Connection Attempt to Alternative Access Upon Connection Attempt Rejection

• US 20180176842A1
• Filed: 02/20/2018
• Published: 06/21/2018
• Est. Priority Date: 03/03/2014
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Tan Bergstrom, Mattias, MESTANOV, Filip, TEYEB, Oumer, LINDHEIMER, Christofer
• Granted Patent: US 10,470,093 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/24 Reselection being triggered by specific parameters
• CPC Class Codes: H04W 36/26 by agreed or negotiated communication parameters
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/0258 controlling an operation mode according to history or models of usage information, e.g. activity schedule or time of day
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 88/02 Terminal devices
• 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: Y02D 30/70 in wireless communication networks

Abstract

The invention relates to methods, user equipments, computer programs, computer program products and carriers for access network selection between a first network and a second network. Said first and second networks comprise one or more access candidates. An access network selection procedure is performed for one or more access candidates of the second network, sequentially performing for the access candidates of the second network connection establishing attempts to one or more access candidates, by selecting a new access candidate from said one or more access candidates, and performing connection establishing attempts to said access candidate until a connection to the access candidate is established or a stop criterion for said access candidate is fulfilled.

Claims

1-33. -33. (canceled)

34. A user equipment, UE, for access network selection between a first network and a second network, said first and second networks comprising one or more access candidates, the UE comprising a processor circuitry and a computer program comprising computer program code which, when run in a processor circuitry causes the UE to perform the steps of:

Starting the access network selection procedure for one or more access candidates of second network;

Sequentially performing for the access candidates of the second network connection establishing attempts to one or more access candidates by;

Selecting a new access candidate from said one or more access candidates;

performing connection establishing attempts to said access candidate until a connection to the access candidate is established or a stop criterion for said access candidate is fulfilled.

35. The user equipment according to claim 34, wherein the user equipment is adapted to perform:

Terminating the access network selection procedure if connection to one of said one or more access candidates is established or each connection establishing attempt for all access candidates have been stopped by a stop criterion.

36. The user equipment according to claim 34, wherein the stop criterion is based on a maximum time for a connection establishing attempt.

37. The user equipment according to claim 34, wherein the stop criterion is based on a maximum number of connection establishing attempts for establishing connection to an access candidate.

38. The user equipment according to claim 34, wherein the stop criterion is that a rejection is received from the access candidate to which a connection establishing attempt is performed.

39. The user equipment according to claim 34, wherein the selecting is based on a cause value indicating an alternative access candidate for the user equipment to select.

40. The user equipment according to claim 39, wherein the cause value indicates selecting an alternative access candidate implementing a Radio Access Technology which differs from the Radio Access Technology used in the first network.

41. The user equipment according to claim 39, wherein an absence of a default value or the cause value is indicating for the user equipment to perform a default behaviour.

42. The user equipment according to claim 34, wherein the user equipment selects one alternative access candidate based on a priority order.

43. The user equipment according to claim 42, wherein the UE is adapted to evaluate which of the access candidates available that has the highest priority.

44. The user equipment according to claim 42, wherein the user equipment is adapted to maintain a priority list with a list of available access candidates.

45. The user equipment according to 42, wherein the user equipment is adapted to update said list of available access candidates.

46. The user equipment according to claim 44, wherein the user equipment is adapted to update said list of available access candidates when the user equipment gets rejected or disconnected with a specific cause value.

47. The user equipment according to claim 34, wherein the second network is implementing an alternative Radio Access Technology than the Radio Access Technology of the first network.