KR20130008482A - Terminal of supporting direct communication using infra communication and direct communication method of the same - Google Patents

Terminal of supporting direct communication using infra communication and direct communication method of the same Download PDF

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Publication number
KR20130008482A
KR20130008482A KR1020120075942A KR20120075942A KR20130008482A KR 20130008482 A KR20130008482 A KR 20130008482A KR 1020120075942 A KR1020120075942 A KR 1020120075942A KR 20120075942 A KR20120075942 A KR 20120075942A KR 20130008482 A KR20130008482 A KR 20130008482A
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South Korea
Prior art keywords
terminal
base station
message
direct communication
service
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KR1020120075942A
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Korean (ko)
Inventor
장성철
윤미영
김은경
김성경
김원익
이현
윤철식
임광재
김석기
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한국전자통신연구원
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Priority to US13/547,672 priority Critical patent/US8995319B2/en
Publication of KR20130008482A publication Critical patent/KR20130008482A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

According to an embodiment of the present invention, a method in which a first terminal supports direct communication using infrastructure communication may include establishing at least one direct communication link with at least one second terminal, and establishing at least one traffic connection with a base station. Setting and transmitting data transmitted from the at least one second terminal through the at least one direct communication link to the at least one traffic connection or data transmitted from the base station through the at least one traffic connection. Communicating to the at least one direct communication link.

Description

Terminal and direct communication method supporting direct communication using infrastructure communication {TERMINAL OF SUPPORTING DIRECT COMMUNICATION USING INFRA COMMUNICATION AND DIRECT COMMUNICATION METHOD OF THE SAME}

The present invention relates to a terminal for supporting direct communication using infrastructure communication and a direct communication method thereof.

In an environment in which infrastructure communication between a terminal and a base station is established, a method of performing direct communication between terminals using a specific resource region has been proposed.

Infrastructure communication and direct communication between terminals are performed using independent resources and are separate communication methods.

On the other hand, in order to exchange information with the backbone network or to expand the serviceable area in direct communication between terminals, it is necessary to use infrastructure communication.

The technical problem to be achieved by the present invention is to provide a terminal and a direct communication method for supporting direct communication using infrastructure communication.

According to an embodiment of the present invention, a method in which a first terminal supports direct communication using infrastructure communication may include establishing at least one direct communication link with at least one second terminal, and establishing at least one traffic connection with a base station. Setting and transmitting data transmitted from the at least one second terminal through the at least one direct communication link to the at least one traffic connection or data transmitted from the base station through the at least one traffic connection. Communicating to the at least one direct communication link.

According to another embodiment of the present invention, a method for supporting direct communication using an infrastructure communication by a first terminal includes performing a service setting procedure with a base station to perform direct communication with at least one second terminal. The service setting request message (DSA-REQ) message is transmitted to the base station, and the service setting request message includes identifier information of the first terminal and identifier information of the second terminal. do.

According to another embodiment of the present invention, a method for directly communicating by using an infrastructure communication by a first terminal includes receiving system information including an advertisement period and an advertisement offset from a base station, and adjusting the advertisement period and the advertisement offset. Receiving an advertisement message for establishing a communication service directly from the base station, and if the advertisement message includes an identifier of the first terminal, performing a service setting procedure with the base station.

According to an embodiment of the present invention, at least one of the terminals participating in the direct communication between the terminals may exchange information with the backbone network through the base station. In addition, by using infrastructure communication in direct communication between terminals, a service area in which direct communication is possible can be widened.

1 shows a communication environment according to a first embodiment of the present invention.
2 shows a procedure of establishing a traffic connection by a transmitting terminal according to a first embodiment of the present invention.
3 illustrates a procedure of registering an identifier of a terminal participating in direct communication with a base station according to the first embodiment of the present invention.
4 and 5 illustrate an example of a signaling procedure in which a link establishment function of direct communication and a traffic connection establishment function of infrastructure communication are associated.
6 shows a communication environment according to a second embodiment of the present invention.
7 is a flowchart illustrating a procedure for supporting direct communication between terminals by a base station according to a second embodiment of the present invention.
8 is a flowchart illustrating a procedure of registering information of communication terminals directly with a base station according to the second embodiment of the present invention.
9 and 10 are flowcharts illustrating a service setting procedure according to a second embodiment of the present invention.
11 is a flowchart illustrating a service setting procedure according to a second embodiment of the present invention.
12 illustrates a terminal and a base station that can be applied to an embodiment of the present invention.

DETAILED DESCRIPTION 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. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. 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.

Throughout the specification, a mobile station (MS) is a terminal, a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), an access terminal (access) It may refer to a terminal (AT), a user equipment (UE), or the like, and may include all or some functions of the terminal, MT, SS, PSS, AT, UE, and the like.

In addition, a base station (BS) includes a node B, an evolved node B, an eNodeB, an access point (AP), a radio access station (RAS) a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may include all or some of functions of a Node B, an eNodeB, an AP, a RAS, a BTS, and an MMR-BS.

First, a first embodiment of the present invention will be described. A first embodiment of the present invention relates to a method in which a terminal participating in direct communication between terminals exchanges information with a communication entity located in a backbone network using infrastructure communication.

1 shows a communication environment according to a first embodiment of the present invention.

Referring to FIG. 1, a communication environment according to an embodiment of the present invention includes a base station 100 and at least one terminal 110, 120, 130. Here, the terminals 110, 120, and 130 may perform direct communication between the terminals. In this case, the terminal 110 may be located in an area in which infrastructure communication with the base station is possible, and may perform infrastructure communication with the base station. That is, the terminal 110 may include both an infrastructure communication interface and a direct communication interface. The terminal 110 may independently operate direct communication and infrastructure communication. The terminals 120 and 130 may be located in an area in which infrastructure communication is possible or an area in which infrastructure communication is not possible.

In the present specification, the terminal is located in an area where infrastructure communication is possible, such as the terminal 110, and performs data communication with the base station 100 to exchange data, and performs direct communication with the terminals 120 and 130 to exchange data. May be referred to as a forwarding terminal (MS). The delivery terminal 110 participates in both direct communication and infrastructure communication. In addition, the delivery terminal 110 transfers the two links to each other using an infrastructure communication interface and a direct communication interface. That is, the delivery terminal 110 may transmit data received from the terminals 120 and 130 through direct communication to the base station 100 through infrastructure communication, and transmit data received from the base station 100 through infrastructure communication. It may be delivered to the 120 and 130 through direct communication.

The base station 100 is connected to an upper layer (including a server, etc.) located in the backbone network and may receive data from the upper layer or transmit data to the upper layer. Therefore, even though direct communication between the terminal 110 and the terminals 120 and 130 is operated independently of the backbone network, data may be exchanged with higher layers through the base station 100. To this end, the delivery terminal 110 establishes a traffic connection with the base station, and connects it with a direct communication link with the terminals 120 and 130.

2 shows a procedure of establishing a traffic connection by a transmitting terminal according to a first embodiment of the present invention.

2, it is assumed that the delivery terminal 110 establishes a direct communication link with the terminal 120 and the terminal 130, respectively. At this time, when a plurality of traffic connections (FID k, FID n) is established between the base station 100 and the forwarding terminal 110, the forwarding terminal 110 establishes a direct communication link with the terminal 120, the base station 100 One of the traffic connections (FID k) and the direct communication link with the terminal 130 may be connected to the other (FID n) of the traffic connection with the base station 100.

Procedures for establishing traffic connections (FID k, FID n) may be performed through an exchange procedure of a dynamic service addition request / response / acknowledgement (AAI_DSA_REQ / RSP / ACK) message, respectively.

The procedure for connecting a direct communication link between the transmitting terminal 110 and the terminal 120 or the terminal 130 may include a direct mode link establishment request / response (DM-LEST-REQ / RSP) message. This can be done through an exchange procedure.

On the other hand, the base station 100 needs to know the information of the terminal participating in the direct communication. Therefore, an identifier of a terminal participating in direct communication should be registered in the base station 100.

3 illustrates a procedure of registering an identifier of a terminal participating in direct communication with a base station according to the first embodiment of the present invention.

Referring to FIG. 3, the delivery terminal 110 obtains a terminal identifier (MSID) of the terminals 120 and 130 participating in direct communication, transmits terminal identifier information to the base station 100, and the base station 100 Register it. Accordingly, the base station 100 may identify terminals to which a direct communication link is connected.

At this time, the delivery terminal 110 needs to know a terminal that is not registered in the base station 100. To this end, the base station 100 may broadcast an advertisement message (eg, AAI-DMMS-ADV message) including a terminal identifier list registered periodically or aperiodically. The AAI-DMMS-ADV message can be mixed with the AAI_DC-MM-ADV message.

Accordingly, the delivery terminal 110 can know the terminal identifier registered in the base station 100. If the terminal identifier obtained from another terminal participating in direct communication is not included in the terminal identifier list received from the base station, the transmitting terminal 110 may recognize the new terminal identifier. In this case, the transmitting terminal 110 may request the base station 100 to update the terminal identifier list. That is, the transmitting terminal 110 transmits an AAI-DMLU-REQ message (which may be mixed with an AAI-DC-LU-REQ message) requesting an update to the base station 100, and transmits an update request from the base station 100 to the base station 100. By receiving the AAI-DMLU-RSP message (AAI-DC-LU-RSP message) that is a response to the new terminal identifier can be registered in the base station 100.

Here, although only the case of registering a new terminal identifier has been described as an example, the same may be applied to the case where the direct communication link is released to delete the already registered terminal identifier.

Meanwhile, there is a need to define a message that connects the traffic setting of the infrastructure communication and the direct communication link.

Table 1 shows messages associated with each function in a one-to-one communication procedure performing unicast transmission, and FIG. 2 shows messages associated with each function in a one-to-many communication procedure performing multicast transmission.

function Infrastructure communication Direct communication link Paging PAG-ADV DM-PAG-ADV Link Establishment DSA-REQ / RSP / ACK DM-LEST-REQ / RSP Flow Management DSx-REQ / RSP / ACK DM-DSx-REQ / RSP / ACK Link Release DSD-REQ / RSP / ACK DM-LREL-REQ / RSP

function Infrastructure communication Direct communication link Link Establishment DSA-REQ / RSP / ACK DM-LEST-CMD Flow Management DSx-REQ / RSP / ACK DM-DSx-CMD Link Release DSD-REQ / RSP / ACK DM-LREL-CMD

As shown in Table 1 and Table 2, the procedure corresponding to link establishment in direct communication (for example, Direct Mode-Link Establishment-Reqeust / Response) or DM-LEST-CMD (Direct Mode-Link Establishment-Command) is associated with flow establishment procedures (e.g., DSA-REQ / RSP / ACK (Dynamic Service Addition-Request / Response / Acknowledgement)) in infrastructure communications, and Link in Direct Communications. Release (e.g., Direct Mode-Link Release-Request / Response (DM-LREL-REQ / RSP) or Direct Mode-Link Release-Command (DM-LREL-CMD)) flow release procedures in infrastructure communications. (Eg, Dynamic Service Deletion-Request / Response / Acknowledgement (DSD-REQ / RSP / ACK)). Flow management procedures (eg, DM-DSx-REQ / RSP / ACK or DM-DSx-CMD) in direct communication are associated with flow management procedures (eg, DSx-REQ / RSP / ACK) in infrastructure communication. Here, the DM-LEST-REQ / RSP message may be mixed with an AAI (Advanced Air Interface-Direct) -DC (Direct Communication) -LEST-REQ / REQ message. The DM-DSx-REQ / RSP / ACK message may be mixed with the AAI-DC-DSx-REQ / RSP / ACK message. The DM-LREL-REQ / RSP message may be mixed with the AAI-LREL-REQ / RSP message. The DM-LEST-CMD message may be mixed with the AAI-DC-LEST-CMD message. The DM-DSx-CMD message may be mixed with the AAI-DC-DSx-CMD message. The DM-LREL-CMD message may be mixed with the AAI-DC-LREL-CMD message.

4 and 5 illustrate an example of a signaling procedure in which a link establishment function of direct communication and a traffic connection establishment function of infrastructure communication are associated.

Referring to FIG. 4, in the case of one-to-one direct communication link, the flow setting function of the infrastructure communication between the base station 100 and the transmitting terminal 110 is performed according to a unicast procedure (exchange of DSA-REQ / RSP / ACK message). In operation S400, a link setting function of direct communication between the delivery terminal 110 and the terminal 120 is performed according to a one-to-one procedure (exchange of DM-LEST-REQ / RSP) (S410).

Thereafter, the delivery terminal 110 may transfer data to each other using a flow of infrastructure communication and a link of direct communication (S420).

If it is necessary to add a traffic connection (ie, a service flow), the flow setting function of the infrastructure communication between the base station 100 and the transmitting terminal 110 is performed according to the unicast procedure (DSA-REQ / RSP / ACK message). (S430), and the flow management function of the direct communication between the delivery terminal 110 and the terminal 120 is performed according to a one-to-one procedure (DM-DSA-REQ / RSP / ACK) (S440).

Accordingly, the additional service flow between the base station 100 and the delivery terminal 110 and the delivery terminal 110 and the terminal 120 may be activated (S450).

The flow setup procedure can be integrated in a 3-way handshake.

Referring to FIG. 5, in the case of a one-to-many direct communication link, the flow setting function of the infrastructure communication between the base station 100 and the transmitting terminal 110 is performed according to a unicast procedure (exchange of DSA-REQ / RSP / ACK messages). (S500), the link setting function of the direct communication between the delivery terminal 110 and the terminal 120 is performed according to the one-to-many procedure (transmission of the DM-LEST-CMD) (S510). Thereafter, the delivery terminal 110 may transfer data to each other using a flow of infrastructure communication and a link of direct communication (S520).

If it is necessary to add a service flow, the flow setting function of the infrastructure communication between the base station 100 and the delivery terminal 110 is performed according to the unicast procedure (exchange of DSA-REQ / RSP / ACK message) (S530). The flow management function of the direct communication between the delivery terminal 110 and the terminal 120 is performed according to a one-to-one procedure (DM-DSA-CMD) (S540).

Accordingly, an additional service flow between the base station 100 and the delivery terminal 110 and the delivery terminal 110 and the terminal 120 may be activated (S550).

As such, a traffic connection for infrastructure communication may be established between the base station 600 and the delivery terminal 610, and a link for direct communication may be established between the delivery terminal 610 and the terminal 620. Accordingly, although the terminals 610 and 620 participating in the direct communication cannot directly transmit data for direct communication to the backbone network, they may be transmitted using infrastructure communication.

Hereinafter, a method of using infrastructure communication to expand a service area in which direct communication is possible according to a second embodiment of the present invention will be described.

6 shows a communication environment according to a second embodiment of the present invention.

Referring to FIG. 6, the communication environment according to the second embodiment of the present invention includes a base station 600 and at least one terminal 6610 and 620. Here, the terminals 610 and 620 may perform direct communication between the terminals. In this case, the terminals 610 and 620 may be located in an area in which infrastructure communication with the base station is possible, and may perform infrastructure communication with the base station 600. The terminals 610 and 620 may independently operate direct communication and infrastructure communication.

The base station 600 performs a function of connecting traffic between the terminals 610 and 620 without transmitting data received from the terminals 610 and 620 to the gateway. For example, when the terminal 610 and the terminal 620 want to perform direct communication, the terminals 610 and 620 set the base station 600 and the service flows FID k and FID n, respectively. The base station 600 transmits the traffic through the service flow FID k with the terminal 610 to the service flow FID n with the terminal 620, and transmits the service flow FID n with the terminal 620. Traffic through the service flow (FID k) with the terminal 610.

Accordingly, the terminal 610 and the terminal 620 may perform direct communication through the base station 600. Even when the base station 600 is not connected to the backbone network or when some functions are destroyed due to a disaster or the like, the service radius capable of direct communication between terminals may be widened.

To do this, it is necessary to define nodes and messages.

7 is a flowchart illustrating a procedure for supporting direct communication between terminals by a base station according to a second embodiment of the present invention. Here, it is assumed that the base station provides a service to terminals in the base station without being connected to the backbone network.

Referring to FIG. 7, the base station 600 broadcasts a broadcast message including system information to the terminals 610 and 620 (S700). The broadcast message including system information (AAI-MM-ADV with Action Type == 0b100) may be information indicating that a limited service can be provided without being connected to the backbone network. The base station 600, which is not connected to the backbone network, cannot set up all connections and transmit / receive traffic requiring a backbone connection. Accordingly, after receiving the corresponding message from the base station 600, the terminals 610 and 620 perform a network entry procedure (S710), request the setting of a service that does not require a backbone connection (S720), and the base station 600. It can exchange traffic with (S730).

8 is a flowchart illustrating a procedure of registering information of communication terminals directly with a base station according to the second embodiment of the present invention.

Referring to FIG. 8, terminals 610 and 620 having a direct communication interface among the terminals connected to the base station 600 transmit a direct communication terminal registration request message to the base station 620 (S800 and S820). The direct communication terminal registration request message may include terminal information (eg, terminal identifier). If the terminals 610 and 620 are forwarding terminals that provide a forwarding function to other terminals having a direct communication interface, information of other terminals may also be included in the direct communication terminal registration request message.

Upon receiving the direct communication terminal registration request message, the base station 600 transmits a direct communication terminal registration response message to the terminals 610 and 620 (S810 and S830).

On the other hand, the base station 600 may collect the information of the terminal capable of direct communication by using a direct communication terminal registration request message received from the terminals 610 and 620. The base station 600 broadcasts the collected terminal information through a direct communication terminal information advertisement message (S840 and S850). The direct communication terminal information advertisement message may be sent periodically or aperiodically. The information of the terminal included in the direct communication terminal information advertisement message may include information of the terminal capable of direct communication while being connected to the base station and the infrastructure communication interface. And, although not connected to the infrastructure communication interface, it may further include information of the terminal that can directly communicate with the delivery terminal.

When the base station 600 receives the direct communication terminal registration request message from the terminals 610 and 620, the base station 600 is a terminal included in the direct communication terminal information advertisement message according to the information included in the direct communication terminal registration request message. You can change the information.

9 and 10 are flowcharts illustrating a service setting procedure according to a second embodiment of the present invention. It illustrates that the base station knows the information of the other terminal 620 to which the terminal 610 communicates directly.

Referring to FIG. 9, the terminal 610 transmits a service setting request message to the base station 600 to request connection setting with the terminal 620 (S900). The service setting request message may further include an identifier of a source terminal (terminal 610) and an identifier of a destination terminal (terminal 620) as well as service flow parameters for general service configuration. .

The base station 600 receiving the service setting request message transmits a service setting response message to the terminal 610 in response thereto (S910). The service configuration response message may include a service flow parameter including a result of processing the service configuration request message and a service flow ID.

The terminal 610 receiving the service configuration response message transmits a service configuration confirmation message to the base station 600 in response (S920).

The base station 600 transmits the service setting request message to the terminal 620 using the identifier of the destination terminal included in the service setting request message transmitted from the terminal 610 (S930). The service configuration request message transmitted by the base station 600 may include not only service flow parameters for general service configuration, but also an identifier of a source terminal and an identifier of a destination terminal for a classification function.

Upon receiving the service setting request message, the terminal 620 transmits a service setting response message to the base station 600 (S940), and the base station 600 responds with a service setting confirmation message (S950).

Referring to FIG. 10, the terminal 610 transmits a service setting request message to the base station 600 to request connection setting with the terminal 620 (S1000). The service configuration request message may further include an identifier of the source terminal (terminal 610) and an identifier of the destination terminal (terminal 620) as well as service flow parameters for general service configuration. .

The base station 600 transmits the service setting request message to the terminal 620 using the identifier of the destination terminal included in the service setting request message transmitted from the terminal 610 (S1010). The service configuration request message transmitted by the base station 600 may include not only service flow parameters for general service configuration, but also an identifier of a source terminal and an identifier of a destination terminal for a classification function.

Upon receiving the service setting request message, the terminal 620 transmits a service setting response message to the base station 600 in response (S1020). In addition, the base station 600 transmits a service setting response message to the terminal 610 (S1030). The service configuration response message may include a service flow parameter including a result of processing the service configuration request message and a service flow ID.

Receiving the service setting response message, the terminal 610 transmits a service setting confirmation message to the base station 600 in response (S1040). In addition, the base station 600 transmits a service setting confirmation message to the terminal 620 (S1050).

9 and 10, the identifier of the source terminal and the identifier of the destination terminal defined in the service configuration request message are IPv4 / IPv6 or IEEE802.3 of the source terminal when the CS Specification parameter is set to IPv4 / IPv6 or IEEE802.3. The address is set. However, for a direct communication service that does not use the address as an identifier, it is necessary to define a new CS Specification Parameter. Table 3 shows an AAI-DSA-REQ message according to an embodiment of the present invention.

Field Size  ( bits ) Value Of Description Condition ...... ...... ...... ...... CS Specification parameter 8 0: Reserved
1: Packet, IPv4
2: Packet, IPv6
3: Packet, IEEE 802.3 / Etherneta
4: Reserved
5: Reserved
6: Reserved
7: Reserved
8: Reserved
9: Reserved
10: Reserved
11: Reserved
12: Reserved
13: Reserved
14: Packet, IPb
15: Multiprotocol flow
16- 17: Reserved
18: Talk - around DC
19 -255: Reserved
(a: Classifiers for IEEE 802.1Q VLAN tags may be applied to service
flows of this CS type)
(b: SDUs for service flows of this CS type may carry either IPv4 or IPv6 in the payload) Present if needed ...... ...... ...... ...... inner IPv6 Flow
8 Label IPv6 Flow Label of inner IP header Present if needed Source DCTID 24 Indicates  a source HR - MS  addresses for talk - around DC Present if needed Target DCTID 24 Indicates  a target HR - MS addresses  for talk - around DC Present if needed } // End If (Packet Classification
Rule) ...... ...... ...... ...... }

In Table 3, a new CS Specification parameter (Talk-around DC) for direct communication is defined. That is, an identifier of a source terminal or an identifier of a destination terminal for direct communication may be newly defined in the service setting request message. For example, in case of unicast, direct communication terminal identification (DCTID) may be defined, and in case of broadcast / multicast, direct communication group identification (DCGID) may be defined.

9 and 10 illustrate only a service setting procedure, a service change procedure and a service release procedure may be similarly applied.

11 is a flowchart illustrating a service setting procedure according to a second embodiment of the present invention. For example, the base station 600 does not know information of another terminal 620 to which the terminal 610 wishes to directly communicate with. For example, when the procedure illustrated in FIG. 8 is not successfully performed or when the terminal is in the idle mode, the base station may not know the information of the terminal.

Referring to FIG. 11, a service setting procedure between the terminal 610 and the base station 600 is performed (S1100). The service setting procedure may be performed like the procedure illustrated in FIG. 9 (steps S900 to S920).

Since the base station 600 does not know the information of the other terminal 620 which the terminal 610 wishes to directly communicate with, the direct communication service advertisement message (AAI-SA-BPAG (Blind) to induce the service setting procedure of the terminal 620. Paging) -ADV (Advertisement)) is broadcasted (S1110 and S1120). The direct communication service advertisement message may be received by all terminals regardless of the state of the terminal (eg, idle mode or active mode). Table 4 is an example of a direct communication service advertisement message according to an embodiment of the present invention.

Field Size  ( bits ) Value Of Description Condition For  ( i = 0; i < Num _ BPAG ; i ++)
{ Num _ BPAG indicates the number of blind  paging items DCTID 24 Indicates  a target HR - MS address for  talk-around direct communication Action code One Used to indicate the purpose of the  AAI-SA-BPAG-ADV message
0 b0 : send AAI - SA - BPAG - ACK message if  active or perform network reentry if idle
0 b1 : reserved }

Referring to Table 4, the direct communication service advertisement message may include identifier information of the terminal 620 which is a service setting request target.

Meanwhile, system information (eg, advertisement period, message offset, etc.) necessary for receiving a direct communication service advertisement message may be periodically broadcasted through a system information transmission message (AAI-System Confirguration Descriptor). Table 5 is an example of a system information transmission message according to an embodiment of the present invention.

Multicast Group Zone ID 12 Indicates  a Multicast Group Zone ID  provided by this BS .
Shall note be set to  "0." In HR - Network Multicast  Indication cycle 8 Start of multicast indication cycle .
The first superframe is the multicast  available interval and rest superframes are  the multicast unavailable interval .

8 LSB of superframe number Shall be present  unless Multicast  Group Zone is  set to  "0" in HR - Network HR Multimode indication 2 Indicates whether current BR Of RS is HR -MS acting as BS Of RS or HR - BS acting as RS
0 b00 : current BS Of RS is neither HR - MS  acting as BS Of RS nor HR - BS acting as RS
0 b01 : current BS Of RS is HR - MS acting as BS Of RS
0 b10 : current BS Of RS is HR - BS acting as RS
0 b11 : reserved HR Multimode indication
Shall be present in  HR- Networks Blind Paging Offset 12 Indicates the number of TDC frames used  for blind paging offset Present if need in HR - Networks Blind Paging Cycle 4 Indicates the number of TDC  frames with that  a blind paging  listening interval repeats Present if need in HR - Networks

Referring to Table 5, the terminal may obtain information about a blind paging cycle and information about a blind paging offset from a system information transmission message. The terminal may induce the start of the blind paging interval based on the information on the blind paging cycle and the information on the blind paging offset. For example, an interval for receiving a direct communication service advertisement message may start at a superframe that satisfies Nsuperframe modulo Blind Paging Cycle == Blind Paging Offset.

On the other hand, when the direct communication service advertisement (AAI-SA-Blind Page) -ADV (Advertisement) message includes only the identifier of the terminal 620, and the terminal 620 that receives it matches the identifier thereof, If the terminal 620 is in the idle mode, the network re-entry procedure is performed (S1130). In this case, the network reentry in the idle mode by direct communication may be indicated in the ranging request message for the ranging purpose. Table 6 illustrates a ranging request message (AAI_RNG_REQ) according to an embodiment of the present invention.

Field Size  (bits) Value Of Description Condition Ranging Purpose Indication 4 0b0000 = Initial network entry
0b0001 = HO reentry
0b0010 = Network reentry from idle mode
0b0011 = Idle mode location update 0b0100 = DCR mode extension
0b0101 = Emergency call setup (eg, E911)
0b0110 = Location update for updating service flow management encodings of E-MBS flows
0b0111 = Location update for transition to DCR mode from idle mode
0b1000 = Reentry from DCR mode, coverage loss or detection of different ABS restart count.
0b1001 = Network reentry from a Legacy BS
0b1010 = Zone switch to MZONE from LZONE
0b1011 = Location update due to power down.
0b1100 = Interference mitigation request to a CSG Femto ABS when experiencing interference from the CSG Femto ABS
0b1101 = NS / EP call setup

0 b1110 = HR multicast service flow update
0 b1111 = Extended Ranging Purpose - Extended Ranging  Purpose Indication 4 0 b0000  = Network reentry from idle mode for  extension of TDC .
0 b0001 ~ 0 b1111  = reserved

In addition, the base station 600 performs a service setting procedure with the terminal 620 (S1140). The service setting procedure may be performed as in the procedure illustrated in FIG. 9 (steps S930 to S950). Thereafter, a traffic exchange procedure may be performed between the base station 600 and the terminal 610 and between the base station 600 and the terminal 620 (S1150 and S1160).

On the other hand, when the terminal 620 is in the active mode, the terminal 620 omits the network re-entry procedure, and directly informs the base station 600 of the communication service advertisement notification (AAI-SA-BPAG-Blind Page) Acknowledgment (ACK). By transmitting a message, it is possible to inform the base station 600 that the connection can be established (S1170). The direct communication service advertisement notification message may include its identifier (DCTID) and its MAC address. Table 7 shows a direct communication service advertisement notification message according to an embodiment of the present invention.

Field Size  ( bits ) Value Of Description Condition Target DCTID 24 Indicates  a target HR - MS address for talk - around  direct communication Target MAC address 24 Indicates  a target HR - MS MAC address for  infrastructure communication

If the direct communication service advertisement message includes the identifier information of the terminal 620 which is a service setting request target and the identifier information of the terminal 610 to communicate with the terminal 620, the terminal 620 is started by the terminal. That is, it may perform a terminal-initiated service setting procedure. For example, when the terminal 620 is in an idle mode, the terminal 620 may perform a terminal-initiated service setting procedure after performing a network entry procedure. When the terminal 620 is in the active mode, the terminal-initiated service setting procedure may be performed without performing a network entry procedure.

Table 8 defines the MAC control messages used in the method of the present invention.

No . Functional Areas Message names Message description Secuirty Connection TBD Multicast AAI - MG - IND Multicast Group  Indication Message Broadcast TBD Multicast AAI - MT - IND Multicast Traffic  Indication Message Broadcast or Multicast TBD Standalone AAI - SA - BPAG - ADV Blind Page  Advertisement Message Broadcast TBD Standalone AAI - SA - BPAG - ACK Blind Page ACK message Unicast

12 illustrates a terminal and a base station that can be applied to an embodiment of the present invention.

Referring to FIG. 12, a mobile communication system includes a terminal 1200 and a base station 1300. The terminal 1200 and the base station 1300 include a processor 1210 and 1310, a memory 1220 and 1320, and a radio frequency (RF) unit 1230 and 1330, respectively. The processors 1210 and 1310 may be configured to implement the procedures and / or methods proposed by the present invention. The memories 1220 and 1320 are connected to the processors 1210 and 1310 and store various information related to the operation of the processors 1210 and 1310. The RF units 1230 and 1330 are connected to the processors 1210 and 1310 and transmit and / or receive a radio signal. The base station 1300 and / or the terminal 1200 may have a single antenna or multiple antennas.

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (13)

In the method that the first terminal supports direct communication using infrastructure communication,
Establishing at least one direct communication link with at least one second terminal,
Establishing at least one traffic connection with the base station, and
The data transmitted from the at least one second terminal through the at least one direct communication link to the at least one traffic connection, or the data transmitted from the base station via the at least one traffic connection to the at least one Passing directly to the communication link
&Lt; / RTI &gt; The method of claim 1,
Setting up the traffic connection,
Transmitting a service addition request (DSA_REQ) message to the base station;
Receiving a Dynamic Service Addition Response (DSA_RSP) message from the base station, and
And transmitting a Dynamic Service Addition Acknowledgment (DSA_ACK) message to the base station. The method of claim 1,
Setting up the direct communication link,
Transmitting a direct mode link establishment request (DM-LEST-REQ) message to the second terminal; and
Receiving a direct mode link establishment response (DM-LEST-RSP) message from the second terminal;
&Lt; / RTI &gt; The method of claim 1,
Setting up the direct communication link,
Transmitting a Direct Mode Link Establishment Command (DM-LEST-CMD) message to the second terminal;
&Lt; / RTI &gt; The method of claim 1,
Obtaining identifier information of the at least one second terminal, and
Transmitting the identifier information to the base station
&Lt; / RTI &gt; The method of claim 5,
Receiving a broadcast message from the base station, the broadcast message including an identifier list registered with the base station, and
Transmitting an identifier list update request to the base station based on the identifier list
&Lt; / RTI &gt; In the method that the first terminal supports direct communication using infrastructure communication,
Performing a service setting procedure with a base station to directly communicate with at least one second terminal;
Including,
The service setting request message (DSA-REQ) message is transmitted to the base station, and the service setting request message includes identifier information of the first terminal and identifier information of the second terminal. How to. The method of claim 7, wherein
The identifier information of the second terminal is identifier information of the second terminal or identifier information of a group to which the second terminal belongs. In the method in which the first terminal performs direct communication using infrastructure communication,
Receiving system information including an advertisement period and an advertisement offset from the base station,
Receiving an advertisement message for direct communication service setting from the base station using the advertisement period and the advertisement offset, and
When the advertisement message includes the identifier of the first terminal, performing a service setting procedure with the base station
&Lt; / RTI &gt; 10. The method of claim 9,
The advertisement message instructs to perform a network entry procedure when the first terminal is in an idle mode, and further includes an action code instructing to transmit a response to the advertisement message to the base station when the first terminal is in an active mode. How to include. 10. The method of claim 9,
Transmitting the ranging request message to the base station when the first terminal is in the idle mode;
The ranging request message includes a ranging purpose, wherein the ranging purpose indicates that the ranging request is intended to re-enter the network in an idle mode for direct communication. 10. The method of claim 9,
When the first terminal is in an active mode, transmitting the response message to the base station to the base station;
The response message includes an identifier of the first terminal and a medium access control (MAC) address. 10. The method of claim 9,
Performing direct communication with a second terminal that is previously set up with the base station and requested to communicate with the first terminal directly;
&Lt; / RTI &gt;
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Cited By (5)

* Cited by examiner, † Cited by third party
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WO2015048497A1 (en) * 2013-09-26 2015-04-02 Intel IP Corporation Systems, methods, and devices for cellular network-assisted low cost opportunistic social networking
KR20150116552A (en) * 2014-04-07 2015-10-16 한국전자통신연구원 Integrated base station and terminal unit
US9198201B2 (en) 2012-07-10 2015-11-24 Electronics And Telecommunications Research Institute Method of direct communication between terminals respectively connected and unconnected to base station
US20160085360A1 (en) * 2013-05-14 2016-03-24 Shenzhen Huiding Technology Co., Ltd. Method for controlling state of touch screen, touch screen, and portable touch terminal
WO2018151534A1 (en) * 2017-02-15 2018-08-23 엘지전자 주식회사 Method for relaying paging and relay user equipment, and paging reception method and remote user equipment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9198201B2 (en) 2012-07-10 2015-11-24 Electronics And Telecommunications Research Institute Method of direct communication between terminals respectively connected and unconnected to base station
US20160085360A1 (en) * 2013-05-14 2016-03-24 Shenzhen Huiding Technology Co., Ltd. Method for controlling state of touch screen, touch screen, and portable touch terminal
US10146356B2 (en) * 2013-05-14 2018-12-04 Shenzhen GOODIX Technology Co., Ltd. Method for controlling state of touch screen, touch screen, and portable touch terminal
WO2015048497A1 (en) * 2013-09-26 2015-04-02 Intel IP Corporation Systems, methods, and devices for cellular network-assisted low cost opportunistic social networking
KR20150116552A (en) * 2014-04-07 2015-10-16 한국전자통신연구원 Integrated base station and terminal unit
WO2018151534A1 (en) * 2017-02-15 2018-08-23 엘지전자 주식회사 Method for relaying paging and relay user equipment, and paging reception method and remote user equipment
US11012972B2 (en) 2017-02-15 2021-05-18 Lg Electronics Inc. Method for relaying paging and relay user equipment, and paging reception method and remote user equipment

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