KR101660752B1 - Method and apparatus of updating for additional system information transfering through broadcast message in a broadband wireless communication system - Google Patents

Abstract

The present invention relates to a method and an apparatus for updating additional system information transmitted through a broadcast message, and an additional system information updating method according to the present invention is a method for updating additional system information through a superframe including a superframe header (SFH) (ABI) update method of a broadband wireless access system for transmitting and receiving ABI information, comprising the steps of: receiving ABI configuration information including ABI transmission information and change information and at least one ABI from a base station, Receiving through a frame; Comparing the previously stored ABI change information with the received ABI change information to determine whether the ABI change is made; And decoding and updating the changed ABI with reference to the ABI transmission information or the ABI change information when the ABI change occurs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a system and method for updating additional system information transmitted through a broadcast message in a broadband wireless communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to system information updating in a broadband wireless communication system, and relates to a method and apparatus for updating additional system information (ABI) transmitted through a broadcast message.

In the broadband wireless communication system, system information necessary for communication must be transmitted from the base station to the terminal for communication between the base station and the terminal. The BS may transmit system information necessary for communication with the MS through a super frame header (SFH), and may transmit additional system information through a separate broadcast message.

Additional broadcast information (ABI) required for communication between the BS and the UE includes an extended system parameter, system configuration information, and downlink notification And the like.

Such additional system information is delivered to the terminal through a traffic channel in the form of an additional broadcast message.

Meanwhile, the UE continuously checks whether the supplementary system information (ABI) transmitted through the broadcast message is updated as well as the essential system information transmitted through the SFH in order to continuously communicate with the base station, Lt; RTI ID = 0.0 > and / or < / RTI >

However, even if the system information is not changed, if the terminal decodes and updates the system information every time, unnecessary power consumption of the terminal is caused. In particular, when the UE is in a sleep mode or an idle mode, the UE decodes and updates the system information transmitted through the SFH and the broadcast message even if the system information is not changed. It acts as an inefficient operation in terms of power consumption.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a configuration information transmission method and an additional system information update method and apparatus for updating additional system information.

According to an aspect of the present invention, there is provided a method for updating additional system information, the method comprising: receiving a data stream from a superframe including a superframe header (SFH) The method comprising: receiving ABI configuration information including transmission information and change information of an ABI from a base station and at least one ABI through the superframe; Comparing the previously stored ABI change information with the received ABI change information to determine whether the ABI change is made; And decoding and updating the changed ABI with reference to the ABI transmission information or the ABI change information when the ABI change occurs.

Preferably, the ABI transmission information included in the ABI configuration information includes ABI scheduling information indicating a type of an ABI transmitted in the super frame, and an ABI indicating a transmission frame or a subframe position of the ABI transmitted in the super frame. And ABI change information included in the ABI configuration information includes an ABI change counter for incrementing a counter value according to a change of the ABI and an ABI change bitmap indicating a type of the changed ABI. .

Preferably, the superframe header includes a first superframe header including change information of essential system information, and a second superframe header including essential system information.

In addition, the first super frame header or the second super frame header further includes the ABI configuration information.

In addition, the ABI change information is included in the first super frame header, and the ABI transmission information is received in the second super frame header.

In addition, the ABI is configured with at least one ABI type according to a transmission period, the second super frame header is configured with at least one or more subpackets according to a transmission period of the system information, And are received through the subpackets of the second super frame in which the transmission periods coincide with each other.

Preferably, the ABI is configured with at least one ABI type according to a transmission period, and the ABI change information includes an ABI change bitmap having at least one bit indicating a change state of each of the ABI types, And the ABI decoding and updating step comprises decoding and updating the ABI type of the corresponding position when the bit of the specific position of the ABI change bitmap is toggled or when the bit of the specific position indicates the bit value 1 .

According to another aspect of the present invention, there is provided a method for updating additional system information in a broadband wireless access system for transmitting / receiving data through a superframe including a superframe header (SFH) A method for updating an additional system information (ABI), comprising: receiving ABI configuration information including an ABI change counter and a change bitmap from a base station and at least one ABI through the super frame; Comparing the pre-stored ABI change counter with the ABI change counter included in the ABI configuration information to determine whether the ABI change is made; And decoding and applying the changed ABI of the received ABI with reference to the ABI change bitmap when the ABI change is determined as a result of the determination.

Advantageously, the ABI is received in the form of a broadcast message over a traffic channel.

Preferably, the ABI configuration information includes ABI transmission indication information indicating whether an ABI is transmitted in the super frame, ABI scheduling information indicating a type of an ABI transmitted in the super frame, and ABI And ABI transmission time information indicating a transmission frame or a subframe position of the transmission frame.

Preferably, the ABI is a handover, a multiple input multiple output (MIMO), a relay, a multi-carrier, a femtocell, a multicast and a broadcast service (MBS) -RAT and neighboring base station related information, and the ABI is configured with at least one ABI type classified according to a transmission period.

Preferably, the ABI is composed of at least one ABI type classified according to a transmission period, the ABI change bitmap is composed of at least one bit indicating the changed state of each ABI type, and the ABI decoding and updating step When the bit of the specific position of the ABI change bitmap is toggled or when the bit of the specific position is the bit value 1, the ABI type of the corresponding position is decoded and updated.

According to another aspect of the present invention, there is provided a method for updating additional system information, comprising the steps of: receiving a first super frame header (P-SFH) and a second super frame header (S-SFH) (S-SFH) change counter (Chang Count) and a subpacket (SubPacket) change bit of a S-SFH from a base station in a system information update method of a broadband wireless access system that transmits and receives data through a superframe Receiving a P-SFH information element (IE) including a Change Bitmap through the superframe; Comparing the pre-stored S-SFH change counter with the received S-SFH change counter to determine whether to change the S-SFH sub-packet information element; If the S-SFH subpacket information element has changed, decode the changed S-SFH subpacket information element with reference to the subpacket change bitmap and apply the changed system information; And decoding and applying the ABI received through the superframe when the changed S-SFH subpacket includes transmission information for additional system information (ABI).

According to an aspect of the present invention, there is provided an apparatus for updating an additional system information, the apparatus comprising: a superframe including a first superframe header (P-SFH) and a second superframe header (S-SFH) A system of a broadband wireless access system for transmitting and receiving data through a superframe, the system comprising: a receiver for receiving a superframe including essential system information and additional system information (ABI) from a base station; A P-SFH information element (IE) including a S-SFH scheduling information bitmap, an S-SFH change counter and an S-SFH subpacket change bitmap in the received super frame, A decoder for decoding the at least one S-SFH subpacket information element and the ABI including the essential system information; A memory in which a change counter and a subpacket change bitmap of the S-SFH, an ABI change counter, and an ABI change bitmap are stored; And a change counter and a change bitmap of the received S-SFH stored in the memory to control a decoding and updating operation of the S-SFH subpacket, And a controller for controlling the decoding and updating operations of the ABI by comparing the ABI change counter and the change bitmap with the change counter and the change bit map of the received ABI.

Advantageously, the controller compares the ABI change counter stored in the memory with the received ABI change counter and does not decode the ABI if there is no difference between the two values, and if the difference between the two values occurs, And controls to decode and update the changed ABI by comparing the bitmap with the received subpacket change bitmap.

According to the present invention, even when additional system information is changed, control / setting information for applying additional system information is transmitted through a superframe header, so that control / setting information for applying the changed system information is transmitted to a separate signaling procedure It is possible to effectively inform the mobile station without using the mobile station.

Also, there is an effect that an operation method and apparatus for preventing additional system information decoding operations unnecessary for a terminal, and power consumption due to the same, and for updating additional system information more efficiently are provided.

1 is a diagram schematically showing a frame structure of a high level.
2 is a diagram schematically showing a frame structure of the FDD scheme.
3 is a diagram schematically showing a frame structure of the TDD scheme.
4 is a flowchart sequentially illustrating a process of detecting an information error in a P-SFH received from a base station according to an embodiment of the present invention.
FIG. 5 is a diagram illustrating an embodiment in which ABI-related information is transmitted through a P-SFH.
FIG. 6 is a diagram illustrating an embodiment in which relevant information for ABI update is transferred through a P-SFH.
FIG. 7 is a diagram illustrating an embodiment in which ABI-related information is transmitted through a specified S-SFH.
FIG. 8 is a diagram illustrating an embodiment in which relevant information for ABI update is transmitted through a specified S-SFH.
FIG. 9 is a diagram illustrating an embodiment in which ABI-related information is transmitted through different S-SFH subpackets.
FIG. 10 is a diagram illustrating an embodiment in which relevant information for ABI update is transmitted through different S-SFH subpackets.
11 is a diagram illustrating an embodiment in which ABI-related information is transmitted through P-SFH and S-SFH.
FIG. 12 shows an embodiment in which relevant information for ABI update is transmitted through P-SFH and S-SFH.
FIG. 13 is a diagram illustrating an embodiment in which ABI-related information is transmitted through an S-SFH subpacket mapped to a corresponding transmission period according to an ABI type.
FIG. 14 is a flowchart sequentially illustrating an ABI update operation with reference to ABI configuration information transmitted through an S-SFH according to an embodiment of the present invention.
15 is a flowchart sequentially illustrating a process of performing an ABI update operation with reference to ABI configuration information transmitted through an S-SFH according to another embodiment of the present invention.
16 is a block diagram schematically showing the configuration of an apparatus for performing an ABI update operation according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or similar elements throughout the several views, and redundant description thereof will be omitted. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It is to be noted that the accompanying drawings are only for the purpose of facilitating understanding of the present invention, and should not be construed as limiting the scope of the present invention with reference to the accompanying drawings.

The communication system of the present invention includes a base station and a terminal as a system for providing various communication services such as voice and packet data and the like.

The terminal of the present invention may be called a subscriber station (SS), a user equipment (UE), a mobile equipment (ME), a mobile station Such as a portable device or a PC, or a vehicle-mounted device.

The base station of the present invention is a fixed point for communicating with a terminal and may be used as a base station (BS), an evolved NodeB (eNB), a base transceiver system (BTS), and an access point. One or more cells may exist in one base station and an interface for transmitting user traffic or control traffic may be used between the base stations. Also, a downlink means a communication channel from a base station to a terminal, and an uplink means a communication channel from a terminal to a base station.

The multiple access scheme applied to the wireless communication system of the present invention can be applied to various wireless communication systems such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Single Carrier- Frequency Division Multiple Access) or other modulation techniques known in the art.

In addition, the multiple access scheme for downlink and uplink transmission may be different from each other. For example, an OFDMA scheme may be used for the downlink and an SC-FDMA scheme may be used for the uplink.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. The description will be omitted.

1 is a diagram schematically showing a frame structure of a high level.

As shown in the figure, the frame structure applied to the system of the present invention may be a basic element of a frame of 5 ms, and the frame may be defined as a basic unit of transmission as an interval between preambles. The frame includes at least one subframe and may include a plurality of Transmission Time Intervals (TTIs) having different sizes. The TTI is a basic unit of scheduling performed in the MAC (Medium Access Control) layer, and the TTI can be referred to as a radio resource allocation unit.

In addition, a super frame including a plurality of frames is configured, and the super frame may be configured in units of 20 ms, for example. When configuring a super frame, system configuration information and broadcasting information for initial fast cell selection and low latency service are set as a transmission unit, and generally, 2 to 6 frames are allocated to one It consists of super frame. Also, each 5 ms frame is composed of a plurality of sub-frames, and each sub-frame is composed of a plurality of OFDM / OFDMA symbols. Each superframe includes one superframe header (SFH) including a broadcast channel, and SFH is located in the first subframe of the corresponding superframe.

The frame structure may be designed to have a specific frame structure according to the bandwidth of the system channel, the duplex scheme, and the CP (Cyclic Prefix) length.

2 is a diagram schematically showing a frame structure of a Frequency Division Duplex (FDD) scheme.

In the FDD mode, downlink and uplink transmissions are classified in the frequency domain, and all subframes in each frame are both downlink and uplink transmissions. The UE in the FDD mode can access the uplink subframe and simultaneously receive the data burst in an arbitrary downlink subframe.

As shown in FIG. 2, a super frame of 20 ms includes four 5 ms frames (F0, F1, F2, F3), one frame F2 includes eight subframes SF0, SF1, SF2, SF3, SF4, SF5, SF6, and SF7) and an idle time period of 62.86 mu s. Each subframe may be composed of seven OFDM symbols S0, S1, S2, S3, S4, S5, and S6.

3 is a diagram schematically showing a frame structure of a TDD (Time Division Duplex) scheme.

In the TDD mode, downlink and uplink transmissions are classified in the time domain, and uplink transmission time periods are allocated after the downlink transmission time periods, whereby data is transmitted and received through the downlink and uplink.

3, a 20-ms super frame includes four 5-ms frames (F0, F1, F2 and F3), one frame F2 includes eight sub-frames SF0, SF1, SF2, SF3, SF4, SF5, SF6, and SF7) and an idle time period of 62.86 mu s. The frame F2 is composed of consecutive D downlink frames and consecutive U uplink frames determined according to the ratio of DL to UL (D: U), and the ratio of DL to UL is 5: 3 The five subframes SF0, SF1, SF2, SF3, and SF4 are configured as downlink frames and the three subframes SF5, SF6, and SF7 are configured as uplink frames. An idle symbol for distinguishing DL and UL is inserted between the last downlink subframe SF4 and the first uplink subframe SF5 to inform that it is switched from DL to UL. The gap inserted between the downlink and the uplink is referred to as a TTG (transmit transition gap), and the gap inserted between the uplink and the downlink is referred to as a RTG (receive transition gap) And uplink transmission.

The last DL subframe SF4 is composed of five OFDM symbols and the last one Idle symbol S5. The Idle symbol S5 has a role of a transmit / receive transition gap (TTG) .

Hereinafter, the SFH will be described in detail.

In a broadband wireless access system, a super frame header (SFH) transmits system information necessary for communication with a base station to terminals. SFH is located in the first subframe in one superframe, as described with reference to FIG. The SFH can be divided into a primary SFH (P-SFH) to which control information for receiving the SFH is transmitted and an S-SFH (secondary SFH) to which essential control information such as a network entry is transmitted.

The S-SFH can be divided into a plurality of subpackets (hereinafter, referred to as 'SP') according to the type or transmission frequency of system information to be transmitted, and can be divided into three SPs (SP1, SP2, SP3) .

The P-SFH is transmitted every superframe, and includes 4-bit-LSB information indicating the super frame number and information related to the S-SFH. Information related to the S-SFH includes 'S-SFH change count' indicating the currently transmitted S-SFH version, 'S-SFH Scheduling information bitmap' indicating whether or not the S-SFH is transmitted in the corresponding super frame, S-SFH size 'indicating the number of LRUs allocated for transmission,' S-SFH number of repetitions' indicating the transmission format of the S-SFH, 'S-SFH number' SP change bitmap ". The sizes of the 'S-SFH Scheduling information bitmap' and 'S-SFH SP change bitmap' fields are the same as the total number of SPs of the S-SFH.

The S-SFH transmits actual system information and the transmitted system information is divided into three subpackets according to their characteristics, and each of them is referred to as S-SFH SPn (n = 1, 2, 3) . Each of the S-SFH SP information elements (IEs) has different transmission periods, the transmission period of _SP1 is TSP1, the transmission period of _SP2 is _TSP2 , and the transmission period of _SP3 is _TSP3 The transmission period of the subpacket of _TSP < _TSP < _TSP2 < _TSP3 , for example.

Also, the UE must detect an information error in the P-SFH received from the base station before updating the system information transmitted from the base station.

4 is a flowchart sequentially illustrating a process of detecting an information error in a P-SFH received from a base station according to an embodiment of the present invention.

The P-SFH includes a 4-bit LSB super frame number, an S-SFH change count (CC), an S-SFH scheduling information bitmap, an S- , 'S-SFH number of repetitions', 'S-SFH SP change bitmap' (hereinafter referred to as CB), and CRC (Cyclic Redundancy Check) for error detection.

In general, the UE calculates the CRC value based on the received data to check whether there is an error in the information in the P-SFH transmitted through the air interface. Based on the CRC value thus calculated, the UE determines whether an error has occurred in the information in the P-SFH.

The present invention proposes a process of additionally determining whether an error has occurred using the 4-bit-LSB super frame number field in the P-SFH even when it is determined that no error occurs in the general P-SFH error detection procedure through the CRC do.

First, the terminal decodes the received P-SFH (S401).

The CRC value included in the P-SFH is decoded to primarily determine whether an error has occurred in the information in the P-SFH (S403).

If it is determined that an error has occurred via the CRC check, an error is detected as an error in the corresponding super frame (S417). If it is determined that no error has occurred, an essential network entry (initial network entry) The terminal itself successfully calculates the super frame number.

Accordingly, in step S405, the base station compares the superframe number in the P-SFH transmitted by the base station with the superframe number calculated by the base station, and determines whether the P-SFH has been correctly transmitted without error in step S405.

The terminal, which has determined that an error has occurred in the information in the P-SFH, may not take any action by processing an error in the corresponding super frame (S417).

If it is determined that the superframe number in the P-SFH transmitted by the base station is the same as the superframe number comparison result calculated by the base station, the corresponding superframe is determined as no error (S407).

If the S-SFH is transmitted in the corresponding superframe, the UE can calculate the CRC for the S-SFH, and if the UE determines that the information in the S-SFH is error free, the UE can perform a normal operation in the corresponding superframe.

Meanwhile, the base station transmits additional broadcast information (ABI), which is additionally required for communication with the terminals, to the terminal in the form of an additional broadcast message. At this time, the additional broadcast message can be transmitted through AAI_SCD, AAI_SII-ADV, AAI_RNG-ACK, AAI_TRF-IND, AAI_NBR-ADV, AAI_PAG-ADV, AAI_DL_IM, and PGID_info messages according to the ABI type to be transmitted. And can be transmitted through a traffic channel through which general user data is transmitted.

The ABI includes extended system parameters and control information for system configuration information and DL notification. These control information are necessary information after system acquisition. More specifically, as shown in Table 1, the control information includes information for handover, information related to Multiple Input Multiple Output (MIMO), relay information, multi-carrier information, (FemtoCell) related information, multicast and broadcast service (MBS) related information, inter-RAT related information between heterogeneous networks, neighbor advertisement related information, and the like.

Information description Information for handover Default HO RSSI and CINR averaging parameter, Hysteresis margin, Time-to-Trigger duration, Trigger information Information for MIMO Codebook subset for PMI coordination, Codebook subset for DL MU-MIMO subset indication Information for Relay Hop information, DL / UL allocation, Transmit / receive zone, Zone type Information for Multi-Carrier Carrier index, Fully / Partially configured carrier indication, Center frequency, Bandwidth information, Initial access ability, Guard resource information Information for FemtoCell - Information for E-MBS Service ID, MSCCH resource allocation information Information for inter-RAT MIH capability support Information for neighbor advertisement characteristics of neighbor BS network notifications Control and signaling information may be transmitted in the network to a single user or a group of users in the idle mode and sleep mode

Hereinafter, a configuration information transmission method for updating the additional system information and an additional system information update method using the same will be described below.

The base station must transmit to the UE an ABI transmission indicator, ABI transmission scheduling information, information indicating the ABI transmission time, and various control information indicating whether the ABI is changed, in order to inform the UE whether the ABI is changed or transmitted.

The ABI transmission indication information is information indicating whether or not the ABI is transmitted in the superframe transmitted from the base station, and is represented by 1 bit. Hereinafter, the ABI transmission indication information is referred to as 'AI' in the related drawings and description.

The ABI transmission scheduling information is information indicating which type of ABI is transmitted in the superframe transmitted from the base station, and may be a predetermined value capable of representing a plurality of ABI types or a bit map bitmap &lt; / RTI &gt;

According to an embodiment of the present invention, the system information (NBR-ADV) for neighboring base stations of ABI includes type 1, type 2 information indicating inter-RAT related information indicating MIH capability support, type 3 information related to MBS, Additional information (SCD) of the base station receiving the paging information can be defined as type 4 and paging related information can be defined as type 5, respectively. If the AI field is present, the ABI transmission scheduling information may be included only when the ABI is transmitted in the corresponding super frame. In the following drawings and description, the ABI transmission scheduling information is referred to as 'ASI'.

The information indicating the timing of transmission of the ABI is information indicating the position of the frame or subframe in which the ABI types are transmitted within the corresponding superframe.

At this time, if each ABI type is transmitted in a different frame or subframe, the base station may notify only the transmission position of the first ABI type transmitted in the corresponding superframe. If there is a 1 bit AI field, the ABI transmission time information may be included only when the ABI is transmitted in the corresponding super frame. Also, if the scheduling information field is present, the ABI transmission time information may be included only when the ABI is transmitted in the corresponding super frame. Hereinafter, the ABI transmission time information is referred to as 'ASP' (ABI Start Position) in the related drawings and description.

The ABI change information indicating whether the ABI is changed may be an ABI change counter in which the counter value increases according to the ABI change according to an embodiment of the present invention (the first embodiment). The ABI change counter (ACC) indicates common version information for all ABI types, and can be incremented by 1 each time the ABI is changed as shown in Equation (1).

&Quot; (1) &quot;

ABI change count = (ABI change count + 1) modulo N (N = 2 ^{size of ABI change} count)

The ABI change bitmap indicating whether or not each type of change is toggled is made by toggling the value of the bit position of the ABI change bitmap (ACB) corresponding to the changed ABI type at the time of increment of the ABI change counter, The position value can be set to 1. For example, when inter-RAT information corresponding to ABI type 2 is changed, the value of the second bit of the ABI change bitmap corresponding to ABI type 2 is toggled or the value of the second bit is changed If the E-MBS information corresponding to the ABI type 3 is changed, the value of the third bit of the ABI change bitmap corresponding to the ABI type 3 is toggled, or the value of the third bit is set to the bit Value "1 &quot;.

According to a modified embodiment (second embodiment) of the present invention, the ABI change count indicating the ABI change count may exist for each ABI type. The base station increments the ABI change count corresponding to the corresponding type by 1 each time information of the corresponding type is changed.

According to another embodiment (third embodiment) of the present invention, the ABI change information indicating the ABI change can be applied in combination with the first embodiment or the second embodiment described above according to the ABI type. For example, system information for neighboring base stations, additional information of a base station currently receiving service, and MBS information may be changed according to the second embodiment so that the ABI Change Count exists independently for each ABI type, And the paging information such as the PGID information may indicate whether the ABI is changed according to the first embodiment.

At least one or more pieces of configuration information for the ABI update may be transmitted through the P-SFH and / or the S-SFH. When using the S-SFH, these pieces of information may be delivered only through a specific S-SFH SP, or may be transferred flexibly through another S-SFH SP.

Hereinafter, various embodiments of the configuration information transmission method for ABI update will be described in detail with reference to related drawings.

5 is a diagram illustrating an embodiment in which ABI configuration information is transmitted through P-SFH and S-SFH.

5, the ABI configuration information is basically transmitted to the UE through the P-SFH. In the superframe where the ABI is transmitted, information related to the ABI transmission is transmitted to the UE through the S-SFH.

Referring to FIG. 5, since the ABI is not transmitted in the first superframe, ACC, ACB, and AI are transmitted through the P-SFH, and ABI-related information is not transmitted through the S-SFH. At this time, it is assumed that AI is transmitted with being set to "0", the ABI change counter (ACC) is set to 12, and the ABI change bitmap is set to "000".

In the second superframe, since the ABI is transmitted through the second frame (10) and the fourth frame (20) of superframe 2, the base station transmits the ABI-related information ACC, ACB and AI through the P-SFH, The AI field is set to "1 " to indicate that the ABI is transmitted through the second super frame. The ASI, which is the ABI transmission scheduling information, and the ASP, which is transmission time information of the ABI, are transmitted through the S-SFH. In this case, ASI means the ABI type (s) transmitted in the second superframe, and ASP means the frame number in which the ABI is transmitted first in the second superframe.

As shown in FIG. 5, the ASI is set to "101" to indicate that the ABI type 1 and the type 3 are transmitted and the ASP is set to "2" .

If the ABI sent over Superframe 2 is an updated ABI, then the ACC of Superframe 2 is incremented to indicate the change in ABI. Advantageously, a change in the ASI and ASP fields carried over the S-SFH may not affect the CC increase, so that the terminal does not make unnecessary S-SFH updates. This is because the ASI and the ASP are information that is necessary only for the UE to receive the ABI and unnecessary information for the UE that has already received the ABI.

FIG. 6 is a diagram illustrating an embodiment in which configuration information for ABI update is transmitted through a P-SFH. As shown, ACC changes from 12 to 13 (103) since the ABI has changed in Superframe 2 so that the changed bitmap ACB of the changed ABI is changed to indicate that ABI Type 1 (10) and Type 3 (20) are changed Quot; 101 " At this time, as described above, by keeping the CC at 25, the change of the ASI and ASP fields transmitted through the S-SFH can be prevented from affecting the CC increase. The ASI and ASP transmitted through the S-SFH of the superframe 2 indicate the type of the ABI transmitted in the corresponding super frame and the frame number in which the corresponding ABI is transmitted. As shown in the figure, the ASI is set to " 101 "to indicate that the ABI type 1 (10) and the type 3 (20) are transmitted and the ASP is set to" 2 " 2 "

FIG. 7 is a diagram illustrating an embodiment in which ABI-related information is transmitted through a specified S-SFH.

In this embodiment, the ABI related information ACC, ACB, AI, ASI and ASP are transmitted through the specified S-SFH in the superframe.

In the first superframe, since the ABI is not transmitted, the base station transmits only ACC, ACB, and AI (0) through the S-SFH. On the other hand, in the second superframe, since the ABI is transmitted through the second frame (10) and the fourth frame (20), the base station transmits the ASI and the ASP together with the ACC, ACB, and AI .

In this case, ASI means the type of ABI transmitted in superframe 2, and ASP has a value of 2 because it means the frame number at which the ABI is transmitted first in superframe 2.

In the case where the updated ABI is transmitted in the embodiment of FIG. 7, as shown in FIG. 8, since the ACC in the S-SFH in the superframe 2 has been changed, CC is changed from 25 to 26 (101) The ACC is changed from 12 to 13 (103). ACB, ASI, and ASP transmitted through the S-SFH of the superframe 2 indicate the type of the changed ABI, the ABI transmission scheduling information, and the frame number to which the ABI is transmitted. As shown in the figure, , The ABI type 1 (10) and the type 3 (20) are changed, indicating that both are transmitted in the corresponding super frame, and the ASP is set to "2 " 2 &lt; / RTI &gt;

FIG. 9 is a diagram illustrating an embodiment in which ABI-related information is transmitted through different S-SFH subpackets.

The base station transmits ABI configuration information such as ACC, ACB, and ASI through an S-SFH subpacket (SP) transmitted immediately following the P-SFH. At this time, the corresponding information is transmitted at the beginning or the end of the S-SFH SP. However, according to the modified embodiment of the present invention, instead of always transmitting the ASI field, the ASI field may be transmitted only when the AI is transmitted and the AI has a value of '1'.

In the first superframe, the ABI configuration information is transmitted through the S-SFH SP1 transmitted immediately after the P-SFH, and the ABI is not transmitted in the corresponding superframe because the ASI is all 0. [ In the second superframe, the ABI configuration information is transmitted via the P-SFH and the S-SFH SP2 immediately transmitted. In the third superframe, the S-SFH is not transmitted, so no ABI configuration information is transmitted.

When the updated ABI is transmitted in the embodiment of FIG. 9, the CC is changed from 25 to 26 (101) since the ACC in the S-SFH is changed in the superframe 2 as shown in FIG. 10, The ACC is changed from 12 to 13 (103). The ACB, ASI, and ASP transmitted through the S-SFH SP2 of the superframe 2 indicate the type of the changed ABI, the ABI transmission scheduling information, and the frame number to which the ABI is transmitted. As shown, ACB and ASI are set to "101 " to indicate that ABI type 1 (10) and type 3 (20) are changed and both are transmitted in the corresponding superframe, and ASP is set to" 2 " So that the frame number to which the ABI is first transmitted is 2.

11 is a diagram showing another embodiment in which ABI-related information is transmitted through different S-SFH subpackets.

The base station transmits the ABI configuration information ACC, ACB and ASI through the P-SFH. In the superframe in which the ABI is not transmitted, there is no information to be transmitted through the S-SFH in the superframe in which the ABI is not transmitted. And delivers the ASP indicating the frame number to which the ABI is delivered through the S-SFH subpacket (SP) immediately following the SFH. At this time, the ASP is transmitted at the beginning or the end of the S-SFH SP. In the first superframe, the ABI configuration information is transmitted only through P-SFH, since the ABI is not transmitted. In the second superframe, the ABI is delivered so that the ASP is delivered via the P-SFH and the S-SFH SP2 immediately transmitted. In the third superframe, the ABI configuration information is transmitted only through the P-SFH, since the ABI is not transmitted.

When the updated ABI is transmitted in the embodiment of FIG. 11, since the ABI is changed in the superframe 2 as shown in FIG. 12, the ACC transferred from the P-SFH is changed from 12 to 13 (103). The ACB and ASI transmitted through the P-SFH are set to "101 " to indicate that the ABI type 1 (10) and the type 3 (20) are changed and both of them are transmitted in the corresponding super frame. The ASP transmitted through the S-SFH SP2 of the superframe 2 represents the frame number to which the ABI is transmitted. As shown in the figure, the ASP is set to "2" Lt; / RTI &gt;

FIG. 13 is a diagram illustrating an embodiment in which ABI-related information is transmitted through an S-SFH subpacket mapped to a corresponding transmission period according to an ABI type.

For example, the ABI configuration information for MBS information transmitted non-periodically may be transmitted using a scheme as shown in FIG. 9 or 11, and a periodically transmitted MIMO, Relay, Multi-Carrier, The ABI configuration information for an advertisement, etc., can be transmitted in a specific S-SFH SP whose period matches.

As described above, the S-SFH can be divided into a plurality of subpackets (SP) according to the transmission frequency of the transmitted system information, and each S-SFH SP information element (IE) can have different transmission periods.

In the present embodiment, it is assumed that the S-SFH SPs are composed of three SPs (SP1, SP2, SP3), and that the ABI configuration information is included in a specific S-SFH SP having the same period . At this time, the corresponding information may be included in the first or last S-SFH SP.

Table 2 shows examples of transmission periods of S-SFH SPs and ABI types.

S-SFH SP Cycle ABI type Cycle SP 1 100ms  MIMO 100ms SP 2 200ms  Relay, Multi-Carrier 400ms SP 3 300ms  inter-RAT, neighbor advertisement 600ms

As shown in Table 2, since the period of the MIMO information coincides with the period of the S-SFH SP 1, the ABI configuration information for the MIMO information can be transmitted through the S-SFH SP 1.

Also, since the period of the Relay and Multi-Carrier information coincides with a multiple of the period of the S-SFH SP 2, the ABI configuration information for the Relay and Multi-Carrier information can be transmitted through the S-SFH SP 2.

Also, since the period of the inter-RAT and the neighbor advertisement information coincides with a multiple of the period of the S-SFH SP 3, the ABI configuration information for the inter-RAT and neighbor advertisement information can be transmitted through the S-SFH SP 3.

FIG. 13 illustrates an embodiment in which ABI configuration information is transmitted through different S-SFH SPs according to the periodicity of each ABI type based on Table 2.

In FIG. 13, both S-SFH SP 1 and MIMO information are transmitted every 100 ms, and since S-SFH SP 1 always transmits only configuration information for MIMO information, ACB and ASI can be omitted in S-SFH SP1 have. Therefore, as shown in the figure, SP 1 includes ACC and ASP for MIMO information.

Also, since the S-SFH SP2 is transmitted every 200 ms and the relay and multi-carrier information are transmitted every 400 ms, the ACB and ASI in the S-SFH SP2 can be composed of 2 bits. Therefore, as shown in the figure, SP 2 includes ACC, ACB, ASI, and ASP for Relay and Multi-Carrier information.

Also, since the S-SFH SP 3 is transmitted every 300 ms and the inter-RAT and neighbor advertisement information are transmitted every 600 ms, the ACB and ASI in the S-SFH SP 3 can be composed of 2 bits. Therefore, as shown in the figure, the SP 3 includes ACC, ACB, ASI, and ASP for inter-RAT and neighbor advertisement information.

Hereinafter, a method of updating an ABI of a terminal receiving system change information will be described.

FIG. 14 is a diagram sequentially illustrating an ABI updating process according to the first embodiment of the present invention.

The base station includes a P-SFH IE including an S-SFH scheduling information bitmap SI, an S-SFH change counter CC and an S-SFH subpacket SP change bitmap (S-SFH SP CB) To the terminal. At this time, the ABI configuration information may be transmitted through the P-SFH or the S-SFH. When the ABI configuration information is transmitted through the P-SFH, the ACC and ACB included in the P-SFH IE are checked without checking the change of the CC, and it is determined whether the ABI is changed and the decoding and updating operations can be performed have. However, when the ABI configuration information (ACC, ACB) is transmitted through the S-SFH, since the CC is changed when the ABI configuration information (ACC) included in the S-SFH IE is changed, Before making a decision, you should first determine whether the CC has changed.

In the embodiment described with reference to FIG. 14, the ABI update process is performed when the ABI configuration information (ACC, ACB) is transmitted via the S-SFH.

Upon receiving the P-SFH IE from the base station, the UE decodes the received P-SFH IE (S1401).

Thereafter, the UE compares the previously received S-SFH CC value with the newly received S-SFH CC value (S 1403).

As a result of the comparison of the CC values, when there is no difference between the two values (CC difference = 0), it means that not only the system information of the S-SFH but also the ABI configuration information in the S-SFH are not changed. And decodes all S-SFH IEs and ABIs (S 1405).

If the difference between the two values has occurred (CC difference ≠ 0), the UE compares the previously received S-SFH CB with the newly received S-SFH CB or if the bit value is equal to 1 The bit position of CB is confirmed (S1407).

As a result of the CB check, it is determined that the S-SFH SP IE corresponding to the toggled bit position or the S-SFH SP IE corresponding to the position where the bit value is 1 is changed, and the corresponding SP IE is decoded and updated (S1411), and stores the changed S-SFH CC value and S-SFH SP CB value.

At this time, if the P-SFH or the S-SFH SP received by the UE includes the ABI configuration information, the previously stored ACC value is compared with the currently received ACC value (S1413).

As a result of the comparison of the ACC values, if there is no difference between the two values (ACC difference = 0), it means that the ABI configuration information is not changed, so that the terminal determines that there is no change and omits decoding of the ABI (S1417) .

As a result of the comparison of the ACC values, if there is a difference between the two values (ACC difference ≠ 0), the corresponding changed ABI type is decoded and updated (S1419).

At this time, the ABI type decoding and updating operation compares the previously stored ACB with the received ACB and determines that the ABI type corresponding to the toggled bit position has changed or the ABI type of the bit position of the ACB corresponding to the bit value of 1 And performs decoding and updating operations on the corresponding ABI type.

Thereafter, the ACC value and the ACB value of the changed ABI are stored.

FIG. 15 is a diagram sequentially illustrating the ABI update process according to the second embodiment of the present invention.

In this embodiment, when ABI configuration information (AI or ASI) excluding ACC and ACB is transmitted through the S-SFH, the ABI update of the terminal is performed based on this information.

In the first embodiment, which has been described with reference to FIG. 14, it is determined whether the ABI is updated through the ACC (S1413). However, since ACC is not transmitted in this embodiment, whether or not the AI or ASI is received, (S1513).

That is, when the S-SFH SP including the ABI configuration information is received and the ABI is transmitted in the corresponding superframe, the UE decodes and updates the ABI unconditionally regardless of the change.

However, when the ABI is not transmitted in the corresponding superframe, the ASI or AI will have a value of "0 ", and in such a case, the ABI decoding and updating operation is not required.

Also, the present invention proposes a method in which UEs can know in advance before receiving an ABI for transmitting system information on an enhanced multicast broadcast service (multiple RF carriers, location based service, etc.) of a base station.

16 is a block diagram schematically illustrating a configuration of a UE performing a system information update operation according to an embodiment of the present invention.

The terminal includes a transmitter 1601, a receiver 1603, a decoder 1605, a memory 1607, and a controller 1609.

The receiver 1601 receives a superframe including essential system information and additional system information (ABI) from the base station. The superframe header includes a S-SFH change counter and a subpacket change bitmap indicating the change of the system information and a change information application indication message indicating the application time of the changed system information.

The decoder 1605 decodes the P-SFH including the S-SFH scheduling information bitmap, the S-SFH change counter, and the S-SFH subpacket change bitmap in the received super frame. At least one S-SFH subpacket information element including the information element (IE) and essential system information and the ABI are decoded.

In the memory 1607, a S-SFH change counter and a subpacket change bitmap, an ABI change counter, and an ABI change bitmap are stored.

The controller 1609 controls the decoding and updating operation of the S-SFH subpacket by comparing the change counter and the change bitmap of the S-SFH stored in the memory 1607 with the change counter and the change bitmap of the received S-SFH And compares the ABI change counter and the change bitmap stored in the memory with the change counter and the change bit map of the received ABI to control the decoding and updating operations of the ABI.

The ABI change counter stored in the memory and the received ABI change counter are compared with each other. When there is no difference between the two values, the ABI change bit counter is not decoded. And controls to decode and update the changed ABI.

If the base station to which the user wants to use some of these additional services (MBS, etc.) does not support the corresponding service (s), the base station will move to another base station. However, according to the related art, after the physical / DL synchronization and the reception of the ABI are completed, the terminal can know whether the corresponding base station supports these additional services. Therefore, the service delay and the DL / UL signaling overhead (ranging, registration, etc.) are generated.

In order to solve this problem, the base station must inform the UEs through the S-SFH whether each of the additional support services (s) is supported. If the BS recognizes that the BS does not support the desired service, the MS can directly move to another BS without performing a process (ranging, registration, ABI reception, etc.) performed during the network entry process.

The apparatus according to the present invention can be applied to various types of apparatuses such as an output device (display, speaker, etc.), an input device (keypad, microphone, etc.) Reception section (RF module, antenna, etc.). These components are obvious to those skilled in the art, and detailed description thereof will be omitted.

Meanwhile, the method according to the present invention described up to now can be implemented by software, hardware, or a combination thereof. For example, a method in accordance with the present invention may be stored in a storage medium (e.g., mobile terminal internal memory, flash memory, hard disk, etc.) &Lt; / RTI &gt; in a software program that can be executed by a computer.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the scope of the present invention . Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (5)

Generating a frame including first header information and second header information; And
And transmitting the generated frame, wherein the generated frame includes at least one or more sub-frames,
Wherein the first header information includes information related to the second header information, the second header information includes control information, and the frame further includes additional system information. The method according to claim 1,
Wherein the first header information further includes size information of the second header information and repetition information of the second header information. The method of claim 1, further comprising encoding the first header information and the second header information. Receiving a frame, the frame including first header information and second header information, the first header information including information related to the second header information, and the second header information including control information Wherein the frame further comprises additional system information, the frame comprising at least one or more subframes;
Decoding the first header information; And
Decoding the second header information using the decoded first header information; And
And obtaining the additional system information to update the additional system information. 5. The method of claim 4,
Wherein the first header information further includes size information of the second header information and repetition information of the second header information.

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