KR20130048147A - Communication method for relay, terminal and communication method thereof - Google Patents

Abstract

PURPOSE: A repeater communication method, a terminal, and a communication method thereof are provided to offer a wireless communication service when a base station gets damaged. CONSTITUTION: A process(132) is connected to an RF(Radio Frequency) module. When scanning section information is requested from the base station, the process transmits a message including the scanning section information to the lower terminal. The process receives wireless synchronization from an upper base station according to the scanning section information. The process requests the scanning section information to the upper base station. [Reference numerals] (132) Processor; (134) Memory; (136) Module

Description

Repeater communication method, terminal and terminal communication method {COMMUNICATION METHOD FOR RELAY, TERMINAL AND COMMUNICATION METHOD THEREOF}

The present invention relates to a relay communication method, a terminal and a communication method of the terminal.

In the event of a disaster or disaster, important infrastructure can be destroyed or damaged. Various infrastructures such as wireless telephones, landline telephones, and Internet networks are considered as important initiatives for social infrastructure. If these communication facilities are destroyed or damaged, social congestion may be increased and social resilience may be difficult to secure.

Therefore, high reliability support, which provides a way to quickly recover or replace a telecommunications facility, is important in these situations.

In particular, when the base station that plays a key role in the communication of the mobile terminal is damaged or the power line is not available to perform the role as the base station may be out of service area.

As such, it is necessary to provide a means for providing a wireless communication service in an unserviceable area due to damage of a base station.

The problem to be solved by the present invention is to continue to provide a wireless communication service even if the base station is damaged.

According to an embodiment of the present invention, a communication method of a terminal is provided. The communication method of the terminal, the step of selecting a terminal to serve as a repeater; Receiving a first message including scanning interval information from an upper base station; Transmitting a second message including the scanning interval information to a lower terminal receiving a service by establishing a temporary network by the terminal; And receiving wireless synchronization from the base station according to the scanning interval information.

The communication method of the terminal may further include transmitting a third message requesting the scanning interval information to the higher base station.

Receiving the first message may include receiving the first message from the upper base station when the terminal initially accesses the higher base station.

The first message and the second message may include a field of the scan interval, a start superframe index field, a start frame index field, and an interleaving interval field.

The third message may include a scanning interval control field and a synchronization search interval control field.

The transmitting of the second message may include transmitting the second message to the lower terminal when receiving the scanning request message from the lower terminal.

The terminal may operate in a TTR relay mode.

According to another embodiment of the present invention, a communication method of a repeater is provided. The communication method of the repeater, if there is a problem in the base station, selecting a repeater for relaying between the base station and the lower terminal of the base station; Receiving a first message including scanning interval information from the base station; Transmitting a second message including the scanning interval information to the lower terminal; And receiving wireless synchronization from the base station according to the scanning interval information.

The communication method of the repeater may further include transmitting a message requesting the scanning interval information to the base station.

Receiving the first message may include receiving the first message from the base station when the repeater initially accesses the base station.

The first message and the second message may include a field of the scan interval, a start superframe index field, a start frame index field, and an interleaving interval field.

According to another embodiment of the present invention, a terminal is provided. The terminal, the RF module; And a process connected to the RF module, wherein the process is configured to transmit a message including the scanning interval information to a lower terminal when the terminal selected as a relay and a request for scanning interval information is received from a higher base station. The mobile station may be configured to receive wireless synchronization from the upper base station according to the scanning interval information.

The process may request the scanning interval information to the higher base station.

The message may include a field of the scan interval, a start superframe index field, a start frame index field, and an interleaving interval field.

According to an embodiment of the present invention, a relay mode multi-function terminal or a separate mobile repeater may establish a temporary network in an out-of-service area to continuously provide communication services to lower terminals.

According to an embodiment of the present invention, even if the mobile repeater or the relay mode multi-function terminal is moving or located indoors, wireless synchronization with the upper base station can be performed to perform normal operation.

1 is a diagram illustrating a case where a base station is damaged in a mobile communication system according to an embodiment of the present invention.
2 is a mobile relay or relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) according to an embodiment of the present invention receives the radio synchronization (A-Preamble) from the upper base station (200, Superordinate HR-BS) It is a figure which shows the method to do.
3 is a mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) according to another embodiment of the present invention. A diagram illustrating a method of receiving a preamble.
4 is a diagram illustrating a mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) according 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, a mobile station (MS) is a terminal, a mobile terminal (MT), a mobile station (MS), an advanced mobile station (AMS), a high reliability mobile station (high). It may refer to a reliability mobile station (HR-MS), a subscriber station (SS), a portable subscriber station (PSS), an access terminal (AT), a user equipment (UE), or the like. It may also include all or part of the functions of the terminal, MT, AMS, HR-MS, SS, PSS, AT, UE and the like.

Also, a base station (BS) is an advanced base station (ABS), a high reliability base station (HR-BS), a node B, an evolved node B, eNodeB), an access point (AP), a radio access station (RAS), a base transceiver station (BTS), a mobile multihop relay (MMR) BS, RS, HR, RS, etc.) may be referred to as a high reliability relay station (HR-RS) -RS, and the like.

Now, a repeater communication method, a terminal, and a communication method thereof will be described in detail with reference to the drawings.

1 is a diagram illustrating a case where a base station is damaged in a mobile communication system according to an embodiment of the present invention.

The mobile communication system according to an exemplary embodiment of the present invention includes a base station 200 and lower terminals 110, 120, and 130 in a cell serviced by the base station 200. Here, the base station 200 is a damaged base station that does not properly perform the dynamics of the base station, hereinafter referred to as a "superordinate high reliability base station (Superordinate HR-BS)".

When the upper base station 200 (Superordinate HR-BS) is damaged, a service unavailable area occurs, so that the lower terminals 110, 120, and 130 have problems in the mobile communication service, but in the embodiment of the present invention, the lower terminals 110 and 120 130) A terminal serving as a relay is selected. The terminal selected as a terminal serving as a relay is hereinafter referred to as a 'relay mode multi-function terminal (HR-MS acting as relay)'. In this way, the selected relay mode multi-air terminal 130 (HR-MS acting as relay, 130) plays a role of a relay, the temporary network is established and operated, the lower terminals (110, 120) can continue to receive services.

As described above, the terminal may serve as a repeater, but a separate mobile relay station (Mobile Relay Station, Mobile RS) communicating with the upper base station 200 (Superordinate HR-BS) may construct and operate a temporary network. Although not illustrated in FIG. 1, a mobile RS is located in a cell serviced by a higher base station 200 (Superordinate HR-BS). By the mobile RS, the lower terminals 110, 120, and 130 may continue to receive services.

In this way, a mobile RS or a relay mode multi-function terminal (HR-MS acting as relay) that constructs and operates a temporary network is collectively referred to as a mobile RS or HR-MS. acting as relay).

The mobile repeater / relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) according to an embodiment of the present invention operates in a timedivision-transmit and receive (TTR) relay mode. Mobile RS or HR-MS acting as relay, operating in TTR relay mode, establishes and operates a temporary network with a higher frequency base station (200, Superordinate HR-BS) and wireless synchronization (A-Preamble). ) Is necessary. The mobile repeater / relay mode multifunction terminal (Mobile RS or HR-MS acting as relay) may receive an A-Preamble from an upper base station 200 (Superordinate HR-BS) upon initial access. However, even when a mobile RS or HR-MS acting as relay moves or is located indoors, A-Preamble is transmitted from an upper base station 200 (Superordinate HR-BS) through a relay link. I need a way to receive it. That is, the mobile repeater / relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) is connected to the upper base station 200 (Superordinate HR-BS) through the relay link in addition to the initial access to the upper base station 200 (Superordinate HR-BS). There is a need for a method of receiving A-Preamble from a BS.

Hereinafter, a mobile RS or HR-MS acting as relay operating in the TTR relay mode is wirelessly synchronized from the upper base station 200 (Superordinate HR-BS) through a relay link (A-Preamble). It describes a method and procedure for receiving.

On the other hand, a mobile RS / relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) to set up a relay link with the upper base station (200, Superordinate HR-BS) in the IEEE 802.16n or IEEE 802.16m Since it is described in detail, a detailed description thereof will be omitted.

2 is a mobile relay or relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) according to an embodiment of the present invention receives the radio synchronization (A-Preamble) from the upper base station (200, Superordinate HR-BS) It is a figure which shows the method to do. In FIG. 2, the mobile repeater / relay mode multi-function terminal (Mobile RS or HR-MS acting as relay) is shown as 130 ', the mobile repeater / relay mode multi-function terminal (130', Mobile RS or HR-MS acting as relay) The sub-networks (Subordinate HR-MSs) that are continuously serviced by the ad hoc network are established as 110 '. The lower terminals 110 ′ (Subordinate HR-MSs) may correspond to the lower terminals 110 and 120 in FIG. 1.

First, the mobile repeater / relay mode multi-function terminal (130 ', Mobile RS or HR-MS acting as relay) is a synchronization request message (Advanced Air Interface Multimode Relay) to the upper base station (200, Superordinate HR-BS) through the already established relay link. Synchronization Request, AAI-MMRS-SYN-REQ) is transmitted (S220). Section for receiving A-Preamble in the synchronization request message (AAI-MMRS-SYN-REQ) transmitted by the mobile repeater / relay mode multifunction terminal 130 ', Mobile RS or HR-MS acting as relay This includes requesting and controlling the.

Table 1 below shows a format of a synchronization request message (AAI-MMRS-SYN-REQ). As shown in Table 1, the sync request message (AAI-MMRS-SYN-REQ) includes a scan duration control field and a sync interval control field. The mobile repeater / relay mode multi-function terminal 130 ', the mobile RS or HR-MS acting as relay, via the synchronization request message (AAI-MMRS-SYN-REQ) including such a field, the upper base station 200, Superordinate. The frequency of the A-Preamble reception from the HR-BS may be controlled.

For example, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) has a high moving speed or the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS) Acting as relay is located in the room, the error of A-preamble occurs frequently. In this case, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) may request a sync request message (AAI) to set a longer scanning interval and a shorter synchronization search interval. -MMRS-SYN-REQ) to transmit to the upper base station 200 (Superordinate HR-BS).

AAI-MMRS-SYN-REQ message format Field Size (bits) Value / Description Condition Scan duration control One 0b0: increase the time duration
0b1: decrease the time duration Time interval control One 0b0: increase the time interval
0b1: decrease the time interval

The upper base station 200 (Superordinate HR-BS) that receives the AAI-MMRS-SYN-REQ message through the relay link sets a scanning duration corresponding to the request information. That is, the mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) receives the A-Preamble of the upper base station 200 (Superordinate HR-BS) to perform a synchronization timing offset. To be able to track, the upper base station 200 (Superordinate HR-BS) sets a scan duration. In addition, the upper base station 200 (Superordinate HR-BS) is a mobile repeater / relay mode multi-function terminal to send a synchronization response message (Advanced Air Interface Multimode Relay Synchronization Response, AAI-MMRS-SYN-RSP) including a scan duration (130 ', Mobile RS or HR-MS acting as relay) and transmits (S240).

Table 2 below shows the format of the synchronization response message (AAI-MMRS-SYN-RSP). As shown in Table 2, the sync response message (AAI-MMRS-SYN-RSP) includes not only the Scan duration field, but also a Start superframe index field, a Start frame index field, Interleaving interval field is included. The mobile repeater / relay mode multi-function terminal 130 ′, which receives the synchronization response message (AAI-MMRS-SYN-RSP), is a higher base station 200 (Superordinate HR-BS). A-Preamble can be received from the.

AAI-MMRS-SYN-RSP message format Field Size (bits) Value / Description Condition Scan duration 8 Duration (in units of AAI subframe) of the requested scanning period. If (scan duration> 0) { Start superframe index 6 Represents the 6 least significant bits of the absolute superframe index in which the first scanning interval starts. Start frame index 2 Represents start frame number in the Start super frame number.
0b00: 1st frame in the super frame
0b01: 2nd frame in the super frame
0b10: 3rd frame in the super frame
0b11: 4th frame in the super frame Interleaving interval 8 The period of relay mode HR-MS's active mode (in units of AAI subframes) that is interleaved between scan durations. } // End if (Scan duration> 0)

The mobile repeater / relay mode multi-function terminal 130 ′, which receives the synchronous response message (AAI-MMRS-SYN-RSP), has a synchronous advertisement including scanning duration information. A message (Advanced Air Interface Multimode Advertisement, AAI-MM-ADV) is transmitted to its lower terminals 110 '(Subordinate HR-MSs) and notified (S260).

Table 3 below shows a format of the synchronous advertisement message (AAI-MM-ADV). As shown in Table 3, the synchronous advertisement message (AAI-MM-ADV) also has a scanning duration, a start superframe index field, a start frame index field, and an interleaving interval. ) Field. Table 3 is a modification to apply the multi-mode message (AAI-MM-ADV) message format defined in the IEEE 802.16m standard to include the contents of the embodiment of the present invention. That is, the parameters of Table 3 below are added to the parameters of the multimode message (AAI-MM-ADV) in the existing IEEE 802.16m.

AAI-MM-ADV message format Field Size (bits) Value / Description Condition Action Type 4 Used to indicate the purpose of this message
0b1000: Scanning operation for HR-MS acting as relay to maintain synchronization with the serving HR-BS
0b1001-0b1111: reserved ···. } else if (Action Type == 0b1000) { Scan duration 8 Duration (in units of AAI subframe) of the requested scanning period. Interleaving interval 8 The period of relay mode HR-MS's active mode (in units of AAI subframes) that is interleaved between scan durations. Start superframe index 6 Represents the 6 least significant bits of the absolute superframe index in which the first scanning interval starts. Start frame index 2 Represents start frame number in the Start super frame number.
0b00: 1st frame in the super frame
0b01: 2nd frame in the super frame
0b10: 3rd frame in the super frame
0b11: 4th frame in the super frame }

As such, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) sends a synchronous advertisement message (AAI-MM-ADV) to its lower terminals 110 ′ (Subordinate HR-MSs). The reason for sending to is as follows. When the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) receives the A-Preamble from the upper base station 200 (Superordinate HR-BS), the lower terminals ( 110 ', subordinate HR-MSs). Therefore, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) transmits a synchronous advertisement message (AAI-MM-ADV) to the lower terminals 110 ′ (Subordinate HR-MSs). When the mobile repeater / relay mode multifunction terminal 130 '(Mobile RS or HR-MS acting as relay) receives A-Preamble, the lower terminals 110' and Subordinate MSs also perform scanning. Induce. That is, when the mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) receives A-Preamble, the lower terminals 110 ′ (Subordinate HR-MSs) The communication with the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) may be interrupted to prevent malfunction.

Meanwhile, in the above, the mobile repeater / relay mode multi-function terminal (M130 ', Mobile RS or HR-MS acting as relay) is connected to the lower terminals (110', Subordinate HR-MSs) through the synchronous advertisement message (AAI-MM-ADV). ), But not a synchronous advertisement message (AAI-MM-ADV), but a general scanning request message (Advanced Air Interface Scan Request, AAI-SCN-REQ) for the lower terminals (110 ', Subordinate HR-MSs) and Unicast may be transmitted through an advanced air interface scan response (AAI-SCN-RSP). That is, the lower terminals 110 'and Subordinate HR-MSs transmit the scanning request message AAI-SCN-REQ to the mobile repeater / relay mode multi-function terminal 130', Mobile RS or HR-MS acting as relay. In this case, the mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) sends a scanning response message (AAI-SCN-RSP) including the information of Table 3 to the lower terminals 110 ′. , Subordinate HR-MSs).

The mobile repeater / relay mode multi-function terminal 130 ', a mobile RS or HR-MS acting as relay, transmits a synchronization advertisement message (AAI-MM-ADV) or a scanning response message to the lower terminals 110' (Subordinate HR-MSs). After transmitting (AAI-SCN-RSP), the mobile repeater / relay mode multi-function terminal 130 ', the mobile RS or HR-MS acting as relay, the scanning interval set by the upper base station 200 (Superordinate HR-BS) According to the scan duration, an A-preamble is received from a higher base station 200 (Superordinate HR-BS) to track a synchronization timing offset (Sing S280). Subordinate HR-MSs may also perform scanning according to the scanning duration (S280).

On the other hand, the upper base station 200 (Superordinate HR-BS) does not receive the synchronization request message (AAI-MMRS-SYN-REQ), only the synchronization response message (AAI-MMRS-SYN-RSP) mobile repeater / relay mode multi-function terminal ( 130 ', Mobile RS or HR-MS acting as relay). Hereinafter, this will be described with reference to FIG. 3.

3 is a mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) according to another embodiment of the present invention. A diagram illustrating a method of receiving a preamble.

As shown in FIG. 3, when the mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) initially accesses the upper base station 200 (Superordinate HR-BS) (S320). ), The upper base station 200 (Superordinate HR-BS) first transmits a synchronization response message (AAI-MMRS-SYN-RSP) as shown in Table 2 to the mobile repeater / relay mode multi-function terminal 130 ', Mobile RS or HR-MS acting. as relay). That is, the upper base station 200 (Superordinate HR-BS) may move only the synchronization response message (AAI-MMRS-SYN-RSP) without receiving the synchronization request message (AAI-MMRS-SYN-REQ). (130 ', Mobile RS or HR-MS acting as relay) can be set to the initial value for wireless synchronization reception.

Next, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) is a synchronous advertisement message (AAI-MM-ADV) or a scanning response message (AAI-SCN-RSP) as shown in FIG. 2. ) By transmitting to the lower terminals (110 ', Subordinate HR-MSs) to inform (S360).

2, the mobile repeater / relay mode multi-function terminal 130 ′ (Mobile RS or HR-MS acting as relay) is configured in a scanning duration set by the upper base station 200 (Superordinate HR-BS). Accordingly, the A-preamble is received from the upper base station 200 (Superordinate HR-BS) and the synchronization timing offset is tracked (S380). In addition, the lower terminals 110 ′ (Subordinate HR-MSs) may also perform scanning according to the scanning duration (S380).

According to the exemplary embodiment of the present invention, the mobile repeater / relay mode multi-function terminal 130 ′ operating in the TTR relay mode is connected from the upper base station 200 (Superordinate HR-BS). A-Preamble can be received. Through this, even if the mobile repeater / relay mode multi-function terminal (130 ', Mobile RS or HR-MS acting as relay) is moving or indoors, it can synchronize wirelessly with the upper base station (200, Superordinate HR-BS). Normal operation can be performed.

4 is a diagram illustrating a mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) according to an embodiment of the present invention.

Referring to FIG. 4, the mobile repeater / relay mode multifunction terminal 130 ′, a mobile RS or HR-MS acting as relay, includes a processor 132, a memory 134, and a radio frequency (RF) module 136. ). The processor 132 may be configured to implement the procedures and methods described above. The memory 134 is connected to the processor 132 and stores various information related to the operation of the processor 132. The RF module 136 is connected to the processor 132 and transmits or receives a radio signal. The mobile repeater / relay mode multifunction terminal 130 ′ (Mobile RS or HR-MS acting as relay) may have a single antenna or multiple antennas.

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 (14)

Selecting the terminal serving as a relay;
Receiving a first message including scanning interval information from an upper base station;
Transmitting a second message including the scanning interval information to a lower terminal receiving a service by establishing a temporary network by the terminal; And
And receiving wireless synchronization from the base station according to the scanning interval information. The method of claim 1,
And transmitting a third message requesting the scanning interval information to the higher base station. The method of claim 1,
The receiving of the first message may include receiving the first message from the upper base station when the terminal initially accesses the higher base station. 4. The method according to any one of claims 1 to 3,
And the first message and the second message include a field of the scan interval, a start superframe index field, a start frame index field, and an interleaving interval field. The method of claim 2,
The third message includes a scanning interval control field and a synchronization search interval control field. The method of claim 1,
The transmitting of the second message may include transmitting the second message to the lower terminal when receiving a scanning request message from the lower terminal. The method of claim 1,
The terminal is a communication method of the terminal operating in the TTR relay mode. If there is a problem with the base station, selecting the relay between the base station and the base station of the base station;
Receiving a first message including scanning interval information from the base station;
Transmitting a second message including the scanning interval information to the lower terminal; And
And receiving wireless synchronization from the base station according to the scanning interval information. 9. The method of claim 8,
And transmitting a message requesting the scanning interval information to the base station. 9. The method of claim 8,
Receiving the first message comprises receiving the first message from the base station when the repeater initially connects to the base station. 11. The method according to any one of claims 8 to 10,
And the first message and the second message include a field of the scan interval, a start superframe index field, a start frame index field, and an interleaving interval field. RF module; And
A process connected with the RF module,
When the process is selected as a terminal serving as a relay and receives scanning interval information from a higher base station, the process transmits a message including the scanning interval information to a lower terminal, and transmits a message including the scanning interval information from the higher base station according to the scanning interval information. Terminal for receiving wireless synchronization. The method of claim 12,
The process is a terminal for requesting the scanning interval information to the upper base station. The method according to claim 12 or 13,
The message includes a field of the scan interval, a start superframe index field, a start frame index field and an interleaving interval field.

Images