WO2014193003A1 - 무선 접속 시스템에서 제어 정보 수신 방법 및 장치 - Google Patents
무선 접속 시스템에서 제어 정보 수신 방법 및 장치 Download PDFInfo
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- WO2014193003A1 WO2014193003A1 PCT/KR2013/004753 KR2013004753W WO2014193003A1 WO 2014193003 A1 WO2014193003 A1 WO 2014193003A1 KR 2013004753 W KR2013004753 W KR 2013004753W WO 2014193003 A1 WO2014193003 A1 WO 2014193003A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/04—Reselecting a cell layer in multi-layered cells
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- H—ELECTRICITY
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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Definitions
- the present invention relates to a wireless access system, and more particularly, in a heterogeneous network system including a macro cell and a femto cell, a PHICH (Physical Hybrid ARQ) in which a UE is changed through a DL Shared Channel (DL-SCH) in a heterogeneous network system.
- An indicator channel relates to a method and apparatus for receiving control information including a configuration.
- Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
- a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA).
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- MCD division multiple access
- MCDMA multi-carrier frequency division multiple access
- MC-FDMA multi-carrier frequency division multiple access
- An object of the present invention is to provide a method and apparatus for receiving a modified PHICH configuration information through a downlink shared channel in a heterogeneous network system including a wireless access system, preferably a macro cell and a femto cell.
- Another object of the present invention is to provide a method and apparatus for receiving offset information indicating a time point at which a changed PHICH configuration information is applied through a downlink shared channel in a heterogeneous network system including a macro cell and a femto cell. will be.
- a method for receiving control information from a macro cell includes a first PHICH for a femto cell from a macro cell.
- Receiving ARQ Indicator Channel) configuration information Performing handover from the macro cell to the femto cell; Setting a PHICH interval to a first number of orthogonal frequency division multiplexing (OFDM) symbols according to the first PHICH configuration information after the handover; Receiving second PHICH configuration information from the femto cell through a downlink shared channel (DL-SCH); And resetting the PHICH interval to a second number of OFDM symbols according to the second PHICH configuration information.
- OFDM orthogonal frequency division multiplexing
- the method may further include receiving, from the femtocell, offset information indicating the time point at which the second PHICH configuration information is applied through the downlink shared channel.
- the PHICH resetting information may be received through a medium access control (MAC) control element.
- MAC medium access control
- the offset information may be received through a medium access control (MAC) control element.
- MAC medium access control
- the PHICH resetting information may be received through a Radio Resource Control (RRC) message.
- RRC Radio Resource Control
- the offset information may be received through a RRC (Radio Resource Control) message.
- RRC Radio Resource Control
- the received signal strength between the terminal and the femto cell is less than the received signal strength between the terminal and the macro cell, and the terminal can handover from the macro cell to the femto cell for cell range expansion.
- the downlink shared channel may be a channel specific to the terminal.
- a method for transmitting control information by a femto cell includes a downlink channel including a downlink channel signal measurement value from a UE handed over from the macro cell Receiving information; If the downlink channel signal measurement value is less than or equal to a reference value, the method may include transmitting physical hybrid-ARQ indicator channel (PHICH) configuration information to the terminal through a downlink shared channel (DL-SCH).
- PHICH physical hybrid-ARQ indicator channel
- the method may further include transmitting the PHICH configuration information to the terminal through a physical broadcast channel (PBCH) when the downlink channel signal measurement value is larger than a reference value.
- PBCH physical broadcast channel
- the method may further include transmitting offset information indicating a time point at which the PHICH configuration information is applied to the terminal.
- the PHICH configuration information may be transmitted through one of a medium access control (MAC) control element and a radio resource control (RRC) message.
- MAC medium access control
- RRC radio resource control
- the offset information may be transmitted through one of a medium access control (MAC) control element and a radio resource control (RRC) message.
- MAC medium access control
- RRC radio resource control
- a terminal for receiving control information in a heterogeneous network system including a macro cell and a femto cell includes: a radio frequency (RF) unit; And a processor, wherein the processor receives first physical hybrid-ARQ indicator channel (PHICH) configuration information for a femto cell from a macro cell, performs a handover from the macro cell to the femto cell, and performs the handover Thereafter, the PHICH interval is set to a first number of orthogonal frequency division multiplexing (OFDM) symbols according to the first PHICH configuration information, and the second PHICH configuration information is received from the femto cell through a downlink shared channel (DL-SCH). And resetting the PHICH interval to a second number of OFDM symbols according to the second PHICH configuration information.
- PHICH physical hybrid-ARQ indicator channel
- a femto cell for transmitting control information in a heterogeneous network system including a macro cell and a femto cell includes: a radio frequency (RF) unit; And a processor, wherein the processor receives downlink channel information including a downlink channel signal measurement value from a terminal handed over from a macro cell, and sends the PHICH to the terminal if the downlink channel signal measurement value is equal to or less than a reference value.
- RF radio frequency
- the processor receives downlink channel information including a downlink channel signal measurement value from a terminal handed over from a macro cell, and sends the PHICH to the terminal if the downlink channel signal measurement value is equal to or less than a reference value.
- DL-SCH downlink shared channel
- a terminal may receive control information including a changed PHICH configuration through a downlink shared channel.
- the terminal may receive offset information indicating a time point at which the changed PHICH configuration is applied through the downlink shared channel.
- E-UMTS Evolved Universal Mobile Telecommunications System
- FIG. 2 illustrates a structure of a radio interface protocol between a UE and an E-UTRAN based on the 3GPP radio access network standard.
- FIG 3 illustrates a physical channel and signal transmission using the same in an LTE system.
- FIG. 4 illustrates a structure of a radio frame used in LTE.
- 5 illustrates a resource grid for a downlink slot.
- FIG. 6 illustrates a structure of a downlink subframe.
- FIG. 7 shows an example of a heterogeneous network system including a macro cell and a femto cell.
- FIG. 8 is a flowchart illustrating a method of receiving control information of a terminal according to an embodiment of the present invention.
- LCID Logical Channel ID
- FIG. 10 shows an example of a MAC-CE including PHICH reset information.
- FIG. 11 shows an example of a MAC-CE including PHICH reset information and offset information.
- FIG. 12 illustrates a base station and a terminal that can be applied to an embodiment of the present invention.
- each component or feature may be considered to be optional unless otherwise stated.
- Each component or feature may be embodied in a form that is not combined with other components or features.
- some components and / or features may be combined to form an embodiment of the present invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
- the base station has a meaning as a terminal node of the network that directly communicates with the terminal.
- the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
- a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like.
- the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
- the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.
- Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
- GSM Global System for Mobile communications
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
- LTE-A Advanced
- WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on the 3GPP LTE and LTE-A standards, but the technical spirit of the present invention is not limited thereto.
- E-UMTS is also called LTE system.
- LTE Long Term Evolution
- UMTS and E-UMTS refer to Release 7 and Release 8 of the "3rd Generation Partnership Project; Technical Specification Group Radio Access Network", respectively.
- an E-UMTS is located at an end of a user equipment (UE) 120, a base station (eNode B; eNB) 110a and 110b, and a network (E-UTRAN) to be connected to an external network.
- Access Gateway (AG) The base station may transmit multiple data streams simultaneously for broadcast service, multicast service and / or unicast service.
- One or more cells exist in one base station.
- the cell may be set to one of bandwidths such as 1.25, 2.5, 5, 10, 15, and 20 MHz. Different cells can provide different bandwidths.
- the base station controls data transmission and reception for a plurality of terminals.
- the base station For downlink (DL) data, the base station transmits downlink scheduling information to inform the corresponding UE of time / frequency domain, encoding, data size, and HARQ (Hybrid Automatic Repeat and reQuest) related information. In addition, the base station transmits uplink scheduling information to the terminal for uplink (UL) data and informs the time / frequency domain, encoding, data size, HARQ related information, etc. that the terminal can use.
- the core network (CN) may be composed of an AG and a network node for user registration of the terminal.
- the AG manages the mobility of the UE in units of a tracking area (TA) composed of a plurality of cells.
- FIG. 2 shows a structure of a control plane and a user plane of a radio interface protocol between a terminal and an E-UTRAN based on the 3GPP radio access network standard.
- the control plane means a path through which control messages used by the terminal and the network to manage a call are transmitted.
- the user plane refers to a path through which data generated at an application layer, for example, voice data or Internet packet data, is transmitted.
- the physical layer which is the first layer, provides an information transfer service to an upper layer by using a physical channel.
- the physical layer is connected to the upper medium access control (MAC) layer through a transport channel. Data moves between the MAC and PHY layers over the transport channel. Data moves between the transmitting and receiving PHY layers through the physical channel.
- the physical channel uses time and frequency as radio resources. Specifically, the physical channel is modulated by the OFDMA scheme in the downlink and modulated by the SC-FDMA scheme in the uplink.
- the media access control layer of the second layer provides a service to a radio link control (RLC) layer, which is a higher layer, through a logical channel.
- RLC radio link control
- the RLC layer of the second layer supports reliable data transmission.
- the function of the RLC layer may be implemented as a functional block inside the MAC.
- the PDCP (Packet Data Convergence Protocol) layer of the second layer performs a header compression function to reduce unnecessary control information for efficiently transmitting IP packets such as IPv4 or IPv6 in a narrow bandwidth wireless interface.
- IPv4 Packet Data Convergence Protocol
- the Radio Resource Control (RRC) layer located at the bottom of the third layer is defined only in the control plane.
- the RRC layer is responsible for control of logical channels, transport channels, and physical channels in connection with configuration, reconfiguration, and release of radio bearers (RBs).
- RB means a service provided by the second layer for data transmission between the terminal and the network.
- the RRC layers of the UE and the network exchange RRC messages with each other. If there is an RRC connected (RRC Connected) between the UE and the RRC layer of the network, the UE is in an RRC connected mode, otherwise it is in an RRC idle mode.
- the non-access stratum (NAS) layer above the RRC layer performs functions such as session management and mobility management.
- FIG 3 illustrates a physical channel of the LTE system and signal transmission using the same.
- the UE When the UE is powered on or enters a new cell, the UE performs an initial cell search operation such as synchronizing with the base station (S301). To this end, the terminal receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station, synchronizes with the base station, and the cell identifier (ID) or the like. Information can be obtained. Thereafter, the terminal may receive a PBCH (Physical Broadcast Channel) from the base station to obtain broadcast information in the cell.
- P-SCH Primary Synchronization Channel
- S-SCH Secondary Synchronization Channel
- ID cell identifier
- the terminal may receive a PBCH (Physical Broadcast Channel) from the base station to obtain broadcast information in the cell.
- PBCH Physical Broadcast Channel
- system information may be mentioned.
- the system information is broadcast repeatedly through the PBCH, and is necessary information for the UE to access the cell and operate in the cell.
- System information includes a master information block (MIB) and system information blocks (SIBs). Table 1 shows an example of the MIB.
- MIB master information block
- SIBs system information blocks
- the MIB includes a DL system bandwidth (DL BW), a Physical Hybrid-ARQ Indicator Channel (PHICH) configuration, and a system frame number (SFN).
- DL BW DL system bandwidth
- PHICH Physical Hybrid-ARQ Indicator Channel
- SFN system frame number
- 10 bits are not used and are reserved as a reserved field.
- the UE can know the information on the DL BW, SFN, PHICH configuration explicitly by receiving the MIB.
- the PHICH configuration includes information on the number of OFDM symbols occupied by the PHICH region and the amount of resources reserved for the PHICH in the control region.
- the PHICH is transmitted on the first m (m ⁇ 1) OFDM symbols of each subframe.
- PHICH and other control signals are transmitted through specific resource elements in the first n OFDM symbols of the corresponding subframe.
- the physical downlink control channel (PDCCH) is transmitted through REs except for REs in which the above-described PHICH and PCFICH are transmitted in the n OFDM symbols of a subframe. Therefore, in order to receive scheduling information through the PDCCH of each subframe, the UE needs to know how PHICHs of the subframes are mapped.
- the UE Upon completion of the initial cell search, the UE acquires more specific system information by receiving a physical downlink control channel (PDSCH) according to a physical downlink control channel (PDCCH) and information on the PDCCH. It may be (S302).
- PDSCH physical downlink control channel
- PDCCH physical downlink control channel
- the terminal may perform a random access procedure (RACH) for the base station (steps S303 to S306).
- RACH random access procedure
- the UE may transmit a specific sequence to the preamble through a physical random access channel (PRACH) (S303 and S305), and receive a response message for the preamble through the PDCCH and the corresponding PDSCH ( S304 and S306).
- PRACH physical random access channel
- a contention resolution procedure may be additionally performed.
- the UE After performing the above-described procedure, the UE performs a PDCCH / PDSCH reception (S307) and a physical uplink shared channel (PUSCH) / physical uplink control channel (Physical Uplink) as a general uplink / downlink signal transmission procedure.
- Control Channel (PUCCH) transmission (S308) may be performed.
- the control information transmitted by the terminal to the base station through the uplink or received by the terminal from the base station includes a downlink / uplink ACK / NACK signal, a channel quality indicator (CQI), a precoding ⁇ matrix index (PMI), and a scheduling request (SR). And RI (Rank Indicator).
- the terminal may transmit the above-described control information such as CQI / PMI / RI through the PUSCH and / or PUCCH.
- FIG. 4 illustrates a structure of a radio frame used in LTE.
- a radio frame has a length of 10 ms (327200? Ts) and consists of 10 equally sized subframes.
- Each subframe has a length of 1 ms and consists of two slots.
- Each slot has a length of 0.5ms (15360? Ts).
- the slot includes a plurality of OFDM symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain.
- one resource block includes 12 subcarriers x 7 (6) OFDM symbols.
- a transmission time interval which is a unit time in which data is transmitted, may be determined in units of one or more subframes.
- the structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, and the number of OFDM symbols included in the slot may be variously changed.
- 5 illustrates a resource grid for a downlink slot.
- the downlink slot includes a plurality of OFDM symbols in the time domain and includes a plurality of resource blocks in the frequency domain.
- FIG. 5 illustrates that the downlink slot includes 7 OFDM symbols and the resource block includes 12 subcarriers, but is not limited thereto.
- the number of OFDM symbols included in the downlink slot may be modified according to the length of a cyclic prefix (CP).
- CP cyclic prefix
- Each cell on the resource grid is called a resource element.
- One resource block includes 12 ⁇ 7 resource elements.
- the number NDL of resource blocks included in a downlink slot depends on a downlink transmission bandwidth set in a cell.
- FIG. 6 illustrates a structure of a downlink subframe.
- up to three (4) OFDM symbols located at the front of the first slot of a subframe correspond to a control region to which a control channel is allocated.
- the remaining OFDM symbols correspond to data regions to which the Physical Downlink Shared CHannel (PDSCH) is allocated.
- Examples of a downlink control channel used in LTE include a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Hybrid ARQ Indicator Channel (PHICH), and the like.
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols used for transmission of a control channel within the subframe.
- the PHICH carries a HARQ ACK / NACK (Hybrid Automatic Repeat request acknowledgment / negative-acknowledgment) signal in response to uplink transmission.
- DCI downlink control information
- the DCI format is defined as format 0 for uplink, formats 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, and so on for downlink.
- the DCI format includes a hopping flag, RB assignment, modulation coding scheme (MCS), redundancy version (RV), new data indicator (NDI), transmit power control (TPC), and cyclic shift DM RS, depending on the application.
- MCS modulation coding scheme
- RV redundancy version
- NDI new data indicator
- TPC transmit power control
- Information including a reference signal (CQI), a channel quality information (CQI) request, a HARQ process number, a transmitted precoding matrix indicator (TPMI), and a precoding matrix indicator (PMI) confirmation are optionally included.
- CQI reference signal
- CQI channel quality information
- TPMI transmitted precoding matrix indicator
- PMI pre
- the PDCCH includes a transmission format and resource allocation information of a downlink shared channel (DL-SCH), a transmission format and resource allocation information of an uplink shared channel (UL-SCH), a paging channel, Resource allocation information of upper-layer control messages such as paging information on PCH), system information on DL-SCH, random access response transmitted on PDSCH, Tx power control command set for individual terminals in terminal group, Tx power control command , The activation instruction information of the Voice over IP (VoIP).
- a plurality of PDCCHs may be transmitted in the control region.
- the terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCEs control channel elements
- the CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on radio channel conditions.
- the CCE corresponds to a plurality of resource element groups (REGs).
- the format of the PDCCH and the number of PDCCH bits are determined according to the number of CCEs.
- the base station determines the PDCCH format according to the DCI to be transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
- the CRC is masked with an identifier (eg, a radio network temporary identifier (RNTI)) according to the owner or purpose of use of the PDCCH.
- RNTI radio network temporary identifier
- an identifier eg, cell-RNTI (C-RNTI)
- C-RNTI cell-RNTI
- P-RNTI paging-RNTI
- SI-RNTI system information RNTI
- RA-RNTI random access-RNTI
- FIG. 7 is a diagram illustrating an example of a heterogeneous network system including a macro cell and a femto cell.
- Macro cell has a wide coverage and high transmit power, and refers to a general base station of a wireless communication system.
- the macro cell may be referred to as a macro base station.
- a femto cell is a small version of a macro cell that works independently while performing most of the macro cell's functions.
- the femto cell may be referred to as a femto base station, a micro cell, a pico cell, a home base station, a relay, or the like.
- the femto cell may be installed in an area covered by the macro cell or non-overlayed in a shaded area not covered by the macro cell.
- a femto cell can accommodate fewer terminals with narrower coverage and lower transmit power than a macro cell.
- the terminal may be served from the macro cell or femto cell according to the communication environment with the macro cell and femto cell.
- the coverage 701 of the macro cell includes all of the femto cell's coverage 703, but may also include only a portion of the femto cell's coverage.
- the communication environment of the terminal and the femto cell may be better than the communication environment of the terminal and the macro cell.
- the terminal receives a service from the femto cell.
- CRE Cell range expansion
- problems may arise due to differences between macro cells and femto cells. For example, problems may arise due to transmission power asymmetry in uplink and downlink.
- the UE selects a cell having the maximum RSRP (Reference Signal Received Power) as the serving cell, the downlink coverage of the macro cell is wider than that of the femto cell due to the difference in transmit power of each of the macro cell and the femto cell. Occupy.
- the transmitter since the transmitter is a terminal in uplink, it has a different coverage from that in downlink. Therefore, the optimal cell selection scheme in downlink is different from the uplink.
- femto cells are optimal cells
- some terminals may access the macro cells and cause interference problems to the femto cells.
- a problem may occur because the number of terminals connected to the femto cell is smaller than the number of terminals connected to the macro cell.
- the terminal is located in the coverage of the macro cell as shown in FIG. 7, the terminal is handed over from the macro cell to the femto cell for Quality of Service (QOS) of the entire network, that is, according to the CRE technique.
- QOS Quality of Service
- the UE may handover to the femtocell through the CRE even when the received signal power from the macro cell is 10db larger than the received signal power from the femtocell.
- the PBCH interference cancellation method is a method in which the UE detects a MIB transmitted through the PBCH of the macro cell and removes it from all received signals to detect the MIB of the femtocell. This method has a disadvantage in that it is not applicable in the case of a non-synchronous method. In addition, since the transmission power ratio of the PBCH to the cell specific reference signal (CRS) is unknown, it is difficult to accurately remove the MIB of the macro cell.
- CRS cell specific reference signal
- the second method is a method in which a macro cell transmits a femtocell's MIB as a UE specific signal (for example, through a downlink shared channel) to the terminal.
- a macro cell transmits a femtocell's MIB as a UE specific signal (for example, through a downlink shared channel) to the terminal.
- the MIB of the femto cell can be obtained accurately.
- the femtocell's MIB is changed after the UE is handed over from the macro cell to the femto cell, the macro cell has a problem in that it is difficult to transmit the changed MIB to the UE.
- the PHICH setting is likely to be changed compared to other information.
- the macro cell has wider coverage than the femto cell, and since a plurality of terminals are connected, there is less need to change the PHICH configuration.
- the femto cell has a very small number of terminals connected to the macro cell, the number of symbols in the control region may be changed, and accordingly, it may be necessary to dynamically change the PHICH configuration.
- the terminal handovered to the femto cell by receiving the MIB of the femto cell from the macro cell as a terminal specific signal is difficult to receive the changed PHICH configuration after the handover.
- the UE needs to know a time point (eg, offset information) to which the changed PHICH setting is applied.
- FIG. 8 is a flowchart illustrating a method of receiving control information of a terminal according to an embodiment of the present invention.
- a method of receiving a changed PHICH configuration information or offset information when a terminal handovered from a macro cell to a femto cell according to a CRE is changed after the PHICH is changed.
- a terminal accessing a macro cell in a heterogeneous network environment receives first PHICH configuration information for a femto cell from the macro cell (S801).
- a UE accessing a macro cell may handover from a macro cell to a femto cell when CRE is required.
- the macro cell may transmit a handover request message to the femto base station and receive information necessary for handover in response thereto. Thereafter, the macro base station transmits information required for handover to the terminal.
- the information required for handover may include the femtocell's MIB, and in the present invention, the terminal receives the femtocell's MIB as a terminal specific signal from the macro cell.
- the MIB of the femto cell includes first PHICH configuration information, downlink bandwidth, and system frame number for the femto cell.
- the terminal receiving the first PHICH configuration information is handed over to the femto cell (S803).
- the terminal then performs a handover to the femto cell.
- the terminal performs network entry into the femto cell based on information required for handover received from the macro base station.
- the terminal may communicate with the macro base station in a section in which the terminal can communicate with the macro base station.
- the femto cell may notify the completion of the handover to the macro cell. Thereafter, the terminal releases the link with the macro cell and establishes a link with the femto cell.
- the terminal sets the PHICH interval to the first number of OFDM symbols according to the first PHICH configuration information after the handover (S805).
- the PHICH section represents a section in which the PHICH is transmitted among the OFDM symbols of each subframe.
- the UE since the PDCCH is transmitted through REs except for REs in which PHICH and PCFICH are transmitted, the UE may receive scheduling information through the PDCCH in the RE, not in the PHICH period.
- the UE handing over from the macro cell to the femto cell according to the CRE may receive the changed PHICH configuration by the method described below.
- the terminal receives the second PHICH configuration information from the femto cell through the downlink shared channel (DL-SCH) (S807).
- the method for the UE to receive the second PHICH configuration information from the femto cell may be performed as follows.
- the femto cell may transmit changed PHICH configuration information (second PHICH configuration information) to the terminal using a MAC-CE (control element).
- second PHICH configuration information changed PHICH configuration information
- the DL-SCH LCID may be configured as shown in FIG. 8.
- the Logical Channel ID (LCID) indicates information included in the MAC-CE corresponding to each LCID field.
- index 01011 of the LCID field indicates that the corresponding MAC-CE includes PHICH resetting information.
- the second PHICH configuration information may be mapped to OCT (octet) 1 of the MAC-CE as a length of 3 bits.
- OCT octet
- three bits of second PHICH configuration information may indicate the number of OFDM symbols occupied by the PHICH region, and two bits may indicate the amount of resources reserved for the PHICH in the control region. That is, the terminal may receive second PHICH configuration information which is information on the changed PHICH configuration using the MAC-CE of FIG. 10.
- the femtocell may transmit not only the second PHICH configuration information but also offset information indicating a time point at which the second PHICH configuration information is applied to the terminal.
- the terminal may apply the changed PHICH configuration at the same time as other terminals receiving the PHICH configuration (MIB) through the PBCH from the femto cell by obtaining the offset information.
- MIB PHICH configuration
- FIG. 11 is a diagram illustrating an example of a MAC-CE including second PHICH configuration information and offset information.
- second PHICH configuration information having a 3-bit length and offset information (TTI-Offset) having a 5-bit length may be mapped to OCT 1 of the MAC-CE.
- the femto cell may receive PHICH configuration information or offset information using an RRC message. For example, the femto cell may map and transmit the second PHICH configuration information or offset information to a reserved area among SIB type 1 to SIB type 13. In addition, the femtocell may map PHICH configuration information or offset information to a reserved area of the RRC signaling message and transmit the mapping.
- FIG. 12 illustrates a base station and a terminal that can be applied to an embodiment of the present invention.
- a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120.
- BS base station
- UE terminal
- Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116.
- the processor 112 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 114 is connected to the processor 112 and stores various information related to the operation of the processor 112.
- the RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal.
- the terminal 120 includes a processor 122, a memory 124, and an RF unit 126.
- the processor 122 may be configured to implement the procedures and / or methods proposed by the present invention.
- the memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122.
- the RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
- the base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.
- each component or feature is to be considered optional unless stated otherwise.
- Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
- the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
- embodiments of the present invention have been mainly described based on data transmission / reception relations between a terminal and a base station.
- Certain operations described in this document as being performed by a base station may in some cases be performed by an upper node thereof. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
- the terminal may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
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Abstract
Description
Claims (15)
- 매크로 셀과 펨토 셀을 포함하는 이종 네트워크 시스템에서 단말이 제어 정보를 수신하는 방법에 있어서,매크로 셀로부터 펨토 셀에 대한 제1 PHICH(Physical Hybrid-ARQ Indicator Channel) 설정 정보를 수신하는 단계;상기 매크로 셀로부터 상기 펨토 셀로 핸드오버를 수행하는 단계;상기 핸드오버 이후 상기 제1 PHICH 설정 정보에 따라 PHICH 구간을 제1 개수의 OFDM(Orthogonal Frequency Division Multiplexing) 심볼로 설정하는 단계;상기 펨토 셀로부터 제2 PHICH 설정 정보를 하향링크 공유 채널(DL-SCH)을 통해 수신하는 단계; 및상기 PHICH 구간을 상기 제2 PHICH 설정 정보에 따라 제2 개수의 OFDM 심볼로 재설정하는 단계를 포함하는, 제어 정보 수신 방법.
- 제1항에 있어서,상기 제2 PHICH 설정 정보가 적용되는 시점을 나타내는 오프셋 정보를 상기 펨토 셀로부터 상기 하향링크 공유 채널을 통해 수신하는 단계를 더 포함하는, 제어 정보 수신 방법.
- 제1항에 있어서,상기 제2 PHICH 설정 정보는 MAC(Medium Access Control) 제어 요소(control element)를 통하여 수신되는, 제어 정보 수신 방법.
- 제2항에 있어서,상기 오프셋 정보는 MAC(Medium Access Control) 제어 요소(control element)를 통하여 수신되는, 제어 정보 수신 방법.
- 제1항에 있어서,상기 제2 PHICH 설정 정보는 RRC(Radio Resource Control) 메시지를 통하여 수신되는, 제어 정보 수신 방법.
- 제2항에 있어서,상기 오프셋 정보는 RRC(Radio Resource Control) 메시지를 통하여 수신되는, 제어 정보 수신 방법.
- 제1항에 있어서,상기 단말과 상기 펨토 셀 사이의 수신 신호 강도는 상기 단말과 상기 매크로 셀 사이의 수신 신호 강도보다 작고, 상기 단말은 셀 영역 확장(Cell Range Expansion)을 위하여 상기 매크로 셀로부터 상기 펨토 셀로 핸드오버하는, 제어 정보 수신 방법.
- 제1항에 있어서,상기 하향링크 공유 채널은 상기 단말에 특정된 채널인, 제어 정보 수신 방법.
- 매크로 셀과 펨토 셀을 포함하는 이종 네트워크 시스템에서 펨토 셀이 제어 정보를 전송하는 방법에 있어서,매크로 셀로부터 핸드오버된 단말로부터 하향링크 채널 신호 측정값을 포함하는 하향링크 채널 정보를 수신하는 단계;상기 하향링크 채널 신호 측정값이 기준값 이하이면 상기 단말로 PHICH(Physical Hybrid-ARQ Indicator Channel) 설정 정보를 하향링크 공유 채널(DL-SCH)을 통해 전송하는 단계를 포함하는, 제어 정보 전송 방법.
- 제9항에 있어서,상기 하향링크 채널 신호 측정값이 기준값보다 크면 상기 단말로 상기 PHICH 설정 정보를 물리 방송 채널(PBCH)를 통하여 전송하는 단계를 더 포함하는, 제어 정보 전송 방법.
- 제9항에 있어서,상기 PHICH 설정 정보가 적용되는 시점을 나타내는 오프셋 정보를 상기 단말로 전송하는 단계를 더 포함하는, 제어 정보 전송 방법.
- 제9항에 있어서,상기 PHICH 설정 정보는 MAC(Medium Access Control) 제어 요소(control element) 및 RRC(Radio Resource Control) 메시지 중 하나를 통하여 전송되는, 제어 정보 전송 방법.
- 제11항에 있어서,상기 오프셋 정보는 MAC(Medium Access Control) 제어 요소(control element) 및 RRC(Radio Resource Control) 메시지 중 하나를 통하여 전송되는, 제어 정보 전송 방법.
- 매크로 셀과 펨토 셀을 포함하는 이종 네트워크 시스템에서 제어 정보를 수신하는 단말에 있어서,RF(Radio Frequency) 유닛; 및프로세서를 포함하고,상기 프로세서는,매크로 셀로부터 펨토 셀에 대한 제1 PHICH(Physical Hybrid-ARQ Indicator Channel) 설정 정보를 수신하고,상기 매크로 셀로부터 상기 펨토 셀로 핸드오버를 수행하고,상기 핸드오버 이후 상기 제1 PHICH 설정 정보에 따라 PHICH 구간을 제1 개수의 OFDM(Orthogonal Frequency Division Multiplexing) 심볼로 설정하고,상기 펨토 셀로부터 제2 PHICH 설정 정보를 하향링크 공유 채널(DL-SCH)을 통해 수신하고,상기 PHICH 구간을 상기 제2 PHICH 설정 정보에 따라 제2 개수의 OFDM 심볼로 재설정하도록 구성되는, 단말.
- 매크로 셀과 펨토 셀을 포함하는 이종 네트워크 시스템에서 제어 정보를 전송하는 펨토 셀에 있어서,RF(Radio Frequency) 유닛; 및프로세서를 포함하고,상기 프로세서는,매크로 셀로부터 핸드오버된 단말로부터 하향링크 채널 신호 측정값을 포함하는 하향링크 채널 정보를 수신하고,상기 하향링크 채널 신호 측정값이 기준값 이하이면 상기 단말로 PHICH(Physical Hybrid-ARQ Indicator Channel) 설정 정보를 하향링크 공유 채널(DL-SCH)을 통해 전송하도록 구성되는, 단말.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100133489A (ko) * | 2008-04-15 | 2010-12-21 | 콸콤 인코포레이티드 | 무선 통신 환경에서 물리적 harq 표시자 채널(phich) 자원 할당 시그널링 |
KR20110063279A (ko) * | 2009-12-02 | 2011-06-10 | 엘지전자 주식회사 | 이종망을 지원하는 무선 통신 시스템에서 간섭 완화 방법 및 장치 |
KR20110074747A (ko) * | 2008-10-01 | 2011-07-01 | 엘지전자 주식회사 | 서브프레임의 무선자원 할당 방법 및 장치 |
KR20120007997A (ko) * | 2010-07-15 | 2012-01-25 | 한국전자통신연구원 | 소형 셀 커버리지 확장을 위한 기지국 및 단말의 간섭 제어 방법 |
KR20120010645A (ko) * | 2010-07-22 | 2012-02-06 | 주식회사 팬택 | 다중 요소 반송파 시스템에서 핸드오버의 수행장치 및 방법 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2338307A1 (en) * | 2008-08-08 | 2011-06-29 | Nokia Siemens Networks Oy | Fine-grain and backward-compliant resource allocation |
US20120122472A1 (en) * | 2010-11-12 | 2012-05-17 | Motorola Mobility, Inc. | Positioning Reference Signal Assistance Data Signaling for Enhanced Interference Coordination in a Wireless Communication Network |
KR20120077432A (ko) * | 2010-12-30 | 2012-07-10 | 주식회사 팬택 | 셀 간 간섭 조정 요청 방법과 장치 및 간섭 조정 요청의 처리 장치 및 방법 |
US8792462B2 (en) * | 2012-06-11 | 2014-07-29 | Telefonaktiebolaget L M Ericsson (Publ) | Radio base station and method for switching TTI bundling |
-
2013
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20100133489A (ko) * | 2008-04-15 | 2010-12-21 | 콸콤 인코포레이티드 | 무선 통신 환경에서 물리적 harq 표시자 채널(phich) 자원 할당 시그널링 |
KR20110074747A (ko) * | 2008-10-01 | 2011-07-01 | 엘지전자 주식회사 | 서브프레임의 무선자원 할당 방법 및 장치 |
KR20110063279A (ko) * | 2009-12-02 | 2011-06-10 | 엘지전자 주식회사 | 이종망을 지원하는 무선 통신 시스템에서 간섭 완화 방법 및 장치 |
KR20120007997A (ko) * | 2010-07-15 | 2012-01-25 | 한국전자통신연구원 | 소형 셀 커버리지 확장을 위한 기지국 및 단말의 간섭 제어 방법 |
KR20120010645A (ko) * | 2010-07-22 | 2012-02-06 | 주식회사 팬택 | 다중 요소 반송파 시스템에서 핸드오버의 수행장치 및 방법 |
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