Method and system for frequency band allocation based on frequency band usage measurements

• US 7,782,964 B1
• Filed: 08/09/2005
• Issued: 08/24/2010
• Est. Priority Date: 08/09/2005
• Status: Active Grant

• Current Assignee: Sprint Spectrum LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Trueman, Tom, Hayne, Kristin, Wade, Jerry, Pippert, Robert, Talley, Ryan S
• Primary Examiner(s): Liu; Shuwang
• Assistant Examiner(s): LAM, KENNETH T
• Application Number:
  US11/199,760
• Time in Patent Office: 1,841 Days
• Field of Search: 375/260, 375/259, 375/267, 375/295
• US Class Current: 375/260
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14

Abstract

A method for selecting a frequency band, from among a plurality of frequency bands controllable by a radio network controller (RNC), to carry a data communication. The method may include obtaining frequency band usage measurements for a plurality of frequency bands, and using the frequency band usage measurements to select a particular frequency band of the plurality of frequency bands to carry the data communication. Frequency band usage measurements may be based on how many idle slots (and/or data channels) are carried through each of the plurality of frequency bands during a measurement time period. A comparison of the frequency band usage measurements can be used to determine which frequency band sent the greatest number of idle slots (or the fewest number of data channels). The method provides for selecting a frequency band best suited (e.g., has the most available capacity for carrying a data communication) for carrying the data communication.

Claims

1. A method comprising:

a radio network controller (RNC) executing computer-readable program instructions arranged as a timer to measure a measurement time period;

the RNC executing computer-readable program instructions for counting how many idle slots are carried in each forward-link frequency band of a plurality of frequency bands during the measurement time period, wherein each forward-link frequency band of the plurality of frequency bands is controlled by the RNC;

the RNC determining from among the plurality of frequency bands a particular forward-link frequency band that carried a greatest number of idle slots during the measurement time period, wherein determining the particular forward-link frequency band that carried the greatest number of idle slots during the measurement time period comprises the RNC comparing how many idle slots were carried in the particular forward-link frequency band to, for each of the other frequency bands of the plurality of frequency bands, how many idle slots were carried in that frequency band;

the RNC receiving a new data communication request; and

the RNC (i) selecting the particular forward-link frequency band that carried the greatest number of idle slots during the measurement time period to carry a data communication associated with the new data communication request, and (ii) thereafter using the particular forward-link frequency band that carried the greatest number of idle slots during the measurement time period to carry the data communication associated with the new data communication request.

2. The method of claim 1, wherein receiving the new data communication request comprises receiving a data communication request message sent from a mobile station.

3. The method of claim 1, wherein receiving the new data communication request comprises receiving a message requesting connection to a mobile station, wherein the message requesting connection to the mobile station is sent from a packet-network device located remote from the RNC.

4. The method of claim 1, wherein receiving the new data communication request comprises receiving a message requesting connection to a mobile station, wherein the message requesting connection to the mobile station is generated within the RNC.

5. The method of claim 1, wherein the measurement time period is less than or equal to one second.

6. The method of claim 1, further comprising:

transmitting a frequency band allocation message to a mobile station, wherein the frequency band allocation message comprises a request for the mobile station to tune to a frequency in the particular frequency band.

7. The method of claim 1, further comprising:

transmitting a frequency band allocation message to a mobile station, wherein the frequency band allocation message comprises a request for the mobile station to carry the data communication via the particular frequency band.

8. The method of claim 1, wherein the RNC is configured to perform the data communication according to an Evolution for Data Only (EVDO) standard.

9. The method of claim 1,

wherein the idle slots carried in each of the frequency bands are arranged according to a TIA/EIA standard IS-856, and

wherein the idle slots carried in each of the frequency bands do not include traffic or control data.