Virtually centralized uplink scheduling

• US 8,184,583 B2
• Filed: 12/23/2009
• Issued: 05/22/2012
• Est. Priority Date: 10/03/2003
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Abedi, Saied
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US12/646,038
• Publication Number:
  US 20100142469A1
• Time in Patent Office: 881 Days
• Field of Search: 370/230, 370/230.1, 370231-236, 370252-253, 370/310, 370328-338, 370/341, 370346-350, 370/395.4, 370/430, 370/432, 370/437, 370/443, 370/449, 370/465, 370/468, 370477-478, 370/480, 370342-344, 370/441, 370/462, 370/473, 370/479, 455/88, 455/102, 455/418, 455/450, 4554521-4522, 455/453, 455509-510, 455/522, 455/550.1, 455/556.2, 455/561, 455/562.1, 455/575.7, 455/67.11, 455/403, 455/420, 455423-425, 455512-514, 455515-517
• US Class Current: 370/329
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A method of scheduling uplink transmissions from a plurality of source user equipments to a base station is disclosed. The method comprises the steps of determining the amount of data in the data buffer of each of the user equipments, comparing the amount of data in the data buffers of the user equipments to obtain, for each user equipment, a relative indicator, the relative indicator indicating how full that user equipment'"'"'s data buffer is in comparison to the data buffers of the other user equipments, and scheduling uplink transmissions in dependence on the relative indicators. In this way, each user equipment is given some knowledge of the state of the buffer in the other user equipments. The user equipments are therefore able to make more efficient scheduling decisions. This can improve the throughput and give lower packet delivery delays.

Claims

1. A mobile communication system for scheduling uplink data transmission from a plurality of mobile stations to a base station, the mobile communication system comprising:

the base station comprises a transmitting unit that transmits a respective indicator relating to data amount, which is used for deciding on a transmission data rate of the uplink data transmission, to each of said plurality of mobile stations; and

at least one of the plurality of mobile stations comprises a transmitting unit that transmits respective data amount information and data to the base station, wherein an amount of said data is decided by adjusting modulation and coding scheme based on the respective indicator which is transmitted to said mobile station.

2. A base station used in a mobile communication system in which a plurality of mobile stations transmit data to said base station, said base station comprising:

a receiver unit that receives respective data amount information from the plurality of mobile stations and outputs a respective indicator relating to data amount, which is used for deciding on a transmission data rate of uplink data transmission, to each of said plurality of mobile stations, wherein

at least one of the plurality of mobile stations comprises a transmitting unit that transmits the respective data amount information and the data to the base station, wherein an amount of said data is decided by adjusting modulation and coding scheme based on the respective indicator which is transmitted to said mobile station.

3. A method for scheduling data transmissions from a plurality of mobile stations to a base station, said method comprising:

sending respective data amount information from said plurality of mobile stations to said base station;

sending a respective indicator relating to data amount, which is used for deciding on a transmission data rate of uplink data transmission, to each of said plurality of mobile stations from said base station; and

sending data from at least one of said plurality of mobile stations, wherein an amount of said data is decided by adjusting modulation and coding scheme based on the respective indicator which is transmitted to said mobile station.