KR20130067901A - Method for allocating station indentifier in broadband wireless communication system - Google Patents

Abstract

PURPOSE: A terminal identifier assignment method in a wideband wireless communication system is provided to identify a terminal and M2M(Machine to Machine) devices. CONSTITUTION: A base station receives a terminal type from a terminal(S110). The base station assigns an identifier to identify the terminal within a type indicator to the terminal(S120). The base station configures a resource assignment map using the type indicator and the identifier(S140). The base station transmits the resource assignment map to the terminal(S150). [Reference numerals] (AA) Base station; (BB) Terminal; (S110) Transmit terminal types; (S120) Assign a type indicator and an identifier; (S130) Transmit the type indicator and the identifier; (S140) Configure A-MAP IE; (S150) Transmit the A-MAP IE; (S160) Transmit the A-MAP IE which is transmitted to a terminal; (S170) Analyze the A-MAP IE

Description

Method of allocating terminal identifier in broadband wireless communication system {METHOD FOR ALLOCATING STATION INDENTIFIER IN BROADBAND WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method for allocating a terminal identifier in a broadband wireless communication system, and more particularly, to a method for allocating a terminal identifier used for resource allocation for transmitting and receiving data to a terminal in a base station.

In a broadband wireless communication system, a base station assigns a terminal identifier (ID) to identify the terminal when the terminal performs a network registration procedure.

In an IEEE 802.16m-based broadband wireless communication system, a base station allocates a 12 bit STID (Station Identifier) to a terminal when the terminal performs a network registration procedure. The STID is a unique identifier for identifying each terminal in the base station.

In the IEEE 802.16m based broadband wireless communication system, the STID is used to identify resources allocated to each terminal. The base station informs the user equipment of radio resources through which downlink data is transmitted through DL Assignment Advanced-MAP (A-MAP) including downlink assignment information. In addition, in order for the terminal to transmit uplink data to the base station, an uplink resource must be allocated. For this purpose, the base station transmits a UL Assignment A-MAP (A-MAP) including uplink allocation information to the terminal.

The base station adds a 16-bit masked Cyclic Redundancy Check (CRC) to the end of each A-MAP information element (IE), which is generated using a 12-bit STID. Therefore, when all the terminals in the base station receives the A-MAP, it uses the STID to identify the MAP IE sent to it.

As such, the 12-bit STID is used by the base station to identify the terminal and transmit the A-MAP. However, the maximum number of terminals that can be identified using a 12-bit STID in one base station is 4096. IEEE 802.16p is a system that supports machine to machine (M2M) communication based on IEEE 802.16m. In a system supporting M2M, one base station may coexist with thousands or tens of thousands of machines and terminals. Therefore, it is not possible to identify them all using a 12-bit STID.

Currently, IEEE 802.16p proposes a method in which a plurality of devices share a single STID and position a frame for data transmission differently to solve the lack of STID. However, this method has a complexity of scheduling for data transmission. There is a problem to increase.

The technical problem to be solved by the present invention is to provide a terminal identifier allocation method for the base station can identify more M2M (Machine to Machine) devices and terminals in a broadband wireless communication system.

According to an embodiment of the present invention, a method for allocating a terminal identifier by a base station of a broadband wireless communication system is provided. The method of allocating a terminal identifier includes: receiving a terminal type from a terminal, allocating an identifier for identifying the terminal within the same type indicator as a type indicator according to the terminal type, to the terminal, using the type indicator and the identifier Configuring a resource allocation map (MAP), and transmitting the resource allocation map to the terminal.

According to an embodiment of the present invention, even if a large number of M2M terminals are installed in one base station by allocating an identifier for effectively identifying a non-M2M terminal and an M2M terminal in a broadband wireless communication system supporting M2M (Machine to Machine) This can be efficiently supported and the scheduling complexity of the base station can be reduced.

1 is a diagram schematically illustrating a method for allocating a terminal identifier in a broadband wireless communication system according to an exemplary embodiment of the present invention.
2 is a diagram illustrating a mask CRC according to an embodiment of the present invention.
3 is a diagram illustrating a network access procedure in a broadband wireless communication system according to an exemplary embodiment of the present invention.
FIG. 4 is a diagram schematically illustrating the AAI_RNG_RSP shown in FIG. 3.
FIG. 5 is a diagram schematically showing AAI_REG_REQ shown in FIG. 3.
FIG. 6 is a diagram schematically illustrating the AAI_REG_RSP shown in FIG. 3.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out 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 and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). , UE), an access terminal (AT), an advanced MS (AMS), and the like, and all or a part of functions of a terminal, a mobile terminal, a subscriber station, a portable subscriber station, a user device, and an access terminal. It may also include.

In the present specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), transmission and reception It may also refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, an advanced BS (AMS), and the like, and may include an access point, a wireless access station, a NodeB, an eNodeB, a transceiver base station, and an MMR-BS. It may also include all or part of the functionality.

Now, a method of allocating a terminal identifier in a broadband wireless communication system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating a method for allocating a terminal identifier in a broadband wireless communication system according to an exemplary embodiment of the present invention.

Referring to Figure 1, the terminal transmits its terminal type to the base station (S110).

The base station allocates an identifier for distinguishing the terminal from the same type indicator as the type indicator according to the terminal type (S120), and transmits the type indicator and the identifier to the terminal (S130). That is, the type indicator and the identifier are used as the terminal identifier. Here, the identifier may include a station identifier (STID) and a temporary STID (TSTID).

The base station configures an Advance-MAP Information Element (A-MAP IE) using a type indicator and an identifier (S140), and then transmits the A-MAP IE to the terminal (S150). Specifically, the base station adds a 16-bit masked Cyclic Redundancy Check (MCRC) to the last part of the A-MAP IE. The MCRC is obtained by performing an exclusive OR (XOR) operation on the 16-bit CRC and the 16-bit mask CRC calculated for the A-MAP IE.

When the terminal receives the A-MAP IE from the base station, the terminal identifies the A-MAP IE transmitted to itself using the type indicator and the identifier (S160).

The terminal may check resource allocation information by analyzing the A-MAP IE transmitted to the terminal (S170).

2 is a diagram illustrating a mask CRC according to an embodiment of the present invention.

Referring to FIG. 2, a 16-bit mask CRC includes a 1-bit masking prefix. The masking prefix distinguishes a 15 bit random access ID (RAID) from a dynamic or reserved identifier (ID).

If the masking prefix is 0, it indicates a dynamic or reserved ID. If the masking prefix is 1, it indicates RAID.

Dynamic or reserved IDs consist of a 3-bit type indicator and a 12-bit masking code. The 3-bit type indicator generally indicates the purpose of the masking code. For example, in IEEE 802.16m, the type indicator 0b000 indicates a case in which the masking code is a 12 bit STID or TSTID. The type indicator 0b001 indicates that the masking code is for broadcasting or ranging channel assignment A-MAP IE, BR-ACK Broadcasting or Ranging Channel Assignment A-MAP IE, or group ID. Group resource allocation A-MAP IE (Group Resource Allocation A-MAP IE). The type indicator 0b010 indicates that the masking code is an ID using a multicast assignment A-MAP IE.

According to an embodiment of the present invention, the 3-bit type indicator is additionally used to indicate the type of the terminal, and the STID is used to identify each terminal among the terminals of the same type. That is, when the type indicator is 0b000, it indicates a non-M2M terminal and the masking code indicates an STID assigned to the non-M2M terminal. If the type indicator is 0bkkk, it indicates a terminal performing a network access procedure and a masking code indicates a TSTID temporarily assigned to a terminal performing a network access procedure. And M2M terminal is fixed M2M (fixed M2M) terminal and non-fixed (non-fixed) M2M terminal, when the type indicator is 0bxxx indicates a fixed M2M terminal and the masking code indicates the STID assigned to the fixed M2M terminal, type If the indicator is 0byyy, it indicates an unfixed M2M terminal and the masking code indicates an STID assigned to the unfixed M2M terminal.

In this way, the base station uses a type indicator and an identifier (STID or TSTID) of the components of the 16-bit mask CRC to identify the terminal, and the terminal identifier consisting of the type indicator and the identifier is assigned to the terminal during the network connection process.

3 is a diagram illustrating a network access procedure in a broadband wireless communication system according to an exemplary embodiment of the present invention. 4 is a diagram schematically showing AAI_RNG_RSP shown in FIG. 3, FIG. 5 is a diagram schematically showing AAI_REG_REQ shown in FIG. 3, and FIG. 6 is a diagram schematically showing AAI_REG_RSP shown in FIG. 3.

Referring to FIG. 3, the terminal allocates an initial ranging code for identifying the terminal by the base station for initial ranging and transmits an initial ranging code to the base station (S302).

When the base station receives the initial ranging code from the terminal, it broadcasts the A-MAP IE (S304), and receives a ranging confirmation message (Advanced Air Interface Ranging Acknowledge, AAI_RNG_ACK) indicating whether to receive the initial ranging code to the terminal. It transmits (S306).

In addition, the base station transmits a CDMA Allocation A-MAP IE for transmitting a ranging request message (AAI Ranging Request, AAI_RNG_REQ) to the terminal (S308). At this time, the base station calculates a 16-bit CRC for the CDMA Allocation A-MAP IE, and calculates 16-bit MCRC by XOR operation of the 16-bit mask CRC configured by using the calculated 16-bit CRC and RAID. The 16-bit mask CRC consists of a 1-bit masking prefix and a 15-bit RAID. Thereafter, the base station adds and transmits the MCRC to the CDMA Allocation A-MAP IE.

The UE configures a 16-bit mask CRC using RAID for the received CDMA Allocation A-MAP IE, obtains a 16-bit CRC for the CDMA Allocation A-MAP IE, and then uses a 16-bit mask CRC and a 16-bit CRC. XOR operation If the UE compares the value obtained by XOR operation of the 16-bit CRC and the 16-bit CRC and the MCRC transmitted by being added to the CDMA Allocation A-MAP IE, the UE determines that the CDMA Allocation A-MAP IE is the MAP transmitted to the CDMA Allocation. Analyze A-MAP IE to check resource allocation information.

The terminal transmits AAI_RNG_REQ to the base station using the resource allocation information (S310).

When the base station receives AAI_RNG_REQ from the terminal, it transmits a CDMA Allocation A-MAP IE to the terminal to inform the resource allocation information for the transmission of a ranging response message (AAI Ranging Response, AAI_RNG_RSP) for the AAI_RNG_REQ (S312). Next, the base station allocates the TSTID of the terminal and transmits the terminal including the type indicator (0bkkk) associated with the TSTID and the TSTID in the AAI_RNG_RSP (S314). Referring to FIG. 4, AAI_RNG_RSP may include a TSTID field and a type indicator field. The TSTID field includes a 3-bit TSTID allocated to the UE, and the type indicator field includes a 15-bit type indicator (0bkkk) associated with the TSTID. Included.

Thereafter, the terminal performs a basic capability negotiation process with the base station. The UE performs a process of allocating a resource for transmission of an AAI Subscriber Station Basic Capability Request (AAI_SBC_REQ) for basic capability negotiation. To this end, the base station transmits an UL assignment map (UL Assignment A-MAP IE) to the terminal (S316). At this time, the base station calculates a 16-bit CRC for the UL Assignment A-MAP IE, XOR operation of the 16-bit mask CRC composed of the calculated 16-bit CRC and the TSTID and type indicator (0bkkk) assigned to the terminal 16 Compute the MCRC of the bit. The 16-bit mask CRC contains a 1-bit masking prefix, a 3-bit type indicator, and a 12-bit TSTID. Thereafter, the base station adds and transmits MCRC to UL Assignment A-MAP IE.

The UE determines whether the UL Assignment A-MAP IE is a MAP transmitted to it by using the TSTID and the type indicator (0bkkk), and if it is determined that the UL Assignment A-MAP IE is transmitted to the UE, the UL Assignment A-MAP IE is determined. Analyze the resource allocation information. At this time, the method of determining whether the UL Assignment A-MAP IE is a MAP transmitted to the terminal is similar to the method of determining whether the CDMA Allocation A-MAP IE is the MAP transmitted to the terminal. That is, the terminal configures a 16-bit mask CRC using the TSTID and the type indicator (0bkkk) assigned to the terminal, obtains a 16-bit CRC for the UL Assignment A-MAP IE, and then 16-bit mask CRC and 16-bit. XOR the CRC of. The UE may determine that the UL Assignment A-MAP IE is the MAP assigned to the UE if the value obtained by comparing the XOR operation is the same as the MCRC transmitted by being added to the UL Assignment A-MAP IE.

The terminal transmits AAI_SBC_REQ to the base station using the resource allocation information (S318).

The base station transmits a DL Assignment A-MAP IE for transmitting the AAA Subscriber Station Basic Capability Response (AAA_SBC_RSP) to the UE. At this time, the base station calculates the MCRC using the 16-bit mask CRC composed of the TSTID and the type indicator (0bkkk) and transmits it to the DL Assignment A-MAP IE in the same manner as described above.

Next, the base station transmits AAA_SBC_RSP to the terminal using the resource allocation information of the DL Assignment A-MAP IE (S320).

After the basic capability negotiation process between the terminal and the base station is completed through this process, the terminal performs a registration process. The registration process is a process that enables the base station to manage the terminal.

First, the terminal 100 performs a process of receiving a resource allocation for transmission of a registration request message (AAI Registration Request, AAI_REG_REQ) to the base station (S324). The process of allocating a resource for transmitting AAI_REG_REQ is the same as the process of allocating a resource for transmitting an AAI_SBC_REQ message.

When the UE receives the UL Assignment A-MAP IE from the base station (S324), it is determined whether the UL Assignment A-MAP IE is a MAP transmitted to it by using the UL Assignment A-MAP IE, and the UL Assignment A- transmitted to the UE. If it is determined that the MAP IE, the UL Assignment A-MAP IE is analyzed to confirm resource allocation information.

The terminal transmits AAI_REG_REQ to the terminal using the resource allocation information (S326). At this time, the terminal includes its terminal type in AAI_REG_REQ and transmits it to the terminal. Referring to FIG. 5, AAI_REG_REQ may include a terminal type field, and the terminal type field includes a terminal type indicating whether the terminal is a non-M2M terminal or a fixed M2M terminal or a non-fixed M2M terminal.

The base station transmits a DL Assignment A-MAP IE for transmitting a registration response message (AAI Registration Response, AAI_REG_RSP) for the AAI_REG_REQ to the terminal (S328), the base station is the TSTID and type indicator (0bkkk) in the same manner as described above. MCRC is calculated using 16-bit mask CRC composed of) and added to DL Assignment A-MAP IE for transmission.

The base station allocates the type indicator and the STID according to the terminal type included in the AAI_REG_REQ, and transmits the type indicator (0byyy) and the STID to the terminal in the AAI_REG_RSP (S330). Referring to FIG. 6, AAI_REG_RSP may include an STID field and a type indicator field. The STID field includes a 3-bit STID allocated to the terminal, and the type indicator field includes a 15-bit type indicator (0bkkk) associated with the STID. Included.

Thereafter, the base station transmits a resource allocation map (UL / DL Assignment A-MAP IE) for transmitting and receiving data to the terminal (S332). The base station includes a 1-bit masking prefix, a 3-bit type indicator (0byyy), and a 12-bit STID. MCRC is calculated using a 16-bit mask CRC, and then added to UL / DL Assignment A-MAP IE and transmitted to the UE.

Then, when the UE receives the UL / DL Assignment A-MAP IE, the UL / DL Assignment A- uses a 16-bit mask CRC including a 1-bit masking prefix, a 3-bit type indicator (0byyy), and a 12-bit STID. The MAP IE determines whether the MAP is transmitted to the MAP IE, and then performs data transmission and reception with the base station (S334).

As such, the base station uses a type indicator and STID (or TSTID) according to the terminal type as a terminal identifier for identifying a resource allocated to each terminal, so that the number of terminals including the M2M terminal in one base station is thousands or tens of thousands. In this case, they can be effectively identified.

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 (1)

In a method of allocating a terminal identifier by a base station of a broadband wireless communication system,
Receiving a terminal type from a terminal,
Allocating an identifier for identifying the terminal within the same type indicator as the type indicator to the terminal according to the terminal type;
Constructing a resource allocation map (MAP) using the type indicator and the identifier, and
Transmitting the resource allocation map to the terminal.
Terminal identifier assignment method comprising a.

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