RU2444158C2 - Device and method to control connection identification in communication system - Google Patents

Abstract

FIELD: information technologies.

SUBSTANCE: method and device are proposed to transfer/receive connection identification (CID) in the communication system. Having detected the necessity to transfer its service, the mobile station (MS) sends a message of service transfer request to the first basic station (BS) that executes connection with MS. When receiving the message of service transfer request, the first BS sends to MS at least one CID to establish the connection with the second BS, to which MS will perform service transfer, together with the message of the service transfer response in response to the message of the service transfer request. MS receives CID by means of the message of the service transfer response.

EFFECT: reduced time delays in communication.

56 cl, 5 dwg, 4 tbl

Description

BACKGROUND

In a communication system, a mobile station (MS) must have a connection established with a base station (BS) in order to communicate with the BS. To identify each connection with the BS, the MS is assigned a connection identifier (CID) from the BS. For the MS, during its initial access to the communication system network, a basic CID and a primary control CID are assigned from the BS to exchange control data or control signals with the BS. In addition, the MS is assigned a transport CID for exchanging user data.

That is, the transport CID is assigned to each connection sequentially, one after the other. Therefore, one MS can use several transport CIDs. Meanwhile, the CID values used in the communication system are, for example, 16-bit in size and can be classified into different types according to their uses, and the use of CID values is shown in Table 1.

Table 1 Cid Value Description Initial Ranging CID 0x0000 Used by the subscriber station (SS) and BS during the initial ranking process (establishing a connection when entering the network) Basic CID (Basic CID) 0x0001 - m The same value is assigned to both downlink (DL) and uplink (UL) connections Primary management CID (Primary CID
management) n + 1 - 2m The same value is assigned to both DL and UL connections. Transport CID, Secondary Mgt CID (Transport CID, Secondary Management CID) 2m1 + - FE9F For a secondary control connection, the same value is assigned to both DL and UL connections Multicast CID (Multicast CID) 0xFEA0 - 0xFEFE For the downlink multicast service, the same value is assigned on the same channel to all MSs that participate in this connection AAS initial ranging CID (AAS initial ranking CID) 0xFEFF A BSA supporting AAA must use this CID when allocating the AAS ranking interval (using the AAS_ranging_allocation information element (IE)) Multicast polling CID (Serial Polling CID) 0xFF00 - 0xFFC9 A BS may be included in one or more polling multicast groups in order to obtain a frequency band by polling. These connections do not have an associated data service flow. Normal Mode Multicast CID 0xFFFA Used in a downlink access card (DL-MAP) message to denote packets for transmitting DL broadcast information to an MS in normal mode Inactive Multicast CID 0xFFFB Used in DL-MAP to denote packets for transmitting DL broadcast information on an MS in inactive (sleep) mode. May also be used in MOB_TRF_IND messages. Standby Multicast CID 0xFFFC Used in DL-MAP to denote packets for transmitting DL broadcast information to the MS in standby (standby) mode. May also be used in MOB_PAG_ADV messages. Fragmented Broadcast CID 0xFFFD Used by the BS to transmit fragmentation control broadcast information. The fragment subheading should use an FSN (fragment sequence number) of 11-bit length on this connection Padding CID 0xFFFE Used to transfer placeholder information via SS and BS Broadcast CID (Broadcast CID) 0xFFFF Used to broadcast information that is transmitted on the downlink to all SS

Table 1 shows the different types of CIDs used in the communication system, and according to their use, they can be classified into ranking CID, basic CID, primary control CID, transport CID, multicast CID, ranking CID with support for adaptive antenna system (AAS) , Polling CID, Multicast CID for Normal Mode, Standby Multicast CID, Inactive Mode CID, Fragmented Broadcast CID, Fill CID, and CID irokoveschatelnoy transmission.

In addition, the BS can assign each MS a base CID, a primary management CID, a transport CID, a multicast CID, and a polled multicast CID. Among the CIDs, the multicast CID and the poll multicast CID are assigned collectively to a plurality of MSs. However, the base CID and primary management CID are uniquely assigned to each MS.

A ranking CID is a CID used in performing MS access to a BS and attempting to perform ranking.

The base CID and primary management CID are CIDs that are mainly assigned from the BS of each MS when it accesses the BS. A sequential poll multicast CID is a CID that predetermined specific MSs use together. Fill CID is a CID that MS and BS use together to indicate Fill. A broadcast CID is a CID that a BS uses to notify MSs that a message including the corresponding CID is a broadcast message.

In general, the CID assigned by the MS from the BS has a unique value within one BS, and if the MS moves from the coverage area of one BS to the coverage area of another BS, the MS must be assigned a new CID from the new BS.

After that, during the handover due to a change for the service access point MS, the BS and MS exchange with each other the basic CID and the CID of the primary control, as described below.

1 is a signaling diagram illustrating CID transmission / reception in a conventional communication system. In the case shown here, it is assumed that the MS is performing handover.

1, the communication system comprises an MS 110, a first BS 120, and a second BS 130. It is assumed that the first BS 120 is a serving BS that currently provides a communication service for MS 110, and the second BS 130 is a target BS to which MS 110 will perform a handover.

In step 111, the first BS 120 transmits a downlink channel descriptor (DCD) message to the MS 110. The DCD message is a message broadcast by the first BS 120.

At step 113, upon receiving the DCD message, the MS 110 transmits a ranking request message (RNG-REQ) to the first BS 120. MS 110 delivers basic call connection information to the first BS 120 in an RNG-REQ message.

In step 115, the first BS 120 transmits a ranking response message (RNG-RSP) to the MS 110 in response to the RNG-REQ message. In this case, the first BS 120, together with the RNG-RSP message, transmits the base CID to the MS 110 to exchange control signals for initial access. For example, it is assumed that the base CID is '10'. The MS 110 performs synchronization obtaining and transmit power control operations with the first BS 120 by performing a ranking operation according to steps 113-115.

At step 117, the MS 110 transmits to the first BS 120 a message (SBC-REQ) requesting the basic capabilities of the subscriber station to negotiate the basic capabilities with the first BS 120. The SBC-REQ message includes information on the modulation scheme and / or coding scheme available for the MS 110.

At step 119, the first BS 120 transmits to the MS 110 a response message (SBC-RSP) about the basic capabilities of the subscriber station in response to the SBC-REQ message.

In this case, the first BS 120 checks the information included in the SBC-REQ message regarding the modulation scheme and / or coding scheme available for the MS 110.

The SBC-REQ message and the SBC-RSP message are a type of medium access control (MAC) layer message that the MS 110 transmits / receives to negotiate basic capabilities with the first BS 120.

At step 121, the MS 110 transmits a registration request message (REG-REQ) to the first BS 120. Upon receiving the REG-REQ message, the first BS 120 detects the registration information MS included in the REG-REQ message, thereby registering the MS 110 in the first BS 120.

At step 123, the first BS 120 transmits to the MS 110 a registration response message (REG-RSP) with registration information regarding the MS 110 registered in response to receiving the REG-REQ message. In this case, the first BS 120, together with the RNG-RSP message, transmits the primary control CID to the MS 110 to exchange control signals for initial access. For example, it is assumed that the primary management CID will be '110'.

At step 125, the MS 110 establishes a connection with the first BS 120 using the basic CID (= 10) and CID (= 110) of the primary control. For MS 110, a transport CID may be additionally assigned to exchange user data with the first BS 120.

Meanwhile, upon detecting the need for a handover, the MS 110 sends to the first BS 120 a handover request message (HO-REQ) to the first BS 120. At step 129, the first BS 120 transmits a handover response message (HO-RSP) in response to the HO-REQ message to the first BS 120. The HO-RSP message contains information regarding the target BS (e.g., the second BS 130) into which the MS 110 will perform handover. MS 110 determines whether to perform handover to the second BS 130 based on the information included in the HO-RSP message. If the MS 110 decides to perform the handover to the second BS 130, the MS 110 in step 131 transmits a handover indication message (HO-IND) to the first BS 120 indicating that it will shortly perform the handover to the second BS 130, and then, in step 133, transmits the RNG-REQ message to the target handover BS (i.e., the second BS 130).

At step 135, the second BS 130 transmits an RNG-RSP message to the MS 110 in response to the RNG-REQ message. The RNG-RSP message contains the base CID and primary control CID for updating the CID for MS 110. The second BS 130 may exchange its control data, or control signals, through the basic CID and primary control CID assigned by it to MS 110 and updated. For example, it is assumed that the base CID will be '0', and it is believed that the CID of the primary control will be '430'. After receiving the RNG-RSP message from the second BS 130, the MS 110 updates the CID (basic CID and primary control CID) using the CID values included in the RNG-RSP message. After that, at step 137, a connection is established between the MS 110 and the second BS 130.

After performing the update, the CID MS 110 exchanges control data, or control signals, with the second BS 130, and can subsequently transmit / receive user data by assigning transport CIDs.

As described above, the CID is the value that each BS assigns to the MS currently communicating with the corresponding BS, and when the MS switches from its current BS to the new BS, it must be assigned a new CID from the new BS.

In other words, for an MS performing a handover or resuming communication, a CID value (s) is assigned from the target BS or its new BS, and then its CID is updated so that it can transmit / receive data. In general, however, the time required by the MS to update its CID value (s) is, for example, 50 ms - 100 ms.

As stated above, an MS intending to perform a handover or communicate with a new BS must receive the newly assigned CID value (s), and the receipt of the CID causes a time delay.

SUMMARY OF THE INVENTION

In order to eliminate the above-described drawbacks of the prior art, a main aspect of the present invention is to provide a CID control apparatus and method according to which, in a communication system, MS and BS do not have time delays.

Another aspect of the present invention is to provide a method and apparatus for controlling corresponding CIDs in a communication system using values predetermined between the MS and the BS, without the procedure for directly exchanging CID values.

According to one aspect of the present invention, a method for managing a Connection Identification (CID) by a first base station (BS) in a communication system is provided. The CID control method includes the steps of broadcasting a first setpoint and a second setpoint; assigning a basic CID to the MS and transmitting the basic CID to the MS after identifying the need to assign the basic CID to the mobile station (MS); and assigning a primary control CID to the MS by adding the first setpoint to the base CID.

According to another aspect of the present invention, a method for managing connection identification (CID) by a mobile station (MS) in a communication system is provided. The CID control method includes the steps of receiving a first setpoint and a second setpoint broadcast from the first base station (BS); transmitting, to the first BS, a base CID assignment request, and receiving the assigned base CID from the first BS; and obtaining the primary control CID for the MS by adding the first setpoint to the base CID.

According to another further aspect of the present invention, there is provided an apparatus for managing connection identification (CID) in a communication system. The CID control device includes a first base station (BS) including a transmitter for broadcasting a first setpoint and a second setpoint; and a CID assignment module for, when detecting a need to assign a base CID of the mobile station (MS), assign a base CID for the MS, deliver the base CID to the transmitter, and assign the primary control CID to the MS by adding the first setpoint to the base CID.

According to another aspect of the present invention, there is provided an apparatus for managing connection identification (CID) in a communication system. The CID control device includes a mobile station (MS) including a receiver for receiving from the first base station (BS) a base CID, a first set value and a second set value; a transmitter for transmitting to the first BS a base CID assignment request; and a CID calculation module, to receive the base CID assigned from the first BS supplied from the receiver and obtain the primary control CID for the MS by adding the first set value to the base CID.

According to a further aspect of the present invention, there is provided a method for transmitting a Connection Identification (CID) to a serving base station (BS) in a communication system. The CID transmission method includes the steps of receiving a handover request message from a mobile station (MS); and transmitting a handover response message to the MS in response to the handover request message. The handover response message includes k first CID values for establishing a connection between the MS and k target BSs to which the MS will perform handover, and the offset by which the MS obtains k second CIDs using the k first CIDs, where k is an integer number greater than 1.

According to another aspect of the present invention, there is provided a method for receiving a Connection Identification (CID) by a mobile station (MS) in a communication system. A method for receiving a CID includes the steps of transmitting to a serving base station (BS) communicating with an MS a handover request message after detecting a need for handover; receiving from the serving BS a handover response message in response to a handover request message; and obtaining k second CIDs using the k first CIDs and the offset included in the handover response message. The k values of the first CIDs are CID values for establishing a connection with at least k target BSs to which the MS will handoff, and the offset is the value used to obtain k second CIDs using the k first CIDs, k is an integer more than 1.

According to another aspect of the present invention, there is provided a device for transmitting a connection identifier (CID) in a communication system. The CID transmission device includes a serving base station (BS) for receiving a handover request message from a mobile station (MS), and transmitting a handover response message to the MS in response to the handover request message. The handover response message includes k first CIDs for establishing a connection between the MS and k target BSs to which the MS will handoff, and an offset by which the MS obtains k second CIDs using the k first CIDs, where k is an integer more than 1.

According to another aspect of the present invention, there is provided a device for receiving connection identification (CID) in a communication system. The CID receiving device includes a mobile station (MS) for detecting a handover, transmitting a handover request message to a serving base station (BS) communicating with the MS, and receiving a handover response message from the serving BS in response to the message handover request. The handover response message includes k first CIDs to establish a connection with k target BSs to which the MS will handoff, and an offset by which the MS obtains k second CIDs using the k first CIDs, where k is an integer greater than 1 .

BRIEF DESCRIPTION OF THE DRAWINGS

For a more complete understanding of the disclosure of the essence of the present invention and its advantages, reference is made to the following description, illustrated by the drawings, in which the same reference position represent the same elements:

1 is a signaling diagram illustrating a transmission / reception of a CID in a conventional communication system. In the case shown here, it is assumed that the MS is performing handover;

2 is a signaling diagram illustrating CID transmission / reception in a communication system according to a first embodiment of the present invention;

3 is a signaling diagram illustrating a CID control operation in a communication system according to a second embodiment of the present invention;

4 is a block diagram illustrating a structure of a BS according to an embodiment of the present invention; and

5 is a block diagram illustrating an MS structure according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Figure 1-5 discussed below and the various embodiments used in this patent document to describe the principles of the present disclosure are presented by way of illustration only and should not be construed as limiting the scope of disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably organized wireless communication system.

The present invention provides a method and apparatus for managing the corresponding Connection Identifiers (CIDs) in a communication system without a procedure in which MS and BS directly exchange CID values.

A first embodiment of the present invention provides a method for assigning and managing, in a communication system, the CID value (s), specifically the base CID and the primary control CID. More specifically, the first embodiment represents a method in which an MS obtains a CID when it intends to perform handover to a target BS.

2 is a signaling diagram illustrating CID transmission / reception in a communication system according to a first embodiment of the present invention.

2, the communication system includes an MS 210, a first BS 220 and a second BS 230. It will be assumed that the first BS 220 is a serving BS that currently provides a communication service for MS 210, and the second BS 230 is a target BS to which the MS 210 will perform a handover.

In step 211, the first BS 220 transmits a downlink channel descriptor (DCD) message to the MS 110. The DCD message is a message broadcast by the first BS 220. In the present invention, if the first BS 220 assigns only the base CID to the MS 210, the DCD message includes an offset value used to obtain the CID of the primary control. That is, upon accepting the base CID value of the MS 210 without receiving a separate primary control CID, it can obtain the primary control CID by applying an offset value to the base CID value.

Similarly, when the first BS 220 assigns only the primary control CID to the MS 210, its DCD message includes an offset value used to obtain the base CID value. That is, upon receiving the primary control CID value, the MS 210 without receiving a separate base CID can obtain the basic CID by applying the offset value to the primary control CID value.

Equation 1 shows an example of obtaining the primary control CID by adding the offset to the base CID value, and obtaining the basic CID by adding the offset to the primary control CID.

Primary management CID = Base CID + primary management CID offset.

Base CID = Primary Management CID + Base CID Offset. (Lv. 1)

If the first BS 220 assigns both a basic CID and a primary management CID to the MS 210, then the offset value is not transmitted.

2, it will be assumed that the first BS 220 transmits a basic CID value to the MS 210, and obtains a primary control CID value by applying an offset value to the basic CID value. In this case, the DCD message of step 211 includes an offset value used to obtain the CID of the primary control, and it is assumed that the offset value will be '100'. Of course, the applied offset value is subject to change in accordance with the system environment and / or user setting.

MSs receiving a DCD message from the first BS 220 can receive the primary control CID only with the reception of the base CID by obtaining the offset value included in the broadcast DCD message. Regarding the offset value, since the same value is set for each BS, the first BS 220 and the second BS 230 have the same offset value.

At step 213, upon receipt of the DCD message, the MS 210 transmits a ranking request message (RNG-REQ) to the first BS 220. MS 110 delivers basic call connection information to the first BS 220 via an RNG-REQ message.

At step 215, the first BS 220 transmits a ranking response message (RNG-RSP) to the MS 210 in response to the RNG-REQ message. In this case, the first BS 220, together with the RNG-RSP message, transmits to the MS 210 a basic CID for transmitting / receiving control signals for initial access. For example, it is assumed that the base CID is '10'. The MS 210 performs synchronization obtaining and transmit power control operations with the first BS 220 by performing a ranking operation according to steps 213-215.

At step 217, the MS 210 transmits to the first BS 220 a message (SBC-REQ) of a subscriber station core capability request for matching core capabilities with the first BS 220. The SBC-REQ message includes information regarding a modulation scheme and / or coding scheme available to the MS 210.

In step 219, the first BS 220 transmits to the MS 210 a message (SBC-RSP) of the subscriber's basic capabilities response in response to the SBC-REQ message. In this case, the first BS 220 checks the information included in the SBC-REQ message regarding the modulation scheme and / or coding scheme available for the MS 210.

The SBC-REQ message and the SBC-RSP message are a type of medium access control (MAC) message that the MS 210 transmits / receives to negotiate basic capabilities with the first BS 220.

Although not shown in FIG. 2, the MS 210 may perform an operating procedure to transmit a privacy key management request message (PKM-REQ) for exchanging authentication keys after completing the core negotiation procedure with the first BS 220, and receive the message (PKM-RSP) a privacy key management response in response to a PKM-REQ message. The PKM-REQ message and the PKM-RSP message are a MAC message, and the PKM-REQ message includes unique information (or certificate) regarding the MS 210. The first BS 220 receives the unique information of the MS 210 from the received PKM-REQ message, and authenticates with the authentication server (AS; not shown) using unique information. The first BS 220 authenticates to the MS 210 through a PKM-REQ message, and if the MS 210 is an authenticated MS, it receives a PKM-RSP message. The PKM-RSP message comprises the authentication key (AK) and the traffic encryption key (TEK) assigned to the MS 210.

After completing the core capabilities matching procedure, the MS 210, at 221, transmits a registration request message to the first BS 220.

Upon receipt of the REG-REQ message, the first BS 220 detects the registration information regarding the MS 210 included in the REG-REQ message, thereby registering the MS 210 in the first BS 220.

At step 223, the first BS 220 transmits a registration response message (REG-RSP) with the registration information MS 210 registered in response to receiving the REG-REQ message. In this case, the first BS 220, together with the RNG-RSP message, transmits a primary control CID to the MS 210 to transmit / receive control signals for initial access. For example, it is believed that the CID value of the primary control will be '110'.

If the offset value is included in the DCD message, the MS 210 can obtain the base CID by applying the offset value to the CID value of the primary control, although the base CID value is not transmitted along with the REG-RSP message.

Even if the MS 210 takes an offset value, it can be assigned a base CID value from the first BS 220.

In step 225, the MS 210, to which both the base CID and the primary control CID have been assigned, establishes a connection with the first BS 220 using the base CID (= 10) and the primary control CID (= 110). For MS 210, a transport CID may be additionally assigned to exchange user data with the first BS 220. Since the assignment of transport CID is outside the scope of the present invention, a detailed description thereof will be omitted herein.

If the MS 210 determines the need to transfer its service, the MS 210 in step 227 transmits a handover request message (HO-REQ) to the first BS 220. The MS 210 can determine the need for handover using signal strength, signal-to-noise ratio (SNR), and signal-to-noise-to-noise ratio (SINR) for the BS.

At step 229, the first BS 220 receives the base CID to be used in the target BS (i.e., the second BS 230), to which the MS 210 will perform handover by exchanging basic messages with the second BS 230. That is, the first BS 220 may receive from the second BS 230 is the basic CID for the MS 210, which is planned for handover. For example, it is believed that the base CID received through the base message will be '30'.

In step 231, upon receiving the base CID, the first BS 220 transmits a handover response message (HO-RSP) to the MS 210 in response to the HO-REQ message. The HO-RSP message includes information on a second BS 230 to which the MS 210 will perform handover. In this case, the first BS 220 includes in the HO-RSP message at least one of the base CID and the primary control CID, and transmits the message to the MS 210. For example, it is assumed that the base CID '30' is included in the HO-RSP message. If information on more than two BS candidates available as the target handover BS is included in the HO-RSP message, it includes the base CID or CID of the primary control that the corresponding MS will use in the BS candidates.

For example, it is assumed that the first BS 220 receives the base CID. In this case, if the number of BS candidates is, for example, 3, then since the MS 210 needs to separate the base CIDs for the BS candidates, 3 base CIDs assigned from the BS candidates are included in the HO-RSP message.

Table 2 shows an example of the pre-assignment (pre-allocation) of the base CID included in the HO-RSP message for assigning the base CID.

table 2 Name Type (1 byte) Length
(1 byte) Value
((2 * Number of basic CID) bytes) Scope Preliminary distribution of basic CID Nnn 2 * Number of base CIDs List of basic CIDs (1 per BS) to be used in BS candidates listed in HO-RSP HO-RSP

Table 2 shows that the destination CID destination information is inserted in the type-length-value (TLV) format of the HO-RSP message, and a list of base CIDs for each candidate BS is included in the value field.

As for the preliminary assignment information of the basic CID, the first BS 220 may transmit it to the MS 210 in the form of a separate message.

Upon receipt of the HO-RSP message, the MS 210 in step 233, based on the information included in the HO-RSP message, determines whether to perform a handover to the second BS 230. If the MS 210 decides to perform a handover to the second BS 230, it transfers to the first A BS 220 handover indication message (HO-IND) indicating that it will shortly perform a handover to the second BS 230. When deciding to handoff to the second BS 230, the MS 210 receives the CID of the primary control (130 = 30 + 100) using the value (= 30) of the underlying CI D the second BS 230 included in the HO-RSP message, and the primary control CID offset value (= 100) included in the DCD message, and updates the CID of the base CID '30' and the primary control CID '130'.

Although the BS serving the MS 210 (i.e., the first BS 220) defines a second BS 230 to which the MS 210 will perform a handover, here, as an example, the MS 210 may also determine a second BS 230 to which it will execute handover. When the MS 210 determines the second BS 230 as the BS to which it will perform the handover, the MS 210 determines the second BS 230 as the target handover BS, includes information on the determined second BS 230 in the HO-REQ message, and transmits it to the first BS 220.

After transmitting the HO-IND message to the first BS 220, the MS 210 in step 235 transmits the RNG-REQ message to the target handover BS (i.e., the second BS 230).

In step 237, the MS 210 establishes a connection with the second BS 230 using the updated base CID and CID of the primary control for the second BS 230. The second BS 230 may exchange its control data, or its control signals, during the establishment of the connection. For example, the base CID is '15', and the CID value of the primary control is '130'. After updating the base CID and CID of the primary control, the MS 210 exchanges control data, or control signals, with the second BS 230 and can then exchange its user data by assigning a transport CID. Since the purpose of the transport CID is outside the scope of the present invention, a detailed description of this is omitted.

If the MS does not access the new BS, then both the MS and the BS having the assigned primary CID and primary management CID release the assignment of the basic CID and primary management CID that have been previously assigned. In this case, the BS and each MS share a timer value to automatically release the assignment of the base CID and primary control CID, and Table 3 illustrates such a timer.

Table 3 Name Value (ms) Minimum Maximum Scope Pre-Distributed CID Release Timer The base CID and primary management CID that the target BS previously assigned to the MS via the HO-RSP message during the handover are released after a predetermined time has elapsed if the MS does not access the corresponding target BS 40 ms 100 ms BS, MS

Table 3 shows the time delay value for releasing the pre-assigned CID. The timer is shared between BS and MS, and the minimum 'min' value and the maximum 'max' value for the timer value are set, for example, to 40 ms and 100 ms, respectively. Therefore, the BS and MS communication systems according to the present invention may each comprise a timer in which the aforementioned time values are set.

As described above, when the handover occurs, the MS before the handover pre-performs the procedure of assigning the base CID and CID of the primary control in the former serving BS. Therefore, when the handover actually occurs, it is possible to minimize the data transfer delay time even without assigning a base CID and a primary control CID from the target handover BS. In addition, during a handover according to the present invention, primary control CIDs are obtained by receiving only the basic CID, or basic CIDs are received by receiving only the primary control CID, which helps to reduce data transmission / reception costs compared to the conventional method in which the base is assigned to the MS CID and CID of primary management.

Then, a second embodiment of the present invention provides a method in which the MS and the BS designate and manage the primary control CID and the transport CID using the base CID.

First, the MS and the BS each obtain the primary control CID using the set primary control CID (i.e., the set value for the primary control CID) and the base CID. In this case, with regard to the basic CID, the basic CID is assigned to the MS by the BS with which it is currently communicating. For example, the MS transmits an RNG-REQ message to the BS to request the assignment of the base CID, and receives the assigned base CID from the BS via the RNG-RSP message in response to the RNG-REQ message.

The primary control CID set value, which is a predefined value for each BS, uses the 'm' included in Table 1. The MS can receive the primary control CID set value from the BS, for example, via a DCD message, an RNG-RSP message, or a message (MOB_NBR-ADV) "Notification of the characteristics of the neighboring BS". In this case, the set primary control CID value may be the same value or a different value for each BS.

Specifically, the MSs and the BSs each obtain the primary control CID using the base CID and the set primary control CID value, as shown in Equation 2.

Primary Management CID = Base CID + m. (Lv. 2)

That is, as shown in Equation 2, the primary control CID is obtained by adding the set primary control CID to the base CID.

Finally, a third embodiment of the present invention is a scheme in which MS and BS each obtain a transport CID using a base CID and a predetermined set value of the transport CID. For example, it is believed that the set transport CID value is 'a'. The set transport CID value is a value predetermined for each BS. The MS receives the set transport CID value from the BS through, for example, a DCD message, an RNG-RSP message, or a MOB_NBR-ADV message. Alternatively, the set transport CID value for each BS may be either the same value or a different value.

Specifically, the MS and the BS each obtain a range of values for assigning the transport CID using the base CID and the set value of the transport CID, as shown in Equation 3.

Range of transport CID values = from {(2m + 1) + (basic CID - 1) * a} to {2m + basic CID * a}, (Lv. 3)

where 'm' denotes the offset value, and 'a' denotes the set transport CID value (i.e., the number of transport CIDs that the first BS reserved so that they are continuously assigned to the MS). Here, 'a' is a value that each BS can set arbitrarily. The transport CID is assigned to the transport connection based one after another. The values 'm' and 'a' are information that is to be transmitted from the BS to the MS. Therefore, the BS to which the base CID is assigned, and the MS to which the base CID is assigned, each can receive a primary control CID and an available range for assigning a transport CID by receiving 'm' and 'a'.

For example, it is believed that the transport CID that the MS assigned from the former BS is 5. BS and MS each sequentially determine the order of the transport CIDs according to their size. Specifically, the MS obtains the first transport CID using {(2m + 1) + (base CID - 1) * a}, within the range of transport CID values obtained by Equation 2. After that, the MS sequentially receives the transport CID for each connection in accordance with a predefined sequence, starting from the first transport CID, within the range of transport CID values obtained according to Equation 2.

When the secondary control CID is additionally assigned in the obtained range of transport CID values, the first CID (i.e., the CID with the smallest number in the obtained range of transport CID values) is reserved to preferably be used as the secondary control CID, and other transport CIDs may be used CID starting at the second CID. Conversely, the CID with the highest number is reserved to preferably be used as a secondary control CID, and other CIDs can be used as transport CIDs, starting with the second largest CID.

Using this method, the BS and MS can each receive the primary control CID and the transport CID even without a message transmission / reception procedure based on the purpose of the transport CIDs. Regarding transport CIDs, it is possible to sort transport CIDs in ascending or descending order and sequentially assign sorted transport CIDs as new CIDs within the range of transport CID values.

3 is a signaling diagram illustrating a CID control operation in a communication system according to a second embodiment of the present invention. In the following description, given by way of example, the secondary control CID is further assigned in the range of transport CID values.

3, the communication system includes an MS 310, a first BS 320, and a second BS 330. It is believed that the first BS 320 is a serving BS that currently provides communication services on the MS 310, and the second BS 330 is a target BS. into which the MS 310 will perform a handover.

At step 311, the first BS 320 transmits the first DCD message to the MS 310.

The first DCD message is a broadcast message broadcast by the first BS 320.

The first DCD message includes the primary control CID set value 'm' and the transport CID set value 'a'. MS 310 obtains a primary control CID and a range of values for assigning a transport CID using 'm' and 'a' according to Equation 2 and Equation 3, respectively. In this case, it is assumed that 'm' will be '300', and it is assumed that 'a' will be '40'.

At step 313, upon receiving the first DCD message, the MS 310 transmits to the first BS 320 a first RNG-REQ message including basic information for the call connection.

At step 315, the first BS 320 transmits the first RNG-RSP message to the MS 310 in response to the first RNG-REQ message. The first RNG-REQ message includes the base CID, which the first BS 320 assigned to MS 310, and for example, it is believed that the base CID will be '10'.

That is, the first BS 320 obtains the primary control CID using 'm' when assigning the base CID for the MS 310, and upon receiving the base CID from the first BS 320, the MS 310 also receives the primary control CID using the 'm'. Specifically, according to Equation 2, the first BS 320 and MS 310 each receive a primary control CID corresponding to '310' (10 (base CID) + 300 (m)).

The MS 310 and the first BS 320, once they receive the primary control CID, can mutually exchange control signals for initial access. In this case, the base CID received by the MS 310 and the first BS 320 is '10', and the primary control CID value is '310'.

In steps 313-315, the MS 310 performs a ranking operation (that is, the operations of acquiring synchronization and transmit power control) from the first BS 320. After receiving the basic CID and CID of the primary control by the above procedure, the MS 310 establishes a connection with the first BS 320 using the basic CID (= 10) and CID (= 310) of the primary control.

At step 317, the MS 310 transmits an SBC-REQ message to the first BS 320 to agree on the basic capabilities between the first BS 320 and the MS 310. For example, the SBC-REQ message includes information regarding the modulation scheme and / or coding scheme available for the MS 310.

At step 319, upon receipt of an SBC-REQ message from MS 310, the first BS 320 transmits an SBC-RSP message to MS 310 in response to the SBC-REQ message. The SBC-REQ message includes information regarding the modulation scheme and / or coding scheme available for the MS 310. The SBC-REQ message and the SBC-RSP message are a kind of MAC message that the MS 310 transmits / receives to match basic capabilities with the first BS 320 .

At 321, the MS 310 transmits a first REG-REQ message including its registration information to the first BS 320. Upon receiving the first REG-REQ message, the first BS 320 detects the registration information of the MS and registers the MS 310 in the first BS 320.

At 323, upon receiving the first REG-REQ message, the first BS 320 transmits the first REG-RSP message to the MS 310. The first REG-RSP message includes registration information of the registered MS.

At step 325, the MS 310 transmits to the first BS 320 a first message (DSA-REQ) of a dynamic service add request (creation of a new data service flow). At step 327, upon receiving the first DSA-REQ message, the first BS 320 transmits to the MS 310 a first dynamic service add response message (DSA-RSP). In this case, the first BS 320 and MS 310 each receive the first transport CID to be assigned to MS 310 according to Equation 3. That is, if the m = 300 and a = 40 obtained in step 311 are applied to Equation 3, it is possible to obtain a range of values for assignment transport CID from '961 ((2 * 300 (m) + 1) + (10 (base CID) - 1) * 40 (a))' to '1000 ((2 * 300 (m)) + 10 (base CID ) * 40 (a)) '. The MS 310 and the second BS 330 each obtain a range for assigning a transport CID corresponding to '961-1000', and assigns the CID with the lowest number '961' from the range of transport CID values as the first transport CID.

At 329, the MS 310 transmits a second DSA-REQ message to the first BS 320. The second DSA-REQ message includes information for transmitting / receiving user data, that is, information for executing a transport CID request, and this transport CID request is a transport CID request for transmission different from that of service connection step 325.

In step 331, upon receiving the second DSA-REQ message, the first BS 320 transmits the second DSA-RSP message to the MS 310. In this case, the first BS 320 and MS 310 each assign the next value 962 as the second transport CID relative to the first transport CID 961 from the range of transport CID values obtained in step 327.

The DSA-REQ message and the DSA-RSP message are messages exchanged between the BS and the MS 310 when the MS 310 establishes a new service connection with the BS.

At step 333, the second BS 330 transmits the second DCD message to the MS in the cell (s) of the second BS 330, or to a neighboring BS (for example, the first BS 320). The second DCD message is a broadcast message broadcast by the second BS 330, and it includes the primary control CID set value 'm' and the transport CID set value 'a' like the first DCD message. MS 310 may obtain a primary control CID and a range of values for assigning a transport CID using the 'm' and 'a' included in the second DCD message. In this case, it is assumed that 'm' will be '300', and it is assumed that 'a' will be '5'.

Although the above-described second DCD message is given here as an example for transmitting / receiving 'm' and 'a', the second BS 330 may generate another message or a separate message and transmit it to the first BS 320 or MS 310.

At step 335, upon receiving the second DCD message, the first BS 320 transmits the MOB_NBR-ADV message to the MS 310 along with the second DCD message. The MOB_NBR-ADV message, although it includes, for example, a second DCD message, may further include DCD messages from BSs other than the second BS 330.

At step 337, when detecting the need to transfer its service, the MS 310 transmits a HO-REQ message to the first BS 320.

At step 339, upon receiving the HO-REQ message, the first BS 320 transmits the HO-RSP message to the MS 310 in response to the HO-REQ message. The HO-RSP message includes information regarding the target BS (e.g., the second BS 330) to which the MS 310 will perform handover.

Upon receipt of the HO-RSP message, the MS 310, based on the information included in the HO-RSP message, determines whether it will perform the handover to the second BS 330. If the MS 310 decides to perform the handover to the second BS 330, it is at 341 transmits a HO-IND message to the first BS 320 indicating that it will soon be transferring service to the second BS 330. The HO-IND message may further include transport CIDs, for example, '961' and '962', which the MS 310 uses with first BS 320.

Upon receipt of the HO-IND message in step 341, the first BS 320 in step 342 transmits an MS service message to the second BS 330. The MS service information message includes transport CIDs, for example, '961' and '962' used by the MS 310. Also, the MS 310 can include the MS service information message in the RNG-REQ message and transmit it to the second BS 330.

After transmitting the HO-IND message to the first BS 320, the MS 310, in step 343, transmits a second RNG-REQ message to the target handover BS (i.e., the second BS 330). The second RNG-REQ message includes basic information for the call connection.

At step 345, the second BS 330 transmits the second RNG-RSP message to the MS 310 in response to the second RNG-REQ message. The second RNG-REQ message includes a base CID, which the second BS 330 assigned to MS 310. Here, it is assumed that the base CID will be '15'.

The second BS 330, if it assigns a base CID for the MS 310, obtains the primary control CID using 'm' for the second BS 330 received in the MOB_NBR-ADV message. Similarly, upon receiving the base CID from the BS, the MS 310 also obtains the primary control CID using 'm'. That is, the second BS 330 and MS 310 each receive a primary control CID of '315 (15 (base CID) + 300 (m))' using Equation 2. MS 310 and the second BS 330, as soon as they receive the primary control CID, can perform exchange of control signals with each other for initial access. For example, it is believed that the base CID will be '15', and it is believed that the primary management CID will be '315'.

In steps 343-345, the MS 310 performs a ranking operation (that is, the operations of acquiring synchronization and transmit power control) from the second BS 330. The MS 310, which has been assigned a basic CID and a CID of the primary control, establishes a connection with the second BS 330 using the basic CID (= 15) and the primary management CID (= 315).

As described above, the MS 310 and the second BS 330 can receive the primary control CID using only the base CID transmit / receive procedure without performing a separate transmit / receive procedure for the primary control CID. If the value 'a' is used for the second BS 330 obtained from the MOB-NBR-ADV message, the MS 310 and the second BS 330 can calculate the range for assigning the transport CID necessary to directly select the CID of the new connection to be used in the second BS 330, on which can be updated by the CID of the connection used in the first BS 320. MS 310 and second BS 330 each can receive a range of values for assigning a transport CID from '1301 ((2 * 300 (m) + 1) + (15 (basic CID) - 1) * 50 (a)) 'up to' 1350 ((2 * 3000 (m)) + 15 (base CID) * 50 (a)) 'in accordance with Equation 2, using' a '.

The MS 310 and the second BS 330 each can obtain a range of values for assigning a transport CID corresponding to '1301-1350' and reserve the CID with the lowest number '1301' from the range of transport CID values for assigning a secondary control CID for MS 310. If '1301' reserved, then CID values other than '1301' are assigned as transport CIDs starting from the next number '1302'.

Therefore, the first transport CID '961' that MS 310 previously used is updated with the value '1302', and the second transport CID '962' that MS 310 previously used is updated with the value '1303'. The MS 310 and the second BS 330 each sequentially assign transport CIDs in the range of transport CID values in the order of the transport CIDs with lower values. As a result, the MS 310 and the second BS 330 do not need to exchange transport CIDs with each other to update the transport CID.

In the foregoing description, it is assumed that the second BS 330 uses all transport CIDs by which the MS 310 is connected to the first BS 320. However, the second BS 330, using the previous method, can only reset (i.e. update) a portion of the transport CIDs, with by which the MS 310 is connected to the first BS 320.

The second BS 330 may transmit the following CID update indication information to selectively update transport CIDs for the MS 310, and the CID update indication information is shown in Table 4.

Table 4 Name Type of
(1 byte) Length (bytes) Value Scope Specify CID Update XX Variable Bitmap RNG-RSP, REG-RSP

As for Table 4, the type field, which is, for example, 1 byte, uses an arbitrary value to indicate an indication of a CID update.

The length field is used to indicate the length of the value field, and may be set to an arbitrary value or may have a variable value.

The "value" field is generated in the bitmap format and transmitted to the MS 310 via the second BS 330. The value field contains transport CID information for updated transport CIDs and non-renewable transport CIDs from among the transport CIDs used by MS 310, and information regarding non-renewable transport CIDs CID includes a bitmap or bitmap format of rejected transport CIDs indicating transport CIDs that are not allowed by the second BS 330 for MS 310. For example, assuming that the value included in the value field is '11101101', about o indicates that among the CID values of the connections that MS 310 used in the first BS 320, CID values using the first, second, third, fifth, sixth and eighth lowest numbers as their transport CID values will be updated sequentially as new CIDs whereas CID values using the fourth and seventh lowest numbers will not be updated as new CIDs. Although CID updating was done here, as an example, for CID values in order of decreasing transport CID values, CID updating can also be performed in order of increasing transport CID values.

CID update indication information may be included, for example, in an RNG-RSP message or a REG-RSP message.

Although the second BS 330 in this case inserts the CID update indication information in the type-length-value format, as an example, the CID update indication information may be generated in the form of a separate message, and then transmitted to the MS 310.

If the second BS 330 uses the CID update indication information, the CID update indication information may be transmitted in the RNG-RSP message at step 345.

Thus, the second BS 330 selects the CID values or transport CIDs that will undergo CID updating. When the second BS 330 updates relative to the selected transport CIDs, it can, for example, re-sort the selected CIDs and update the transport CIDs within the range of transport CID values.

Meanwhile, the second BS 330 may release connections for transport CIDs that have not undergone the transport CID update of the present invention.

MS 310, for example, includes in the REG-REQ message information regarding transport CIDs that have not been updated with the transport CID reported from the second BS 330, and then transmits a REG-REQ message to the second BS 330. MS 310 may receive, from the second BS 330, updated new transport CID information, for example, via a REG-RSP message. Therefore, for transport CIDs not selected by the second BS 330, the MS 310 receives the new transport CIDs updated by the second BS 330 and uses them to establish a connection with the second BS 330.

At step 347, the MS 310 transmits a second REG-REQ message including its registration information to the second BS 330. After that, upon receiving the second REG-REQ message, the second BS 330 detects the MS registration information and registers the MS 310 with the second BS 330.

At 349, upon receiving the second REG-REQ message, the second BS 330 transmits the second REG-RSP message to the MS 310. The second REG-RSP message includes registration information regarding the registered MS 310.

In this case, the second REG-RSP message does not need to include information for the individual assignment of the transport CID. In addition, the BSs and the MSs obtain the primary management CID and the transport CID, exchanging only the base CID, thereby enabling the establishment of a connection between the BS and the MS for each service connection.

4 is a block diagram illustrating a structure of a BS according to a preferred embodiment of the present invention.

4, the BS 400 includes a CID update message generator 402, a CID assignment unit 404, and a transmitter 406.

The CID update message generator 402 generates a CID update message containing a bitmap indicating transport CIDs allowed by the BS for the MS, and also including a rejected transport CID bitmap format indicating transport CIDs that are not allowed by the BS for the MS, and delivers it ( message) to the transmitter 406.

Upon receiving a connection request from the MS, the CID assignment unit 404 assigns a base CID for the MS, and computes the primary control CID using Equation 2. Additionally, the CID assignment unit 404 obtains a range of transport CID assignment values for the MS using Equation 3, and sequentially assigns a transport CID corresponding to the MS connection request.

After that, the transmitter 406 includes the base CID, the offset value, and the set transport CID value received from the CID assignment unit 404 in their respective messages in accordance with the procedure of FIG. 2, and transmits them to the MS.

5 is a block diagram illustrating an MS structure according to a preferred embodiment of the present invention.

5, the MS 500 includes a receiver 502, a transmitter 504, and a CID calculation unit 506.

Receiver 502 receives messages from the BS corresponding to the procedure of FIG. 2. All received messages comprise a base CID, an offset value, and a set transport CID value, and the receiver 502 supplies the CID values to the calculation unit 506. Then, the CID calculation unit 506 calculates the primary control CID and the transport CID for each connection using the offset value and / or the set value of the transport CID according to the equations Equation 1 - Equation 3. The transmitter 504 transmits a base CID assignment request to the BS.

As is apparent from the foregoing description, in the communication system of the present invention, since the MS preliminarily performs the assignment of the base CID and the primary control CID in the former serving BS before transferring its service, the target BS enables the transmission / reception of data even without performing a separate assignment of the base CID and the CID of the primary control during handover, helping to reduce the time delay caused by updating the CID. In addition, according to the present invention, it is possible to obtain both a basic CID and a primary management CID based on any one of the basic CID and primary management CID, thereby helping to reduce messaging overhead.

Additionally, according to the present invention, each MS can generate a primary control CID and a range of transport CID values using the set transport CID value in addition to the base (in the form of addition) CID and the set primary control CID value. Therefore, the BS and MS can receive the primary control CID and the transport CID even when exchanging only the base CID, and exchange messages using the received CIDs, thereby reducing the load on messages transmitted for CID assignment. That is, since the MS and the BS share the values predetermined between them, they can automatically receive the transport CID using only the base CID.

Although the present disclosure of an object of the invention has been described using exemplary embodiments, various changes and modifications may be suggested by a person skilled in the art. It is intended that the present disclosure cover all such changes and modifications if they fall within the scope of the appended claims.

Claims (56)

1. A method for managing connection identifiers (CIDs) of a mobile station (MS) in a communication system, comprising the steps of:
transmitting a downlink message including a predetermined value intended for use to determine a primary control CID for the MS; and
determine the primary management CID for the MS by adding the setpoint to the base CID for the MS. 2. The method of claim 1, wherein the downlink message is a downlink channel descriptor (DCD) message. 3. The method according to claim 1, in which the set value indicates the maximum value of the number of base CID values assigned by the base station (BS). 4. The method according to claim 1, further comprising stages in which:
receiving a ranking request message (RNG-REQ) from the MS; and
transmit to the MS a ranking response message (RNG-RSP) including a base CID. 5. The method according to claim 1, further comprising stages in which:
receiving a handover request message (HO-REQ) from the MS;
and
transmit to the MS a handover response message (HO-RSP) including information about the target BS and a base CID for using the target BS,
moreover, the new primary control CID intended to use the target BS is determined by adding the set value to the base CID intended to use the target BS. 6. The method according to claim 1, additionally containing phase, in which:
determining at least one transport CID for the MS based on the base CID and the additional setpoint contained in the downlink message, the additional setpoint being the number of transport CIDs that the BS has reserved for the MS. 7. A method for managing connection identifiers (CIDs) of a mobile station (MS) in a communication system, comprising the steps of:
receiving a downlink message including a predetermined value intended for use to determine a primary control CID for the MS; and
determine the primary management CID for the MS by adding the setpoint to the base CID for the MS. 8. The method of claim 7, wherein the downlink message is a downlink channel descriptor (DCD) message. 9. The method according to claim 7, in which the set value indicates the maximum value of the number of base CID values assigned by the base station (BS). 10. The method according to claim 7, further comprising stages in which:
transmit a ranking request message (RNG-REQ) to the BS; and
receive from the BS a ranking response message (RNG-RSP) including a base CID. 11. The method according to claim 7, further comprising stages in which:
transmit a handover request message (HO-REQ) to the BS; and
receive from the BS a handover response message (HO-RSP) including information about a target BS and a base CID for using the target BS,
moreover, the new primary control CID intended to use the target BS is determined by adding the set value to the base CID intended to use the target BS. 12. The method according to claim 7, additionally containing a stage in which:
determining at least one transport CID for the MS based on the base CID and the additional setpoint contained in the downlink message, the additional setpoint being the number of transport CIDs that the BS has reserved for the MS. 13. A device for managing connection identifiers (CIDs) of a mobile station (MS) in a base station (BS) in a communication system, comprising:
a transmitter configured to transmit a downlink message including a predetermined value for use to determine a primary control CID for the MS; and
a CID assignment unit configured to determine a primary control CID for the MS by adding the set value to the base CID for the MS. 14. The apparatus of claim 13, wherein the downlink message is a downlink channel descriptor (DCD) message. 15. The device according to item 13, in which the set value indicates the maximum value of the number of base CID values assigned by the base station (BS). 16. The device according to item 13, in which the transmitter is configured to transmit to the MS a ranking response message (RNG-RSP) including a basic CID after receiving a ranking request message (RNG-REQ) from the MS. 17. The device according to item 13, in which the transmitter is configured to transmit to the MS a handover response message (HO-RSP) including information about a target BS and a base CID for using a target BS after receiving a handover request message (HO-REQ) from MS;
moreover, the new primary control CID intended to use the target BS is determined by adding the set value to the base CID intended to use the target BS. 18. The device according to item 13, in which the destination module CID is configured to determine at least one transport CID for the MS based on the base CID and the additional set value contained in the message downlink, and the additional set value is the number of transport CID that BS has reserved for MS. 19. A device for managing connection identifiers (CIDs) of a mobile station (MS) in a mobile station in a communication system, comprising:
a receiver configured to receive a downlink message including a predetermined value for use to determine a primary control CID for the MS; and
a CID calculation module, configured to determine the primary control CID for the MS by adding the set value to the base CID for the MS. 20. The device according to claim 19, in which the message downlink is a message descriptor channel downlink (DCD). 21. The device according to claim 19, in which the set value indicates the maximum value of the number of base CID values assigned by the base station (BS). 22. The device according to claim 19, in which the receiver is configured to receive a ranking response message (RNG-RSP) including a basic CID from the BS after the ranking request message (RNG-REQ) is transmitted to the BS. 23. The device according to claim 19, in which the receiver is configured to receive a Handover Response (HO-RSP) message from the BS, including information about the target BS and a base CID for using the target BS after the BS is transmitted Handover Request Message (HO-REQ),
moreover, the new primary control CID intended to use the target BS is determined by adding the set value to the base CID intended to use the target BS. 24. The device according to claim 19, in which the CID calculation module is configured to determine at least one transport CID for the MS based on the base CID and the additional preset value contained in the downlink message, the additional preset value being the number of transport CID that BS has reserved for MS. 25. A method for managing connection identifiers (CIDs) of a mobile station (MS) in a communication system, comprising the steps of:
transmitting a downlink message including a first setpoint and a second setpoint that are intended to be used to determine transport CIDs assigned to the MS;
determining a range for transport CIDs based on the base CID assigned to the MS and the first and second setpoints; and
determining at least one transport CID for the MS within a certain range. 26. The method of claim 25, wherein the downlink message is a downlink channel descriptor (DCD) message. 27. The method of claim 25, wherein the first predetermined value indicates a maximum value among the base CID values assigned by the base station (BS), and the second predetermined value indicates the number of transport CIDs that the BS has reserved for each MS. 28. The method according A.25, in which the step of determining at least one transport CID comprises the step of updating at least one transport CID for the MS in ascending order within a certain range. 29. The method according A.25, in which the first transport CID of the number of transport CID assigned to the MS is determined using the following equation
first transport CID = {(2m + 1) + (Basic CID-1) * a},
where 'm' denotes a first predetermined value, and 'a' denotes a second predetermined value. 30. The method according A.25, in which the range for the transport CID assigned to the MS is determined using the following equation
transport CID range = from {(2m + 1) + (Basic CID-1) * a} to {2m + Basic CID * a},
where 'm' denotes a first predetermined value and 'a' denotes a second predetermined value. 31. The method according A.25, optionally containing phase in which:
transmit to the MS information about at least one transport CID that is not received by the base station (BS). 32. The method of claim 31, wherein said information comprises a bitmap indicating at least one transport CID that is not received by the BS from among the transport CIDs assigned to the MS. 33. A method for managing connection identifiers (CIDs) of a mobile station (MS) in a communication system, comprising the steps of:
receiving a downlink message including a first setpoint and a second setpoint that are intended to be used to determine transport CIDs assigned to the MS;
determining a range for transport CIDs based on the base CID assigned to the MS and the first and second setpoints; and
determining at least one transport CID for the MS within a certain range. 34. The method of claim 33, wherein the downlink message is a downlink channel descriptor (DCD) message. 35. The method of claim 33, wherein the first setpoint indicates a maximum value among the base CID values assigned by the base station (BS), and the second setpoint indicates the number of transport CIDs that the BS has reserved for each MS. 36. The method according to p, in which the step of determining at least one transport CID comprises the step of updating at least one transport CID for the MS in ascending order within a certain range. 37. The method according to p, in which the first transport CID of the number of transport CID assigned to the MS is determined using the following equation
first transport CID = {(2m + 1) + (Basic CID-1) * a},
where 'm' denotes a first predetermined value, and 'a' denotes a second predetermined value. 38. The method according to p, in which the range for the transport CID assigned to the MS, is determined using the following equation
transport CID range = from {(2m + 1) + (Basic CID-1) * a} to {2m + Basic CID * a},
where 'm' denotes a first predetermined value and 'a' denotes a second predetermined value. 39. The method of claim 33, further comprising the step of:
receive from the base station (BS) information about at least one transport CID that is not received by the BS. 40. The method of claim 39, wherein said information comprises a bitmap indicating at least one transport CID that is not received by the BS from among the transport CIDs assigned to the MS. 41. A device for managing connection identifiers (CIDs) of a mobile station (MS) in a base station (BS) in a communication system, comprising:
a transmitter configured to transmit a downlink message including a first predetermined value and a second predetermined value, which are used to determine transport CIDs assigned to the MS; and
a CID assignment unit configured to determine a range for transport CIDs based on a base CID assigned to an MS and first and second setpoints and determine at least one transport CID for an MS within a certain range. 42. The device according to paragraph 41, in which the message downlink is a message descriptor channel downlink (DCD). 43. The device according to paragraph 41, in which the first set value indicates the maximum value among the base CID values assigned by the base station (BS), and the second set value indicates the number of transport CIDs that the BS has reserved for each MS. 44. The device according to paragraph 41, in which the destination module CID is configured to update at least one transport CID for the MS in ascending order within a certain range. 45. The device according to paragraph 41, in which the first transport CID of the number of transport CID assigned to the MS is determined using the following equation
first transport CID = {(2m + 1) + (Basic CID-1) * a},
where 'm' denotes a first predetermined value, and 'a' denotes a second predetermined value. 46. The device according to paragraph 41, in which the range of transport CID assigned to the MS is determined using the following equation
transport CID range = from {(2m + 1) + (Basic CID-1) * a} to {2m + Basic CID * a},
where 'm' denotes a first predetermined value, and 'a' denotes a second predetermined value. 47. The device according to paragraph 41, in which the transmitter is configured to transmit to the MS information about at least one transport CID that is not received by the base station (BS). 48. The device according to clause 47, in which said information contains a bitmap indicating at least one transport CID, which is not accepted by the BS, from among the transport CID assigned to the MS. 49. A device for managing connection identifiers (CIDs) of a mobile station (MS) in a mobile station in a communication system, comprising:
a receiver configured to receive a downlink message including a first predetermined value and a second predetermined value, which are used to determine transport CIDs assigned to the MS;
a CID calculation module configured to determine a range for transport CIDs based on a base CID assigned to the MS and first and second setpoints and determine at least one transport CID for the MS within a certain range. 50. The apparatus of claim 49, wherein the downlink message is a downlink channel descriptor (DCD) message. 51. The device according to § 49, in which the first setpoint indicates the maximum value from among the base CID values assigned by the base station (BS), and the second setpoint indicates the number of transport CIDs that the BS has reserved for each MS. 52. The device according to 49, in which the CID calculation module is configured to update at least one transport CID for the MS in ascending order within a certain range. 53. The device according to § 49, in which the first transport CID from among the transport CID assigned to the MS is determined using the following equation
first transport CID = {(2m + 1) + (Basic CID-1) * a},
where 'm' denotes a first predetermined value and 'a' denotes a second predetermined value. 54. The device according to § 49, in which the range of transport CID assigned to the MS is determined using the following equation
transport CID range = from {(2m + 1) + (Basic CID-1) * a} to {2m + Basic CID * a},
where 'm' denotes a first predetermined value and 'a' denotes a second predetermined value. 55. The device according to § 49, in which the receiver is configured to receive information from the base station (BS) about at least one transport CID that is not received by the base station (BS). 56. The apparatus of claim 55, wherein said information comprises a bitmap indicating at least one transport CID that is not received by the BS from among the transport CIDs assigned to the MS.

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