CN1543730A - A multi-network mobile communication system - Google Patents

A multi-network mobile communication system Download PDF

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Publication number
CN1543730A
CN1543730A CNA028108817A CN02810881A CN1543730A CN 1543730 A CN1543730 A CN 1543730A CN A028108817 A CNA028108817 A CN A028108817A CN 02810881 A CN02810881 A CN 02810881A CN 1543730 A CN1543730 A CN 1543730A
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China
Prior art keywords
network
communication
intelligent
management entity
data
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CNA028108817A
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Chinese (zh)
Inventor
K・拉马斯瓦米
K·拉马斯瓦米
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Thomson Licensing SAS
RCA Licensing Corp
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RCA Licensing Corp
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Publication of CN1543730A publication Critical patent/CN1543730A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • 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
    • 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
    • H04L12/5691—Access to open networks; Ingress point selection, e.g. ISP selection
    • H04L12/5692—Selection among different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A communication system for communicating via the Internet, includes a portable communications device, and a plurality of networks interconnecting, at least occasionally, the internet with the portable communications device. An intelligent content server is also interconnected to the Internet. A network management entity, is interconnected to the intelligent content server, and chooses which network is to be used for communicating between the intelligent content server and the portable communications device.

Description

Many networks mobile communication system
Technical field
Present invention relates in general to mobile communication platform, more specifically, the present invention relates to the communication optimization that uses intelligent network to select.
Background technology
The Mobile or cellular telephone device is configured to and a plurality of antenna communications based on ground or satellite that finally are connected to traditional telephone system.No matter all there is a direct link between cell phone and the telephone system communications network in the concrete path of using.The digital cellular telephone device can also be to the Digital Data Net transmission data as the Internet of telephone system interconnection and from the Digital Data Net receiving digital data.This device is called as PCS Personal Communications System (PCS) device.The information as map, Email, text, webpage, Voice ﹠ Video file from the Internet can be asked, receives and be shown to this in-dash computer S device.
A problem relevant with this enhanced functional is the needed bandwidth of this mass data of transmission.All there is the problem of distributing in many existing data communication networks about the poor efficiency of the scheduling of transfer of data and Route Selection and data transmission capacity.For example, the worldwide interconnection that is called the computer network of the Internet is carried out Route Selection for packet, and the expectation grouping finally is distributed to predetermined receiver, but packet loss or delay in transmission course are not rare.In addition, the Internet is not distinguished between the dissimilar data that are transmitted.
The packet as real-time audio or video communication that need send in a definite time frame is not subjected to being higher than the preference of the grouping as the Email that does not need the special time sent usually in transmission.The packet that wherein can't stand packet loss of carrying important information can not get being higher than the priority of other packet.Because aspect allocation of transmission resources, all packets all are counted as of equal importance, so the more not critical transmission as the Email can postpone or replace more important and data time-sensitive.
Data transmission capacity in the available data communication network is distributed by less efficiently usually.In some cases, give a specific user according to a fixing dispatch list or particular network structure with transmission capacity or allocated bandwidth, but in fact available bandwidth is not used.In other cases, the user is prevented from sending one and is surpassing the data character group of user's allocated bandwidth at that time.Existing data communication network usually lacks the mechanism of bandwidth on demand of being used for.
The current cellular telephone system is used the relative low bandwidth signaling technology of about per second 50 kilobits.Graphical information such as map and picture needs relative wide bandwidth so that obtain the rational response time.Video and audio file are for the appropriate responsive time even need higher bandwidth.Under the situation of limited frequency spectrum resources, the bandwidth cost on the network of a relative arrowband will be very high.
Current TV signal broadcast system provides the wide relatively bandwidth ability of about per second 20 megabits for the wide television channel of each six megahertz.Comprise the almost usable spectrum of 400 megahertzes at the land of U.S. frequency band.Communication channel has about 70 miles the reception radius that mainly depends on local landform usually.
The Direct Digital satellite TV broadcast system can also be provided for the digital channel of digital information transmission.Be presented to the U.S. Patent No. 6 that is entitled as " allocated bandwidth and bandwidth on-demand (PRIORITYBASED BANDWIDTH ALLOCATION AND BANDWIDTH ON DEMAND IN A LOWEARTH ORBIT SATELLITE DATA COMMUNICATIONS NETWORK) in the low earth-orbit satellite data communication network " of Montpetit based on priority on April 2nd, 2002, an example of this system is disclosed in 366,761.The numerical data that receives on the very wide zone of several ten thousand sq. mi from described channel can generally included.These channels are not used fully.Therefore, there are a large amount of untapped television broadcasting frequency spectrums to have other purposes.
Certain data by the user of PCS device request have only this user just to have, and for example only are addressed to this user's Email.Other data are simultaneously interested for a large number of users, for example weather data or stock market quotation.Out of Memory is general simultaneously interested at special time only, for example at IRS's tax forms in second week of April.The Internet and relevant IP agreement are supposed to allow the demand for the growth of data.Can set up the network connectivity by the whole bag of tricks, these methods comprise: be connected to a broadband modem (cable, DSL or satellite) or be connected to such as (nomadic) network or be connected to mobile network of moving about that is provided by the WLAN standard by wired or wireless device.The current bandwidth that is used for honeycomb telephone device only enough provides requested information for a specific PCS device, if and the user that all available bandwidths are not increased quantity exhausts, then must find more efficient methods to come to be the appropriate network of the bandwidth access that in fact needs.
In an independent network, being required and being connected to this network so that obtain the mechanism or the agreement of some business is to utilize the simple problem of known solution.But in the time must walking between different networks, the problem of carrying out seamless transfer is exactly important.For example, in second generation cellular network, may on the basis of each session, be connected to a different network usually.
Unfortunately, the possibility of optimizing bandwidth on the grouping rank can't obtain, and this is because the mechanism that communicates by network does not have public protocol layer.In the Internet, the agreement of public use is known as IPv4, and it has one group of instrument that makes it possible to carry out mobile management.These group agreements are known as mobile IP protocol.Several enhancings for the IPv4 agreement have brought the second generation that is called IPv6.Except 128 expanded address spaces of 32 that replace using, also have several features that make it possible to carry out better mobile management by IPv4.Can manage mobility by using the static IP addressing scenario among the IPv6.In IPv4, because the deficiency of address space is used dynamically and the local ip address distribution usually.The efficient that is expected at the address administration among the IPv6 can be better, thereby bring better service on the whole.The U.S. Patent No. 6 that is entitled as " mobile node, mobile agent and network system (MOBILE NODE; MOBILE AGENT AND NETWORK SYSTEM) " that is presented to people such as Watanuki in January 9 calendar year 2001, an example that uses the mobile system of IPv6 is disclosed in 172,986.
The data that the user asked may be pressed for time want character and need under the situation of strict time restriction, send.Alternatively, data also can be downloaded under the situation of more undemanding time restriction.The former requirement need be by service quality (QoS) restriction of network support.The latter is the typical download model of internet content and is known as best endeavors and sends.At last, data also can be sent under free situation about postponing.These examples comprise music or the multimedia of browsing after the user wishes.This classification representative is by the network optimization and use the maximum flexibility that viewpoint provided.
Under the situation that above-mentioned many networks, bandwidth and access variable exist, need a kind of mechanism, the bandwidth, message priority and the bandwidth that are used for based on needs become the original user of permission seamless roam or switching between these networks, so that the bandwidth of always selecting the minimum of least cost to need.
Summary of the invention
According to principle of the present invention, be used for communication system via internet communication comprise a portable communication appts and a plurality of when having at least with the network of the Internet and portable communication appts interconnection.An intelligent also is interconnected to the Internet.A network management entity is interconnected to intelligent, and selects which network to be used to communicate by letter between intelligent and portable communication appts.
In this communication system, solve by selecting the effective available bandwidth of cost to optimize the problem of network selecting by portable communication appts being embodied as the many network platforms of portable intelligent.This platform comprises a plurality of headend equipment interfaces, and each interface is corresponding to one type available network, such as local network interface, radio network interface, network interface and mobile network's interface move about.Local network interface is inserted into a broadband modem usually, and other interface uses an antenna terminal to carry out radio communication.
In described platform, each network interface is interconnected to the network data processing layer that can transmit and receive data via IPv4 or IPv6 agreement.For the big file that needs massive band width as the multimedia application, the network data processing layer is interconnected to discrete backend application processor, this processor processing and a data cached stream.
Each network interface sends data or therefrom receives data to the base station or the network terminal that is exclusively used in described particular type of network.Base station that each is such or terminal and then have an appropriate connection to the Internet.The intelligent that is interconnected to network management entity also is connected to the Internet.For the many network platforms of intelligent and portable intelligent are communicated by letter, this platform is registered in the available network any one by any physical layer with a Return Channel.
Described platform can utilize existing mobile IPv 4 agreement to come work or can use static IPv6 whole world addressing scheme.Described platform is communicated by letter with intelligent and IP address that it is current and current specific many network connecting functions thereof are notified to described server.Intelligent network management entity is based on selecting appropriate network to be used for each grouping that will be sent out or receive as the transmission quality of priority, hope, bandwidth and the optimisation criteria the cost that needs.
When portable stage (usually since physically the scope layman of current network and then) when leaving the current network that it is worked therein, this portable stage is searched for automatically and is attempted to be connected to the next one (based on optimisation criteria) optimum network.When a new connection is successfully realized, described portable stage will send to network management entity about the information of its current connection.In response to this information, the intelligent network management entity carries out Route Selection by newer optimum network route for grouping subsequently.This process can be managed on the rank of each grouping or each session.
Description of drawings
Block representation among Fig. 1 is portable communications network selecting optimization system in accordance with the principles of the present invention; And
Block representation among Fig. 2 is the PCS Personal Communications System device in accordance with the principles of the present invention, and it can be used in the system shown in Figure 1.
Embodiment
Mobile communication system of block representation among Fig. 1, it comprise can via antenna 122,126 and 128 and broadband modem 12 or a plurality of wireless communication networks in any one carry out many networks portable stage 10 of two-way transmission and reception.In fact, antenna 122,126 and 128 can be to have the independent physical antenna of appropriate pair net or the one or more antennas near physical proximity.For example, antenna 122 is in response to the digital cellular telephone signal from for example cell phone mobile network terminal or base station 22.Antenna 122 bidirectional coupled are to mobile interface circuit 120.
Can also see that from Fig. 2 mobile interface circuit 120 is coupled to the immediate data input of microprocessor 118.An immediate data input of microprocessor (μ p) 118 is coupled to the input of mobile interface 120.The audio output of microprocessor 118 is coupled to the input of loud speaker 114.The output of microphone 112 is coupled to the audio input end of microprocessor 118.An output of auxiliary keyboard 116 is coupled to a control input end of microprocessor 118.
Under the control of the application program of microprocessor in being stored in the read-only memory (ROM) of picture in the microprocessor 118 according to known way work.Especially, microprocessor is programmed and is used as using the data analysis layer 130 of current internet protocol version 4 (IPv4) and Next Generation Internet protocol edition 6 (IPv6) still under development to operate.Layer 130 can comprise service quality (QoS) program that well known to a person skilled in the art.
Microprocessor 118 also comprises the backend application processor 14 that can carry out two-way communication with internet protocol layer 130.Processor 14 is as the buffer and the decoder of the data that received by microprocessor 118, and it is particularly useful to have the data of the content of multimedia as the Voice ﹠ Video file for processing.Back-end processor 14 also can be microprocessor 118 outsides but still be mounted in the combination of the integrated circuit on many networks portable stage 10 or discrete circuit.
Aforesaid platform 10 is operated in known manner, allows the user to carry out call.The user operates button on the auxiliary keyboard 116 and indicates microprocessor 118 to impel mobile interface circuit 120 to be connected to the extranets as the Internet 30 or be connected to mobile telephone communications network via mobile base station 22.Auxiliary keyboard 116 produces the telephone number of regulation hope or the dialing tone of command code.Alternatively, can be from the Internet 30 or receive the expression someone just at the signal of call try portable stage 10 from cellular radio network.In response to these signals, the mobile interface circuit 120 of microprocessor 118 dominations is connected to network and finishes calling.
In any one incident, all carry out digitlization for expression from the signal of the spoken message of microphone 112, and digitized signal is sent to mobile network base station 22 by mobile interface 120 and antenna 122 by microprocessor 118.Simultaneously, 22 that receive and expressions are received by mobile interface 120 from the signal of the opposing party's received digitized speech information from the base station by antenna 122, are converted into voice signal and are offered loud speaker 114 by microprocessor 118.
As mentioned above, many network platforms 10 also provide usually via the Internet to the computer solicited message with receive the ability of information from this computer.Can produce the data of the requested information of expression by the user from auxiliary keyboard 116 with a plurality of buttons as shown in Figure 2.Microprocessor 118 is provided in the network interface available on the network platform 10 any one with information request.For example, platform 10 can not only comprise mobile interface 120, can also comprise local network interface 110, network interface 16 and radio network interface 18 move about.According to which network can obtain to use, information request is sent to any one in broadband modem 12 or antenna 122,126 or 128.
No matter at special time network in use, information request all is sent to the Internet 30.Common layer 130 also provides the status report about which the just relative network service at present in network interface 16,18,110 and 120.In these networks each has the specific characteristic relevant with its particular network path.These features comprise that the geography of q﹠r, the network of the bandwidth of network path, the monetary cost of using network, available data transmission bauds, network covers and is suitable for data type via the particular network path transmission most.By sending the current field (universe) of network availability, the recipient just can select the most appropriate network to send return data.
The information that is sent to the Internet 30 by platform 10 receives via the server machine of the user's desired information that contains portable stage 10 as intelligent 27.What be interconnected to content server 27 is the network management entity 26 that receives network availability or status report from platform 10.Management entity 26 is programmed to be optimized for network selection, and via this network, its relevant content server 27 sends data to platform 10 and receives data from platform 10.
Existence sends two kinds of patterns of the information of wishing from server 27.First kind of pattern is that wherein data in server is only pointed to the unicast mode of specific user's platform 10.Second kind of possible pattern is the predetermined multicast pattern that sends to a plurality of platforms 10 simultaneously of data in server wherein.
Under any circumstance, the purpose of server 27 all is " edge " 31 that trunk or the internal structure of data by the Internet 30 is routed to its www worldwide web, and continue from the edge 31 data are sent to platform 10 by the communication access net of selecting 20,21,22 and/or 25, thereby with P the platform 10 that divides into groups to be sent to.
Optimize it for network management entity 26 and select a particular network from the available network territory, the target of unicast mode is to minimize expression formula:
Minimize j [ P j Σ i ( ( x i + y i ) N i ) ] Σ j P j = P Condition under
Wherein
X iIt is the cost that each packet is sent to its edge 31 by the Internet 30 for i bar tie-in line;
y iBe that each is divided into groups to pass through corresponding Access Network, for example costs of 20,21,22,25 transmission;
P jBe the quantity of the grouping that on link i, transmits; And
N iIt is the number of users on the i bar link of the content of request server 27.
Unicast expression can be an optimization problem of using standard optimization techniques by solution, and it will bring reduction just to transmit the cost of each grouping by the Internet 30 and the communication network 20,21,22 or 25 by the back by whole network.In order to realize service quality, the previous cost structure x that uses for each section iAnd y iReacted rightly and optimization problem is utilized new quantity and solves.
For the situation of multicast, target is to minimize following expression formula:
Minimize j [ P j Σ j ( x i + y i ) ] Σ j P j = P Condition under
This expression formula is identical with unicast mode, except for request server content (N i) the loss that takes place of multi-user be eliminated outside.This expression formula can also be used well-known optimisation technique and optimize.Each optimization can be carried out on the basis of each grouping or each session.

Claims (20)

1. communication system that is used for via internet communication comprises:
A portable communication appts;
A plurality of networks when each network has at least interconnect the Internet and portable communication appts;
An intelligent, this content server is interconnected to the Internet; And
A network management entity, this network management entity is interconnected to intelligent, and which network is network management entity select be used to communicate between intelligent and portable communication appts.
2. communication system according to claim 1, wherein portable communication appts comprises a plurality of each network interfaces of communication link that are used for setting up respectively with a plurality of networks.
3. communication system according to claim 2, wherein portable communication appts comprises that also one is programmed any one of coming via network interface and comes the processor of deal with data.
4. communication system according to claim 3, wherein network management entity is programmed and selects to be used for the network of communicating by letter with mancarried device based on each the available bandwidth in a plurality of networks.
5. communication system according to claim 4, wherein when selecting to be used for network that portable communication appts is communicated by letter, the cost that the network management entity assessment is associated with each network.
6. communication system according to claim 5, wherein when selecting to be used for network that portable communication appts is communicated by letter, the transmission quality value that the network management entity assessment is associated with each network.
7. communication system according to claim 6, wherein network management entity is used for the network of communicating by letter with portable communication appts for assessing in each packet of transmitting between intelligent and the portable communication appts.
8. communication system according to claim 6, wherein network management entity is assessed for each data transmission conversation and is used for the network of communicating by letter with portable communication appts.
9. communication system according to claim 8, wherein microprocessor is programmed by using a public the Internet protocol layer all information to be sent to each network interface and receive all information from each network interface.
10. communication system according to claim 9, wherein microprocessor is programmed:
Determine that in a plurality of networks which moves;
With expression which in a plurality of networks is that the information of operation sends to network management entity.
11. a data transfer optimization system that uses in multi-network environment comprises:
An intelligent content source (27);
An intelligent network management entity (26) that is interconnected to the intelligent content source;
The many network platforms (10) that are interconnected to a plurality of communication networks, these many network platforms send to the intelligent management entity with a communication network status report, communication network (20,21 of intelligent management entity selection, 22,25) be used for data are sent to many network platforms from the intelligent content source.
12. data transfer optimization according to claim 11 system, wherein the intelligent management entity is selected in the communication network one based on comprising as the optimized Algorithm of the network bandwidth of a variable.
13. data transfer optimization according to claim 11 system, wherein the optimized Algorithm assessment is as the network cost of the transfer of data of a variable.
14. data transfer optimization according to claim 11 system, wherein the optimized Algorithm assessment is as the network quality of the transfer of data of a variable.
15. data transfer optimization according to claim 11 system, wherein the intelligent management entity is selected in the communication network one for the data transmission conversation of each and many network platforms.
16. data transfer optimization according to claim 11 system, wherein the intelligent management entity is selected in the communication network one for each packet that sends to many network platforms.
17. select to optimize the method for the transfer of data between portable stage and the intelligent by optimizing communication network in the multi-network environment for one kind, comprise step:
Determine which communication network is connected to portable stage;
The communication network status report is sent to intelligent;
Impel a network management entity assessment to be connected to the feature of the communication network of portable stage; And
Impel network management entity to select a communication network based on the feature of assessment; And
Selected communication network sends to portable stage with data from intelligent.
18. method according to claim 17 also is included as the step that each data transmission conversation is assessed the feature of communication network.
19. method according to claim 17 also is included as the step that the feature of communication network is assessed in each packet that will be transmitted.
20. method according to claim 17, wherein data are come to send to portable stage from intelligent via a public the Internet protocol layer.
CNA028108817A 2001-05-30 2002-05-20 A multi-network mobile communication system Pending CN1543730A (en)

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US60/294,402 2001-05-30

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AU (1) AU2002303776A1 (en)
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WO2002098057A8 (en) 2004-05-21
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MXPA03010868A (en) 2004-02-17
WO2002098057A3 (en) 2003-09-25
CA2447919A1 (en) 2002-12-05
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WO2002098057A2 (en) 2002-12-05
KR20040002967A (en) 2004-01-07

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