Multiband mobile communication system and transmitter used therein

• US 7,502,341 B2
• Filed: 09/22/2005
• Issued: 03/10/2009
• Est. Priority Date: 09/22/2004
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Shirakabe, Masashige, Yoshino, Hitoshi, Sugiyama, Takatoshi, Matoba, Naoto
• Primary Examiner(s): Eisen, Alexander
• Assistant Examiner(s): Perez, Julio R
• Application Number:
  US11/232,009
• Publication Number:
  US 20060063543A1
• Time in Patent Office: 1,265 Days
• Field of Search: 370/319, 370/329, 370/343, 370/465, 370/322, 370/395.21, 370/395.43, 455/510, 455/516, 455/450, 455/451, 455/452, 455/452.2, 455/39, 455/40, 455/41, 455/502, 455/503, 455/509
• US Class Current: 370/319
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/04 using frequency diversity
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

A transmitter used in the multiband environment includes a frequency allocation unit (106) configured to select and allocate a frequency band that satisfies a user QoS from among multiple separate frequency bands currently available for the user, a parameter determination unit (111) configured to determine a transmission parameter required for signal transmission based on the allocated frequency band, and a multi-user scheduling control unit (110) configured to determine a transmission schedule for multiple users taking into account the frequency bands allocated to the multiple users.

Claims

1. A transmitter comprising:

a frequency allocation unit configured to select and allocate two or more frequency bands that together satisfy a user QoS from among multiple separate frequency bands currently available for the user;

a parameter determination unit configured to determine a transmission parameter required for signal transmission that changes with a value of an interval between the allocated frequency bands; and

a multi-user scheduling control unit configured to determine a transmission schedule for multiple users taking into account the frequency bands allocated to the multiple users,

wherein the transmission parameter determination unit regulates an optimum transmission parameter independently for each of the allocated frequency bands if the interval between the allocated frequency bands is greater than a prescribed interval, and regulates the optimum transmission parameter collectively for the allocated frequency bands if the interval between the allocated frequency bands is smaller than the prescribed interval.

2. A multiband mobile communication system including a mobile station and a base station, in which multiple separate frequency bands are available for communications and at least one of the mobile station and the base station is furnished with a transmitter capable of allocation of the multiple separate frequency bands, wherein the transmitter comprises:

a frequency allocation unit configured to select and allocate two or more frequency bands that together satisfy a user QoS from among multiple separate frequency bands currently available for the user;

a parameter determination unit configured to determine a transmission parameter required for signal transmission that changes with a value of an interval between the allocated frequency bands; and

a multi-user scheduling control unit configured to determine a transmission schedule for multiple users taking into account the frequency bands allocated to the multiple users,

wherein the transmission parameter determination unit regulates an optimum transmission parameter independently for each of the allocated frequency bands if the interval between the allocated frequency bands is greater than a prescribed interval, and regulates the optimum transmission parameter collectively for the allocated frequency bands if the interval between the allocated frequency bands is smaller than the prescribed interval.