US 8,559,397 B2 · Handover-related radio link failure detection

Abstract

A Base Station (BS) apparatus, for detecting a HandOver (HO)-related Radio Link Failure (RLF) in a wireless communication, and method for its operation, are provided. The method includes receiving an HO request from another BS for a User Equipment (UE) that has an established connection with the BS, receiving a connection reestablishment request from the UE after an HO of the UE to the other BS has been performed, determining if the connection reestablishment request is received prior to the expiration of a timer, and if it is determined that the connection reestablishment request is received from the UE prior to the expiration of a timer, determining that an RLF occurred due to a too early HO triggering.

Drawings

Drawings are temporarily unavailable. Open the PDF at USPTO

Drawings

Claims22

Dependent claims

A method for operating a Base Station (BS) for detecting a too early HandOver (HO)-related Radio Link Failure (RLF) in a wireless communication system, the method comprising:

receiving an HO request from another BS for a User Equipment (UE) that has an established connection with the BS, wherein the HO request includes at least one identifier;
receiving a connection reestablishment request from the UE after an HO of the UE to the other BS has been performed, wherein the connection reestablishment request includes at least one identifier;
determining if the connection reestablishment request is received prior to the expiration of a timer;
determining if the at least one identifier included in the HO request received from the other BS and the connection reestablishment request received from the UE are identical;
if it is determined that the connection reestablishment request is received from the UE prior to the expiration of a timer, determining that an RLF occurred due to a too early HO triggering;
if it is determined that the RLF occurred due to a too early HO triggering, sending a report to a Self-Organizing Network (SON) Server indicating that the RLF occurred due to the too early HO triggering, and
receiving a message from the SON Server comprising at least a timer setting corresponding to an amount of time for determining whether an RLF occurs due to too early HO triggering, wherein the timer setting is configured based on the report sent to the SON Server.

4 more elements

A Base Station (BS) apparatus for detecting a too early HandOver (HO)-related Radio Link Failure (RLF) in a wireless communication system, the apparatus comprising:

a first receiver for receiving signals from another BS;
a second receiver for receiving signals from a User Equipment (UE);
a first transmitter for transmitting signals to a Self-Organizing Network (SON) Server;
a controller for controlling to receive an HO request via the first receiver from the other BS for the UE that has an established connection with the BS, wherein the HO request includes at least one identifier, for controlling to receive via the second receiver a connection reestablishment request from the UE after an HO of the UE to the other BS has been performed, wherein the connection reestablishment request includes at least one identifier, for determining if the connection reestablishment request is received prior to the expiration of a timer, for determining if the at least one identifier included in the HO request received from the other BS and the connection reestablishment request received from the UE are identical, if it is determined that the connection reestablishment request is received from the UE prior to the expiration of a timer, for determining that an RLF occurred due to a too early HO triggering, and if it is determined that the RLF occurred due to a too early HO triggering, for controlling to send a report to the SON Server via the first transmitter that indicates that the RLF occurred due to the too early HO triggering, and for controlling to receive a message from the SON Server comprising at least a timer setting corresponding to an amount of time for determining whether an RLF occurs due to too early HO triggering, wherein the timer setting is configured based on the report sent to the SON Server.

1 more element

Dependencies are inferred from the claim text.

Description6,818 words

Summary2,234 words

#1. Field of the Invention

#The present invention relates to a wireless communication system. More particularly, the present invention relates to an apparatus and method for HandOver (HO)-related Radio Link Failure (RLF) detection in a wireless communication system.

#2. Description of the Related Art

Brief description of the drawings10 figures

#The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which:

#FIG. 1 illustrates an example of a too late HandOver (HO) triggering scenario according to the conventional art;

#FIG. 2 illustrates an example of a too early HO triggering scenario according to the conventional art;

Detailed description4,338 words

#Throughout the drawings, like reference numerals will be understood to refer to like parts, components, and structures.

#The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

#The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention are provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents.

Facts

Application

12/622,098Filed 19 Nov 2009

Published

US 2011/0117908 A119 May 2011

Granted

15 Oct 2013

Term ends

20 Sep 2030

Estimated · how

20 years from earliest known nonprovisional domestic filing plus recorded patent term adjustment, including 305 days of adjustment. Maintenance-fee lapses, terminal disclaimers and statutory extensions have not been checked. The continuity chain may be incomplete; this is not an enforceability determination.

Classification3 codes

H04W 76/19
Connection setup: connection re-establishment
H04W 36/08
Hand-off or reselection arrangements: reselecting an access point
H04W
Wireless communication networks

Timeline

19 Nov 2009Application filedUS 12/622,098
19 Nov 2009Assigned to Samsung Electronics Co., Ltd.assignment of assignor's interest
19 May 2011PublishedUS 2011/0117908 A1
15 Oct 2013GrantedUS 8,559,397 B2
12 Oct 2026TodayWithin its term
20 Sep 2030Term endsEstimated, includes 305 days of adjustment

Handover-related radio link failure detection

Life of this patent

Handover-related radio link failure detection

Life of this patent

Life of this patent

Abstract

Drawings

Drawings

Claims22

Description6,818 words

Drawings

Classification3 codes

Life of this patent

Description6,818 words