Adaptive R99 and HS PS (high speed packet-switched) link diversity for coverage and capacity enhancement of circuit-switched calls

• US 8,774,164 B2
• Filed: 02/25/2009
• Issued: 07/08/2014
• Est. Priority Date: 02/25/2009
• Status: Active Grant

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Klein, Robert, Brisebois, Arthur
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): MAGLO, EMMANUEL K
• Application Number:
  US12/392,578
• Publication Number:
  US 20100215034A1
• Time in Patent Office: 1,959 Days
• Field of Search: 370/329, 370/352, 370/353, 455/436, 4554352-438, 455/522
• US Class Current: 370/352
• CPC Class Codes: H04W 28/0231 based on communication conditions dynamic wireless traffic scheduling definition based on channel quality criteria H04W72/54
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 72/54 based on quality criteria

Abstract

A system and methodology that facilitates adaptive link diversity for enhanced coverage and capacity during user data communication in a UMTS (Universal Mobile Telecommunications System) is provided. Specifically, current radio conditions associated with the user data are monitored and analyzed. Moreover, a switching and/or concurrent transport mechanism is implemented for communication between a NodeB and UE (User Equipment), when the current radio conditions change beyond a predefined level. In particular, a CS (Circuit Switched) over HSPA (High Speed Packet Access) connection is reconfigured to an R99 (Release 99) CS connection, or a concurrent R99 CS connection is provided along with the CS over HSPA connection, when detected that radio conditions have degraded beyond a predefined threshold. In one aspect, the selection between switching to a new transport mechanism and, adding a concurrent transport mechanism is based on an analysis and/or operator defined conditions.

Claims

1. A system, comprising:

a memory to store executable instructions; and

a processor, coupled to the memory, that facilitates execution of the executable instructions to perform operations, comprising;

subsequent to a circuit-switched communication session being determined to be established between an access point device and a user equipment via a radio bearer link that is shared by user equipments coupled to the access point device, determining ratio data indicative of a ratio of a first number of data transmissions sent from the access point device to the user equipment, to a second number of data transmissions sent from the user equipment to the access point device during the circuit-switched communication session, and

based on a determination that the ratio data satisfies a defined ratio criterion and retransmission data indicative of a rate at which information has been retransmitted between the user equipment and the access point device satisfies a defined retransmission criterion, reconfiguring the circuit-switched communication session between the access point device and the user equipment via a dedicated radio bearer link.

2. The system of claim 1, wherein the operations further comprise:

determining the retransmission data based on monitoring retransmission of the information between the user equipment and the access point device.

3. The system of claim 1, wherein the operations further comprise:

determining distance data indicative of a distance of the user equipment from the access point device, wherein the reconfiguring of the circuit-switched communication session is in response to the distance data being determined to satisfy a defined distance criterion.

4. The system of claim 1, wherein the defined retransmission criterion comprises retransmission information indicative of a threshold rate and the reconfiguring of the circuit-switched communication session is in response to determining that the rate is higher than the threshold rate.

5. The system of claim 1, wherein the operations further comprise:

directing communication data between the access point device and the user equipment via the radio bearer link; and

subsequent to the directing, redirecting the communication data between the access point device and the user equipment via the dedicated radio bearer link.

6. The system of claim 1, wherein the radio bearer link comprises a circuit switched over high speed packet access connection and the dedicated radio bearer link comprises a release 99 circuit switched connection.

7. The system of claim 1, wherein the operations further comprise:

facilitating a concurrent transmission of data associated with the circuit-switched communication session between the access point device and the user equipment via the shared radio bearer link and the dedicated radio bearer link.

8. The system of claim 7, wherein the operations further comprise:

receiving, from the user equipment, channel quality information representing a channel quality indicator, wherein the reconfiguring of the circuit-switched communication session is in response to the channel quality information being determined to satisfy a defined channel quality indicator criterion.

9. A method, comprising:

determining, by a system comprising a processor, retransmission data indicative of a rate of data retransmissions associated with a circuit-switched communication session between a user equipment and an access point device via a shared transport link; and

in response to determining that the retransmission data satisfies a retransmission criterion and determining that ratio data indicative of a ratio of a first number of data transmissions sent from the access point device to the user equipment, to a second number of data transmissions sent from the user equipment to the access point device during the circuit-switched communication session satisfies a ratio criterion, facilitating, by the system, a reconfiguration of the circuit-switched communication session between the access point device and the user equipment via a dedicated transport link.

10. The method of claim 9, wherein the determining that the retransmission data satisfies the retransmission criterion comprises determining that the rate is higher than a defined rate threshold.

11. The method of claim 9, wherein the facilitating the reconfiguration comprises facilitating the reconfiguration of a circuit switched over high speed packet access connection between the access point device and the user equipment to release 99 circuit switched connection.

12. The method of claim 9, wherein the facilitating the reconfiguration comprises:

based on channel quality information representing a channel quality indicator received from the user equipment, reconfiguring a circuit switched over high speed packet access connection between the access point device and the user equipment to release 99 circuit switched connection.

13. The method of claim 9, further comprising:

determining, by the system, distance data indicative of a distance of the user equipment from the access point device, wherein the facilitating the reconfiguration comprises facilitating the reconfiguration in response to determining that the distance data satisfies a defined distance criterion.

14. The method of claim 9, wherein the facilitating the reconfiguration comprises:

subsequent to a retransmission of first data of the circuit-switched communication session via the shared transport link, facilitating a transmission of the first data between the user equipment and the access point device via the dedicated transport link.

15. A non-transitory computer-readable storage device comprising executable instructions that, in response to execution, cause a system comprising a processor to perform operations, comprising:

determining retransmission data indicative of a rate of repetitions of data transmission between a user equipment and an access point device during a circuit-switched communication session that is facilitated via a shared transport link; and

in response to determining that the retransmission data satisfies a retransmission criterion and determining that ratio data indicative of a ratio of a first number of data transmissions sent from the access point device to the user equipment, to a second number of data transmissions sent from the user equipment to the access point device during the circuit-switched communication session, satisfies a ratio criterion, reconfiguring the circuit-switched communication session between the access point device and the user equipment via a dedicated transport link.

16. The non-transitory computer-readable storage device of claim 15, wherein the determining that the retransmission data satisfies the retransmission criterion comprises determining that the rate of repetitions is higher than a defined rate threshold.

17. The non-transitory computer-readable storage device of claim 15, wherein the reconfiguring further comprises reconfiguring the circuit-switched communication session in response to determining that a value associated with a radio condition associated with the user equipment is less than a threshold value.

18. The non-transitory computer-readable storage device of claim 15, wherein the shared transport link comprises a circuit switched over high speed packet access connection and the dedicated transport link comprises a release 99 circuit switched connection.

19. The non-transitory computer-readable storage device of claim 17, wherein the threshold value is a first threshold value and the operations further comprise:

comparing the value with a second threshold value, wherein the second threshold value is lower than the first threshold value.

20. The non-transitory computer-readable storage device of claim 19, wherein the operations further comprise:

facilitating a first transmission of first data associated with the circuit-switched communication session between the access point device and the user equipment via the dedicated transport link; and

in response to the determining that the value is less than the second threshold value, facilitating, concurrently with the first transmission, a second transmission of second data associated with the circuit-switched communication session between the user equipment and the access point device via the shared transport link.

21. A user equipment, comprising:

a memory to store executable instructions; and

a processor, coupled to the memory, that facilitates execution of the executable instructions to perform operations, comprising;

receiving first data associated with a circuit-switched communication session from an access point device via a shared radio bearer link that is utilized for a communication session, and

in response to receiving information associated with a change in the shared radio bearer link that is determined as a function of ratio data being determined to satisfy a defined ratio criterion and retransmission data being determined to satisfy a defined retransmission criterion, facilitating a reception of second data associated with the circuit-switched communication session from the access point device via a dedicated radio bearer link, wherein the ratio data is indicative of a ratio of a first number of data transmissions sent from the access point device to the user equipment, to a second number of data transmissions sent from the user equipment to the access point device and wherein the retransmission data is indicative of a rate at which communication data has been retransmitted between the user equipment and the access point device.

22. The user equipment of claim 21, wherein the operations further comprise:

receiving third data associated with the circuit-switched communication session from the access point device via the shared radio bearer link concurrently with the reception of the second data via the dedicated radio bearer link, and

aligning the second data with the third data.

23. The user equipment of claim 21, wherein the operations further comprise:

directing, to the access point device, indicator data representing a channel quality indicator associated with the user equipment, wherein the information is determined as a function of the indicator data.