METHOD IN WHICH A TERMINAL CONNECTED TO A CELLULAR NETWORK MEASURES A WIRELESS LAN AND RECEIVES INFORMATION FOR MEASUREMENT IN A WIRELESS ACCESS SYSTEM, AND TERMINAL OR BASE STATION DEVICE FOR SAME

• US 20140247743A1
• Filed: 09/28/2012
• Published: 09/04/2014
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul
• Granted Patent: US 9,319,918 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/001 Synchronization between nodes

Abstract

The present invention relates to a measurement method for the access of a terminal to a second base station in a wireless access system, and to a base station and terminal for the method. Provided is a measurement reporting method in a measurement method for the access of a first base station-based terminal to a second base station in a wireless access system, comprising the following steps: receiving information on the second base station from the first base station; measuring the second base station using the information on the second base station; and reporting the information obtained by the second base station measurement to the first base station, wherein the second base station measurement is performed on the basis of a reference signal transmitted by the second base station. A terminal device for the method is also provided.

Claims

1-28. -28. (canceled)

29. A method for performing measurement and reporting for access to a second base station by a user equipment based on a first base station in a wireless access system, the method comprising:

receiving information on the second base station from the first base station;

measuring the second base station using the information on the second base station; and

reporting measurement information for the second base station to the first base station,

wherein the measuring is performed based on a reference signal transmitted by the second base station, and

wherein the reference signal transmitted by the second base station corresponds to a reference signal of the first base station, and the first base station and the second base station are heterogeneous networks.

30. The method according to claim 29, wherein the first base station is a cellular network base station and the second base station is an access point (AP).

31. The method according to claim 29, wherein the information on the second base station includes at least one of channel information, a list of at least one access point (AP), a cell identity, a number of antenna ports, a transmission pattern of the reference signal, transmission bandwidth of the reference signal, transmission timing information of a beacon signal, and transmission period and offset information.

32. The method according to claim 29, wherein the transmission period and offset information of the reference signal is exchanged between the first base station and the second base station through a backhaul link.

33. The method according to claim 29, further comprising:

receiving a cell-specific reference signal (CRS) pattern from the second base station, wherein an orthogonal frequency division multiplexing (OFDM) symbol on which a CRS is not transmitted is omitted in the CRS pattern.

34. The method according to claim 29, further comprising:

receiving measurement window information of a transmission timing of the reference signal from the first base station to adjust time synchronization between the first base station and the second base station; and

performing measurement for the second base station according to the adjusted synchronization.

35. The method according to claim 29, further comprising:

transmitting, to the first base station, at least one of statistics of a channel state of the second base station, the number of contention stations, estimated throughput information, and channel recommendation information.

36. A method for receiving measurement information for a second base station by a first base station in a wireless access system, the method comprising:

transmitting activated information on the second base station to a user equipment based on the first base station in consideration of a location of the user equipment based on the first base station; and

receiving measurement information for the second base station measured by the user equipment based on the first base station, using the information on the second base station,

wherein the measurement information for the second base station is obtained based on a reference signal transmitted by the second base station, and

wherein the reference signal transmitted by the second base station corresponds to a reference signal of the first base station, and the first base station and the second base station are heterogeneous networks.

37. The method according to claim 36, wherein the first base station is a cellular network base station and the second base station is an access point (AP).

38. The method according to claim 36, wherein the information on the second base station includes at least one of channel information, a list of at least one access point (AP), a cell identity, the number of antenna ports, a transmission pattern of the reference signal, transmission bandwidth of the reference signal, transmission timing information of a beacon signal, and transmission period and offset information.

39. The method according to claim 36, wherein the transmission period and offset information of the reference signal is exchanged with the second base station through a backhaul link.

40. The method according to claim 36, further comprising:

receiving a cell-specific reference signal CRS pattern from the user equipment based on the first base station, wherein an orthogonal frequency division multiplexing (OFDM) symbol on which a CRS is not transmitted is omitted in the CRS pattern.

41. The method according to claim 36, further comprising:

transmitting measurement window information of a transmission timing of the reference signal to the user equipment based on the first base station to adjust time synchronization between the first base station and the second base station; and

performing measurement for the second base station according to the adjusted synchronization.

42. The method according to claim 36, further comprising:

receiving, from the user equipment based on the first base station, at least one of statistics of a channel state of the second base station, the number of contention stations, estimated throughput information, and channel recommendation information.

43. A user equipment based on a first base station, for performing measurement for access to a second base station in a wireless access system, the user equipment comprising:

a transmitter;

a receiver; and

a processor configured to control the transmitter and the receiver, control the receiver to receive information on the second base station from the first base station, measure the second base station using the information on the second base station, and control the transmitter to report measurement information for the second base station to the first base station, and

wherein the measurement for the second base station is performed based on a reference signal transmitted by the second base station, and

wherein the reference signal transmitted by the second base station corresponds to a reference signal of the first base station, and the first base station and the second base station are heterogeneous networks.

44. A first base station for receiving measurement information for a second base station in a wireless access system, the first base station comprising:

transmitter;

receiver; and

a processor configured to control the transmitter and the receiver, control the transmitter to transmit activated information on the second base station to a user equipment based on the first base station in consideration of a location of the user equipment based on the first base station and control the receiver to receive measurement information for the second base station measured by the user equipment based on the first base station, using the information on the second base station, and

wherein the measurement information for the second base station is obtained based on a reference signal transmitted by the second base station, and

wherein the reference signal transmitted by the second base station corresponds to a reference signal of the first base station, and the first base station and the second base station are heterogeneous networks.