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AssigneeLG Electronics Inc.
InventorsSung Hoon Jung, Seung June Yi, Young Dae Lee, Sung Duck Chun, Sung Jun Park
Estimating the term…
Provided is a method which is performed by a user equipment in a wireless communication system. The method comprises the following steps: receiving from a serving cell a first measurement setting which is applied to normal operation; receiving from an interfering cell a second measurement setting when a high interference situation occurs; deciding whether the high interference situation has occurred; and performing the measurement based on the first measurement setting and the second measurement setting when the high interference occurrence is detected.
A method of performing measurement by user equipment in a wireless communication system, the method comprising:
An apparatus of performing measurement in a wireless communication system, the apparatus comprising:
Dependencies are inferred from the claim text.
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Supervisory, monitoring or testing arrangements: scheduling measurement reports ; Arrangements for measurement reports
Interference mitigation or co-ordination: of intercell interference
Based on quality criteria: using the level of interference
Orthogonal indexing scheme relating to orthogonal multiplex systems: using small cells within macro cells, e.g. femto, pico or microcells
About 5 years 7 months of term left · ends 1 Jun 2032 (estimated)
The present invention concerns wireless communications, and more specifically, to a method of performing measurement by sensing interference from a serving cell and other cells and selectively applying a limited measurement configuration in a wireless communication system and an apparatus supporting the method.
3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), an evolution of UMTS (Universal Mobile Telecommunications System), is introduced as 3GPP release 8. 3GPP LTE adopts Orthogonal Frequency Division Multiple Access (OFDMA) for downlink and Single Carrier-Frequency Division Multiple Access (SC-FDMA) for uplink. Multiple Input Multiple Output (MIMO) is employed of having up to four antennas. Recently, an advanced version of 3GPP LTE, 3GPP LTE-advanced (LTE-A), is actively on discussion.
User equipment (UE), while being serviced from a specific cell, may be interfered by radio signals transmitted from another cell. User equipment periodically measures cells and reports a measurement result. In case user equipment performs handover to another cell, it may perform measurement on a neighboring cell as well as a serving cell and may report a result. In measuring the specific cell, interference caused by radio signals from other cells renders it difficult for the user equipment to normally measure the specific cell. This deteriorates mobility of the user equipment in the wireless communication system.
FIG. 1 shows a wireless communication system according to the present invention.
FIG. 2 is a block diagram illustrating a radio protocol architecture for a user plane.
FIG. 3 is a block diagram illustrating a radio protocol architecture for a control plane.
FIG. 1 shows a wireless communication system according to the present invention. This system may be also referred to as Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN) or Long Term Evolution (LTE)/LTE-A system.
The E-UTRAN includes a base station (BS) 20 providing a control plane and a user plane to user equipment (UE) 10. The user equipment 10 may be stationary or mobile and may be also referred to by other terms such as Mobile Station (MS), User Terminal (UT), Subscriber Station (SS), Mobile Terminal (MT), or wireless device. The base station 20 is a fixed station communicating with the user equipment 10 and may be referred to by other terms such as evolved-NodeB (eNB), Base Transceiver System (BTS), or access point.
The base stations 20 may be connected to each other through an X2 interface. The base station 20 is connected to an Evolved Packet Core (EPC) 30 through an S1 interface, more specifically, to an Mobility Management Entity (MME) through an S1-MME and to an Serving Gateway (S-GW) through S1-U.