WO2011021814A2 - 무선통신시스템에서 데이터 송수신 방법 및 시스템 - Google Patents
무선통신시스템에서 데이터 송수신 방법 및 시스템 Download PDFInfo
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- WO2011021814A2 WO2011021814A2 PCT/KR2010/005374 KR2010005374W WO2011021814A2 WO 2011021814 A2 WO2011021814 A2 WO 2011021814A2 KR 2010005374 W KR2010005374 W KR 2010005374W WO 2011021814 A2 WO2011021814 A2 WO 2011021814A2
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- drx
- relay
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- information
- component carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- the present disclosure relates to a wireless communication system, and more particularly, to a discontinuous reception method and system for transmitting and receiving data in a wireless communication system.
- communication service providers are continuously attempting to expand the existing communication service market by creating a new communication service market for wireless terminals and providing reliable and inexpensive services.
- the present specification discloses a method and system for discontinuous reception (DRX) for data transmission and reception in a wireless communication system.
- DRX discontinuous reception
- the present disclosure also provides a method and system for performing a DRX operation on at least one component carrier in a wireless communication system.
- the present specification provides a method and system for transmitting a DRX parameter for two or more CCs to the terminal by the base station and the relay in a wireless communication system.
- the present specification provides a parameter for controlling the discontinuous reception (DRX) of the second component carrier, which is distinguished from the parameter for controlling the discontinuous reception (DRX) of the specific first component carrier used by the base station in the wireless communication system.
- the present invention provides a method and system for transmitting / receiving data through discontinuous reception.
- the present disclosure provides a method and system for adaptively controlling a cycle and an operation time for performing a DRX operation on at least one component carrier in a wireless communication system.
- the present disclosure provides a method and system for setting the same DRX cycle and operation time for at least one component carrier in a wireless communication system.
- the present disclosure provides a method and system for independently setting the DRX cycle and operation time of each component carrier for at least one component carrier in a wireless communication system.
- the present specification is a method for setting so that at least one information of the DRX period, activation time, or operation time of one CC in a wireless communication system is a multiple of the DRX period, activation time, or operation time of another CC And a system.
- the control information of another second component carrier which is distinguished from the specific first component carrier used for transmission by the base station or And generating at least one of system information, and transmitting at least one of control information or system information of the generated second component carrier to the terminal.
- the base station generates at least one of control information or system information of a specific first component carrier, and the base station transmits at least one of the generated control information or system information of the first component carrier to the terminal And generating, by the relay, at least one of control information or system information of another second CC, which is distinguished from the first CC, in consideration of the channel state or link performance of the UE.
- a method for transmitting information in a wireless communication system comprising transmitting at least one of control information or system information of a two-element carrier.
- controlling the DRX of the first CC according to at least one of discontinuous reception (DRX) related control information or system information of the first CC received from the base station, and from the relay, Receiving at least one of DRX-related control information or system information of the second CC, which is distinguished from the CC, and at least one of DRX-related control information or system information of the first CC, received from the base station; It provides a data receiving method of the terminal comprising the step of controlling the DRX of the component carrier.
- DRX discontinuous reception
- a user terminal for controlling the DRX mode for the first component carrier and the second component carrier, receiving from the base station DRX-related control information or system information of the first component carrier, and from the base station
- the DRX cycle and operation time are set using the received information, and the DRX cycle and operation at the first CC are received by receiving DRX control information or system information of the second CC from a relay.
- a DRX setting unit for adjusting a DRX cycle and an operation time of a second CC using the time and the received information, and whether the DRX cycle and an operation time of the first CC and the second CC are identical
- the control unit determines the DRX of the first CC and the second CC.
- FIG. 1 is a block diagram illustrating a wireless communication system to which embodiments of the present invention are applied.
- 3 is a basic DRX structure for paging.
- FIG. 4 is a configuration diagram of an example of a relay network.
- 5 is a data transmission structure considering a relay system.
- FIG. 6 is a diagram of DRX structure according to CCs.
- FIG. 8 is a flowchart illustrating transmission of component carrier related information in consideration of a relay in a wireless communication system.
- 9 to 11 are views in which the terminal receives DRX related information of a second CC from a relay to adjust a DRX period and an on duration in a standby mode.
- FIGS. 12 and 13 are diagrams for controlling a DRX cycle and an on duration by receiving a DRX related information of a second CC from a relay in a connected mode.
- FIG. 14 is a diagram illustrating a process of controlling DRX in a terminal according to one embodiment of the present specification.
- FIG. 1 is a block diagram illustrating a wireless communication system to which embodiments of the present invention are applied.
- Wireless communication systems are widely deployed to provide various communication services such as voice and packet data.
- a wireless communication system includes a user equipment (UE) 10 and a base station 20 (BS).
- the terminal 10 and the base station 20 use various information transmission methods and power control methods described below.
- Terminal 10 in the present specification is a generic concept that means a user terminal in wireless communication, WCDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal) in GSM ), SS (Subscriber Station), wireless device (wireless device), etc. should be interpreted as including the concept.
- WCDMA Wideband Code Division Multiple Access
- UE User Equipment
- HSPA High Speed Packet Access
- MS Mobile Station
- UT User Terminal
- SS Subscriber Station
- wireless device wireless device
- the base station 20 or cell generally refers to a fixed station communicating with the terminal 10, and includes a Node-B, an evolved NodeB, an Base Transceiver System (BTS), It may be called other terms such as an access point.
- BTS Base Transceiver System
- the base station 20 or the cell should be interpreted in a comprehensive sense indicating some areas covered by the base station controller (BSC) in the CDMA, the NodeB of the WCDMA, and the like. It is meant to encompass various coverage areas such as microcells, picocells, femtocells, etc.
- BSC base station controller
- the terminal 10 and the base station 20 are two transmitting and receiving entities used to implement the technology or technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to. .
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- FDMA Frequency Division Multiple Access
- OFDMA Orthogonal Frequency Division Multiple Access
- OFDM-FDMA OFDM-FDMA
- OFDM-TDMA OFDM-TDMA
- OFDM-CDMA OFDM-CDMA
- the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
- TDD time division duplex
- FDD frequency division duplex
- One embodiment of the present invention provides asynchronous wireless communication that evolves into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB). Applicable to resource allocation.
- LTE Long Term Evolution
- LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB.
- Applicable to resource allocation Applicable to resource allocation.
- the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
- FIG. 2 illustrates states of a terminal to which the present invention is applied.
- the terminal 10 may operate in two modes, such as a connected mode 100 and an idle mode 110.
- the connection mode 100 is an activated state of the terminal 10.
- the terminal 10 is connected to a specific base station 20 in the network.
- one or more IP addresses as well as identification information of the terminal 10 are allocated to the terminal 10.
- the uplink may or may not be synchronized with the network.
- the base station 20 or the receiver of the base station 20 respectively measures the arrival time of the transmission from the activated terminal 10 and is time-corrected with the downlink. command) can be sent. While the uplink is synchronized, transmission of user data on the downlink and Layer 1 (physical layer) / Layer 2 (MAC or RRC, RLC, PDCP layer, etc.) control signaling are possible.
- Layer 1 physical layer
- Layer 2 Layer 2
- uplink transmissions do not occur within a given time window, then time allocation is not possible and the uplink declares asynchronous. In this case, the UE must perform a random access procedure to resume uplink synchronization.
- the standby mode 110 is a low activity state in which the terminal 10 sleeps most of the time in order to reduce battery consumption.
- standby mode 110 uplink synchronization is not maintained and thus the only uplink transmission activity that may occur is random access to move to connected mode 100.
- the terminal 10 may periodically wake up to be paged on an incoming incoming call.
- the terminal 10 maintains its IP address or other internal information so that the terminal 10 can quickly move to the connected mode 100 when needed.
- FIG. 3 is a structure illustrating a concept of a DRX to which the present invention is applied.
- paging can be used for connected setup.
- An effective paging process is that the terminal 10 sleeps most of the time and wakes up briefly for a given time to monitor paging information from the network.
- a separate channel for example, a paging indicator channel, may be used to inform the terminal 10 that paging information is transmitted, and the same operation as that of normal downlink data transmission may be used.
- the terminal 10 may monitor the L1 / L2 control signaling for downlink scheduling allocation.
- the DRX operation discontinuous Reception mechanism
- the terminal 10 is asleep most of the time and only wakes up briefly to monitor L1 / L2 control signaling.
- the terminal 10 may process a corresponding downlink paging message transmitted on a paging channel.
- the paging message includes a paged terminal ID and the terminal 10 which does not find its ID, ignores the received information and sleeps according to the DRX cycle.
- the basic operation for the DRX is operated by the configured DRX cycle, and when the DRX cycle is set, the UE 10 monitors downlink control signaling for one subframe per DRX cycle and receives or receives the remaining subframes for the remaining subframes.
- the circuit is turned off to operate in standby. The longer the DRX cycle, the lower the power consumption of the terminal.
- the terminal 10 Since it is impossible to transmit all the data in the transmission buffer in one subframe, additional subframes are needed. Therefore, the terminal 10 maintains an active state for a settable time. Start the activation timer and stay awake until the time expires. The long DRX cycle in which the UE wakes up for a certain period is sufficient to provide most communication services.
- a second short DRX cycle is optionally used with a long DRX cycle.
- the UE follows a long DRX cycle. However, if it is recently scheduled, it will follow a short DRX cycle for a period of time.
- DRX is a method of saving battery power of the terminal 10 and allocates a periodic DRX cycle to wake up periodically to each terminal 10.
- the reception modem of the terminal 10 may be turned on to receive information transmitted from the network.
- the receiver is turned off and the power saving mode is operated.
- Various DRX parameters are determined by the network, eg, base station or relay.
- the terminal 10 When the terminal 10 initially registers with the network, the terminal 10 may be allocated to the terminal 10 and, if necessary, the DRX parameter may be changed during operation.
- the DRX parameter includes a DRX cycle (DRX Cycle), which is a period in which DRX On-Duration (a section in which a terminal operates a modem to receive a signal at a predetermined time) periodically repeats according to a period of inactivity, and the terminal 10.
- DRX Cycle a DRX cycle
- Two parameters may be included, such as an active time representing the total amount of waking time.
- examples of detailed DRX parameters used in a wireless communication system are as follows.
- On-Duration Timer ( onDurationTimer ): Timer indicating On-Duration during DRX cycle.
- Inactivity Timer ( drx-InactivityTimer ): A timer for waking up the terminal 10 during a certain period in which data is transmitted even when the on-duration interval ends.
- the scheduling request of the terminal 10 is pending until an UL grant is received from the base station. Therefore, the terminal 10 receives a section in which a physical control format indicator channel (PDCCH) including UL grant information can be transmitted as an SR-pending timer parameter and monitors the PDCCH during the corresponding section.
- the PDCCH is mainly used for transmitting downlink control information such as scheduling decisions.
- UL retransmission Timer A timer indicating a PDCCH monitoring interval for receiving information of an UL grant for retransmission.
- DL retransmission Timer A timer indicating a retransmission interval for all downlink HARQ processes (eight retransmission timers).
- Short cycle timer A timer used when a short DRX cycle is configured, defined as a multiple of the minimum unit time at which control and system information is transmitted before a new short DRX cycle begins. For example, it may be defined as the number of transmit time intervals (TTIs).
- TTIs transmit time intervals
- carrier aggregation may be used in wireless communication to support a wider band. That is, the base station or cell 20 may use multiple component carriers to extend the transmission / reception band in the uplink and the downlink than before. In this case, all CCs may be set to be compatible with using only one band or carrier.
- One component carrier may be regarded as one wireless communication band before using a carrier aggregate.
- Relaying can be considered to improve high-speed data, group mobility, ad hoc network usage, cell edge throughput, and provide coverage for new areas.
- FIG. 4 is a configuration diagram of a network including a relay as an example of the present invention.
- a relay network or a network architecture considering a relay has a relay or relay node 30 between a terminal 10 and a base station 20 connected to a core network.
- Un means an air interface (Interface) defined between the relay 30 and the base station 20
- Uu means an air interface (Interface) defined between the terminal 10 and the relay 30.
- the relay 30 may have its own physical cell ID and may transmit its own synchronization channel and reference symbols or reference signals. In type I relays there is a wireless self backhauling between the donor cell and the relay.
- the relay 30 may be seen as a separate cell from the donor cell to the terminal 10.
- the terminal 10 receives scheduling information and HARQ feedback directly from the type I relay and transmits its control channel (SR / CQI / ACK) to the type I relay.
- the relay 30 cannot create any new cell without having a separate cell IP.
- the relay 30 may be relayed or relayed from the terminal 10. At least the terminal 10 may not know the presence of a type II relay.
- the wireless communication system described with reference to FIGS. 1 and 4 may be configured to include the terminal 10, the base station, and the relay 30, but not include the terminal 10, the base station, and the relay 30.
- the relay 30 may serve as a base station, and some of the terminals 10 may serve as the relay 30.
- a relay is used in a comprehensive sense as a subject used to implement a technology or a technical idea described herein, and is not limited by a term or word specifically referred to.
- the present specification in addition to the service requirements of the terminal 10 in the wireless communication system, when the component carrier (Component Carrier), the additional component carrier is assigned to the terminal 10 and the base station 20 ) Discloses a method of transmitting data to be transmitted to the terminal 10 using the relay 30.
- Component Carrier Component Carrier
- the relay receives the discontinuous reception (DRX) related information about the additional component carrier from the base station 20 to control the relay 30 or the relay in consideration of both the DRX related information received from the base station 20 and various system parameters. It can be determined by the control itself at 30 or controlled independently by the relay 30, for this purpose, a scheme for generating the system information or control information necessary for the terminal 10 in the relay 30 to transmit to the terminal 10. In this way, there is provided a method of operating the relay 30 and a wireless communication system for implementing the methods.
- the system information may be defined as information that the terminal should recognize among the information of the wireless communication system.
- the control information may be defined as information necessary for a component of a wireless communication system such as a terminal or a base station in a wireless communication system to request or support a change in algorithm or state.
- 5 is a data transmission structure considering a relay system according to an embodiment of the present invention.
- the terminal 10 in the idle mode, the terminal 10 is located in an area where control information is received from the base station 20 and camps on a corresponding cell through a link 1 (indicated by a dotted line). )do.
- camping means that the terminal 10 synchronizes with the base station 20, and the basic control information for communication with the base station includes a master information block (MIB), such as a physical broadcast channel (PBCH), and a physical PDSCH (PDSCH).
- MIB master information block
- PBCH physical broadcast channel
- PDSCH physical PDSCH
- SIB system information block
- SIB system information block
- the terminal 10 in the connected mode or the connected mode (connected mode), because the terminal 10 is not included in the data transmission range, or because it does not meet the service requirements, it can communicate via link 1 (dotted line notation). Therefore, it can communicate by sending / receiving data through link 2 (straight notation). At this time, the system information transmitted to the terminal 10 is set by the base station 20 and transmitted through the relay 30.
- the related information for DRX which is one of the system information, may be managed by the base station 20 and transferred through the relay 30.
- FIG. 6 is a diagram of DRX structure for component carriers according to another embodiment of the present invention.
- FIG. 6 is a diagram of DRX structure for component carriers according to another embodiment of the present invention.
- FIG. 6 it is an example of operation of the DRX method when using a plurality of CCs considered in a next generation communication system such as LTE-Advanced. 6 shows that the base station 20 operates in an independent DRX scheme for each CC.
- a system is formed by combining a plurality of component carriers which are discontinuous and may have different transmission ranges. Is adopted by the company.
- Each CC may be operated in the same form as an independent LTE communication system, and independent DRX may be operated for each CC. In this way, the effect of power saving, which is the basic goal of DRX, is hardly achieved.
- the relay It is difficult for the base station 20 to transmit the timing of the data transmitted through the component carrier transmitted by the 30 and the component carrier transmitted by the base station 20 as intended.
- the communication between the base station 20 and the relay 30 is also wireless communication, and various situations such as an error in transmission data may occur as the base station 20 allocates and operates radio resources to the terminal 10. Therefore, in order to achieve the power saving purpose of the DRX, the role of the base station as well as the role of the relay 30 must be further considered and resolved.
- a typical wireless communication system spatially divides an entire service area based on each base station serviceable area for resource efficient communication service and reuses the same time / frequency resources in the separated area.
- the wireless communication system may use a repeater or relay 30 to expand the service area while minimizing the service support and installation costs for the shaded areas where the mobile communication service is not smooth in the service area.
- a signal is demodulated and interpreted using a relay 30 instead of a repeater that simply amplifies and transmits the signal.
- a method of modulating and transmitting again a method of increasing the reliability of a signal to be transmitted and defining functions from the relay 30 to Layer 3 (using the same Radio Protocol as the eNB in the Uu section), not the base station, are separated from the base station.
- the additional component carrier when the additional component carrier is required according to the service requirement of the terminal 10 in the wireless communication system, the additional component carrier is allocated to the terminal 10 and the base station 20 uses the terminal 30 using the relay 30.
- the system information necessary for the terminal 10 and the data received from the base station 20 in the relay terminal 10) the information of the base station in the relay without the recognition of cooperative communication (cooperative communication) or the base station to share the mutual information between the base station 20 and the relay 30, the control information and system information for the additional element carrier to transmit to
- a mode in which the DRX method is used includes a standby mode (RRC_idle mode) and a connected mode (RRC_connected mode).
- the basic condition between the base station 20 and the relay 30 is that the relay 30 exchanges information with each other when the relay 30 first performs a self configuration by connecting to the network.
- the relay 30 follows the transmission algorithm of the base station 20 except for the case of impairing processing of the highest priority data such as emergency communication and stability of relay operation.
- the relay 30 receives parameters for implementing the transmission algorithm of the relay 30 from the base station 20.
- information is exchanged between the base station 20 and the relay 30 by using a cooperative communication or a cognitive communication method.
- a cooperative communication or a cognitive communication method When exchanging information between the base station 20 and the relay 30 may follow the previously defined communication protocol, and may define and follow a new communication protocol only for exchanging information between the base station 20 and the relay 30.
- FIG. 7 is a data transmission structure considering a relay system using component carriers according to the present invention.
- FIG. 7 conceptually illustrates a method of operating a relay in one example of an environment that may occur in a wireless communication system, for example, an LTE-Advanced system.
- the UE 10 camps on a cell in a standby mode (RRC_idle mode) and requests resource allocation to a cell in a connected mode (RRC_connected mode) to resource 1 element carrier. Can be assigned to communicate via link 1.
- RRC_idle mode a standby mode
- RRC_connected mode resource 1 element carrier.
- an additional resource allocation request is generated in the terminal 10, so that the resource for the first CC is insufficient and thus a resource needs to be allocated for the second CC.
- a situation occurs in which a situation of a component carrier channel currently used is not good and a resource allocation for a second component carrier CC2 occurs.
- the base station 20 transmits information through the second link rather than transmitting data to the terminal 10 by using the resource of the second CC (CC2) through the first link. It is determined by the cooperative communication or cognitive communication between the base station 20 and the relay 30 to be more efficient. Therefore, data transmission for the second CC (CC2) is transmitted over the second link.
- control information or system information related to DRX for the second component carrier CC2 transmitted through the relay 30 is transmitted from the base station 20 and the relay 30 during the second link.
- DRX-related information (DRX control information related to the second component carrier or DRX information related to the first component carrier) is transmitted in a cooperative communication or a cognitive communication method between the base station 20 and the relay 30 through a path between the relays.
- the 30 generates final DRX related information between the relay 30 and the terminal 10 by further considering the QoS of data serviced through the second CC and the link performance between the relay 30 and the terminal 10.
- the transmission is performed through the path between the terminal 10 and the relay 30 or the third broadcasting (broadcasting) path of the second link.
- the relay 30 generates various DRX related information including a wake-up cycle, and may be allocated to the terminal 10 when the terminal 10 is first registered in the network, and may change the DRX parameter during operation if necessary. have.
- the DRX parameters that can be changed may be, for example, the On-Duration Timer ( onDurationTimer ), Inactivity Timer ( drx-InactivityTimer ), SR-pending Timer, UL retransmission Timer, DL retransmission Timer, and Short cycle timer.
- onDurationTimer On-DurationTimer
- Inactivity Timer drx-InactivityTimer
- SR-pending Timer UL retransmission Timer
- DL retransmission Timer DL retransmission Timer
- Short cycle timer Short cycle timer
- FIG. 8 is a flowchart illustrating transmission of component carrier related information in consideration of a relay in a wireless communication system according to the present invention.
- the base station 20 transmits a packet to the terminal 10 through a first CC (CC1) (S10).
- the terminal 10 camps on the cell in the standby mode, requests resource allocation to the cell in the connected mode (RRC_connected mode), and allocates resources to the first CC. It may communicate with the base station 20 through a link between the terminal 10 and the link 10 (link 1 of FIG. 7).
- the terminal 10 receives a packet from the base station 20 through the first CC (CC1).
- the base station 20 is an additional component carrier (the second component carrier (CC2 of FIG. 7) It is determined whether to allocate resources for)) (S20).
- control information or system information related to DRX for the second component carrier CC2 transmitted through the relay 30 may include a path between the base station 20 and the relay 30.
- Link 2 of FIG. 7 through the cooperative or cognitive communication method between the base station 20 and the relay 30, for example, DRX control information of the second CC or the first CC.
- DRX related information is transmitted from the base station 20 to the relay 30 (S30).
- the relay 30 further considers the QoS of the data serviced through the second CC2, the link performance between the relay 30 and the terminal 10, and the like based on the DRX-related information.
- the final DRX related information between the terminals 10 is determined and generated (S40). That is, the relay 30 may process the DRX information received from the base station 20 through the processes S20, S30, and S40 between the base station 20 and the relay 30, or may provide the terminal 10 with the reflected signal. .
- the relay 30 adjusts to match the DRX period of two or more CCs in consideration of the received DRX information, that is, the terminal 10 adjusts the DRX cycle for the CCs, On Duration It can be controlled to match the interval.
- the processes S20, S30, and S40 between the base station 20 and the relay 30 do not need to be separately recognized (notified) by the terminal 10.
- the relay 30 transmits the CC 2 to the determined CC2 through the path between the terminal 10 and the relay 30 (path 2 in FIG. 7) or broadcast 3 times.
- Related information for example, DRX cycle or active time (active time) is transmitted to the terminal 10 (S50).
- the terminal 10 determines the DRX operation with reference to the related information about the second CC (CC2) received from the relay 30 (S60). That is, during the DRX cycle, the terminal 10 may turn on the receiving device or the receiving modem and receive data transmitted from the relay 30 for information on the second CC. In other sections, the receiver is turned off and the power saving mode (power saving mode).
- 9 to 11 are diagrams for adjusting a DRX cycle and an On duration interval by the UE in the standby mode according to the present invention.
- the base station 20 directly downloads DRX related information for the first CC (CC1) to the terminal 10.
- the base station 20 transmits the DRX related information of the first CC (CC1) and the control information of the second CC (CC2) to the relay (30).
- the relay 30 uses the second element based on the DRX related information of the first CC CC1 and the control information of the second CC CC2 received from the base station 20.
- DRX related information about the carrier CC2 is determined, and the DRX related information about the determined second CC is transmitted to the terminal 10.
- the DRX-related information on the second CC includes the DRX period of the second CC (CC2) corresponding to the DRX period and the on duration of the first CC (CC1) and its duration duration. .
- the terminal receives the DRX related information of the adjusted second CC from the relay and performs the DRX operation.
- the DRX-related information is transmitted from the base station 20 to the relay 30 in the standby mode. Accordingly, the relay 30 can match the DRX period between element carriers and match the On duration period by the terminal. .
- the terminal 10 may perform the DRX operation by matching the DRX cycle and the On duration period in the first CC and the CC. This will support the advantage of reducing the power consumption of the terminal.
- the base station 20 directly downloads DRX related information for the first CC (CC1) to the terminal 10.
- the base station 20 transmits the DRX related information of the first CC CC1 and the control information of the second CC CC2 to the relay 30.
- the relay 30 based on the DRX related information of the first CC CC1 and the control information of the second CC CC2 received from the base station 20.
- DRX related information about the carrier CC2 is determined, and the DRX related information about the determined second CC is transmitted to the terminal 10.
- the DRX-related information on the second CC matches the period in case the link performance between the relay 30 and the mobile communication terminal 10 is deteriorated and PDCCH reception is not acceptable (1).
- Increase the On duration interval (2) contains information. That is, the terminal 10 may match the DRX cycle in the first CC CC2 and the second CC CC2, and set a longer duration duration in the second CC CC2. Therefore, as the monitoring time of the second CC is longer, it is possible to prevent the reception of the PDCCH due to the deterioration of the link performance.
- the relay 30 selects a base station after the relay 30 changes the DRX cycle of the second CC CC to "short" (long-> short) in consideration of link performance and the like. 20 transmits DRX related information of the first component carrier CC1 and control information of the second component carrier CC2 to the relay 30.
- the relay 30 receives the DRX related information of the base station 20 and changes the DRX cycle of the second CC to "long" (short-> long).
- the relay 30 refers to DRX information of the first CC CC1 and control information of the second CC CC 2 received from the base station 20. Or use, but generate DRX-related information for the second CC (CC2) in consideration of the terminal and the link performance or channel state.
- the relay 30 transmits DRX related information on the generated second CC (CC2) to the terminal. That is, the terminal 10 sets the DRX cycle in the second CC as the first CC in a state where the DRX cycle in the second CC is shorter than the DRX period of the CC CC1. Can match the DRX cycle of (CC1).
- the change of the period of the DRX may be provided from the relay 30 to the terminal 10 through the DRX command.
- FIGS. 12 and 13 are diagrams illustrating how a terminal adjusts a DRX cycle and an on duration in a connected mode according to the present invention.
- the relay 30 receives the DRX period change control signal from the base station 20 (1) and controls the second CC (CC2) at a different period from the first CC (CC1) (1).
- the terminal 10 checks the DRX-related information of the second CC from the relay 30, that is, the information in which the On duration section is lengthened due to an increase in data, has the same DRX period, but sets the On duration section long. In addition, the monitoring time for data reception is increased. Therefore, the terminal 10 ensures the maximum reception rate so that there is no loss of data.
- the relay 30 when there is no data transmitted to the terminal 10 through the first CC (CC1) in the connected mode, when the emergency data is transmitted to the relay 30, the relay 30 is the base station 20 Receive a DRX period change control signal from (1) to control the second CC (CC2) at a different period from the first CC (CC1) and to increase the duration on its own (1). There is not much data transferred from the base station 20 to the relay 30 during the emergency data processing.
- the relay 30 determines to change the DRX cycle back to the DRX cycle and the on duration of the first CC (CC1) and notifies the terminal 10 of the DRX cycle (2). . Accordingly, the terminal 10 performs a DRX operation with a long DRX cycle according to the first CC.
- the terminal 10 of FIGS. 12 and 13 sets a longer duration duration or a DRX cycle in the DRX mode of the second CC CC2 in order to enable processing of emergency data or processing of a large amount of data. Can be set short. Of course, after the data processing is completed, it can be set to match the On duration interval length or the DRX period of the first CC (CC1). The change in the length of the On duration interval of the DRX may also be provided from the relay 30 to the terminal 10 through the aforementioned DRX command.
- FIG. 14 is a diagram illustrating a process of controlling DRX in the terminal 10 according to an embodiment of the present specification. This will be described in more detail with respect to the operation of the terminal described with reference to FIGS. 8, 9, 10, 11, 12, and 13.
- the terminal receives DRX related control information or system information of the first CC from the base station (S1410).
- the reception may further include receiving, by the terminal, DRX related control information and system information of the first CC from the base station through the relay.
- step S1410 the terminal sets the DRX cycle and operation time in the first CC using the received information (S1420).
- the terminal may maintain the DRX mode in the first CC. Thereafter, the terminal receives the DRX related control information or system information of the second CC from the relay (S1430).
- the relay may use information determined in steps S30 and S40 of FIG. 8, or information received from the base station in FIGS. 9, 10, 11, 12, and 13.
- the terminal uses the DRX cycle and operation time in the first CC, received from the base station, and the information received in step S1430, the DRX cycle in the second CC, received from the relay, active time (active time) And the operation time can be adjusted (S1440).
- the period, the active time and the active time of the adjustable DRX may be variously set.
- the active time means a time at which the PDCCH can be received.
- the setting may be applied using information previously determined by the relay before S1430 and transmitted from S1430.
- the terminal uses the information received from the relay, and through the steps S1450, S1460, and S1465, the DRX cycle of the second CC and the active time DRX operation time are determined by the DRX of the first CC. You can check whether the period, active time, and DRX operation time coincide with each other.
- the UE includes a DRX cycle for the first CC and the second CC.
- the operation time is matched to maintain the same DRX mode (S1472).
- the terminal may not receive PDCCH reception due to deterioration in link performance between the relay 30 and the mobile communication terminal 10 with respect to the DRX-related information on the CC2 received from the relay.
- the DRX periods of the first CC and the second CC may coincide, but the duration of the On duration, which is an operation time of the second CC, may be increased.
- the relay may set a long DRX operation time of the corresponding CC.
- the UE matches the DRX period for the first CC and the second CC, but the operation time is variable to maintain the DRX mode for the first CC and the second CC, respectively. It may be (S1474).
- the DRX cycle of the second CC may be shortened. Even in this case, a multiple of the period of the DRX of the second CC may be set to coincide with the DRX period of the first CC. Accordingly, when the DRX period does not coincide with the first CC and the second CC, for example, as shown in FIG. 13, the UE determines an operation time for the first CC and an operation time for the second CC. In operation S1476, the DRX mode may be maintained for the first CC and the second CC.
- the terminal checks the DRX cycle and DRX operation time of each component carrier, The DRX operation is performed according to the CC (S1478).
- DRX mode control on the second CC may exist, and according to the control of the relay, the terminal may newly define DRX parameters through S1472, S1474, S1476, and S1478. DRX operation can be performed by using.
- the UE may control the DRX mode for the first CC and the second CC.
- the DRX operation of the second CC may be controlled to operate by matching the DRX cycle, operation time, or DRX cycle and operation time of the first CC.
- the method may further include setting the active time to be equal to the DRX mode.
- the terminal may have a separate component, or may provide a setting and control function of the DRX mode among the components for wireless communication.
- the components providing the DRX setting and control function are referred to as a DRX setting unit and a DRX control unit, respectively.
- the DRX setting unit receives the DRX-related control information or system information of the first CC from the base station, and sets the DRX cycle and operation time in the first CC using the information received from the base station, and from the relay Receiving DRX-related control information or system information of the second CC, using the DRX cycle and operation time of the first CC, and the information received in step S1430, the DRX cycle of the second CC
- the DRX controller may control the DRX of the first CC and the second CC by determining whether the DRX cycle and the operation time of the first CC and the second CC are consistent.
- the DRX setting unit and the DRX control unit may be included in other components for wireless communication in the terminal.
- the base station may transmit control information or system information of some of the three or more CCs to the terminal, and the relay may transmit control information or system information of the remaining of the three or more CCs to the terminal. If the base station can use five component carriers having a bandwidth of 20 MHz, the control information or system information of the three component carriers are transmitted directly from the base station to the terminal, and the control information / system information of the two component carriers is generated from the relay. Can be transmitted to the terminal.
- the number of CCs used by the base station and the relay may be fixed or variable.
- the number of CCs used by the base station and the relay may be changed in consideration of link performance, channel state, number of subscribers, QoS, etc. of the base station and the terminal or the relay and the terminal.
- all external environments are the same, but control information and system information generated according to differences in the internal environment such as system operation method, terminal characteristics, and version may be different.
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Abstract
Description
Claims (25)
- 무선통신시스템에서 릴레이가 데이터를 전송하는 방법에 있어서,기지국에 의해 사용되는 특정 제 1 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터와 구별되는, 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 생성하는 단계; 및상기 생성된 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 단말에 전송하는 단계를 포함하는 릴레이의 데이터 전송방법.
- 제1항에 있어서,상기 기지국으로부터 상기 제 1 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터와, 상기 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터 중 적어도 하나를 수신하여, 상기 단말에 전송하는 단계를 더 포함함을 특징으로 하는 릴레이의 데이터 전송방법.
- 제1항에 있어서,상기 불연속 수신(DRX)을 제어하기 위한 파라미터는,DRX 주기, 활성화 시간(active time) 또는 DRX 동작 시간(on duration)에 대한 정보를 포함함을 특징으로 하는 릴레이의 데이터 전송방법.
- 제1항에 있어서,상기 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 생성하는 단계는,상기 기지국에 의해 사용되는 상기 제 1 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 참조하여, 상기 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 동일하게 설정하는 단계를 더 포함함을 특징으로 하는 릴레이의 데이터 전송방법.
- 제4항에 있어서,상기 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 생성하는 단계는,상기 단말의 채널상태 및 링크 성능 중 적어도 하나를 고려하고, 상기 제 1 요소반송파의 DRX 주기, 활성화 시간(active time) 또는 DRX 동작 시간(on duration)를 참조하여,상기 제 2 요소반송파의 DRX 주기를 상기 제 1 요소반송파의 DRX 주기와 동일하게 설정하거나, 또는 상기 제 2 요소반송파의 DRX 동작 시간(on duration)를 상기 제 1 요소반송파의 DRX 동작 시간(on duration)와 동일하게 설정하거나, 또는 상기 제 2 요소반송파의 DRX 주기와 DRX 동작 시간(on duration)를 상기 제 1 요소반송파의 DRX 주기와 DRX 동작 시간(on duration)와 동일하게 설정하는 단계를 더 포함함을 특징으로 하는 릴레이의 데이터 전송방법.
- 제5항에 있어서,상기 제 2 요소반송파의 불연속 수신(DRX)을 제어하기 위한 파라미터를 생성하는 단계는,상기 단말의 채널상태 및 링크 성능 중 적어도 하나를 고려하고, 상기 제 1 요소반송파의 DRX 주기, 활성화 시간(active time) 또는 DRX 동작 시간(on duration)를 참조하여,상기 제 2 요소반송파의 DRX 주기와 DRX 동작 시간(on duration)를 상기 제 1 요소반송파의 DRX 주기와 DRX 동작 시간(on duration)와 각각 상이하게 설정하는 단계를 더 포함함을 특징으로 하는 릴레이의 데이터 전송방법.
- 무선통신시스템에서 데이터를 전송하는 방법에 있어서,기지국이 특정 제 1 요소반송파의 불연속 수신(DRX)을 제어하기 위한 제어정보 및 시스템 정보 중 적어도 하나를 생성하는 단계;상기 기지국이 생성된 상기 제 1 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템 정보 중 적어도 하나를 단말에 전송하는 단계;릴레이는 단말의 채널상태 및 링크성능 중 적어도 하나를 고려하여, 상기 제 1 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템 정보 중 적어도 하나와 구별되는, 제 2 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템정보 중 적어도 하나를 생성하는 단계;상기 릴레이는 생성된 상기 제 2 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템정보 중 적어도 하나를 상기 단말에 전송하는 단계를 포함하는 무선통신시스템에서 데이터 전송방법.
- 제7항에 있어서,상기 릴레이는 상기 기지국으로부터 상기 제 1 요소반송파의 DRX를 제어하기 위한 제어정보 및 상기 제 2 요소반송파의 DRX를 제어하기 위한 제어정보와, 상기 제 1 요소반송파의 DRX를 제어하기 위한 시스템 정보 및 상기 제 2 요소반송파의 DRX를 제어하기 위한 시스템 정보 중 적어도 하나의 정보를 수신하는 단계를 더 포함하며,상기 제 2 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템정보 중 적어도 하나를 생성하는 단계는, 상기 릴레이가 상기 기지국으로부터 수신한 적어도 하나의 정보를 이용하여 상기 제 2 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템정보 중 적어도 하나를 생성하는 단계임을 특징으로 하는 무선통신시스템에서 데이터 전송방법.
- 제7항에 있어서,상기 릴레이가 단말의 채널상태 및 링크성능 중 적어도 하나를 고려하여, 상기 제 1 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템 정보 중 적어도 하나와 동일한, 제 2 요소반송파의 DRX를 제어하기 위한 제어정보 및 시스템정보 중 적어도 하나를 생성하는 단계를 더 포함함을 특징으로 하는 무선통신시스템에서 데이터 전송방법.
- 제7항에 있어서,상기 DRX를 제어하기 위한 제어정보 및 시스템정보는,DRX 주기, 활성화 시간(active time) 또는 동작 시간(on duration)과 관련된 정보를 포함하는 특징으로 하는 무선통신시스템에서 데이터 전송방법.
- 무선통신시스템에서 단말이 데이터를 수신하는 방법에 있어서,기지국으로부터 제 1 요소반송파의 DRX 관련 제어정보 및 시스템정보 중 적어도 하나의 정보를 수신하는 단계;상기 수신된 적어도 하나의 정보에 따라 상기 제 1 요소반송파에 대하여 불연속 수신(DRX) 동작을 수행하는 단계;릴레이로부터 상기 제 1 요소반송파와 구별되는, 제 2 요소반송파의 DRX 관련 제어정보 및 시스템정보 중 적어도 하나를 수신하는 단계; 및상기 릴레이로부터 수신된 적어도 하나의 정보에 따라, 상기 제 1 요소반송파에 대하여 불연속 수신(DRX) 동작과 구별되도록 상기 제 2 요소반송파에 대하여 불연속 수신(DRX) 동작을 수행하는 단계를 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 제11항에 있어서,상기 DRX 관련 제어정보 및 시스템정보는,DRX 주기, 활성화 시간(active time) 또는 동작 시간(on duration)과 관련된 정보를 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 제11항에 있어서,상기 단말이, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 1 요소반송파에 대하여 불연속 수신(DRX) 동작과 동일하도록 상기 제 2 요소반송파에 대하여 불연속 수신(DRX) 동작을 수행하는 단계를 더 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 제11항에 있어서,상기 단말이, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 2 요소반송파의 DRX 주기가 상기 제 1 요소반송파의 DRX 주기와 동일하도록 DRX 동작을 수행하거나, 또는 상기 제 2 요소반송파의 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 동작 시간과 동일하도록 DRX 동작을 수행하거나, 또는 상기 제 2 요소반송파의 DRX 주기 및 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 주기 및 DRX 동작 시간과 동일하도록 DRX 동작을 수행하는 단계를 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 제14항에 있어서,상기 단말이, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 2 요소반송파의 DRX 주기가 상기 제 1 요소반송파의 DRX 주기의 배수가 되도록 DRX 동작을 수행하거나, 또는 상기 제 2 요소반송파의 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 동작 시간의 배수가 되도록 DRX 동작을 수행하거나, 또는 상기 제 2 요소반송파의 DRX 주기 및 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 주기 및 DRX 동작 시간의 배수가 되도록 DRX 동작을 수행하는 단계를 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 제15항에 있어서,상기 단말이, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 2 요소반송파의 DRX 주기 및 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 주기 및 DRX 동작 시간과 독립되도록 DRX 동작을 수행하는 단계를 포함함을 특징으로 하는 단말의 데이터 수신방법.
- 기지국으로부터 제 1 요소반송파의 DRX 관련 제어 정보 또는 시스템 정보를 수신하는 단계;상기 기지국으로부터 수신한 정보를 이용하여 제 1 요소반송파에서의 DRX 주기 및 동작 시간을 설정하는 단계;릴레이로부터 상기 제 2 요소반송파의 DRX 관련 제어 정보 또는 시스템 정보를 수신하는 단계;상기 제 1 요소반송파에서의 DRX 주기 및 동작 시간과, 상기 S1430 단계에서 수신한 정보를 이용하여, 제 2 요소반송파에서의 DRX 주기 및 동작 시간을 조절하는 단계; 및상기 제 1 요소반송파와 상기 제 2 요소반송파의 DRX 주기 및 동작 시간의 일치 여부를 판단하여 제 1 요소반송파 및 제 2 요소반송파의 DRX를 제어하는 단계;를 포함하는, 단말의 데이터 수신방법.
- 제17항에 있어서,상기 제 1 요소반송파에서의 DRX 주기 및 동작 시간과 상기 제 2 요소반송파에서의 DRX 주기 및 동작 시간이 일치하는 것을 특징으로 하는, 단말의 데이터 수신방법.
- 제17항에 있어서,상기 제 2 요소반송파의 성능이 상기 제 1 요소반송파보다 열화되거나 상기 제 2 요소반송파를 통해 송수신할 데이터가 존재하는 경우, 상기 제 2 요소반송파의 동작 시간은 상기 제 1 요소반송파의 동작 시간보다 긴 것을 특징으로 하는, 단말의 데이터 수신방법.
- 제17항에 있어서,상기 제 2 요소반송파에서 송수신이 필요한 데이터가 발생하거나 성능이 열화되는 경우, 상기 제 2 요소반송파의 DRX 주기는 상기 제 1 요소반송파의 DRX 주기보다 짧은 것을 특징으로 하는, 단말의 데이터 수신방법.
- 제17항에 있어서,상기 릴레이로부터 수신한 상기 제 2 요소반송파의 DRX 관련 제어정보 또는 시스템정보는 상기 기지국으로부터 수신한 상기 제 1 요소반송파의 DRX 관련 제어정보 또는 시스템정보를 이용하여 상기 릴레이에 의해 생성된 것을 특징으로 하는 단말의 데이터 수신방법.
- 제17항에 있어서,상기 릴레이로부터 수신한 상기 제 2 요소반송파의 DRX 관련 제어정보 또는 시스템정보는 상기 릴레이와 상기 단말의 링크 성능 및 채널 상태 중 적어도 하나를 이용하여 상기 릴레이에 의해 생성된 것을 특징으로 하는 단말의 데이터 수신방법.
- 제 1 요소반송파 및 제 2 요소반송파에 대하여 DRX 모드를 제어하는 사용자 단말에 있어서,기지국으로부터 제 1 요소반송파의 DRX 관련 제어 정보 또는 시스템 정보를 수신하고, 상기 기지국으로부터 수신한 정보를 이용하여 제 1 요소반송파에서의 DRX 주기 및 동작 시간을 설정하며, 릴레이로부터 상기 제 2 요소반송파의 DRX 관련 제어 정보 또는 시스템 정보를 수신하여 상기 제 1 요소반송파에서의 DRX 주기 및 동작 시간과, 상기 수신한 정보를 이용하여, 제 2 요소반송파에서의 DRX 주기 및 동작 시간을 조절하는 DRX 설정부; 및상기 제 1 요소반송파와 상기 제 2 요소반송파의 DRX 주기 및 동작 시간의 일치 여부를 판단하여 제 1 요소반송파 및 제 2 요소반송파의 DRX를 제어하는 DRX 제어부를 포함하는 DRX 모드를 제어하는 사용자 단말.
- 제 23항에 있어서,상기 DRX 설정부는, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 2 요소반송파의 DRX 주기가 상기 제 1 요소반송파의 DRX 주기의 배수가 되도록 조절하거나, 또는 상기 제 2 요소반송파의 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 동작 시간의 배수가 되도록 조절하거나, 또는 상기 제 2 요소반송파의 DRX 주기 및 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 주기 및 DRX 동작 시간의 배수가 되도록 조절함을 특징으로 하는 DRX 모드를 제어하는 사용자 단말.
- 제 23항에 있어서,상기 DRX 설정부는, 상기 릴레이로부터 수신된 적어도 하나의 정보에 따라 상기 제 2 요소반송파의 DRX 주기 및 DRX 동작 시간이 상기 제 1 요소반송파의 DRX 주기 및 DRX 동작 시간과 독립되도록 조절함을 특징으로 하는 DRX 모드를 제어하는 사용자 단말.
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| US13/391,253 US8837340B2 (en) | 2009-08-21 | 2010-08-16 | Method and system for transmitting/receiving data in a wireless communication system |
| EP10810122A EP2469733A2 (en) | 2009-08-21 | 2010-08-16 | Method and system for transmitting/receiving data in a wireless communication system |
| CN2010800460607A CN102577165A (zh) | 2009-08-21 | 2010-08-16 | 用于在无线通信系统中发送/接收数据的方法和系统 |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20120155355A1 (en) | 2012-06-21 |
| EP2469733A2 (en) | 2012-06-27 |
| US8837340B2 (en) | 2014-09-16 |
| WO2011021814A3 (ko) | 2011-06-30 |
| JP2013502802A (ja) | 2013-01-24 |
| CN102577165A (zh) | 2012-07-11 |
| KR20110020005A (ko) | 2011-03-02 |
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