Radio network communication system

• US 6,763,248 B1
• Filed: 11/21/2000
• Issued: 07/13/2004
• Est. Priority Date: 11/26/1999
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Odamura, Satoshi
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): Gantt, Alan T.
• Application Number:
  US09/717,885
• Time in Patent Office: 1,330 Days
• Field of Search: 455/557, 455/433, 455/553, 455/522, 455/453, 709/216, 709/217, 709/218, 709/223, 709/206, 709/225, 718/105
• US Class Current: 455/557
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/263 Rate modification at the source after receiving feedback
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]
• CPC Class Codes: H04L 67/564 Enhancement of application control based on intercepted application data
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching
• CPC Class Codes: H04L 67/62 Establishing a time schedule for servicing the requests
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 28/0231 based on communication conditions dynamic wireless traffic scheduling definition based on channel quality criteria H04W72/54
• CPC Class Codes: H04W 28/0284 detecting congestion or overload during communication monitoring arrangements H04L43/00
• CPC Class Codes: H04W 28/0289 Congestion control load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/08 Load balancing or load distribution transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/20 Transfer of user or subscriber data
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 92/10 : between terminal device and access point, i.e. wireless air interface

Abstract

A radio network communication system includes (a) at least one server storing files therein, (b) at least one client terminal making a request to download a desired file thereto among the files stored in the server, and (c) at least one base station. The base station includes (c1) a data transceiver which makes radio-communication with the client terminal to receive data from and transmit data to the client terminal, and which, when the request is made by the client terminal, transmits the request to the server and receives all data constituting the desired file, from the server, and (c2) a load measurement unit which measures a network load between the client terminal and the base station. The base station divides the received file into sub-files in accordance with the load measured by the load measurement unit, and transmits each of the sub-files to the client terminal.

Claims

1. A radio network communication system comprising:

(a) at least one server storing files therein;

(b) at least one client terminal making a request to download a desired file thereto among said files stored in said server; and

(c) at least one base station including;

(c1) a data transceiver which makes radio-communication with said client terminal to receive data from and transmit data to said client terminal, and which, when said request is made by said client terminal, transmits said request to said server and receives all data constituting said desired file, from said server; and

(c2) a load measurement unit which measures a network load between said client terminal and said base station,

said base station dividing the received file into sub-files in accordance with said load measured by said load measurement unit, and transmitting each of said sub-files to said client terminal.

5. The radio network communication system as set forth in claim 1, wherein said base station transmits the received files to said client terminal at a time, when said network load measured by said load measurement unit is equal to or smaller than a threshold load.

2. A radio network communication system comprising:

(a) at least one server storing therein files each constituting a homepage, said files being stored in association with a uniform resource locator (URL) indicating a site of said homepage in an internet;

(b) at least one client terminal making a request to download a desired file thereto among said files stored in said server, by indicating a uniform resource locator of said desired file; and

(c) at least one base station including;

(c1) a data transceiver which makes radio-communication with said client terminal to receive data from and transmit data to said client terminal, and which, when said request is made by said client terminal, transmits said request to said server and receives all data constituting said desired file, from said server; and

(c2) a load measurement unit which measures a network load between said client terminal and said base station,

said base station dividing the received file into sub-files in accordance with said load measured by said load measurement unit, and transmitting each of said sub-files to said client terminal.

3. The radio network communication system as set forth in claim 2, wherein said files are described in a descriptive language in which a homepage should be described, and wherein said base station further includes:

(c3) a database storing therein data about a range in which a display unit of said client terminal can display data at a time;

(c4) a divider which divides the received file into sub-files in the unit of a page; and

(c5) an editor which edits said sub-files such that a descriptive language in each of said sub-files properly forms a page.

4. The radio network communication system as set forth in claim 3, wherein said base station further includes a transmitter which transmits said sub-files to said client terminal by pages applicable to a client terminal, in accordance with said network load measured by said load measurement unit.

6. The radio network communication system as set forth in claim 3, wherein said client terminal includes:

(b1) a detector which detects a request to display new pages on a display unit; and

(b2) a transmitter which transmits said request to said base station.

7. A radio network communication system comprising:

(a) an internet network;

(b) first to N-th servers each storing homepages therein and each being in communication with said internet network, wherein N is an integer equal to or greater than 2;

(c) first to M-th base stations each being in communication with said internet network, wherein M is an integer equal to or greater than 2, each of said first to M-th base stations including a memory to store data received from said servers therein;

(d) client terminals each of which is accessible to said internet network through one of said base stations,

each of said first to M-th base stations, on receiving a request from one of said client terminals to download a desired homepage to said one of said client terminals, receiving data from the associated server, and storing the thus received data in said memory,

each of said first to M-th base stations calculating a load between itself and said one of said client terminals, and transmitting said data to said one of said client terminals by pages in accordance with said load.

8. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) said client terminal making a request to download a desired file thereto among said files stored in said server;

(b) said base station receiving all data constituting said desired file, from said server;

(c) calculating a network load between said client terminal and said base station;

(d) said base station dividing the received file into sub-files in accordance with said load calculated in said step (c); and

(e) said base station transmitting each of said sub-files to said client terminal.

9. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) said client terminal making a request to download a desired file thereto among said files stored in said server, by indicating a uniform resource locator (URL) of said desired file;

(b) said base station receiving all data constituting said desired file, from said server which stores files each constituting a homepage, said files being stored in association with a uniform resource locator (URL) indicating a site of said homepage in an internet;

(c) calculating a network load between said client terminal and said base station;

(d) said base station dividing the received file into sub-files in accordance with said load calculated in said step (c); and

(e) said base station transmitting each of said sub-files to said client terminal.

10. The method as set forth in claim 9, wherein said files are described in a descriptive language in which a homepage should be described, and said method further including the steps of:

said base station storing therein data about a range in which a display unit of said client terminal can display data at a time;

said base station dividing the received file into sub-files in the unit of a page; and

said base station editing said sub-files such that a descriptive language in each of said sub-files properly forms a page.

11. The method as set forth in claim 10, further including the step of said base station transmitting said sub-files to said client terminal by pages applicable to a client terminal, in accordance with said network load calculated in said step (c).

12. The method as set forth in claim 9, wherein said base station transmitting the received files to said client terminal at a time, when said network load is equal to or smaller than a threshold load.

13. The method as set forth in claim 10, further including the step of said client terminal detecting a request to display new pages on a display unit;

and transmitting said request to said base station.

14. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load between said base station and said client terminal;

(e) calculating an amount of data transmittable to said client terminal, in accordance with said load;

(f) comparing said data calculated in said step (e) to said data stored in said memory in said step (c); and

(g) said base station transmitting said data to said client terminal, if an excessive load is not exerted on an internet network even if said data stored in said memory is transmitted to said client terminal at a time.

15. The method as set forth in claim 14, further comprising the step of determining the number of pages transmittable to said client terminal at a time,

said base station transmitting said pages to said client terminal in said step (g).

16. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load between said base station and said client terminal;

(e) calculating an amount of data transmittable to said client terminal, in accordance with said load;

(f) comparing said data calculated in said step (e) to said data stored in said memory in said step (c);

(g) said base station editing a first page in accordance with a capacity at which said client terminal can display data at a time on a display unit thereof, if said data stored in said memory in said step (c) is greater in an amount than said data calculated in said step (e); and

(h) said base station transmitting said first page to said client terminal.

17. The method as set forth in claim 16, further comprising the steps of:

(h) editing a second and later pages on receipt of a request from said client terminal; and

(i) said base station transmitting the thus edited second or later pages to said client terminal.

18. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load between said base station and said client terminal;

(e) calculating an amount of data transmittable to said client terminal, in accordance with said load;

(f) comparing said data calculated in said step (e) to said data stored in said memory in said step (c);

(g) said base station editing a first page in accordance with a capacity at which said client terminal can display data at a time on a display unit thereof, if said data stored in said memory in said step (c) is greater in an amount than said data calculated in said step (e);

(h) said base station transmitting said first page to said client terminal;

(i) repeating said steps (d) to (f), when said client terminal requests said base station to transmit said client terminal data for next pages; and

(j) said base station transmitting said data for next pages to said client terminal, if an excessive load is not exerted on an internet network even if said data for next pages is transmitted to said client terminal at a time.

19. The method as set forth in claim 18, further comprising the step of determining the number of pages transmittable to said client terminal at a time,

said base station transmitting said pages to said client terminal in said step (j).

20. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load Dmax per a channel between said base station and said client terminal;

(e) said base station calculating an allowable load per a client terminal at said channel;

(f) said base station comparing Dk to the number of pages N of a homepage which said client terminal requests to download therein, wherein Dk is defined as follows;

21. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load Dmax per a channel between said base station and said client terminal;

(e) said base station calculating an allowable load per a client terminal at said channel;

(f) said base station comparing Dk to the number of pages N of a homepage which said client terminal requests to download therein, wherein Dk is defined as follows;

22. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load Dmax per a channel between said base station and said client terminal;

(e) said base station calculating an allowable load per a client terminal at said channel;

(f) said base station comparing Dk to the number of pages N of a homepage which said client terminal requests to download therein, wherein Dk is defined as follows;

23. A method of downloading data to a client terminal in a radio network communication system including at least one server, at least one client terminal and at least one base station, comprising the steps of:

(a) a user of said client terminal making a request to access to a homepage;

(b) said server transmitting data to said base station in accordance with said request;

(c) said base station storing said data in a memory;

(d) said base station calculating a network load Dmax per a channel between said base station and said client terminal;

(e) said base station calculating an allowable load per a client terminal at said channel;

(f) said base station comparing Dk to the number of pages N of a homepage which said client terminal requests to download therein, wherein Dk is defined as follows;

 

Dk=Dmax/K

 

wherein K indicates the number of client terminals concurrently making access to a homepage; and

(g) said base station transmitting data of said homepage by every one page to said client terminal, if Dk is smaller than 1.