KR101430465B1 - Method for transmitting/receiving paging message and data in wireless communication system - Google Patents

Abstract

A method of transmitting and receiving a paging message and a method of transmitting and receiving data in a wireless communication system are disclosed. In the method of transmitting a paging message according to an embodiment of the present invention, when a paging opportunity time of a terminal is set every paging channel of a downlink paging channel and a paging message is transmitted using a plurality of paging frames at the paging opportunity time, And adding call control information including the call indicator to the call frame. According to an embodiment of the present invention, by transmitting a paging message through a plurality of frames, it is possible to improve the service quality by preventing the paging message from being delayed to the terminal, It is unnecessary to know the mutual relationship between the frames, so that the complexity of the structure is not increased. In addition to the paging message, when applied to data transmission for other purposes, data transmission efficiency of unicast, broadcast and multicast can be improved.

Call opportunity time, call TTI, call indicator, call frame

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a paging message transmitting / receiving method and a data transmitting / receiving method in a wireless communication system,

The present invention relates to a method of transmitting and receiving data in a wireless communication system that provides wireless communication, and more particularly, to a method of transmitting and receiving information of one or more data transmission units in a base station and a terminal.

FIG. 1 illustrates a network structure of an evolved universal mobile telecommunications system (E-UMTS), which is a conventional mobile communication system.

The E-UMTS system evolved from the existing UMTS system and is currently undergoing basic standardization work in 3GPP. The E-UMTS system may be referred to as an LTE (Long Term Evolution) system.

The E-UMTS network can be roughly divided into Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and Core Network (CN). The E-UTRAN is composed of User Equipment (UE) and Base Station (eNode B), and an Access Gateway (AG) located at the end of the network and connected to the external network. The AG may be divided into a portion that handles user traffic processing and a portion that handles control traffic. At this time, a new interface between the AG for processing new user traffic and the AG for processing control traffic may be used to communicate with each other. One eNode B may have more than one cell. An interface for transmitting user traffic or control traffic may be used between eNode Bs. The CN may be configured as a node for user registration of the AG and other UEs. An interface for distinguishing between E-UTRAN and CN may be used.

The layers of the radio interface protocol of the UE and the network are classified into L1 (first layer), L2 (first layer), and L2 (third layer) based on the lower three layers of the Open System Interconnection (Second layer), and L3 (third layer). In the first layer, the physical layer provides an information transfer service using a physical channel, and the third layer A Radio Resource Control (RRC) layer located in a layer controls radio resources between the UE and the MN. To this end, the RRC layer exchanges RRC messages between the UE and the MN. The RRC layer may be distributed to network nodes such as eNode B and AG, or may be located only in eNode B or AG.

2 illustrates a structure of a radio interface protocol between a terminal based on the 3GPP radio access network standard and a UMTS Terrestrial Radio Access Network (UTRAN).

The wireless interface protocol of FIG. 2 horizontally consists of a physical layer, a data link layer, and a network layer, and vertically includes a user plane for transmitting data information, And a control plane for transmitting control signals (Signaling). The protocol layers of FIG. 2 are divided into three layers: L1 (first layer), L2 (second layer), L3 (second layer), and L3 (second layer) based on the lower three layers of an Open System Interconnection 3 layers).

The physical layer as the first layer provides an information transfer service to an upper layer using a physical channel. The physical layer is connected to a medium access control layer (upper layer) through a transport channel, and data between the medium access control layer and the physical layer moves through the transport channel. Data is transferred between the different physical layers, that is, between the transmitting side and the receiving side physical layer through the physical channel.

The Medium Access Control (MAC) layer of the second layer provides a service to a radio link control layer that is an upper layer through a logical channel. The second layer of Radio Link Control (RLC) layer supports the transmission of reliable data. The function of the RLC layer may be implemented as a function block inside the MAC. In this case, the RLC layer may not exist separately. The PDCP layer of the second layer is a header compression that reduces the IP packet header size, which is relatively large and contains unnecessary control information, in order to efficiently transmit the IP packet, such as IPv4 or IPv6, Compression function.

A radio resource control (RRC) layer located at the uppermost layer of the third layer is defined only on the control plane, and is configured to perform a configuration, a re- configuration, and release of a logical channel, a transport channel, and a physical channel. At this time, the RB means a service provided by the second layer for data transmission between the UE and the UTRAN. If there is an RRC connection between the RRC of the UE and the RRC layer of the wireless network, the UE is in the RRC Connected Mode, and if not, the UE is in the RRC Idle Mode.

The non-access stratum (NAS) layer located at the top of the RRC layer performs functions such as session management and mobility management.

The eNB manages radio resources of one or more cells, and one cell is set to one of bandwidths of 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz, 20 MHz, and the like to provide downlink or uplink transmission services to a plurality of terminals. At this time, different cells may be set to provide different bandwidths.

The downlink transmission channel for transmitting data from the network to the terminal includes a broadcast channel (BCH) for transmitting system information, a paging channel (PCH) for transmitting a paging message, and a downlink SCH ). In case of a traffic or control message of a downlink multicast or broadcast service, it may be transmitted through a downlink SCH, or may be transmitted via a separate downlink multicast channel (MCH). On the other hand, the uplink transmission channel for transmitting data from the UE to the network includes RACH (Random Access Channel) for transmitting an initial control message and an uplink SCH (Shared Channel) for transmitting user traffic or control messages.

A logical channel mapped to a transport channel is a broadcast channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), a multicast traffic channel ), A DCCH (Dedicated Control Channel), and the like.

The physical channel is composed of several subframes on the time axis and several subcarriers on the frequency axis. Here, one sub-frame is composed of a plurality of symbols and a plurality of sub-carriers on the time axis. One subframe is composed of a plurality of resource blocks, and one resource block is composed of a plurality of symbols and a plurality of subcarriers.

3 shows a conventional control channel transmission in terms of a time axis and a frequency axis.

Each subframe is composed of a physical downlink control channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH), a downlink SCH, and a PCH. (E. G., The first symbol). ≪ / RTI > One resource block is called a slot. For example, the slot has a length of 0.5 ms. A transmission time interval (TTI), which is a unit time at which data is transmitted, is a time corresponding to one subframe. For example, the time corresponding to one subframe is 1 ms.

4 shows a configuration on the time axis of a call channel transmission according to the prior art.

Upon receiving the paging message, the UE may perform Discontinuous Reception (DRX) for the purpose of reducing power consumption. To this end, the network constructs a plurality of paging occasions for each time period called a paging DRX cycle, and a specific terminal can receive a paging message only at a specific paging opportunity time. The UE does not receive the paging channel at a time other than the specific paging opportunity time. One call opportunity time corresponds to one TTI. The BS and the UE indicate whether a paging message is to be generated by using a paging indicator (PI) as a specific value for notifying the transmission of a paging message, and a specific identifier (for example, Paging Indicator- (RNTI), and the base station can inform the UE of the paging information transmission. For example, the UE wakes up every DRX cycle and receives one subframe to know whether paging occurs. If the UE has a PI-RNTI in the L1 / L2 control channel (PDCCH) of the received subframe, it can know that it contains a paging message in the PDSCH of the corresponding subframe. For example, IMSI), the terminal responds to the base station (for example, RRC connection) to receive the service.

In general, a paging message for calling a terminal includes information such as a paging cause and a UE identity, and has a size of about 40 to 50 bits. If a call message is transmitted in a cell providing a narrow bandwidth such as 1.25Mhz and two or more UEs are called in a call message, it is impossible to transmit a call message through one call opportunity time, i.e., one TTI. Therefore, one of the terminals is called after one DRX cycle.

Therefore, the conventional paging message transmission method and the data transmission method of this type can delay the call delivery in the service to be provided to the user, cause delay in the service of the terminal, . Accordingly, when data is transmitted from a base station to a specific terminal or a specific group of terminals, a message to be transmitted is larger than a size that can be transmitted in one subframe, There is a need for a method for effectively transmitting and receiving a plurality of subframes. In addition, an efficient transmission / reception method is also required when data is transmitted from a terminal to a base station using a plurality of subframes.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a paging message transmission method and a paging message transmission method, .

According to another aspect of the present invention, there is provided a mobile communication system including a base station, a base station, a base station, a base station, a base station, and a base station, And a method of receiving a paging message for confirming a message and responding to the base station.

A third object of the present invention is to provide a data transmission method for preventing data transmission of a base station from being delayed when data is transmitted in a unicast, broadcast or multicast manner to a specific terminal or a plurality of terminals .

A fourth object of the present invention is to provide a data transmission method and a data transmission method in which when a base station transmits data for a specific terminal or a plurality of terminals in one transmission opportunity time or at a specific time, Receiving method according to the present invention.

A fifth technical object of the present invention is to provide a method for transmitting data in one or more transmission units (for example, one or more subframes) in order to transmit data for a base station in a mobile station without delay, And to receive data transmitted in a transmission unit.

According to an aspect of the present invention, there is provided a method for transmitting a paging message, the method comprising: setting a paging opportunity time of the terminal at each paging cycle of a downlink channel; And adding call control information including the multiple call indicator to the call frame when transmitting the call message using the call control information.

Preferably, if multiple call indicators of call control information of a specific call frame indicate transmission of a specific number of call frames either serially or at specific intervals, call control information of the call frame after a particular call frame may include multiple call indicators The addition process may be omitted.

Advantageously, the method further comprises adding call control information including a single call indicator to a last call frame of the plurality of call frames.

Advantageously, said plurality of paging frames are transmitted in successive TTIs or may be transmitted in TTIs spaced apart from each other by a predetermined time interval.

Advantageously, a first paging frame to which the call control information is added may be transmitted in a TTI having a predetermined paging frame offset from the beginning of the paging opportunity time.

Advantageously, the call control information may include at least one of a transmission format, a subcarrier and a symbol information, an AMC information, and a HARQ information of a resource block in which the paging message is transmitted.

Advantageously, the paging message can be transmitted to the terminal via either a physical downlink shared channel (PDSCH), a paging channel (PCH), or a downlink shared channel (DL-SCH).

According to another aspect of the present invention, there is provided a method for receiving a paging message, the method comprising: setting a paging opportunity time for each downlink channel paging cycle; And if the call indicator exists, receiving a paging message of the current paging frame and receiving a paging frame transmitted in the next TTI.

Preferably, in the process of receiving the paging frame transmitted in the next TTI, a process of receiving the paging message of the current paging frame and the paging control information transmitted in the next TTI until a single paging indicator exists in the paging control information If there is a single call indicator in the call control information, the terminal can be switched to the sleep state after receiving the paging message of the current paging frame.

Preferably, if the multiple call indicator of the call control information of a specific call frame indicates the transmission of a specific number of call frames continuously or at a specific interval, the terminal transmits the call indicator of the call control information of the call frame after the specific call frame It is possible to receive a specific number of paging frames regardless of the number of paging frames. The paging message receiving method may further include the step of responding to the base station if the terminal identifier of the terminal exists in either the paging indicator or the received paging message.

Preferably, the call control information, the paging message, information on whether or not to support a plurality of paging frames, information for receiving the multiple paging indicator, and the paging frame may include an RRC signal, a PDCP layer PDU, Or a PDU of the MAC layer.

According to another aspect of the present invention, there is provided a data transmission method including: setting a transmission opportunity time of a mobile station for each downlink channel transmission period; And adding transmission control information including the multiplex transmission indicator to the subframe when the data is transmitted or when data is transmitted at a specific time point or an event occurrence time point implicitly or explicitly determined with the terminal.

According to another aspect of the present invention, there is provided a data reception method for allocating transmission opportunity time for each downlink channel transmission period in a mobile station, If a transmission indicator exists or there is a multiplexing indicator in the transmission control information received at a specific point in time that is implicitly or explicitly determined at a specific point in time or at an event occurrence time point with the base station, And receiving the data.

In order to achieve the fifth technical object, a data transmission method in a mobile station and a data reception method in a base station according to an embodiment of the present invention each follow the transmission method of the base station and the reception method of the mobile station, A physical uplink control channel (PUCCH) may be used as a transmission channel for transmission control information in place of the PDCCH. At this time, a physical uplink shared channel (PUSCH) or an uplink shared channel (UL-SCH) may be used as a channel through which data is transmitted. Preferably, the transmission control information can be transmitted through a channel through which data is transmitted. In addition, the UE can be allocated resource allocation information such as a transmission time point at which data can be transmitted from the Node B to the Node B and an amount of resources (for example, the number of subframes), in an explicit or implicit manner.

The first to fifth data transmission and reception methods described above can be used in combination with each other as a method of a method without being bound to any one method.

According to an embodiment of the present invention, by transmitting a paging message through a plurality of frames, it is possible to improve the service quality by preventing the paging message from being delayed to the terminal, It is not necessary to know the mutual relationship between frames, thereby increasing the complexity of the structure. In addition to the paging message, when the present invention is applied to data transmission for other uses, the effect of improving the data transmission efficiency of unicast, broadcast and multicast is improved have.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the following embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below.

In one embodiment of the present invention, one or more information units, e.g., one or more subframes, can be transmitted and received between the base station and the terminal. Herein, one information unit refers to a unit explicitly or implicitly determined for a base station and a terminal, such as one subframe transmitted during one TTI.

In one embodiment of the present invention, the base station sets a specific call opportunity time per paging cycle, and when a plurality of paging frames are transmitted, the paging control information of the paging frame is used for indicating the appearance of paging frames for the next unit time Use special values or identifiers.

The base station sets a specific call opportunity time for each call interval of a downlink channel for a specific terminal, and the call opportunity time is composed of a plurality of call frames. When transmitting a paging message to a terminal, the base station uses one or more paging frames to configure the paging control message and the paging message per paging frame. One call control information has an indicator (for example, PI-RNTI) indicating indication information of the presence or absence of a paging message. In addition, the call control information may have an RNTI different from the PI-RNTI indicating whether a paging message transmitted in a plurality of paging frames should appear.

That is, when transmitting a paging message in a plurality of paging frames, the base station uses an MPI-RNTI (Multiple Paging Indicator-Radio Network Temporary Identity) indicating that the paging message is transmitted in a plurality of paging frames instead of the PI-RNTI. Hereinafter, the MPI-RNTI will be referred to as a multiple call indicator and the PI-RNTI will be referred to as a single call indicator to distinguish it from the multiple call indicator. The multiple call indicator may be set implicitly between the terminal and the base station, or may be explicitly set at one of the terminals or the base station and informed to the other.

5 is a flowchart illustrating a method of transmitting a paging message according to an exemplary embodiment of the present invention.

In step S510, the base station sets a paging opportunity time of the terminal every paging channel of the downlink channel.

Next, when the base station transmits a paging message using a plurality of paging frames at the paging opportunity time (S520), the multiple paging indicator is added to the paging control information (S525). At this time, the call control information including the multiple call indicator is added to the call frame. At this time, the call control information may include other information than instruction information (e.g., a single call indicator or multiple call indicator) for the call message. That is, the call control information may include a format of a resource block to which a paging message is transmitted, subcarrier and symbol information, Adaptive Modulation and Coding (AMC) information, HARQ information, and the like. Also, the call control information may be transmitted in the form of a control message together with the information such as the reason for the call and the terminal identifier through the paging message.

Here, the channel to which the call control information is transmitted is an L1 / L2 control channel including a physical downlink control channel (PDCCH). The call control information may be transmitted via, for example, a physical downlink shared channel (PDSCH), a paging channel (PCH), a downlink shared channel (DL-SCH)

In addition, the base station may notify the terminals of the data transmission support information using a plurality of paging frames through a specific value (for example, using one or more bits).

On the other hand, if the multiple call indicator of the call control information of a specific call frame indicates that a certain number of call frames should be transmitted continuously or at specific intervals, a multiple call indicator is added to the call control information of the call frame after the specific call frame The process (S525) may be omitted.

When the configuration of the current paging frame is completed, the base station determines whether the paging frame to be transmitted next is the last paging frame (S530). At this time, if it is not the last call frame, the multiple call indicator is added to the call control information of the next call frame (S525). If the next call frame to be transmitted at the base station is the last call frame, a single call indicator is added to the call control information of the last call frame (S535), and the procedure is terminated.

When a base station uses a multiple call indicator to transmit a plurality of paging messages to a terminal, the base station and the terminal transmit and receive a paging frame through successive subframes, for example, a first TTI, a second TTI, and a third TTI . Alternatively, the base station and the terminal can transmit and receive a paging frame through a subframe at a specific interval, for example, a first TTI, a third TTI, and a fifth TTI. If a multiple call indicator or a multiplex transmission indicator of a specific subframe indicates that a certain number of subframes should be transmitted continuously or at a specific interval, the presence or absence of a call indicator or a multiplex transmission indicator of the call control information of a subframe after a specific subframe The mobile station can receive as many paging frames or data as the number of the mobile stations. In addition, a plurality of multiple call indicators having a specific time interval may be defined and used. In addition, different multi-call indicators may be used depending on services such as MBMS service, broadcast service, FTP transmission, or transmission characteristics such as unicast, broadcast, A transport transmission indicator or multiple call indicators may be used.

Meanwhile, when the base station transmits a paging message using a single paging frame at the paging opportunity time (S520), the single paging indicator is added to the paging control information (S529), and the procedure is terminated.

In one embodiment of the present invention, the terminal receives a specific call frame constituting the call opportunity time every paging cycle to obtain call control information. If there is a value or an identifier indicating the transmission of a continuous paging message in the paging control information, the terminal receives the paging message of the current paging frame and receives an additional paging frame appearing after the time of receiving the paging frame .

6 is a flowchart of a paging message receiving method according to an embodiment of the present invention.

First, the terminal sets a call opportunity time at each call interval of the downlink channel (S540).

Next, it is determined whether there are multiple call indicators in the call control information received at the call opportunity time set in the terminal (S550). At this time, if there are multiple call indicators in the call control information, the call message of the current call frame is received (S555), and the call frame transmitted in the next TTI is received (S557). At this time, the terminal receiving the multiple call indicator of the call control information may receive only the call control information of the paging frame transmitted in the next TTI. Information on whether to receive only the call control information or to receive the paging frame may be implicitly determined between the base station and the terminal, or may be explicitly set by the terminal or the base station to inform the other. In addition, the paging message and the call control information may be transmitted through a physical downlink shared channel, a paging channel, a downlink shared channel, or the like.

According to the above steps (S550-S557), the terminal can receive the paging message for a plurality of TTIs in one discontinuous cycle. Meanwhile, information on whether or not there is an additional call frame or information on whether or not there is additional call control information is implicitly determined between the base station and the terminal, information explicitly set by either the terminal or the base station, Lt; / RTI >

 The terminal receives a specific paging frame constituting the paging opportunity time every paging period to obtain paging control information. Preferably, the terminal may be in a sleeping state to reduce power consumption at a time other than a specific time when the paging frame is received. At this time, the UE wakes up in a paging cycle for receiving a paging frame, and can receive a paging frame, which is a subframe corresponding to one TTI. That is, if there is a single call indicator in the call control information of the paging frame, the terminal receives the paging message in the corresponding paging frame and then switches to the sleep state if it can not find its terminal identifier in the single paging indicator or in the paging message can do. In addition, when there are multiple call indicators in the call control information of the call frame, the terminal can continuously receive call frames transmitted during the next TTI without switching to the sleep state after receiving the call message of the corresponding call frame have.

At this time, if there is a single call indicator in the call control information of the paging frame received in the next TTI (S560), the call message of the current paging frame, i.e., the last paging frame is received (S570) and the procedure is terminated.

On the other hand, if there is a single call indicator in the call control information of the first paging frame received at the paging opportunity time, the terminal receives the paging message of the current paging frame (S570) and ends the procedure.

(For example, a specific interval between subframes, the number of consecutive subframes, or the number of consecutive subframes) necessary for receiving the call control information, the paging message, Discrimination information on whether to receive only the control information or whether to receive the paging frame, etc.) may be transmitted to the terminal via the RRC signal.

The RRC signal includes system information, radio bearer setup, radio bearer reconfiguration, RRC connection request / connection setup / connection release, RRC connection reconfiguration, RRC connection re-establishment, and the like.

In addition, the information for receiving the call control information, the paging message, the information about whether or not a plurality of subframes are supported in the network, the multiple paging indicator, and the information required for receiving consecutive paging frames (for example, Or the identification information on whether to receive only the call control information or the call frame, etc.) can be transmitted using the PDCP layer PDU, the RLC layer PDU, and the MAC layer PDU.

FIG. 7 is a detailed flowchart of the call message receiving process (S555, S570) of FIG.

First, the terminal receives a paging message included in a paging frame (S751).

Next, in step S752, it is determined whether the terminal identifier of the terminal itself or the terminal group identifier of the terminal to which the terminal belongs exists in the call indicator or the received paging message.

If the terminal identifier of the terminal itself or the terminal group identifier of the group to which the terminal belongs exists in the call indicator or the paging message, the terminal receives the service provided by the base station in response to the base station (S753).

If the terminal identifier of the terminal itself or the terminal group identifier of the terminal to which the terminal belongs does not exist in the call indicator or the paging message, the terminal switches to the sleep state (S754).

FIG. 8A shows an example of the call frame arrangement and configuration of FIG. 5 when only a single call indicator (PI-RNTI) is added to the call control information.

The wireless network constitutes a paging period which is a period for transmitting a paging message. At this time, one paging cycle may be displayed more than once in one discontinuous reception cycle (DRX cycle). Or may have one or more discontinuous reception periods within one calling period. One paging cycle consists of one or more paging occasions. Then, one call opportunity time is again composed of one or more subframes, and each subframe has a constant TTI length (for example, 1 ms).

As shown in FIG. 8A, a TTI to which a paging message can be transmitted for one call opportunity time within a DRX cycle is designated for each UE or a group to which a plurality of UEs belong, and a TTI to which a paging message can be transmitted is called a calling TTI . The base station knows a specific UE ID or a group identifier to which a specific UE belongs, and associates the identifiers with a specific calling TTI of a specific call opportunity time. In FIG. 8A, the time difference between the beginning of the paging occasion time and the beginning of the first paging TTI is a paging frame offset and abbreviated as PFO.

If the base station does not need to send a paging message in a discontinuous reception period, it does not specify a single call indicator and multiple call indicators. In the call control information, if the PI information does not include the terminal identifier of the terminal or the identifier of the terminal group to which the terminal belongs, or if the PI information does not indicate the call message, the terminal switches to the sleep state. For example, when there is no single call indicator or multiple call indicator in the call control information, the terminal determines that there is no call message and returns to the sleep state again.

When the base station transmits the paging message through the paging frame, whether or not the paging message is transmitted includes a paging message transmission channel (for example, PDSCH, DL-SCH, PCH, etc.) temporally mapped with the channel transmitting the paging control, Lt; / RTI > Here, the paging message is a paging message of a specific terminal or a paging message for a paging group to which a specific terminal belongs. If the base station can transmit a paging message using only one paging frame, a single paging indicator is specified as the PI information of the paging control information.

The base station transmits call information including the single call indicator to the UEs using the system information or the RRC connection. Alternatively, call information including the call indicator may be implicitly defined between the terminal and the base station. Through the paging information, the terminal determines the paging opportunity time corresponding to the identifier of the terminal itself in the paging cycle and grasps the location of the first paging TTI set in the paging opportunity time.

The terminal wakes up from the sleep state to receive the call control information of the paging frame transmitted in the first paging TTI. If there is a single call indicator in the call control information of the call frame, the terminal receives the call message of the received call control frame.

In the call control information, if the PI information includes the terminal identifier of the terminal or the identifier of the terminal group to which the terminal belongs, or if the PI information indicates an instruction for the paging message, the terminal receives the paging message. For example, if there is a single call indicator in the call control information, the terminal receives the paging message of the paging frame transmitted during one TTI. If the terminal finds the terminal identifier of the terminal in the PI information or the paging message, the terminal responds to the base station. If the terminal does not find the terminal identifier of the terminal itself, the terminal returns to the sleep state again. 8A shows that a call frame is not transmitted in an additional TTI because a single call indicator is used.

FIG. 8B shows an example of the call frame arrangement and configuration of FIG. 5 when multiple call indicator (MPI-RNTI) is added to call control information.

In order to transmit a paging message to a specific terminal or a group to which the specific terminal belongs, the base station determines the paging opportunity time, the call control information, and the first call TTI to which the paging message is to be transmitted according to the identifier of the group to which the terminal or the terminal belongs.

As shown in FIG. 8B, when a paging message is transmitted using a plurality of paging frames, the PI information of the corresponding paging frame of successive paging TTIs from the first paging TTI is designated as a multiple calling indicator, The PI information of the call control information is designated as a single call indicator and the call message is transmitted to a plurality of call frames. That is, when transmitting a paging message through a plurality of TTIs, the base station informs the mobile station whether a paging message is transmitted and a paging message is transmitted to a plurality of subframes by using a multiple paging indicator in place of the single paging indicator in the paging control information. At this time, the base station transmits paging information including the single call indicator and the multiple call indicator to the UEs using the system information or the RRC connection. Alternatively, call information including the call indicator may be implicitly defined between the terminal and the base station.

A call indicator such as a single call indicator or a multiple call indicator may include a terminal group identifier or the terminal identifier to which the terminal belongs. In one embodiment of the present invention, the call indicator may indicate the presence or absence of a paging message without the terminal identifier information, and the paging message may include the terminal identifier or the terminal group identifier.

The terminal determines the paging opportunity time corresponding to the identifier of the terminal itself in the paging cycle through the paging information of the base station and grasps the location of the first paging TTI set in the paging opportunity time.

The UE awakes from the sleep state and receives the call control information at a time after the PFO according to its own terminal identifier or the group identifier to which the terminal belongs, that is, the first call TTI time at which the paging frame is transmitted within the paging period.

After receiving the call control information, the terminal determines whether or not there is a paging frame transmitted through the multiple call indicator. If there are multiple call indicators in the call control information of the paging frame, the terminal receives a paging frame that is transmitted in an additional paging TTI after the received paging frame.

More specifically, in FIG. 8B, the terminal performs the following operations. If the PI information includes the terminal identifier of the terminal or the group identifier to which the terminal belongs, or if the PI has an instruction for the call message, that is, if the call control information includes a single call indicator and a multiple call indicator, And receives a paging message during the TTI.

Since the multiple call indicator in the call control information belonging to the first and second call TTIs indicates the transmission of an additional call frame, the terminal does not switch to the sleep state, but receives the call message of the further transmitted call frame .

Since the call control information of the last call frame, i.e., the call control information belonging to the third call TTI, has a single call indicator, the terminal acquires the call message of the last call frame. The terminal responds to the base station or returns to the sleep state depending on whether the terminal itself has found the terminal identifier. Indicates that the call frame is not transmitted in an additional TTI because a single call indicator is used in the last call frame, i.e., the third call frame.

A method of transmitting and receiving a plurality of subframes transmitted during a plurality of TTIs using a specific value (e.g., a multiple call indicator) indicating whether a subframe is consecutive between the base station and the terminal is not limited to transmission and reception of a paging message , And can be applied to other data transmission / reception.

For example, when a base station transmits system information to a particular terminal or to a specific group of terminals or to all terminals of a cell, the terminal may transmit one or more data or messages in succession or using a plurality of subframes, , A multiplex transmission indicator), it is possible to transmit and receive information transmitted in a plurality of subframes.

Hereinafter, the transmission control information corresponds to the above described call control information, the single transmission indicator corresponds to a single call indicator, and the multiple transmission indicator corresponds to a multiple call indicator. Further, the transmission period corresponds to the above-described call period, and the transmission opportunity time corresponds to the above-described call opportunity time. That is, the terminal only receives data transmitted by the base station at a specific transmission opportunity time.

Hereinafter, the base station transmits data for use other than the paging message to the mobile station.

9 is a flowchart of a data transmission method according to an embodiment of the present invention.

First, the base station sets a transmission opportunity time of the terminal for each downlink channel transmission period (S910). Or a specific event such as a specific time point implicitly or explicitly determined with respect to the terminal or data to be sent to the terminal occurs. Next, when a transmission message is transmitted using a plurality of subframes at a transmission opportunity time at the base station, or at a specific time point generated by a specific time or a specific event determined implicitly or explicitly with the terminal (S920), the multiplex transmission indicator is transmitted And adds it to the control information (S925). At this time, the transmission control information including the multiplex transmission indicator is added to the subframe.

When the configuration of the current subframe is completed, the base station determines whether the next subframe to be transmitted is the last subframe (S930). If it is not the last sub-frame, the multiplexing indicator is added to the transmission control information of the next sub-frame (S925). Or a multiple transmission indicator is defined to indicate that a certain number of subframes are transmitted continuously or at specific intervals, and if such a definition has been agreed with the terminal, the call control information of the subframes after a particular subframe includes a multiple call indicator The addition process may be omitted. If the next subframe in the base station is the last subframe, a single transmission indicator is added to the transmission control information of the last subframe (S935), and the procedure is terminated.

On the other hand, if the base station transmits a transmission message using a single subframe in the transmission opportunity time (S920), the single transmission indicator is added to the transmission control information (S929), and the procedure is terminated.

10 is a flowchart of a data receiving method according to an embodiment of the present invention.

In step S940, the UE sets a transmission opportunity time for each downlink channel transmission period or determines a data reception time known from the base station.

Next, in step S950, it is determined whether a multiplex transmission indicator exists in the transmission control information received in the transmission opportunity time set in the terminal. At this time, if there is a multiplex transmission indicator in the transmission control information, data of the current subframe is received (S955), and a subframe transmitted in the next TTI or a TTI after the defined interval is received (S957).

At this time, if the multiplex transmission indicator is defined to indicate that a certain number of subframes are transmitted continuously or at a specific interval, and if such a definition is agreed with the base station, Frame.

According to the above processes (S950-S957), the terminal can receive data for a plurality of TTIs in one discontinuous cycle.

At this time, if there is a single transmission indicator in the transmission control information of the subframe received in the next TTI (S960), the data of the current subframe, i.e., the last subframe is received (S970) and the procedure is terminated.

On the other hand, if there is a single transmission receiver in the transmission control information of the first subframe received at the transmission opportunity time, the terminal receives the data of the current subframe (S970) and terminates the procedure.

9 and 10 can also be applied to a method of transmitting data in the uplink.

That is, the UE can be allocated resource information (for example, the transmission time and the number of subframes) explicitly or implicitly from the base station, sets a time to transmit data to the base station based on the allocated resource information , And if the terminal transmits data using a plurality of subframes at a set time, transmission control information including a multiplex transmission indicator may be added to at least one subframe.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that such modifications are within the technical scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

The present invention relates to a method of transmitting and receiving information of one or more data transmission units at a base station and a terminal, and can be applied to a data transmission / reception algorithm of a wireless communication system for providing wireless communication, a related protocol, a related apparatus such as a base station and a terminal.

1 illustrates a network structure of an E-UMTS which is a conventional mobile communication system.

2 illustrates a structure of a wireless interface protocol between a terminal based on the 3GPP RAN specification and a UTRAN.

3 shows a conventional control channel transmission in terms of a time axis and a frequency axis.

4 shows a configuration on the time axis of a call channel transmission according to the prior art.

5 is a flowchart illustrating a method of transmitting a paging message according to an exemplary embodiment of the present invention.

6 is a flowchart of a paging message receiving method according to an embodiment of the present invention.

7 is a detailed flowchart of the call message receiving process of FIG.

Figs. 8A and 8B show an example of the call frame arrangement and configuration in Fig. 5. Fig.

9 is a flowchart of a data transmission method according to an embodiment of the present invention.

10 is a flowchart of a data receiving method according to an embodiment of the present invention.

Claims (21)

delete delete delete delete delete A method for a terminal to receive a paging message in a wireless communication system, Setting a call opportunity time to receive a paging message at each paging cycle; And If there is a multiple call indicator indicating transmission using a plurality of paging frames in the paging control information received at the paging opportunity time, a call frame of the current paging frame is received and a paging frame transmitted in the next TTI (Transmission Time interval) Comprising: Receiving a paging message of a current paging frame when a single paging indicator indicating transmission using a last paging frame among a plurality of paging frames exists in the paging control information received at the paging opportunity time, If there is no single call indicator and multiple call indicator in the call control information, the terminal is in an idle mode, How to receive a paging message. delete The method according to claim 6, Wherein the plurality of call frames comprise: Characterized in that the message is transmitted in a continuous TTI. The method according to claim 6, Wherein the plurality of call frames comprise: Are transmitted in a TTI spaced apart from each other by a predetermined time interval. The method according to claim 6, The first call frame to which the call control information is added, Wherein the TTI is transmitted in a TTI having a predetermined paging frame offset from the beginning of the paging opportunity time. The method according to claim 6, The call control information includes: Wherein the paging message includes at least one of a transmission format of a resource block to which the paging message is transmitted, subcarrier and symbol information, Adaptive Modulation and Coding (AMC) information, and Hybrid Automatic Retransmit request (HARQ) Way. The method according to claim 6, The call message Characterized in that the message is transmitted to a terminal through one of a physical downlink shared channel (PDSCH), a paging channel (PCH), and a downlink shared channel (DL-SCH). The method according to claim 6, The multiple call indicator Wherein a predetermined number of paging frames are transmitted between the subscriber station and the base station. The method according to claim 6, Wherein the call control information further comprises a terminal identifier, Wherein the terminal is in an idle mode when the terminal identifier does not indicate the terminal. How to receive a paging message. delete delete delete delete delete delete delete

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