Data transmission method using the number of stations joined multicast service, base station and terminal device therefor, and wireless communication system having the same

• US 7,944,835 B2
• Filed: 07/30/2007
• Issued: 05/17/2011
• Est. Priority Date: 02/06/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ahn, Tae Hee, Kim, Yang gi
• Primary Examiner(s): AJIBADE AKONAI, OLUMIDE
• Application Number:
  US11/830,371
• Publication Number:
  US 20080186913A1
• Time in Patent Office: 1,387 Days
• Field of Search: 370/235, 370/235.1, 370/328, 370/329, 370/330, 370/336, 370/337, 370/338, 370/341, 370/345, 370/346, 370/347, 370/349, 370/395.2, 370/395.21, 370/312, 370/395.4, 370/395.41, 370/395.42, 370/395.43, 370/412, 370/431, 370/432, 370/436, 370/442, 370/443, 370/444, 370/445, 370/230.1, 370/229, 370/348, 455/518, 455/519, 455/450, 455/453, 455/41.2, 455/451, 455/452.1, 455/452.2
• US Class Current: 370/235
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 12/1881 with schedule organisation, e.g. priority, sequence management
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04L 45/308 Route determination based on user's profile, e.g. premium users
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/15 in relation to multipoint traffic arrangements for broadcast or multicast in data networks H04L12/18
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/2441 relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/2458 Modification of priorities while in transit
• CPC Class Codes: H04W 28/02 Traffic management, e.g. flow control or congestion control
• CPC Class Codes: H04W 40/32 for defining a routing cluster membership
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]

Abstract

The present invention relates to a wireless communication data transmission method considering the number of terminals requesting services. The present invention provides a wireless communication base station for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication. The base station comprises a storage unit for storing terminal information including the number of terminals which have joined the multicast service, and a priority determining unit for setting a user priority of a data frame to be transmitted using the terminal information. According to the present invention, a priority of data to be transmitted is determined in consideration of the number of serviced terminals, and thus, the data can be reasonably transmitted.

Claims

1. A wireless communication system for use in a network where a multicast service is provided to at least one or more terminals in contention-based channel access mode, the system comprising:

a terminal; and

a wireless communication base station for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the base station comprising;

a storage unit for storing terminal information including the number of terminals which have joined the multicast service; and

a priority determining unit for setting a user priority of a data frame to be transmitted using the terminal information,

wherein the priority determining unit determines the user priority of the frame according to a priority table and adjusts the user priority using the terminal information stored in the storage unit.

2. The system as claimed in claim 1, wherein the user priority is adjusted by classifying the number of terminals, which have joined the multicast service, into a plurality of groups, putting an adjustment value to each group, and adjusting the user priority according to the adjustment value of a group corresponding to the number of terminal that desire to receive the data frame.

3. The system as claimed in claim 2, wherein the priority determining unit sets the user priority to zero if the adjusted user priority is smaller than zero, and sets the user priority to seven if the adjusted user priority is greater than seven.

10. The system as claimed in any one of claims 1-8 and 9, wherein the terminal information of mobile terminals that have joined the multicast service is updated at predetermined time intervals.

4. A wireless communication system for use in a network where a multicast service is provided to at least one or more terminals in contention-based channel access mode, the system comprising:

a terminal; and

a wireless communication base station for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the base station comprising;

a storage unit for storing terminal information including the number of terminals which have joined the multicast service; and

a priority determining unit for setting a user priority of a data frame to be transmitted using the terminal information,

wherein the priority determining unit determines a first user priority of the frame according to the priority table, and creates a second user priority by adjusting the first user priority using the terminal information stored in the storage unit.

5. The system as claimed in claim 4, wherein the user priority is adjusted by classifying the number of terminals, which have joined the multicast service, into a plurality of groups, putting an adjustment value to each group, and adjusting the first user priority according to the adjustment value of a group corresponding to the number of terminal that desire to receive the data frame.

6. The system as claimed in claim 5, wherein the priority determining unit sets the second user priority to zero if the second user priority is smaller than zero, and sets the second user priority to seven if the second user priority is greater than seven.

7. The system as claimed in claim 4, wherein the user priority is adjusted by incrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is greater than a reference value.

8. The system as claimed in claim 4, wherein the user priority is adjusted by decrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is smaller than a reference value.

9. A wireless communication system for use in a network where a multicast service is provided to at least one or more terminals in contention-based channel access mode, the system comprising:

a storage unit for storing terminal information including the number of terminals which have joined the multicast service;

a priority determining unit for setting a user priority of a data frame to be transmitted; and

a virtual collision handler for selecting a data frame to be transmitted from a queue, in which the data frame is stored, using the terminal information if a collision occurs between ACs (access categories),

wherein the virtual collision handler selects a data frame by adjusting the user priority using the terminal information, comparing the adjusted user priority with other user priorities and selecting a data frame with a highest adjusted user priority.

11. A data transmission method for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the method comprising the steps of:

(a) determining, by a priority determining unit provided to a base station, a user priority of a data frame to be transmitted;

(b) examining terminal information of a terminal, which desires to receive the data frame, from a storage unit for storing terminal information of terminals which have joined the multicast service;

(c) adjusting the user priority using the terminal information; and

(d) determining an AC (access category) of the data frame based on the adjusted user priority.

12. The method as claimed in claim 11, wherein the user priority is determined according to a priority table.

13. The method as claimed in claim 12, wherein the user priority is adjusted by classifying the number of terminals, which have joined the multicast service, into a plurality of groups, putting an adjustment value to each group, and incrementing or decrementing the user priority according to the adjustment value of a group corresponding to the number of terminal that desire to receive the data frame.

14. The method as claimed in claim 12, wherein the user priority is adjusted by incrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is greater than a reference value.

15. The method as claimed in claim 12, wherein the user priority is adjusted by decrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is smaller than a reference value.

16. The method as claimed in any one of claims 11 to 15, further comprising, after step (c), the steps of:

setting the user priority to zero if the adjusted user priority is smaller than zero; and

setting the user priority to seven if the adjusted user priority is greater than seven.

17. The method as claimed in claim 16, wherein the data frame is stored in a transmission queue corresponding to the determined AC (access category).

18. The method as claimed in claim 17, wherein a virtual collision handler selects and transmits a data frame with a highest adjusted user priority if a collision occurs between ACs (access categories) when the data frame is transmitted.

19. A data transmission method for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the method comprising the steps of:

examining terminal information of a terminal, which desires to receive a data frame to be transmitted, from a storage unit for storing terminal information of terminals which have joined the multicast service;

determining, by a priority determining unit provided to a base station, a user priority of the data frame to be transmitted using the terminal information; and

determining an AC (access category) of the data frame based on the user priority,

wherein the user priority is determined by classifying the number of terminals, which have joined the multicast service, into a plurality of groups, putting an adjustment value to each group, and incrementing or decrementing the user priority, which is set according to a priority table, according to the adjustment value of a group corresponding to the number of terminal that desire to receive the data frame.

20. A data transmission method for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the method comprising the steps of:

examining terminal information of a terminal, which desires to receive a data frame to be transmitted, from a storage unit for storing terminal information of terminals which have joined the multicast service;

determining, by a priority determining unit provided to a base station, a user priority of the data frame to be transmitted using the terminal information; and

determining an AC (access category) of the data frame based on the user priority,

wherein the user priority is determined by incrementing the user priority, which is set according to the priority table, by a predetermined value if the number of terminals that desire to receive the data frame is greater than a reference value.

21. A data transmission method for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the method comprising the steps of:

examining terminal information of a terminal, which desires to receive a data frame to be transmitted, from a storage unit for storing terminal information of terminals which have joined the multicast service;

determining, by a priority determining unit provided to a base station, a user priority of the data frame to be transmitted using the terminal information; and

determining an AC (access category) of the data frame based on the user priority.,

wherein the user priority is determined by decrementing the user priority, which is set according to the priority table, by a predetermined value if the number of terminals that desire to receive the data frame is smaller than a reference value.

22. A data transmission method for use in a network where a multicast service is received from a network entity and is provided to at least one or more terminals in contention-based channel access mode of a wireless communication, the method comprising the steps of:

determining, by a priority determining unit provided to a base station, a user priority of a data frame to be transmitted;

determining an AC (access category) of the data frame based on the user priority;

examining terminal information of a terminal, which desires to receive the data frame, from a storage unit for storing terminal information of terminals that have joined the multicast service, if a collision occurs between ACs (access categories) when the data frame is transmitted;

adjusting the user priority using the terminal information; and

selecting and transmitting, by a virtual collision handler, a data frame with a highest adjusted user priority.

23. The method as claimed in claim 22, wherein the user priority is adjusted by incrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is greater than a reference value, or decrementing the user priority by a predetermined value if the number of terminals that desire to receive the data frame is smaller than a reference value.