2000-04-05 |
| HK1027925A1 (en) | 2001-01-23 |
| CA2294452A1 (en) | 1998-12-23 |
| JP2002507350A (en) | 2002-03-05 |
| CA2294452C (en) | 2004-10-19 |
| AU8157398A (en) | 1999-01-04 |
| HUP0003860A2 (en) | 2001-02-28 |
| CN1267416A (en) | 2000-09-20 |
| WO1998058477A1 (en) | 1998-12-23 |
| KR20010020470A (en) | 2001-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1152518C (en) | Metropolitan wide area network | |
| US6865170B1 (en) | Metropolitan wide area network | |
| US6757268B1 (en) | Metropolitan wide area network | |
| US6628627B1 (en) | Wireless system for providing symmetrical, bidirectional broadband telecommunications and multimedia services employing a computer-controlled radio system | |
| US6778517B1 (en) | Wireless broadband service | |
| US6577621B1 (en) | System and method for providing high-speed local telecommunications access | |
| Harrington | Voice/data integration using circuit switched networks | |
| CN1101096C (en) | Metropolitan wide area network | |
| Hrasnica et al. | Powerline Communications For Access Networks | |
| CZ2000553A3 (en) | Long-distance network | |
| MXPA00000020A (en) | Metropolitan wide area network | |
| Gerla et al. | Moving bits by air, land and sea: carriers, vans and packets | |
| MXPA00000638A (en) | Metropolitan wide area network | |
| CZ2000253A3 (en) | Wideband local metropolitan telecommunication network | |
| Chan et al. | Transport method to integrate multimedia and data personal communications services over MAN-based PCNS | |
| Shiokawa et al. | Bandwidth allocation for wireless ATM considering priorities of component calls | |
| Park et al. | A study on the effective interconnection method between base stations and selector bank subsystem in CDMA cellular voice/data integrated networks | |
| CZ200076A3 (en) | Multipurpose subscriber radio unit, communication system and circumferential plate for personal computer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040602 Termination date: 20150619 |
|
| EXPY | Termination of patent right or utility model |