JP2012520003A - Bandwidth request preamble sequence selection method and random access method - Google Patents

Abstract

The present invention discloses a method for selecting a bandwidth request preamble sequence for bandwidth request in a wireless connection system and a random access method using the same. The present invention also discloses an apparatus for supporting the random access scheme. In one embodiment of the present invention, a method for performing random access in a wireless access system includes: receiving a first message including a bandwidth request index that has been set from a base station; Selecting a bandwidth request preamble sequence from an already set bandwidth request index based on characteristics of link data; and transmitting a second message including the already set bandwidth request index to the base station; Transmitting the selected bandwidth request preamble sequence to the base station.
[Selection] Figure 5

Description

  The present invention relates to a method for selecting a bandwidth request code (BR code) for bandwidth request in a wireless connection system, a random access method, and an apparatus for supporting the method.

  FIG. 1 is a diagram illustrating an uplink resource allocation procedure of a terminal using a contention based request method.

  Referring to FIG. 1, the UE transmits a randomly selected CDMA code to a randomly selected slot from a region allocated for bandwidth request in the uplink (S110).

  When the base station recognizes the CDMA code sent from the terminal, the base station uses the CDMA allocation information element (CDMA_Allocation_IE) to allocate resources for the terminal to transmit the bandwidth request message (S120).

  The terminal that has received information on the uplink resource for transmission of the bandwidth request message transmits the bandwidth request message to the corresponding resource region. At this time, the UE can use a bandwidth request header (BR header), and the header includes information on the size of the requested bandwidth (S130).

  If the bandwidth requested by the terminal is available, the base station allocates uplink resources to the terminal (S140).

  The terminal transmits data to the allocated uplink resource (S150).

  In a broadband wireless access system, a mobile terminal that wants to perform a 3-step random access process transmits a high-speed connection message including a BR preamble sequence and uplink bandwidth request information (eg, station identifier (Station ID), BR request size). Must be transmitted to the base station.

  At this time, the base station that has not successfully received the high-speed connection message cannot acquire information on the mobile terminal. That is, a situation may arise where the base station is requested to allocate bandwidth but does not know how much bandwidth to which mobile terminal must be allocated. Therefore, regardless of whether the base station successfully decodes the high-speed connection message, the base station needs to obtain significant information.

  For this, the mobile terminal needs to select a BR preamble sequence according to a certain rule using the uplink bandwidth request information. That is, it is desirable that the base station that has detected only the BR preamble sequence can identify the mobile terminal only by decoding the BR preamble sequence.

  Further, the base station needs to know whether or not the mobile terminal has transmitted a high-speed connection message. If the base station does not know at all whether or not the mobile terminal has transmitted the high speed connection message, the mobile terminal does not transmit the high speed connection message. There is an overhead that all the radio channels must be decoded.

  Furthermore, when the base station misrecognizes that the high-speed connection message has been normally decoded, the base station may allocate uplink radio resources to the mobile terminal that has not requested it. In order to prevent such a malfunction of the base station, the BR preamble sequence is preferably used separately in a 3-step random access process and a 5-step random access process.

  The present invention has been devised to solve the above-described general technical problems, and an object of the present invention is to provide a method for a mobile terminal to efficiently perform a random access method. is there.

  Another object of the present invention is to provide a method for selecting a random access code in accordance with a random access scheme to be performed by a mobile terminal.

  Still another object of the present invention is to provide various methods for supporting a random access scheme performed by a mobile terminal.

  Still another object of the present invention is to provide a mobile terminal and a network device for solving the above-described problems of the present invention.

  The technical problem to be achieved in the present invention is not limited to the matters mentioned above, and other technical problems not mentioned can be derived from the embodiments of the present invention described below from the embodiments of the present invention. It will be clear to those with ordinary knowledge in the field.

  The present invention discloses a method for selecting a bandwidth request code (BR code) for requesting bandwidth in a wireless access system, a random access method, and an apparatus supporting the same.

  As a first embodiment of the present invention, a method for performing random access in a wireless access system includes a step of receiving a first message including an already set bandwidth request index from a base station, and an uplink transmitted by a mobile terminal. Selecting a bandwidth request preamble sequence from an already set bandwidth request index based on data characteristics, and transmitting a second message including the already set bandwidth request index to the base station; Transmitting the selected bandwidth request preamble sequence to the base station.

  Here, the characteristics of the uplink data may be one or more of a service type, a priority order, a scheduling type, and a bandwidth request size associated with the uplink data. In addition, the already set bandwidth request index may include a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information. Here, the already set bandwidth request index may be set based on the characteristics of the uplink data.

  In the first embodiment of the present invention, the step of selecting the bandwidth request preamble sequence includes the step of the mobile terminal selecting a bandwidth request preamble sequence set index based on uplink data characteristics, and the bandwidth request preamble sequence. Selecting a bandwidth request preamble sequence from the aggregate index.

  The first embodiment of the present invention includes a step of receiving an acknowledgment message indicating that the bandwidth request preamble sequence has been normally received from the base station, and transmitting uplink data or bandwidth from the base station. Receiving a map message including information on radio resources allocated for transmission of the request header.

  In the first embodiment of the present invention, a reception confirmation message indicating whether or not a bandwidth request preamble sequence has been successfully received is received from a base station, and the reception confirmation message includes a bandwidth request preamble sequence. If the reception is failed, the method may further include retransmitting the bandwidth request preamble sequence to the base station.

  In addition, when the mobile terminal performs a three-step random access process, the mobile terminal may transmit a high-speed connection message including a station identifier for identifying the mobile terminal at the stage of transmitting the bandwidth request preamble sequence. it can.

  At this time, the mobile terminal can receive a reception confirmation message indicating the reception status of the bandwidth request preamble sequence and the high-speed connection message from the base station. If the reception confirmation message indicates that the bandwidth request preamble sequence has been successfully received, but the high-speed connection message has not been received normally, the mobile terminal receives the uplink data from the base station. A map message including information on radio resources allocated for transmission or transmission of a bandwidth request header can be received.

  Accordingly, the mobile terminal can transmit uplink data or a bandwidth request header to the base station through the allocated radio resource area.

  If the acknowledgment message indicates that both the bandwidth request preamble sequence and the high speed connection message are not successfully received, the mobile terminal retransmits the bandwidth request preamble sequence and the high speed connection message to the base station. be able to.

  In the first embodiment of the present invention, the first message is a dynamic service addition request (DSA-REQ) message or a dynamic service change request (DSC) when the base station initiates a request for a dynamic service. -REQ) message, and when the mobile terminal initiates a request for dynamic service, either a dynamic service addition response (DSA-RSP) message or a dynamic service change response (DSA-RSP) message Good. The second message is either a dynamic service addition response (DSA-RSP) message or a dynamic service change response (DSC-RSP) message when the base station starts a request for dynamic service, When the terminal starts a request for a dynamic service, either a dynamic service addition request message or a dynamic service change request message may be used.

  As a second embodiment of the present invention, a mobile terminal performing random access in a wireless connection system includes a transmission module for transmitting a radio signal, a reception module for receiving a radio signal, and a processor for controlling random access. Can be included.

  Here, the processor receives the first message including the already set bandwidth request index from the base station and the already set bandwidth request based on the characteristics of the uplink data transmitted by the mobile terminal. Selecting a bandwidth request preamble sequence with an index; transmitting a second message including an already set bandwidth request index to the base station; and transmitting the selected bandwidth request preamble sequence to the base station. And can be controlled.

  In the second embodiment of the present invention, the characteristics of the uplink data may indicate one or more of a service type, a priority order, a scheduling type, and a bandwidth request size associated with the uplink data. Here, the already set bandwidth request index may include a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information.

  The processor further comprises: a mobile terminal selects the bandwidth request preamble sequence set index based on uplink data characteristics; and a bandwidth request preamble sequence is selected from the bandwidth request preamble sequence set index. It can be carried out.

  The above-described first and second embodiments of the present invention are only a part of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be applied to various fields in the art. Those of ordinary skill in the art will be able to derive and understand from the detailed description of the invention set forth below.

  According to the embodiment of the present invention, the following effects can be obtained.

  First, a mobile terminal can efficiently perform random access to a base station using a 3-step or 5-step random access scheme.

  Second, it is possible to use a clear method in which a mobile terminal selects a random access code according to a random access scheme.

  Third, the random access scheme can be efficiently performed by supporting the random access scheme performed by the mobile terminal using the DSx process.

  The effects obtained from the embodiments of the present invention are not limited to the effects mentioned above, and other effects not mentioned in the following description of the embodiments of the present invention are based on the technical field to which the present invention belongs. It will be clearly derived and understood by those with ordinary knowledge. That is, unintended effects associated with the implementation of the present invention may be derived from the embodiments of the present invention by those who have ordinary knowledge in the technical field.

It is a figure which shows the uplink resource allocation procedure of the terminal using a contention based request | requirement system. It is a figure which shows an example of the bandwidth request | requirement process of a 3 step random access base. It is a figure which shows an example of the bandwidth request | requirement process of a 5-step random access base as an alternative system at the time of 3 steps failure. It is a figure which shows an example of one bandwidth request | requirement channel structure. FIG. 5 is a diagram illustrating one method for selecting a BR preamble sequence using a station identifier according to an embodiment of the present invention. FIG. 10 is a diagram illustrating one method of determining a BR preamble index using a DSx process according to an embodiment of the present invention. It is another Example of this invention, Comprising: It is a figure which shows an example of a 3 step random access system. It is another Example of this invention, Comprising: It is a figure which shows the other example of a 3 step random access system. It is another Example of this invention, Comprising: It is a figure which shows the other example of a 3 step random access system. It is another Example of this invention, Comprising: It is a figure which shows the further another example of a 3 step random access system. It is a further embodiment of the present invention and is a diagram showing an example of a 5-step random access method. It is a figure which is another Example of this invention, and is a figure which shows the other example of a 5-step random access system. FIG. 13 is a diagram illustrating a mobile terminal and a base station according to still another embodiment of the present invention, in which the embodiment of the present invention described with reference to FIGS. 2 to 12 can be performed.

  Embodiments of the present invention disclose a method for selecting a bandwidth request code (BR code) for requesting bandwidth in a wireless access system, a random access method, and an apparatus supporting the same.

  The following embodiment is a combination of components and features of the present invention in a predetermined form. Each component or feature can be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form that is not combined with other components or features. Also, some embodiments and / or features may be combined to form an embodiment of the present invention. The order of operations described in the embodiments of the present invention can be changed. Some configurations and features of one embodiment may be included in other embodiments, and may replace corresponding configurations or features of other embodiments.

  In the description of the drawings, procedures or steps that obscure the gist of the present invention are not described, and descriptions of procedures or steps that can be understood by those skilled in the art are omitted.

  In the present specification, the embodiments of the present invention have been described centering on the data transmission / reception relationship between the base station and the mobile station. Here, the base station has the meaning of a terminal node (terminal node) of the network that communicates directly with the mobile station. The specific operations described in this document as being performed by a base station may be performed by an upper node of the base station in some cases.

  That is, various operations performed for communication with a mobile station in a network including a number of network nodes including a base station can be performed by the base station or another network node other than the base station. . Here, 'base station' may be replaced with terms such as fixed station, Node B, eNode B (eNB), advanced base station (Advanced Base Station), or access point (Access Point). is there.

  In addition, a “mobile station (MS)” includes a UE (User Equipment), an SS (Successor Station), an MSS (Mobile Subscriber Station), a mobile terminal (Mobile Terminal), and an evolved mobile terminal (AMS: Mobile Ed). A term such as “Station” or “Terminal” can be substituted.

  The transmitting end means a fixed and / or mobile node that provides a data service or a voice service, and the receiving end means a fixed and / or mobile node that receives a data service or a voice service. Therefore, in the uplink, the mobile station may be the transmitting end and the base station may be the receiving end. Similarly, in the downlink, the mobile station may be the receiving end and the base station may be the transmitting end.

  An embodiment of the present invention is an IEEE 802. xx can be supported by standard documents disclosed in at least one of 3GPP system, 3GPP LTE system and 3GPP2 system. In other words, in the embodiments of the present invention, the obvious steps or parts that are not described may be supported by the above document.

  In addition, any terms disclosed in this document can be explained by the above standard documents. In particular, embodiments of the present invention are supported by one or more of the IEEE 802.16 system standard documents P802.16e-2004, P802.16e-2005 and P802.16 Rev2 and P802.16m standard documents. That's fine.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The detailed description disclosed below in connection with the appended drawings is intended as a description of exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

  In addition, specific terms used in the embodiments of the present invention are provided to assist the understanding of the present invention, and the use of such specific terms is not limited to the scope of the technical idea of the present invention. The form can be changed. For example, the bandwidth request preamble sequence used in the embodiment of the present invention is also called a bandwidth request code (BR code).

  FIG. 2 is a diagram illustrating an example of a bandwidth request process based on a 3-step random access.

  In a broadband wireless access system, a mobile terminal can use a 3-step or 5-step random access scheme. The 5-step random access method can be used independently of the 3-step random access method, and can be used as an alternative method (Fall-Back Mode) at the time of failure of the 3-step method.

  A mobile terminal (AMS: Advanced Mobile Station) uses a bandwidth request preamble sequence (Bandwidth Request preamble sequence) and a high-speed connection message (Quick Access Message) at an arbitrarily selected opportunity to serve as a serving base station (S-ABS: S-ABS). The data is transmitted to the Advanced Base Station (S210).

  Here, the high-speed connection message may include a station identifier (Station ID), which is uplink bandwidth request information, a bandwidth request size, a BR index indicating QoS, and the like.

  The base station can transmit the BR ACK A-MAP information element indicating the reception status for the BR preamble sequence and the high-speed connection message transmitted by each mobile terminal to the mobile terminal in the form of broadcast / multicast (S220).

  Also, the base station that has successfully received the BR preamble sequence and the high-speed connection message allocates uplink resources to each mobile terminal, and assigns uplink resource allocation information to the UL basic allocation A-MAP information element (UL basic assignment A- It is transmitted to each mobile terminal through MAP IE) (S230).

  The mobile terminal can transmit uplink data to the base station through the allocated uplink transmission region. At this time, the mobile terminal can transmit additional uplink bandwidth request information to the base station together (S240).

  FIG. 3 is a diagram illustrating an example of a bandwidth request process based on a 5-step random access base as an alternative method at the time of a 3-step failure.

  The mobile terminal transmits a BR preamble sequence (or BR code) and a high-speed connection message including uplink bandwidth request information (Station ID), a bandwidth request size and a BR index indicating QoS to the base station. (S310).

  The base station can transmit the reception status for the BR preamble sequence and the high-speed connection message transmitted by each mobile terminal to the mobile terminal through the BR ACK A-MAP information element. However, the case where the BR preamble sequence is normally decoded but an error occurs in the high-speed connection message will be taken up. Therefore, the BR ACK A-MAP information element indicates that the BR preamble sequence is normally received and the high-speed connection message is an error (S320).

  The base station that has successfully received only the BR preamble sequence transmitted by the mobile terminal transmits an uplink resource for transmitting a bandwidth request (BW-REQ) message by the mobile terminal to a CDMA allocation A-MAP information element (CDMA Allocation). Allocate to mobile terminals through A-MAP IE) (S330).

  In step S330, the CDMA A-MAP information element may be transmitted to the UE in the form of a grant for independent BR.

  The mobile terminal transmits a BW-REQ message (eg, independent BR header format) to the base station through the allocated area (S340).

  The base station that has received the BW-REQ message transmitted by the mobile terminal transmits an uplink resource, an uplink basic assignment A-MAP information element (UL basic assignment A-MAP IE), or a grant message for uplink data transmission. And assigned to the mobile terminal (S350).

  The mobile terminal transmits UL data to the base station through the allocated uplink resource region. At this time, the mobile terminal may transmit additional uplink bandwidth request information together with the base station (S360).

  FIG. 3 shows a 5-step random access method as an alternative method in the failure of the 3-step random access method of FIG. However, the general 5-step method may be performed using the step described in FIG. 3 as it is, except that the mobile terminal does not transmit the high-speed connection message in step S310.

  FIG. 4 is a diagram illustrating an example of one bandwidth request channel structure.

  Referring to FIG. 4, one BR channel is composed of three tiles. Here, one tile is composed of six OFDM symbols on the time axis and six consecutive subcarriers on the frequency axis. Therefore, the BR preamble sequences Pr0 to Pr23 are repeatedly transmitted in each tile, and the high speed connection messages M0 to M35 are transmitted over three tiles.

(Bandwidth Request Preamble Sequence Selection Method I)
Hereinafter, a method for selecting a bandwidth request preamble sequence will be described as an embodiment of the present invention.

  The BR preamble sequence used by the mobile terminal for the random access scheme can be classified according to a quality of service key parameter (QoS key parameter). Here, when the mobile terminal requests uplink resources, the QoS key parameter indicates the presence or absence of the request and characteristics of data to be transmitted. The QoS key parameter may include a service type, a priority, a scheduling type, and the like.

  In the exemplary embodiment of the present invention, the total k BR preamble sequences may be classified into one or more BR preamble sequence sets according to their purposes. At this time, information regarding each BR preamble sequence set is defined in advance and may be known by the mobile terminal and the base station.

  Alternatively, information on the BR preamble sequence set may be signaled from the base station at or without a request from the mobile terminal. In this case, information on the BR preamble sequence set may be transmitted together with an uplink request related parameter transmitted through a super frame header (SFH).

  At this time, the uplink request related parameters include information on a position where the bandwidth request channel is allocated, information on a bandwidth request backoff start point used in a back-off algorithm, and bandwidth request back. Information about the end point of off may be included.

  At this time, a predetermined number of BR preamble sequences may be basically allocated to each BR preamble sequence set, and may be additionally allocated according to a specific purpose. The number of BR preamble sequences included in each BR preamble sequence set can be known in advance by the mobile terminal and the base station.

  Of course, the base station may inform the mobile terminal of the number of BR preamble sequences through signaling between the mobile terminal and the base station. In this case, since the number of BR preamble sequences included in the last BR preamble sequence set can be implicitly grasped in the base station, the base station does not have to perform another signaling indicating the number for the last set. If there is a change in an existing allocated BR preamble sequence set, the base station can inform the mobile terminal of information related to the change through explicit signaling.

  The mobile terminal can first select a BR preamble sequence set based on the characteristics of the uplink data that it intends to transmit. Next, the mobile terminal can select an arbitrary BR preamble sequence from the selected BR preamble sequence set.

  Table 1 below shows an example of a set of BR preamble sequences classified by scheduling type.

無線接続システムで提供するスケジューリングサービスは、非要請グラントサービス（ＵＧＳ：Ｕｎｓｏｌｉｃｉｔｅｄ ｇｒａｎｔ ｓｅｒｖｉｃｅ）、実時間ポーリングサービス（ｒｔＰＳ：Ｒｅａｌ−ｔｉｍｅ ｐｏｌｌｉｎｇ ｓｅｒｖｉｃｅ）、拡張実時間ポーリングサービス（ｅｒｔＰＳ：ｅｘｔｅｎｄｅｄ ｒｔＰＳ）、非実時間ポーリングサービス（ｎｒｔＰＳ：Ｎｏｎ−ｒｅａｌ−ｔｉｍｅ ｐｏｌｌｉｎｇ ｓｅｒｖｉｃｅ）、最善型サービス（ＢＥ：Ｂｅｓｔ Ｅｆｆｏｒｔ ｓｅｒｖｉｃｅ）及び適応的グラントポーリングサービス（ａＧＰＳ：ａｄａｐｔｉｖｅ Ｇｒａｎｔ Ｐｏｌｌｉｎｇ Ｓｅｒｖｉｃｅ）がある。

Scheduling services provided by the wireless access system include unsolicited grant service (UGS), real-time polling service (rtPS), extended real-time polling service (ertPS: extended rtPS), and non-realistic polling service. There are non-real-time polling services (nrtPS), best-effort services (BE), and adaptive grant polling services (aGPS).

  Referring to Table 1, BR preamble sequence set 0 is allocated for UGS and may include 0-9 BR preamble sequences, BR preamble sequence set 1 is allocated for rtPS, and 10-19 BR preamble sequence set 2 is allocated for ertPS and includes 20 to 29 BR preamble sequences, BR preamble sequence set 3 is allocated for nrtPS and BE, 30 to 39 BR preamble sequences can be included, and the BR preamble sequence set 4 is allocated for aGPS and can include 40 to 49 BR preamble sequences.

  Here, the unsolicited grant service (UGS) increases the real time for transmitting periodic and fixed size data packets such as VoIP (Voice of IP) where T1 / E1 and silence suppression techniques are not applied. It was devised to support the link service flow.

  Real-time polling service (rtPS) was devised to support real-time uplink service flows for transmitting periodic and variable-sized data packets such as video professional group (MPEG) video. Is.

  The extended real-time polling service (ertPS) is a scheduling mechanism devised for the efficiency of UGS and rtPS2.

  The non-real-time polling service (nrtPS) provides a unicast poll for ensuring an uplink service flow reception request opportunity even in a situation where the network is congested. That is, it is a service that supports a non-real-time service flow for generating variable-size data packets.

  Best service (BE) refers to a scheduling type for providing efficient service for best traffic on the uplink.

  Adaptive Grant Polling Service (aGPS) refers to a set of one or more QoS parameters that can be defined during the initial service negotiation process.

  Table 2 below shows an example of a BR preamble sequence classified by service type and priority.

表２を参照すると、ＢＲプリアンブルシーケンス集合を、サービスタイプが遅延敏感サービス（Ｄｅｌａｙ Ｓｅｎｓｉｔｉｖｅ Ｓｅｒｖｉｃｅ）であるか、または、遅延耐性サービス（Ｄｅｌａｙ Ｔｏｌｅｒａｎｔ Ｓｅｒｖｉｃｅ）であるかによって分類し、なお、優先順位の高低によって分類することができる。

Referring to Table 2, the BR preamble sequence set is classified according to whether the service type is a delay sensitive service (Delay Sensitive Service) or a delay tolerant service (Delay Tolerant Service). Can be classified by.

  Table 3 below shows another example of a set of BR preamble sequences classified by service type and priority.

表３で、ＢＲプリアンブルシーケンス集合０、１、２、３は、ＬＳＢ ２ビットがそれぞれ００、０１、１０、１１から始まる全てのＢＲプリアンブルシーケンスを表す。

In Table 3, BR preamble sequence sets 0, 1, 2, and 3 represent all BR preamble sequences whose LSB 2 bits start from 00, 01, 10, and 11, respectively.

  Table 4 below shows an example of a set of BR preamble sequences classified by service type, priority, and bandwidth requirement size.

表４のＢＲプリアンブルシーケンス集合０、１、２、３、４、５は、ＬＳＢ ３ビットがそれぞれ０００、１００、００１、１０１、０１０、１１０から始まる全てのＢＲプリアンブルシーケンスを表す。

The BR preamble sequence sets 0, 1, 2, 3, 4, and 5 in Table 4 represent all BR preamble sequences whose LSB 3 bits start from 000, 100, 001, 101, 010, and 110, respectively.

  Table 5 below shows another example of a set of BR preamble sequences classified according to service type, priority, and bandwidth requirement size.

表５で、ＢＲ大きさは、バーストインデックスと定義できる。表５で、ＢＲプリアンブルシーケンスパターンは、ＬＳＢ ４ビットを用いて表示されたもので、移動端末は、サービスタイプ、優先順位及びＢＲ大きさによって分類されたＢＲプリアンブルシーケンスパターンを選択することができる。

In Table 5, the BR size can be defined as a burst index. In Table 5, the BR preamble sequence pattern is displayed using LSB 4 bits, and the mobile terminal can select a BR preamble sequence pattern classified according to service type, priority, and BR size.

  Table 6 below is defined in consideration of the total size of the VoIP packet by the codec used in the mobile terminal and the base station.

表６は、移動端末及び基地局で使用するコーデックの種類によるＶｏＩＰパケットの大きさを表したものである。ＢＲ大きさは、一般に多く使用されるコーデックＡＭＲ、Ｇ．７２９のみを考慮して定義することができる。例えば、ＢＲプリアンブルシーケンスの特定２ビット値が０ｂ００であれば、ＶｏＩＰパケットの大きさがバーストインデックス９（１６ｂｙｔｅ）と定義され、０ｂ０１はバーストインデックス１４（２９ｂｙｔｅ）と、０ｂ１０はバーストインデックス１７（４２ｂｙｔｅ）と、０ｂ１１はバーストインデックス２１（７１ｂｙｔｅ）と定義できる。

Table 6 shows the size of the VoIP packet depending on the type of codec used in the mobile terminal and the base station. The BR size is the codec AMR, G. 729 can be defined considering only 729. For example, if the specific 2-bit value of the BR preamble sequence is 0b00, the size of the VoIP packet is defined as burst index 9 (16 bytes), 0b01 is burst index 14 (29 bytes), and 0b10 is burst index 17 (42 bytes). 0b11 can be defined as a burst index 21 (71 bytes).

  The mobile terminal selects a BR preamble sequence set classified according to the BR preamble sequence mapping rule as described in Table 1 to Table 6, selects an arbitrary BR preamble sequence from the selected BR preamble sequence set, and performs a random access process. It can be performed. At this time, the BR preamble sequence mapping rules described in Tables 1 to 6 (for example, what QoS key parameters are used) and / or mapping information (for example, BR preamble sequence set index and / or BR preamble sequence number, etc.) ) Can be known as a value already set in the mobile terminal and the base station, or can be notified to the mobile terminal by signaling (for example, SFH transmission or DSx processing) in the base station.

(Bandwidth Request Preamble Sequence Selection Method II)
The mobile terminal can select a BR preamble sequence using information (eg, station identifier (STID)) included in the high-speed connection message other than the QoS key parameter.

  FIGS. 5a and 5b are diagrams illustrating a method for selecting a BR preamble sequence using a station identifier according to an embodiment of the present invention.

  Referring to FIG. 5a, the mobile terminal can select a BR preamble sequence using a part of the LSB or MSB of the station identifier (STID), and the mobile terminal can select a specific position (for example, the fifth position) of a predefined bit. Or the ninth) can be used to select a BR preamble sequence.

  For example, the mobile terminal can select the BR preamble sequence using the LSB 2 bits of STID. Referring to FIG. 5, if the 10th and 11th bit values of STID are 00, the terminal selects a BR preamble sequence (eg, x00xx) in which the nth and n + 1th bit values are 00. If the 10th and 11th bit values of STID are 01, the terminal selects a BR preamble sequence (for example, x01xx) whose nth and n + 1th bit values are 01. If the 10th and 11th bit values of STID are 10, the terminal selects a BR preamble sequence (eg, x10xx) in which the nth and n + 1th bit values are 10. If the 10th and 11th bit values of the STID are 11, the terminal selects a BR preamble sequence (for example, x11xx) in which the nth and n + 1th bit values are 11. At this time, how many bits of STID are used may be known in advance by the mobile terminal and the base station, or may be signaled by the base station.

  Also, the terminal can select a BR preamble sequence according to a bit position value determined by a calculated value based on an index value of an arbitrarily selected BR opportunity.

Position 0 (position 0) = m modulo STID length Position p = {(position n−1 + offset) modulo STID length} (p> 0)
The BR opportunity index m is indexed according to the allocation order (time axis) of BR channels (that is, BR opportunities) in one frame. At this time, the condition of offset ≧ 1 is satisfied. Also, the offset value may be predefined and may be signaled by the base station using SFH or other broadcast messages.

  FIG. 5b shows a method in which the mobile terminal selects a BR preamble sequence according to the index value of the BR opportunity. Referring to FIG. 5b, it is assumed that the mobile terminal selects the BR opportunity index 4, the offset is 1, and STID 2 bits are used.

  In this case, position 0 is 4 modulo 12 = 4, and position 1 is 4 + 1 modulo 12 = 5. Therefore, if the 4th and 5th bit values of STID are '00', the mobile terminal selects a BR preamble sequence (eg, x00xx) whose nth and n + 1th bit values are 00, and '01' If so, the mobile terminal selects a BR preamble sequence (for example, x01xx) in which the nth and n + 1th bit values are 01, and if it is '10', the terminal has an nth and n + 1th bit value of 10 A BR preamble sequence (e.g., x10xx) is selected. If the 4th and 5th bit values of STID are '11', the terminal selects a BR preamble sequence (eg, x11xx) in which the nth and n + 1th bit values are 11.

In addition, the mobile terminal uses the BR preamble according to a value obtained by performing a modulo operation on its own STID with the total number (k _n ) of BR preamble sequences assigned to the set corresponding to the characteristics of the uplink data to be transmitted. A sequence can be selected.

For example, the mobile terminal can map each type of BR size from the value calculated by (STID modulo k _n ). That is, the mapping contents of the BR preamble sequence for delay sensitivity having a high priority and a STID of 18 are as shown in Table 7 below.

表７を参照すると、移動端末は、計算値が、（１８ ｍｏｄｕｌｏ ８）により２となるから、シーケンスインデックスが２である地点から、あらかじめ定義されたＢＲ大きさをマッピングする。このような方法を用いると、移動端末間衝突確率は下げることができるが、基地局は、メッセージをデコーディングし、ＳＴＩＤを得てはじめて端末の要求した大きさがわかる。

Referring to Table 7, since the calculated value is 2 according to (18 modulo 8), the mobile terminal maps the BR size defined in advance from the point where the sequence index is 2. If such a method is used, the probability of collision between mobile terminals can be lowered, but the base station can know the size requested by the terminal only after decoding the message and obtaining the STID.

  As described above, the BR size may be set to a fixed size value that is different only in the starting point in the mobile terminal. Here, the fixed size of BR may be changed through S-SFH or an additional broadcast message. In addition, the BR size may be transmitted to each terminal through a MAC management message (eg, AAI_RNG-RSP, AAI_SBC-RSP) transmitted in an initial network entry process. Also, the BR size may be assigned a different size for each mobile terminal in the DSx processing process (dynamic service adding process, changing process or deleting process).

  For example, mobile terminal A can be defined as a form in which 0b00 is 100 bytes and 0b01 is 200 bytes, whereas mobile terminal B is 0b00 is 50 bytes and 0b01 is 100 bytes. Therefore, when the mobile terminal A transmits the BR preamble sequence mapped to 0b00 to the base station, the base station allocates a radio resource capable of transmitting 100 bytes to the mobile terminal A, and the mobile terminal B is mapped to 0b00. When transmitting the sequence, the base station can allocate a resource capable of transmitting 50 bytes to the mobile terminal B.

  The mobile terminal can map the BR preamble sequence by a flow identifier (FID: Flow ID). This method is to reorder each BR preamble sequence set in ascending or descending order according to the flow identifier value.

  For example, if the mobile terminal has FIDs 5, 8, and 12 that are used in a high priority delay sensitive service, the mobile terminal sets FID 5 to 2, FID 8 to 3, and FID 12 4 can be mapped.

  When the mobile terminal transmits a BR preamble sequence mapped by the FID to the base station, the mobile terminal can also transmit information used for the purpose of changing the QoS parameter set for the corresponding FID.

  For example, if a specific BR preamble sequence has a QoS parameter set of 1, change the QoS parameter set of the FID from the current QoS parameter set (example: 1) to another set (example: 0). It can be defined as meaning.

(Bandwidth Request Preamble Sequence Selection Method III)
Hereinafter, a method for selecting a BR preamble sequence in consideration of a priority, a delay degree, and / or a BR size, which are QoS parameters, will be disclosed.

  First, the mobile terminal can determine a BR preamble sequence based on information transmitted through a secondary super frame header (S-SFH).

  For example, the mobile terminal may know in advance a difference timer value taking into account the maximum scheduling delay value of the BR preamble sequence set. Alternatively, the difference timer value may be notified by the base station through S-SFH that transmits system information such as BR opportunity, BR backoff start / end, and the like. At this time, the mobile terminal can determine which BR preamble sequence set to select in consideration of the timer value of the corresponding difference and the maximum delay of data transmitted on the uplink.

  For example, if the difference timer of the BR preamble sequence set 0 is 20 ms, the difference timer of the BR preamble sequence set 1 is 40 ms, and the maximum delay value of data transmitted by the mobile terminal is 30 ms, the mobile terminal One BR preamble sequence is selected from preamble sequence set 0.

  Second, the mobile terminal can determine the BR preamble sequence through the DSx process.

  For example, each of the mobile terminal and the base station can exchange a dynamic service addition (DSA) process and a dynamic service change (DSC) message in the process of creating and modifying the service flow. . Both the mobile terminal and the base station can request generation and modification of service flows. In this process, the mobile terminal and the base station can negotiate determinants (eg, QoS key parameters) of the BR preamble sequence used when making an uplink resource request for the corresponding service flow. At this time, the mobile terminal and the base station can consider QoS parameters, BR size, and the like.

  FIG. 6 is a diagram illustrating one BR preamble index determination method using a DSx process according to an embodiment of the present invention.

  Referring to FIG. 6, a base station (ABS) can transmit a DSA-REQ message requesting generation of a service flow to a mobile terminal (AMS). At this time, the DSA-REQ message includes a QoS parameter of the corresponding service flow, a service flow identifier (FID), a BR preamble sequence set index used when requesting an uplink resource for the corresponding service flow, and an already set BR. One or more of an index (for example, BR magnitude index) and a difference timer value may be included (S610).

  The base station and the mobile terminal can configure and determine the BR size (or flow size) used in the 3-step random access process in the DSA process. Table 8 below shows an example of the BR size index.

表８のように、ＢＲ大きさインデックスが４ビットで構成されているとすれば、ＢＲ大きさインデックスは、総１６種類のＢＲ大きさを表すことができる。そのうち、基地局及び移動端末は、まだ使用していない一つのインデックス（０ｂ００１０）を、特定ＢＲ大きさに割り当て、該インデックスがいかなる大きさ（３００ｂｙｔｅ）を要請するものであるかを交渉するようになる。

As shown in Table 8, if the BR size index is composed of 4 bits, the BR size index can represent a total of 16 types of BR sizes. Among them, the base station and the mobile terminal allocate one index (0b0010) that is not yet used to a specific BR size, and negotiate what size (300 bytes) the index requests. Become.

  At this time, the base station and / or the mobile terminal can determine the size in consideration of the QoS parameter of the corresponding service flow. Therefore, if there is an index having the same size and the same characteristic, the base station transmits the index to the mobile terminal.

  When the mobile terminal needs to adjust the corresponding value, the mobile terminal transmits the DSA-RSP message including the adjusted BR size. In FIG. 6, it is assumed that the mobile terminal uses the value included in the DSA-REQ message as it is. In such a case, the DSA-RSP message may include the already set BR index (S620).

  When there is data to be transmitted in uplink for the corresponding service flow, the mobile terminal selects a BR preamble sequence based on information (such as an already set BR index) negotiated in the DSA process, (S630).

  Since the BR preamble sequence is selected based on the information negotiated in the process of generating and modifying the service flow, the base station determines the data transmitted by the mobile terminal based on the received BR preamble sequence and the information on the high-speed connection message. The main characteristics (extremely acute, etc.) and the requested bandwidth are easily known.

  The base station and / or the mobile terminal can use the BR magnitude index for changing the QoS parameter set in one flow (aGPS) instead of the actual BR magnitude information.

  For example, when 0b0011 is used for the purpose of changing the QoS parameter set, the mobile terminal can transmit the 0b0011 index value to the base station through the BR preamble sequence and the high speed connection message in step S630. The base station changes the current QoS parameter set (example: 1) of the flow identifier (FID) mapped to the BR magnitude index carried on the received BR code from another QoS parameter set (example: 0). It turns out that this means that the QoS parameter set is changed.

(Bandwidth request preamble sequence transmission method)
Hereinafter, an error processing process when an error occurs at the time of bandwidth request will be described. That is, a method for transmitting a BR preamble sequence selected by the mobile terminal according to BR preamble sequence selection methods I to III will be described.

3 Step random access number of BR preamble sequences used in the method _(k 0 ~k _m-1) or 5 step random access scheme number of BR preamble sequences used in the (k _m) may be predefined, It may be transmitted from the base station through S-SFH.

  The mobile terminal can transmit the BR preamble sequence selected according to the mapping rule disclosed in the bandwidth request preamble sequence selection methods I to III and the high-speed connection message to the base station. Also, the base station that has received the information can acquire information (for example, service type, priority, and / or scheduling type) carried on the BR preamble sequence according to the BR preamble sequence mapping rule.

  FIG. 7 is a diagram showing an example of a three-step random access system according to an embodiment of the present invention.

  FIG. 7 assumes that the mobile terminal selects and uses a BR preamble sequence according to the BR preamble sequence mapping rule of Table 4 described above. That is, it is assumed that the BR preamble sequence set and the BR preamble sequence range are determined by the uplink data service type, priority, and BR size. FIG. 7 also illustrates a case where the base station normally receives both the BR preamble sequence and the high-speed connection message transmitted from the mobile terminal.

  The mobile terminal transmits the BR preamble sequence selected based on the BR size and the characteristics of the uplink data to be transmitted and the high-speed connection message to the base station (S710).

  At this time, the mobile terminal starts a BR timer after transmitting a message in step S710. If the mobile terminal receives radio resource allocation information for UL data transmission from the base station or detects a reception failure through BR ACK before the BR timer expires, the mobile terminal terminates the corresponding timer. . However, if the mobile terminal cannot receive the radio resource allocation information until the BR timer expires, the mobile terminal can try the uplink resource request procedure (step S710) again.

  When the base station receives the BR preamble sequence and the high speed connection message, the base station can notify the mobile terminal whether the BR preamble sequence and the high speed connection message are received through the BR ACK message (S720).

  The base station knows the characteristics of data to be transmitted by the mobile terminal and the required bandwidth size through the received BR preamble sequence. In addition, since the received BR preamble sequence is a sequence allocated for the uplink request in the three-step random access scheme, the base station decodes the high-speed connection message, and determines the uplink bandwidth from the high-speed connection message. Can confirm the mobile terminal that requested Therefore, the base station allocates radio resources corresponding to the requested bandwidth to the mobile terminal within a differentiated time based on data characteristics, and assigns allocation information related to the general MAP information element (eg, UL basic allocation). A-MAP information element) can be transmitted to the mobile terminal (S730).

  The mobile terminal can transmit uplink data to the base station through the allocated uplink resource region (S740).

  FIG. 8 is a diagram showing another example of the 3-step random access system according to the embodiment of the present invention.

  In FIG. 8, it is assumed that the mobile terminal selects and uses a BR preamble sequence according to the BR preamble sequence mapping rule of Table 4 above. That is, it is assumed that the BR preamble sequence set and the BR preamble sequence range are determined by the uplink data service type, priority, and BR size. However, in FIG. 8, a case where the base station normally receives the BR preamble sequence transmitted from the mobile terminal but fails to receive the high-speed connection message is taken up.

The mobile terminal transmits the BR preamble sequence selected based on the BR size and the characteristics of the uplink data to be transmitted and the high-speed connection message to the base station (S810).
At this time, the mobile terminal starts a BR timer after transmitting the message in step S810. If the mobile terminal receives radio resource allocation information for UL data transmission from the base station or senses reception failure from BR ACK before the BR timer expires, the mobile terminal terminates the corresponding timer. . However, if the mobile terminal cannot receive the radio resource allocation information until the BR timer expires, the mobile terminal can try the uplink resource request procedure (step S810) again.

  When the base station receives the BR preamble sequence and the high speed connection message, the base station can notify the mobile terminal whether or not the BR preamble sequence and the high speed connection message are received through the BR ACK message (S820).

  The base station can know the characteristics of data to be transmitted by the mobile terminal and the required bandwidth from the received BR preamble sequence. Therefore, the base station can allocate radio resources for UL data transmission in consideration of the characteristics of the corresponding UL data and the required bandwidth size. However, since the base station cannot normally receive the high-speed information message including the station identifier (STID) for identifying the mobile terminal, the base station does not know the mobile terminal that requested the uplink bandwidth.

  Accordingly, the base station can inform the mobile terminal of information on the allocated radio resource through a CDMA allocation A-MAP information element that is CRC-masked with a RAID (Random Access ID) (S830).

  In step S830, the RAID is an identifier generated based on a BR preamble sequence received at the base station and a BR opportunity when the corresponding sequence is detected. The base station and the mobile terminal can be identified. That is, although the base station could not normally receive the high-speed connection message, the base station can understand the size of the bandwidth requested by the mobile terminal and the characteristics of the UL data to be transmitted.

  The mobile terminal can transmit uplink data to the base station through the allocated uplink resource region (S840).

  FIG. 9 is a diagram showing another example of the 3-step random access method according to an embodiment of the present invention.

  FIG. 9 assumes that the mobile terminal selects and uses a BR preamble sequence according to a mapping rule such as the BR preamble sequence mapping rule of Table 7 or the DSx processing method of Table 8 above. That is, it is assumed that the BR preamble sequence set and the BR preamble sequence range are determined by the service type, priority, BR magnitude and / or BR magnitude index of the uplink data. However, FIG. 9 shows a case where the base station has successfully received the BR preamble sequence transmitted from the mobile terminal but failed to receive the high-speed connection message.

  The mobile terminal selects a BR preamble sequence based on the mapping scheme described in Table 7 according to the BR size and the characteristics of uplink data to be transmitted. Accordingly, the mobile terminal transmits the selected BR preamble sequence and the high-speed connection message to the base station (S910).

  When receiving the BR preamble sequence and the high speed connection message, the base station can notify the mobile terminal whether the BR preamble sequence and the high speed connection message are received through the BR ACK message (S920).

  The base station knows only the characteristics of the data that the mobile terminal intends to transmit from the received BR preamble sequence. However, since the base station cannot normally receive the high-speed information message including the station identifier (STID) for identifying the mobile terminal, it cannot know how much uplink bandwidth the mobile terminal has requested.

  Therefore, the base station allocates an uplink radio resource for transmitting the BR header to the mobile terminal, and information on the allocated radio resource is CDMA allocated A-MAP information element CRC-masked with RAID (Random Access ID). Through this, the mobile terminal can be notified (S930).

  In step S930, the RAID is an identifier generated by a BR preamble sequence received at the base station and a BR opportunity at which the corresponding sequence is sensed, and both the base station and the mobile terminal identify this identifier. it can. Although the base station has not received the high-speed connection message normally, since the characteristics of the UL data transmitted by the mobile terminal can be known, it can be determined whether or not resource allocation for BR header transmission is urgent. If the mobile terminal selects the BR preamble sequence only based on the mapping scheme described in Table 8, the base station does not know the characteristics of the UL data transmitted by the mobile terminal.

  The mobile terminal can transmit the BR header to the base station through the allocated uplink resource region (S940).

  FIG. 10 is a diagram showing still another example of the 3-step random access method according to an embodiment of the present invention.

  FIG. 10 assumes that the mobile terminal selects and uses a BR preamble sequence according to the BR preamble sequence mapping rule of Table 4 above. That is, it is assumed that the BR preamble sequence set and the BR preamble sequence range are determined by the uplink data service type, priority, and BR size. However, FIG. 10 takes up a case where the base station fails to receive the BR preamble sequence transmitted from the mobile terminal or the high-speed connection message.

   Referring to FIG. 10, the mobile terminal can transmit the BR preamble sequence selected according to the BR preamble sequence mapping rule of Table 4 and the high speed connection message to the base station (S1010).

  The mobile terminal starts the BR timer after transmitting the BR preamble sequence and the high speed connection message. If the mobile terminal receives uplink radio resource allocation information before the BR timer expires, or if the mobile terminal senses reception failure of the BR preamble sequence and the high-speed connection message through the BR ACK message, the mobile terminal Can be terminated. However, if the mobile terminal fails to receive the uplink allocation information until the BR timer expires, the mobile terminal can repeat step S1010.

  When the base station receives the BR preamble sequence and the high speed connection message, the base station can notify the mobile terminal whether or not the BR preamble sequence and the high speed connection message are received through the BR ACK message (S1020).

  At this time, since reception of both the BR preamble sequence and the high-speed connection message has failed, information on the BR preamble sequence transmitted by the mobile terminal is not included in the reception sequence list included in the BR ACK message. Accordingly, the mobile terminal terminates the BR timer and retransmits the BR preamble sequence and the high-speed connection message transmitted in step S1010 to the base station (S1030).

  7 to 10, the method of selecting and using the BR preamble sequence mapped by the BR preamble sequence mapping scheme described in Table 4, Table 7 or Table 8 has been described. In FIG. 10, the BR preamble mapped by the BR preamble sequence mapping method described in Tables 1 to 3, Table 5, and Table 6 can be selected.

  FIG. 11 is a diagram showing an example of a 5-step random access system according to an embodiment of the present invention.

  In the embodiment of the present invention, it is assumed that the BR preamble sequence used in the 3-step random access scheme and the BR preamble sequence used in the 5-step random access scheme are used separately. For example, the mobile terminal uses the BR preamble sequence mapping rule described in Tables 1 to 8 when using the 3-step random access method, and maps to the 3-step random access method when using the 5-step random access method. Other than the BR preamble sequence made can be used. That is, a BR preamble sequence set may be configured by a 3-step and 5-step random access scheme, and a BR preamble sequence may be selected from the set.

  The mobile terminal transmits the BR preamble sequence allocated for the 5-step random access scheme to the base station to request uplink bandwidth allocation (S1110).

  In step S1110, the mobile terminal transmits a BR preamble sequence and then starts a default BR timer. If the mobile terminal fails to receive the uplink radio resource allocation information until the default BR timer expires, or if it detects transmission failure of the BR preamble sequence through the BR ACK, the mobile terminal ends the default BR timer. To do. However, if the mobile terminal fails to receive the radio resource allocation information until the default BR timer expires, the mobile terminal can repeat step S1110.

  When the base station recognizes that the received BR preamble sequence is a sequence assigned for the 5-step random access scheme, the base station does not decode the high-speed connection message. In addition, when receiving the BR preamble sequence, the base station can notify the mobile terminal whether or not the BR preamble sequence has been normally received through the BR ACK message (S1120).

  The base station does not know the characteristics of data to be transmitted by the mobile terminal and the required bandwidth from the received BR preamble sequence. Therefore, the base station allocates uplink radio resources for transmitting the BR header to the mobile terminal, and information on the allocated radio resources is CDMA allocation A-MAP information in which the CRC is masked by RAID (Random Access ID) The mobile terminal can be notified through the element (S1130).

  In step S1130, the RAID is an identifier generated based on a BR preamble sequence received by the base station and a BR opportunity where the corresponding sequence is detected, and can be identified by the base station and the mobile terminal.

  The mobile terminal can transmit the BR header to the base station through the allocated uplink resource region (S1140).

  FIG. 12 is a diagram showing another example of the 5-step random access system according to an embodiment of the present invention.

  FIG. 12 shows a 5-step uplink resource request procedure in the case where the base station cannot normally receive the dedicated BR preamble sequence used in the 5-step random access scheme transmitted from the mobile terminal.

  The mobile terminal selects the BR preamble sequence occupied for the 5-step random access scheme and transmits it to the base station to request allocation of uplink radio resources (S1210).

  The mobile terminal starts a default BR timer after transmitting the BR preamble sequence. If the mobile terminal receives radio resource allocation information or senses reception failure of the BR preamble sequence through BR ACK when the default BR timer expires, the mobile terminal ends the corresponding default BR timer. However, if the mobile terminal fails to receive the radio resource allocation information until the default BR timer expires, the mobile terminal can try the uplink resource request procedure again.

  When receiving the BR preamble sequence, the base station can inform the mobile terminal whether or not the BR preamble sequence has been successfully received through the BR ACK message (S1220).

  At this time, since reception of the BR preamble sequence has failed, information regarding the BR preamble sequence transmitted by the mobile terminal is not included in the reception sequence list included in the BR ACK message. Accordingly, the mobile terminal terminates the BR timer and retransmits the BR preamble sequence transmitted in operation S1210 to the base station (S1230).

  FIG. 13 is a diagram illustrating a mobile terminal and a base station according to still another embodiment of the present invention, which can perform the embodiment of the present invention described with reference to FIGS.

  Mobile terminals and base stations can include transmitters and receivers. Therefore, the mobile terminal can operate as a transmitting end in the uplink and operate as a receiving end in the downlink. Further, the base station can operate as a receiving end in the uplink and operate as a transmitting end in the downlink.

  That is, the mobile terminal and the base station include a transmission module (Tx module) 1340 and 1350 and a reception module (Rx module) 1350 and 1370, respectively, to control transmission and reception of information, data, and / or messages. And may include antennas 1300, 1310, etc. for transmitting and receiving information, data and / or messages.

  Here, the transmission module can control one or more radio frequency (RF) transmitters, and the reception module can control one or more RF receivers. However, the number of RF transmitters and the number of RF receivers may be different from each other. For the base station, the receiving module preferably controls one RF receiver to receive uplink data, and the transmitting module controls two or more RF transmitters to transmit downlink data.

  In addition, each of the mobile terminal and the base station includes processors 1320 and 1330 for performing the above-described embodiments of the present invention, and storage memories 1380 and 1390 that temporarily or continuously process the processing of the processor, respectively. Can do. In particular, the processors 1320 and 1330 can control the BR preamble sequence selection method for performing the random access scheme disclosed in the embodiments of the present invention.

  The processor included in the mobile terminal and the base station may comprise a medium connection control (MAC) entity. The MAC entity is a logical entity and may exist inside or outside the mobile terminal and base station processor. That is, the mobile terminal and the base station can perform the operation of the embodiment of the present invention described above with reference to FIGS. 2 to 12 using the MAC entity.

  The transmission module and the reception module included in the mobile terminal and the base station include a packet modulation / demodulation function for data transmission, a high-speed packet channel coding function, an Orthogonal Frequency Division Multiple Access (OFDMA) packet scheduling, and time division. Duplex (TDD) packet scheduling and / or channel multiplexing functions may be performed.

  The apparatus described in FIG. 13 is a means by which the method described in FIGS. 2 to 12 can be implemented. The embodiment of the present invention can be implemented using the components and functions of the mobile terminal and base station apparatus described above.

  The processor 1320 provided in the mobile terminal can perform the above-described BR preamble sequence selection methods I to III. That is, the processor can control the mobile terminal to select a BR preamble sequence based on information included in the QoS key parameter and data service characteristics. Also, the mobile terminal can perform the 3-step random access method or the 5-step random access method described with reference to FIGS. 7 to 12 using the selected BR preamble sequence.

  That is, the mobile terminal and the base station control the processor to perform signaling (for example, DAx processing) for selecting a BR preamble sequence, or to set an already set BR index (for example, the memory). The BR preamble sequence can be selected from the BR preamble mapping method defined in Tables 1 to 7.

  In addition, the processor of the mobile terminal controls the transmission module to transmit the selected BR preamble sequence and / or the high speed connection message to the base station. The base station decodes the BR preamble sequence received through the receiving module and allocates uplink radio resources to the mobile terminal. In addition, the processor of the base station can control the transmission module to inform the mobile terminal of information regarding the allocated radio resources.

  On the other hand, in the present invention, the mobile terminal includes a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a GSM (Global System for Mobile) phone, and a W (Wide Wide Phone for Mobile). CDMA), MBS (Mobile Broadband System), handheld PC (Hand-Held PC), notebook PC, smart phone or multi-mode multi-band (MM-MB) terminal Can be used.

  Here, a smartphone is a terminal that combines the merits of a mobile communication terminal and a personal mobile terminal, and data such as schedule management, fax transmission / reception, and Internet connection, which are functions of the personal mobile terminal, are added to the mobile communication terminal. It means a terminal that combines communication functions. The multi-mode multi-band terminal incorporates a multi-modem chip, and is a mobile Internet system and other mobile communication systems (for example, a CDMA (Code Division Multiple Access) 2000 system, a WCDMA (Wideband CDMA) system, etc.). A terminal that can operate in either case.

  Embodiments according to the present invention can be implemented by various means such as hardware, firmware, software, or a combination thereof.

  In the case of implementation by hardware, the method according to an embodiment of the present invention includes one or more ASICs (application specific integrated circuits), DSPs (digital signal processors), DSPSs (digital signal processing), DSPS (digital signal processing). logic devices), FPGAs (field programmable gate arrays), a processor, a controller, a microcontroller, a microprocessor, and the like.

  In the case of implementation by firmware or software, a method according to an embodiment of the present invention may be in the form of a module, procedure, function, or the like that performs the functions or operations described above. For example, software code can be stored in memory units 1380 and 1390 and driven by processors 1320 and 1330. The memory unit is provided inside or outside the processor, and can exchange data with the processor by various known means.

  It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the technical spirit and essential features of the invention. Accordingly, the above detailed description should not be construed as limiting in any respect and should be considered as exemplary. The scope of the invention should be determined by reasonable analysis of the appended claims, and thus all modifications within the equivalent scope of the invention are included in the scope of the invention. It is obvious that claims which do not have an explicit citation relationship in the claims can be combined to constitute an embodiment, or can be included as new claims by amendment after application.

  The embodiments of the present invention can be applied to various wireless connection systems. Examples of various wireless access systems include 3GPP (3rd Generation Partnership Project), 3GPP2 and / or IEEE 802. xx (Institut of Electric and Electronic Engineers 802) system. The embodiment of the present invention can be applied to any technical field to which these various wireless connection systems are applied in addition to these various wireless connection systems.

The above-described first and second embodiments of the present invention are only a part of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be applied to various fields in the art. Those of ordinary skill in the art will be able to derive and understand from the detailed description of the invention set forth below.
(Item 1)
A method of performing random access in a wireless connection system,
Receiving from the base station a first message including an already configured bandwidth request index;
Selecting a bandwidth request preamble sequence from the already set bandwidth request index based on characteristics of uplink data transmitted by the mobile terminal;
Transmitting a second message including the already set bandwidth request index to the base station;
Transmitting the selected bandwidth request preamble sequence to the base station;
Including random access methods.
(Item 2)
The characteristics of the uplink data are:
The random access method according to item 1, wherein the random access method represents one or more of a service type, a priority order, a scheduling type, and a bandwidth request size associated with the uplink data.
(Item 3)
The already set bandwidth request index is:
Item 3. The random access method according to Item 2, comprising a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information.
(Item 4)
The step of selecting the bandwidth request preamble sequence includes:
The mobile terminal selects the bandwidth request preamble sequence set index based on the uplink data characteristics;
4. The random access method according to item 3, comprising: selecting the bandwidth request preamble sequence from the bandwidth request preamble sequence set index.
(Item 5)
Receiving from the base station an acknowledgment message indicating that the bandwidth request preamble sequence has been successfully received;
The method of claim 2, further comprising: receiving a map message including information on radio resources allocated for transmission of the uplink data or transmission of a bandwidth request header from the base station. .
(Item 6)
Receiving from the base station a reception confirmation message indicating whether the bandwidth request preamble sequence has been successfully received;
Retransmitting the bandwidth request preamble sequence to the base station when the reception confirmation message indicates that reception of the bandwidth request preamble sequence has failed;
The random access method according to Item 2, further comprising:
(Item 7)
3. The random access method according to item 2, wherein the mobile terminal transmits a high-speed connection message including a station identifier for identifying the mobile terminal in the step of transmitting the bandwidth request preamble sequence.
(Item 8)
8. The random access method according to item 7, further comprising: receiving a reception confirmation message indicating a reception state of the bandwidth request preamble sequence and the high speed connection message from the base station.
(Item 9)
When the reception confirmation message indicates that the bandwidth request preamble sequence is normally received and the high-speed connection message is not normally received,
9. The random access method according to item 8, further comprising receiving a map message including information on radio resources allocated for transmission of the uplink data or transmission of a bandwidth request header from the base station.
(Item 10)
The acknowledgment message indicates that both the bandwidth request preamble sequence and the fast connection message were not successfully received;
9. The random access method according to item 8, further comprising: retransmitting the bandwidth request preamble sequence and the high speed connection message to the base station.
(Item 11)
The first message is either a dynamic service addition request (DSA-REQ) message or a dynamic service change request (DSC-REQ) message,
The random access method according to item 1, wherein the second message is either a dynamic service addition response (DSA-RSP) message or a dynamic service change response (DSC-RSP) message.
(Item 12)
A mobile terminal that performs random access in a wireless connection system,
A transmission module for transmitting a radio signal;
A receiving module for receiving a radio signal;
A processor for controlling the random access;
Including
The processor is
Receiving a first message including a bandwidth request index already set from the base station;
Selecting a bandwidth request preamble sequence from the already set bandwidth request index based on characteristics of uplink data transmitted by the mobile terminal;
Transmitting a second message including the already set bandwidth request index to the base station;
Transmitting the selected bandwidth request preamble sequence to the base station.
(Item 13)
The characteristics of the uplink data are:
The mobile terminal according to item 12, wherein the mobile terminal indicates one or more of a service type, a priority order, a scheduling type, and a bandwidth request size associated with the uplink data.
(Item 14)
The already set bandwidth request index is:
Item 14. The mobile terminal according to Item 13, comprising a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information.
(Item 15)
The step of selecting the bandwidth request preamble sequence includes:
The mobile terminal selects the bandwidth request preamble sequence set index based on the uplink data characteristics;
Selecting the bandwidth request preamble sequence from the bandwidth request preamble sequence set index;
15. The mobile terminal according to item 14, including:

Claims (15)

A method of performing random access in a wireless connection system,
Receiving from the base station a first message including an already configured bandwidth request index;
Selecting a bandwidth request preamble sequence from the already set bandwidth request index based on characteristics of uplink data transmitted by the mobile terminal;
Transmitting a second message including the already set bandwidth request index to the base station;
Transmitting the selected bandwidth request preamble sequence to the base station;
Including random access methods. The characteristics of the uplink data are:
The random access method of claim 1, wherein the random access method represents one or more of a service type, a priority order, a scheduling type, and a bandwidth requirement size associated with the uplink data. The already set bandwidth request index is:
The random access method according to claim 2, comprising a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information. The step of selecting the bandwidth request preamble sequence includes:
The mobile terminal selects the bandwidth request preamble sequence set index based on the uplink data characteristics;
The random access method according to claim 3, further comprising: selecting the bandwidth request preamble sequence from the bandwidth request preamble sequence set index. Receiving from the base station an acknowledgment message indicating that the bandwidth request preamble sequence has been successfully received;
Receiving a map message including information on radio resources allocated for transmission of the uplink data or transmission of a bandwidth request header from the base station. Method. Receiving from the base station a reception confirmation message indicating whether the bandwidth request preamble sequence has been successfully received;
Retransmitting the bandwidth request preamble sequence to the base station when the reception confirmation message indicates that reception of the bandwidth request preamble sequence has failed;
The random access method according to claim 2, further comprising:   The random access method according to claim 2, wherein the mobile terminal transmits a high-speed connection message including a station identifier for identifying the mobile terminal together when transmitting the bandwidth request preamble sequence. .   The random access method according to claim 7, further comprising: receiving a reception confirmation message indicating a reception state of the bandwidth request preamble sequence and the high-speed connection message from the base station. When the reception confirmation message indicates that the bandwidth request preamble sequence is normally received and the high-speed connection message is not normally received,
The random access method of claim 8, further comprising: receiving a map message including information on radio resources allocated for transmission of the uplink data or transmission of a bandwidth request header from the base station. The acknowledgment message indicates that both the bandwidth request preamble sequence and the fast connection message were not successfully received;
The random access method of claim 8, further comprising: retransmitting the bandwidth request preamble sequence and the high speed connection message to the base station. The first message is either a dynamic service addition request (DSA-REQ) message or a dynamic service change request (DSC-REQ) message,
The random access method according to claim 1, wherein the second message is either a dynamic service addition response (DSA-RSP) message or a dynamic service change response (DSC-RSP) message. A mobile terminal that performs random access in a wireless connection system,
A transmission module for transmitting a radio signal;
A receiving module for receiving a radio signal;
A processor for controlling the random access;
Including
The processor is
Receiving a first message including a bandwidth request index already set from the base station;
Selecting a bandwidth request preamble sequence from the already set bandwidth request index based on characteristics of uplink data transmitted by the mobile terminal;
Transmitting a second message including the already set bandwidth request index to the base station;
Transmitting the selected bandwidth request preamble sequence to the base station. The characteristics of the uplink data are:
The mobile terminal according to claim 12, wherein the mobile terminal indicates one or more of a service type, a priority order, a scheduling type, and a bandwidth request size associated with the uplink data. The already set bandwidth request index is:
The mobile terminal according to claim 13, comprising a bandwidth request preamble sequence set index and bandwidth request preamble sequence range information. The step of selecting the bandwidth request preamble sequence includes:
The mobile terminal selects the bandwidth request preamble sequence set index based on the uplink data characteristics;
Selecting the bandwidth request preamble sequence from the bandwidth request preamble sequence set index;
The mobile terminal according to claim 14, comprising:

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