KR20100099036A - Operation method of terminal for multicast broadcast service in multi-carrier communication environment - Google Patents

Abstract

PURPOSE: An operation method of a terminal for a multicast/broadcast service in a multi-carrier frequency operation communications environment for continuously offering E-MBS of a mobile terminal is provided to perform E-MBS transmission/reception in all states of the terminal through multi carrier frequency. CONSTITUTION: If transceiving traffic with a base station(100) does not exist for a predetermined period, an SC-MS(Single Carrier-Mobile Station) changes a current state into a sleep mode. The SC-MS performs carrier switching operation to a dedicated carrier within a listening window in order to receive E-MBS(Multicast and Broadcast Service). In case the SC-MS varies a current state into a sleep mode, the SC-MS considers a carrier switching period.

Description

Operation Method of Terminal for Multicast / Broadcast Service in Multi-Carrier Frequency Operation Communication Environment {OPERATION METHOD OF TERMINAL FOR MULTICAST BROADCAST SERVICE IN MULTI-CARRIER COMMUNICATION ENVIRONMENT}

The present invention relates to a method of operating a terminal for a multicast / broadcast service in a multi-carrier frequency operation communication environment.

The data transmission service in the conventional mobile communication system can be roughly divided into multicast / broadcast service and unicast service.

In the case of a unicast service, each terminal performs a service using different radio resources, and in the case of a multicast / broadcast service, a service that uses the same radio resource for multiple terminals provides higher efficiency of radio resources. You can perform the service. And also wherein the multicast / broadcast service is referred to the case of 3GPP (3 ^rd Generation Partnership Project) for La MBMS (Multimedia Broadcast Multicast Service) and, IEEE 802.16 MBS (Multicast Broadcast Service ). Hereinafter, in the present specification, the multicast / broadcast service (enhanced-MBS, E-MBS) will be referred to collectively.

In general, a terminal in a communication environment between a base station (BS) and a terminal (MS) using a multi-carrier frequency can transmit and receive data traffic with a service base station using a plurality of carrier frequencies. The plurality of carrier frequencies are dedicated to a unicast / mixed carrier capable of a general up / down data service or a multicast / broadcast service (E-MBS) and a multicast / broadcast service capable of only a multicast / broadcast service. It is divided into a carrier frequency (E-MBS dedicated carrier).

The base station may use a mixed carrier frequency in which both a general user data service and a multicast / broadcast service are available among the multiple carrier frequencies available for the multicast / broadcast service.

Alternatively, the base station may use a multicast / broadcast dedicated carrier frequency (E-MBS dedicated carrier) for the multicast / broadcast service. At this time, the multicast / broadcast service dedicated carrier frequency (E-MBS dedicated carrier) may be set to a carrier frequency (partially configured carrier) configured only to enable the downlink operation according to the characteristics of the service.

Therefore, in the multi-carrier frequency operation, the carrier frequency dedicated to the multicaster / broadcast service, which is a partially configured carrier frequency, cannot operate only by the corresponding carrier frequency, but is a carrier frequency for general data service that is a fully configured carrier frequency. Can be used with (unicast / mixed carrier).

For example, in the Long Term Evolution (LTE) system, which is being discussed as the next generation mobile communication system of 3GPP, a multicast / broadcast dedicated carrier frequency providing only a multicast / broadcast service is introduced. Uplink transmissions are impossible or very limited because only multicast / broadcast services are provided over the multicast / broadcast-only carrier frequency. Thus, services requiring uplink transmission, such as routing area update (RAU), are possible through the unicast carrier frequency, which is an existing communication service carrier.

The terminal is divided into a terminal supporting multi-carrier frequency operation and a terminal capable of transmitting and receiving only one carrier frequency.

A terminal supporting multi-carrier frequency operation can process more than one carrier frequency at the same time, thereby enabling multicaster / broadcast service through a carrier frequency dedicated to multicaster / broadcast service.

At the same time, even a terminal capable of transmitting and receiving only one carrier frequency should enable multicast / broadcast service through a carrier frequency dedicated to multicast / broadcast service. That is, a multicast / broadcast service method through a carrier frequency dedicated to multicast / broadcast service of a terminal capable of transmitting and receiving only one carrier frequency is required.

In addition, when a terminal in the multi-carrier operation changes to an idle state, it is necessary to periodically monitor one completely set carrier frequency in order to check a paging message of the base station.

Therefore, the multicaster / broadcast service is in service when the terminal in the multicaster / broadcast service is changed to the idle state through the fully-set general data service dedicated carrier frequency and the multicaster / broadcast dedicated carrier frequency (E-MBS dedicated carrier). There is a problem that cast services may not be possible.

Therefore, there is an urgent need for a method for receiving a multicast / broadcast service according to whether or not the terminal is capable of supporting the operation of multiple carrier frequencies at the same time.

Accordingly, an object of the present invention is to provide a method of operating a terminal for a multicast / broadcast service in a multi-carrier frequency operation communication environment.

In particular, the present invention provides a multi-caster / broadcast service dedicated carrier frequency in which a single frequency terminal capable of transmitting and receiving multiple carrier frequencies at the same time in a communication environment of a terminal and a base station using a multi-carrier frequency for a high data rate. The present invention provides a method for operating a terminal that enables transmission and reception of a multicast / broadcast service.

The present invention also provides a multicast / broadcast service (E-MBS) even when the terminal receiving the multicast / broadcast service (E-MBS) is changed to a dormant state using a carrier frequency dedicated to the multicast / broadcast service. It is to provide a way to make () continuously possible.

In order to solve the above technical problem, a method of receiving a multicast / broadcast service (E-MBS) by a single frequency terminal in a mobile radio access system supporting multi-carrier frequency operation according to an embodiment of the present invention,

Receiving a multicast / broadcast service provided over a carrier frequency dedicated to a multicast / broadcast service partially configured to enable downlink; And periodically converting the partially configured multicast / broadcast service dedicated carrier frequency and a fully configured carrier frequency capable of uplink and downlink to switch the carrier frequency.

The switching of the carrier frequency may include determining a carrier frequency switching period based on a scheduling interval of the multicast / broadcast service in an active mode connected to a base station. In a mobile radio access system supporting multi-carrier frequency operation according to an embodiment of the present invention, a method for receiving a multicast / broadcast service (E-MBS) by a multi-frequency terminal,

Receiving a multicast / broadcast service provided over a carrier frequency dedicated to a multicast / broadcast service partially configured to enable downlink; And determining a parameter related to the sleep mode based on a scheduling interval of the multicast / broadcast service when a state is to be changed to a sleep mode.

The method further includes, after receiving the service, disconnecting the base station and transitioning to the idle state, wherein the paging information is periodically transmitted through the dedicated carrier frequency of the multicast / broadcast service in the idle state. And confirming and receiving.

According to the above-described configuration, a multicast / broadcast service (E-MBS) dedicated multicast / broadcast service (E-MBS) carrier frequency (E-MBS) regardless of the ability of a terminal supporting multi-carrier frequency operation to simultaneously transmit / receive multiple carrier frequencies is used. MBS) Transmit and receive is possible in all states of the terminal (activation, sleep, idle).

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

In the present specification, a terminal (Mobile Station, MS), a terminal (Mobile Terminal, Mobile Terminal, MT), Subscriber Station (SS), Portable Subscriber Station (PSS), User device (User) It may also refer to an Equipment (UE), an Access Terminal (AT), or the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS) is an access point (AP), a radio access station (RAS), a node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Now, a method of operating a terminal for a multicast / broadcast service in a multi-carrier frequency operation communication environment according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Hereinafter, according to an embodiment of the present invention, a terminal 10 supporting multi-carrier frequency operation may be multicast / broadcast through a carrier frequency dedicated to multicast / broadcast service regardless of a transmission / reception capability through a plurality of carrier frequencies at the same time. A description will be given of an operation method in which the service transmission / reception is possible in all states of the terminal 10.

1 is a diagram illustrating a network for providing a multicast / broadcast service according to an embodiment of the present invention.

Referring to FIG. 1, an extended multicast / broadcast service (hereinafter, referred to as “E-MBS”) system according to an exemplary embodiment of the present invention may include a base station (BS) 100 and an upper node. And a terminal (MS) 10 for accessing an upper mobile communication network or an IP (Internet Protocol) network through a radio access network (RAN) 300 and a wireless access network 300.

The terminal 10 supports multi-carrier frequency operation in a multi-carrier frequency operation communication environment.

In addition, the terminal 10 is a single frequency terminal (SC-MS) 11 that is not possible to transmit and receive through a plurality of carrier frequencies at the same time and a multi-frequency terminal (MC-MS) 12 capable of transmitting and receiving through a plurality of carrier frequencies at the same time It includes.

The base station (BS) 100 transmits and receives data traffic between the terminals 10 by using a multi-carrier frequency, and provides the E-MBS accordingly.

The base station 100 divides a plurality of carrier frequencies into a fully configured carrier frequency capable of both up / down transmission and a partially configured carrier frequency supporting only downlink operation according to a configuration method thereof. Operate.

Therefore, the E-MBS dedicated carrier frequency may be set to a carrier frequency partially configured according to a service characteristic. In addition, the E-MBS may be serviced through a fully configured general carrier frequency (fully configured / mixed carrier).

Control information for the E-MBS is transmitted for each carrier frequency for which a service is provided. In addition, the E-MBS is serviced with a period for each service in consideration of power consumption of the terminal 10.

Meanwhile, an E-MBS service reception method through a state (state) of a terminal and an E-MBS dedicated carrier frequency or a general carrier frequency according to various embodiments of the present disclosure will be described.

Since all user traffic including a real-time data service through an internet protocol is serviced through a shared channel, the base station 100 performs scheduling by collecting state information of the terminals 10.

Here, state information of the terminal 10 may be classified as follows.

In a communication environment between the base station 100 and the terminal 10, when the terminal 10 successfully connects to the service base station 100, the state of the terminal 10 is connected to the base station 100. Classified as The connected state of the terminal 10 is an active mode in which data traffic is transmitted and received according to the operations of the terminal 10, a sleep mode, a scanning mode in which a scanning operation is performed, and the like. Can be subdivided into (scanning mode). In addition, the state in which the terminal 10 is disconnected from the base station 100 is classified as an idle state.

First, FIG. 2 is a flowchart illustrating a method in which a single frequency terminal in an active mode according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency.

Referring to FIG. 2, when a single frequency terminal (hereinafter referred to as “SC-MS”) 11 according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency, periodically As a carrier switching operation method is used, and operates according to the state of the SC-MS (11).

The SC-MS 11 is connected to the base station 100 in the active mode of the connected state (active mode) as shown in the embodiment of Figure 1 through the base station 100 and the general carrier frequency (unicast / mixed carrier) Sends and receives data and terminal control signals.

In order to receive the E-MBS provided through the partially configured E-MBS dedicated carrier frequency, the SC-MS 11 performs carrier switching to the E-MBS dedicated carrier frequency.

At this time, the SC-MS 11 and the general data service carrier frequency in consideration of the scheduling interval of the service provided through the E-MBS dedicated carrier frequency received from the base station 100 for a seamless E-MBS The frequency switching period of the carrier frequency for the multicaster / broadcast service is determined.

At this time, the SC-MS 11 may obtain the reception period information of the E-MBS by using a control channel or an E-MBS dedicated carrier frequency through a general carrier frequency connected to the base station 100.

3 is a flowchart illustrating a method in which a single frequency terminal in a sleep mode according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency.

Referring to FIG. 3, the SC-MS 11 according to an embodiment of the present invention may be operated in a sleep mode for reducing power consumption of a terminal in a connected state. Can be.

That is, the SC-MS 11 may change the state to the sleep mode to reduce power consumption of the SC-MS 11 when there is no traffic to the base station 100 for a predetermined period of time. have.

When the state of the SC-MS 11 is in the sleep mode, the entire operation section is alternately given two sections that are separately defined. That is, as in the embodiment of FIG. 3, the sleep window and the listening window are alternately repeated. Here, the listening interval means a period in which the SC-MS 11 checks the indication information on the traffic generation from the base station 100, and the sleep interval operates in a power saving mode. Means.

Accordingly, in order to receive the E-MBS provided through the partially configured E-MBS dedicated carrier frequency, the SC-MS 11 performs the E-MBS dedicated carrier frequency in a general data service carrier frequency (unicast / mixed carrier) within a listening period. Carrier switching is performed.

In addition, the carrier switching period should be considered in determining the parameters of the sleep interval. That is, when the SC-MS 11 intends to change the state to the sleep mode, it is preferable to consider the carrier frequency switching period when determining the sleep mode related parameter.

The parameter may include an initial sleep interval value (initial window), a value required for defining a maximum sleep interval (final sleep window), a sleep interval start point, a listening interval value, and the like.

4 is a flowchart illustrating a method in which a single frequency terminal in an idle state according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency.

Referring to FIG. 4, the SC-MS 11 according to an embodiment of the present invention may enter an idle state in which the connection with the base station 100 is terminated. As shown in the embodiment of FIG. 4, the SC-MS 11 entering this idle state receives paging information through an E-MBS dedicated carrier frequency in order to receive the E-MBS without being connected to the base station 100. To receive it.

Therefore, the SC-MS 11 in the dormant state, which is being serviced through the E-BMS dedicated carrier frequency, may continue to receive the E-MBS along with monitoring for periodic paging information confirmation from the base station 100.

When the SC-MS 11 receives the paging message from the base station 100, the SC-MS 11 performs a system re-entry procedure after switching to a general data carrier frequency.

At this time, when the SC-MS 11 confirms paging through the paging message, the system re-entry is preferably performed after switching to a fully configured carrier frequency to enable both up / down data transmission and reception.

Next, FIG. 5 is a flowchart illustrating a method of receiving an E-MBS through a general carrier frequency by a single frequency terminal in an idle state according to an embodiment of the present invention.

Referring to FIG. 5, the SC-MS 11 according to an embodiment of the present invention can provide an E-BMS service that is being received through an E-MBS dedicated carrier frequency in a previously active state at the base station 100. Specify the fully configured carrier frequency as the carrier frequency to be monitored at idle and switch to the specified carrier frequency.

6 is a flowchart illustrating a method of receiving an E-MBS by a multicarrier frequency terminal in a sleep mode according to an embodiment of the present invention.

Referring to FIG. 6, when a multi-frequency terminal (hereinafter referred to as "MC-MS") 12 receives an E-MBS through an E-MBS dedicated carrier frequency, the terminal according to an embodiment of the present invention. It works in the following way depending on the state of.

When the MC-MS 12 is in an active mode in a connected state with the base station 100, as shown in the embodiment of FIG. 6, the MC-MS 12 transmits and receives an E-MBS dedicated carrier at the same time. Receive E-MBS over frequency.

In addition, when the MC-MS 12 wants to change the state to the sleep mode, the MC-MS 12 sets the sleep mode related parameter to meet the scheduling interval of the E-MBS.

Therefore, when the MC-MS 12 is in the sleep mode while connected to the base station 100, as shown in the embodiment of FIG. 6, the E-MBS cycle is performed to receive the E-MBS service without interruption in the listening period. Sleep interval parameter determination is made.

That is, the E-MBS period (Scheduling interval) should be a multiple of the sleep interval as shown in Equation 1 below.

Scheduling interval = N * sleep cycle

Next, FIG. 7 is a flowchart illustrating a method of receiving an E-MBS through an E-MBS dedicated carrier frequency by a multi-frequency terminal in an idle state according to an embodiment of the present invention.

8 is a flowchart illustrating a method of receiving an E-MBS through a general carrier frequency by a multi-frequency terminal in an idle state according to an embodiment of the present invention.

9 is a flowchart illustrating a method for receiving an E-MBS using a frequency switching scheme by a multi-frequency terminal in an idle state according to an embodiment of the present invention.

Referring to FIG. 7, the MC-MS 12 is dedicated to E-MBS as in the embodiment of FIG. 7 to receive the E-MBS when the connection with the base station 100 is released. Periodic paging information can be checked and received through the carrier frequency.

That is, the MC-MS 12 receives paging information through the E-MBS dedicated carrier frequency from the base station 100 during the E-MBS service reception through the E-MBS dedicated carrier frequency.

Alternatively, as shown in the embodiment of FIG. 8, the MC-MS 12 is a fully configured general carrier frequency capable of providing an E-MBS service that is being received through an E-MBS dedicated carrier frequency in an idle state and in a previously active state. assign the carrier frequency to the carrier frequency to be monitored at idle, and switch to the designated frequency.

Before the state of the MC-MS 12 transitions to the idle state in which the connection with the base station 100 is terminated, the receiving E-MBS may be received through the carrier frequency configured in the uplink / downlink. In addition, the paging information from the base station 100 may be confirmed and received through the changed fully configured carrier frequency.

Alternatively, as shown in the embodiment of FIG. 9, for seamless service reception in a fully configured general carrier frequency (unicast / mixed carrier) monitored for paging, a frequency conversion is performed to an E-MBS dedicated carrier frequency according to a service period. When the state transition to the idle state, the parameter setting is performed.

As such, according to an exemplary embodiment of the present invention, the terminal 10 supporting the multi-carrier frequency operation may use a dedicated carrier frequency for a multicast / broadcast service (E-MBS) regardless of a transmission / reception capability through a plurality of carrier frequencies at the same time. Multicast / broadcast service (E-MBS) transmission and reception through the terminal 10 has the effect that it is possible in all states (activation, sleep, idle).

The embodiments of the present invention are not limited to the above-described apparatuses and / or methods, but may be implemented through a program for realizing functions corresponding to the configuration of the embodiment of the present invention, a recording medium on which the program is recorded And such an embodiment can be easily implemented by those skilled in the art from the description of the embodiments described above.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a diagram illustrating a network configuration for providing an extended multicast / broadcast service according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a method in which a single frequency terminal in an active mode according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency.

3 is a flowchart illustrating a method in which a single frequency terminal in a sleep mode according to an embodiment of the present invention receives an E-MBS through an E-MBS dedicated carrier frequency.

4 is a flowchart illustrating a method of receiving an E-MBS through an E-MBS dedicated carrier frequency by a single frequency terminal in an idle state according to an embodiment of the present invention.

5 is a flowchart illustrating a method in which a single frequency terminal in an idle state receives an E-MBS through a general carrier frequency according to an embodiment of the present invention.

6 is a flowchart illustrating a method for receiving an E-MBS by a multicarrier frequency terminal in a sleep mode according to an embodiment of the present invention.

7 is a flowchart illustrating a method of receiving an E-MBS through an E-MBS dedicated carrier frequency by a multi-frequency terminal in an idle state according to an embodiment of the present invention.

8 is a flowchart illustrating a method of receiving an E-MBS through a common carrier frequency by a multi-frequency terminal device in an idle state according to an embodiment of the present invention.

9 is a flowchart illustrating a method for receiving an E-MBS using a frequency switching scheme by a multi-frequency terminal in an idle state according to an embodiment of the present invention.

Claims (10)

A method for a single frequency terminal to receive a multicast / broadcast service (E-MBS) in a mobile radio access system supporting multi-carrier frequency operation, Receiving a multicast / broadcast service provided over a carrier frequency dedicated to a multicast / broadcast service partially configured to enable downlink; And Switching the carrier frequency by periodically converting the partially configured multicast / broadcast service dedicated carrier frequency and a fully configured carrier frequency capable of uplink and downlink Multicast / broadcast service receiving method comprising a. The method of claim 1, Switching the carrier frequency, In the active mode connected to the base station, the multicast / broadcast service reception method characterized in that the carrier frequency switching period is determined based on the scheduling interval (scheduling interval) of the multicast / broadcast service. The method of claim 1, After the step of switching the carrier frequency, Further comprising changing to sleep mode, The method related to the sleep mode is determined based on a carrier frequency switching period, multicast / broadcast service receiving method. The method of claim 1, After the step of switching the carrier frequency, Monitoring periodic paging information through the carrier frequency dedicated to the multicast / broadcast service when the connection with the base station is terminated; And Confirming and receiving the paging information to perform reentry (reconnection) to the base station; Multicast / broadcast service receiving method further comprising. The method of claim 4, wherein The reentry, And performing the uplink and downlink after switching to a fully configured carrier frequency capable of the uplink and downlink. The method of claim 5, Before transitioning to the dormant state, And modifying the multicast / broadcast service being received to receive the fully configured carrier frequency. And confirming and receiving the paging information through the changed fully configured carrier frequency. A method for receiving a multicast / broadcast service (E-MBS) by a multi-frequency terminal in a mobile radio access system supporting multi-carrier frequency operation, Receiving a multicast / broadcast service provided over a carrier frequency dedicated to a multicast / broadcast service partially configured to enable downlink; And Determining a parameter related to the sleep mode based on a scheduling interval of the multicast / broadcast service when a state is to be changed to a sleep mode; Multicast / broadcast service receiving method comprising a. The method of claim 7, wherein After receiving the service, The method further comprises the step of the connection with the base station is terminated to transition to the idle state, And checking and receiving periodic paging information through the multicast / broadcast service dedicated carrier frequency in the idle state. The method of claim 8, Before transitioning to the dormant state, Changing the reception of the multicast / broadcast service being received at a fully configured carrier frequency capable of uplink and downlink; And Confirming and receiving the paging information via the modified fully configured carrier frequency Multicast / broadcast service receiving method comprising a. The method of claim 7, wherein After receiving the service, The method further comprises the step of the connection with the base station is terminated to transition to the idle state, A method for receiving a multicast / broadcast service, characterized by periodically switching between a completely configured carrier frequency for checking paging information and a carrier frequency dedicated to a multicast / broadcast service.

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