Method for allocating communication bandwidth and associated apparatuses

• US 8,547,919 B2
• Filed: 09/03/2008
• Issued: 10/01/2013
• Est. Priority Date: 09/03/2008
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Karlsson, Patrik, Musikka, Niilo, Andersson, Rutger, Axelsson, Samuel, Martensson, Lars O, Alamshahi, Babak, Ovesj, Fredrik
• Primary Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US13/058,261
• Publication Number:
  US 20110141999A1
• Time in Patent Office: 1,854 Days
• Field of Search: None
• US Class Current: 370/329
• CPC Class Codes: H04W 28/20 Negotiating bandwidth
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/56 based on priority criteria

Abstract

The present invention relates to a method for allocating communication bandwidth between a first terminal of a plurality of terminals and a network device. Wireless communication between the first plurality of terminals and the network device is carried out using a plurality of carrier channels. The communication defines a first bandwidth. The method comprises the steps of receiving the request for change of bandwidth from the first terminal, evaluating current load on carrier channels in use by the first terminal, evaluating priority between all terminals using the carrier channels currently in use by the first terminal, evaluating capacity of all carrier channels available to the first terminal, and allocating a second bandwidth between the network device and the first terminal by allocating a new number of carrier channels. The present invention further relates to a network device and a device for communication.

Claims

1. A method for allocating communication bandwidth between a first terminal of a plurality of terminals and a network device, wherein wireless communication between a plurality of terminals and the network device is carried out using a plurality of carrier channels, the communication defining a first bandwidth, the method comprising the steps of:

receiving a request for change of bandwidth from the first terminal,

evaluating current load on carrier channels in use by the first terminal,

evaluating priority between all terminals using the carrier channels currently in use by the first terminal,

evaluating capacity of all carrier channels available to the first terminal,

allocating a second bandwidth between the network device and the first terminal by allocating a new number of carrier channels,

transmitting carrier allocation information on the grant channel, and

transmitting differentiating information on the grant channel that differentiates;

(a) when a transmission grant for the first terminal is only valid for a new single carrier channel, and and existing current uplink carrier allocated to the first terminal is removed, and when the transmission grant for the first terminal is for an additional uplink carrier, the existing current uplink single carrier remains allocated to the first terminal, or

(b) when a granted transmission rate and Layer 1 signaling for an uplink carrier allocated to the first terminal is terminated and when the granted transmission rate allocated to the first terminal is decreased to zero but the Layer 1 signaling on the uplink carrier continues.

2. The method according to claim 1, wherein the differentiating information is a flag.

3. The method according to claim 1, wherein each available uplink carrier is given a unique index.

4. A network device comprising:

a connector for establishing communication to an antenna unit, the antenna unit adapted to establish wireless communication to a plurality of terminals,

a processor unit,

a transmitter unit configured to establish electrical communication with the processor unit and the antenna unit,

a receiver unit configured to establish electrical communication with the processor unit and the antenna unit,

wherein the processor unit is configured to receive a request for change of bandwidth from a first terminal, evaluate current load on carrier channels in use by the first terminal, evaluate priority between terminals using carrier channels currently in use by the first terminal, evaluate all carrier channels available to the first terminal, and allocate a new number of carrier channels to the first terminal, and

wherein the processor unit is further configured to transmit carrier selection information on the grant channel, and transmit differentiating information on the grant channel that differentiates;

(a) when a transmission grant fix the first terminal is only valid for a new single carrier channel, and an existing current uplink carrier allocated to the first terminal is removed, and when the transmission grant for the first terminal is for an additional uplink carrier, the existing current uplink single carrier remains allocated to the first Terminal, or

(b) when a granted transmission rate and Layer 1 signaling for an uplink carrier allocated to the first terminal is terminated and when the granted transmission rate allocated to the first terminal is decreased to zero but the Layer 1 sinaling on the uplink carrier continues.

5. The network device according to claim 4, wherein the differentiating information is a flag.

6. The network device according to claim 4, wherein each available uplink carrier has a unique index.