KR20070097978A - Mobile communicatio terminal and method for managing session - Google Patents

Abstract

A mobile terminal and a session management method are provided to prevent a waste of resources by using the same session information as a previous call for a mobile terminal which moves within an area belonging to an identical server, without allocating plural UATIs(Unicast Access Terminal Identifier) or session information for the mobile terminal. A hybrid mobile terminal, which supports a high-speed packet data service, comprises a communication part(100), a location information storage part(120), and a control part(110). The communication part(100) executes radio communication with a base station. The location information storage part(120) stores subnet information, received through the communication part(100), in connecting the previous call of the mobile terminal. In case the mobile terminal makes a call connection after moving to another subnet, the control part(110) decides whether to maintain existing session information, based on the present subnet information and the stored subnet information.

Description

Mobile Communicatio Terminal and Method for Managing Session

1 is a block diagram schematically showing the configuration of a mobile communication terminal according to an embodiment of the present invention;

2 is a flowchart schematically illustrating a session information management method according to an embodiment of the present invention;

3 is a flowchart illustrating a session establishment method performed between a mobile communication terminal and a communication network according to an exemplary embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

100: communication unit 102: first receiver

104: second receiver 110: control unit

120: location information storage unit

The present invention relates to a hybrid mobile communication terminal supporting a high speed packet data service, and more particularly, a hybrid supporting a high speed packet data service for establishing a session so that the server side managing the session information can be efficiently managed. The present invention relates to a mobile communication terminal and a method thereof.

Code Division Multiole Access (CDMA) 2000 1x service (hereinafter referred to as '1x only' service) uses the existing data communication speed of 14.4 Kbps using the IS-95C network evolved from the existing IS-95A and IS-95B networks. It is a service that enables wireless Internet up to 144Kbps faster than 56Kbps. Meanwhile, the 3rd Generation Partnership Projects (3GPPS), an international standardization organization for CDMA systems, is based on Qualcom's High Data Rate (HDR) as a method for high-speed packet transmission, based on CDMA 2000 1x EV-DO (Evolution). "Data Optimized" and confirmed as an international standard (hereinafter referred to as "EV-DO"). The EV-DO method defines an evolved method of transmitting data only in a 1x dedicated communication standard. Provides a bidirectional high speed data service with a transmission rate of.

Hybrid terminal is a mobile communication terminal that can use both the communication service provided to the EV-DO system and 1x dedicated system. In the hybrid operation mode, the hybrid terminal first performs initialization acquisition on the 1x system, acquires an EV-DO system matched together, and attempts to connect a session to the obtained EV-DO system.

The hybrid terminal communicates with the EV-DO system via a medium access control (MAC) protocol operating over the air-link protocol. The UATI is assigned an identifier for accessing the EV-DO network.

The hybrid terminal connects to the EV-DO network using the assigned UATI, opens a traffic channel, and attempts a session connection to use a high-speed data communication service between the EV-DO systems. Through the established connection, the access terminal uses services such as file transfer and web browsing. At this time, the service server stores all session information. In this case, two sessions are managed for the same terminal. Of course, this is not a problem if there are servers managing different sessions on different subnets. However, in Korea, as a service provider provides services to multiple regions, one server is configured to manage UATI allocation or session information across multiple regions. Therefore, even if the area belonging to another base station, it belongs to the same service provider to manage as one server.

In the case of performing the communication on the conventional system, even if the mobile station is moved within the area belonging to the same operator, for example, one mobile communication terminal disconnects after performing communication on Subnet A, and then moves to a nearby Subnet B and attempts to connect again. In this case, the UATI is newly allocated regardless of the communication history of the previous A subnet, and the session information is generated to establish the session. If area A and B belong to the same operator and are managed by the same server, the session information previously set up for one terminal is accumulated, so the server must store and manage them all. In addition, even in the UATI (Unicast Access Terminal Identifier) assignment problem, since two UATIs are allocated to one terminal, resources are unnecessarily wasted on a conventional system.

The present invention is derived from this background, and aims to prevent waste of resources in the 1x EV-DO service server.

Furthermore, an object of the present invention is to efficiently utilize session information allocated to one terminal.

In order to achieve the above object, a hybrid mobile communication terminal supporting a high speed packet data service according to an aspect of the present invention stores session information established for a previous call connection, and then moves back to another region. When attempting to access the call, if the area before / after the movement belongs to the same service provider, the session is set up while maintaining the session information set for the previous call.

According to the present invention according to this aspect of the present invention, for a mobile communication terminal moving in an area belonging to the same server, the operator managing the server by using the same session information and unicast access terminal identifier (UATI) as in the previous call. From the standpoint, the session information can be managed efficiently.

The foregoing and additional aspects of the invention are described in detail below to enable those skilled in the art to readily understand and reproduce through the embodiments described with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a configuration of a mobile communication terminal according to an embodiment of the present invention. As shown, the mobile communication terminal according to the present invention is a communication unit 100 for performing wireless communication with the base station, and the location information for storing the subnet information received through the communication 100 when the previous call connection of the mobile communication terminal The storage unit 120 and the control unit 110 determines whether to maintain the existing session information according to the received current subnet information and the stored subnet information of the previous call connection when the mobile terminal is connected to the call after moving the subnet. It includes.

The mobile communication terminal according to the present invention uses a voice communication service through an IS-95 / 1x network by integrating HDR technology supporting high-speed data communication by coexisting with voice and data communication through the existing IS-95 / 1x technology. It is desirable to be implemented as a hybrid phone designed to enable high-speed data communication services through the HDR network.

The communication unit 100 performs high speed data communication through a network in a known HDR system. In one embodiment, the communication unit 100 may be configured to include an antenna with the first receiver 102 and the second receiver 104, respectively. While the first receiver 102 is a conventional configuration that performs both transmission and reception of signals in a mobile communication terminal, the second receiver 104 is for receiving high-speed data up to 2.4 Mbps according to the IS 856 standard. Only the reception of the signal. The second receiver 104 exclusively performs the existing 1xEV-DO (Evolution-Data Only) operation. In the present embodiment, the communication unit 100 acquires the location information of the terminal even in an idle state and communicates with an access point to set up a UATI or a session.

The location information storage unit 120 may be embodied as a flash memory for storing various updatable data such as a phone book, an outgoing message, and a received message in a typical mobile communication terminal. In addition, the location information storage unit 120 may be configured as an EEPROM that allows a user to modify the contents in the memory. In the present embodiment, the location information storage unit 120 stores location information of the mobile communication terminal included in the overhead message received from the base station.

The controller 110 is a conventional mobile communication terminal, and most of the circuits of the controller 110 are provided as a single integrated circuit. This integrated circuit, commonly referred to as an MSM chip, includes dedicated hardware for processing communications therein, a digital signal processor and a general purpose microprocessor. Each part constituting the control unit 110 may be configured by dedicated hardware or software or a mixture thereof.

As described above, these components may be implemented by a program in the controller 110. In the present embodiment, the control unit 110 determines the current position of the mobile communication terminal from the information received through the communication unit 100. And it identifies the subnet (subnet) to which the mobile communication terminal belongs. When the subnet is changed, it checks the subnet to which the terminal belongs recently and the subnet to which the current terminal belongs and checks whether the two subnets belong to the same service provider. At this time, the controller 110 can determine the subnet to which the mobile communication terminal belongs from the base station information included in the overhead message transmitted from the base station.

In addition, if the current subnet is moved to the previous subnet and the current location belongs to the same provider, the session is not set up a new session, the session is set to the session information set for the previous call. On the other hand, if it does not belong to the same provider, it deletes the previous session information and requests to connect a new session. In one embodiment, the mobile communication terminal is the same country code included in the parameter message of the HDR system received from the base station, or whether the region belongs to the same operator based on information obtained from Latitude and Longitude, which are location information of the base station. Can be determined.

According to a characteristic aspect of the present invention, the control unit 110 transmits the UATI request message allocated when the previous call is connected when the session is established with the same session information as the previous call.

The controller 110 sets the transmit ATI to RATI when the session is set up when the session is established with the same session information as the previous call, or transmits the ATI to RATI when a new session is set up and transmits the EV through the newly allocated UATI. Connect to the DO network, open a traffic channel and negotiate a session. After the session negotiation, the terminal and the network have the same session information.

According to a characteristic aspect of the present invention, when setting a session with the same session information as the previous call, the controller 110 is configured to maintain the existing session information and assign a different session number to set the session.

The controller 110 transmits to the service system without deleting the existing session information when the session is set to the session information set for the previous call. The service system checks an existing session of the mobile communication terminal and allocates a session having the same characteristics as the existing session. That is, the session number is changed but the same session connection as the existing session information is performed.

Hereinafter, a session information management method according to the present invention will be described. 2 is a flowchart schematically illustrating a session information management method according to an embodiment of the present invention. In one embodiment, the management of session information according to the present invention is implemented by an access terminal device, such as a mobile communication terminal, and one or a plurality of organically cooperating programs executed in a microprocessor controlling the device.

According to an aspect of the present invention, there is provided a method of managing session information, when a call connection attempt is made, acquiring subnet information to which the current mobile communication terminal belongs, and obtaining subnet information to which the mobile terminal belongs at the time of a previous call connection from the stored information. And determining whether to maintain existing session information according to the subnet belonging to the previous call connection and the subnet to which the current mobile communication terminal belongs, and establishing a session according to the determination result.

As described above, in the access point of the high speed data communication system, UATI is allocated to each mobile communication terminal to distinguish each authenticated mobile communication terminal. The random access terminal identifier (Random ATI) is included in the UATI request message for the data service request and transmitted to the access point. In the mobile communication terminal, the UATI allocation request is transmitted to the SC / MM of the PCF via the access point. Then, the SC / MM allocates the UATI to the mobile communication terminal in response to the UATI request message of the mobile communication terminal, and the mobile communication terminal stores the allocated UATI in the storage 120. The UATI assignment request message used in the IS-856 wireless access standard includes an 8-bit message ID and an 8-bit transaction ID.

The access point is an access point that forms a wireless path directly with the mobile communication terminal for high speed data communication, and controls data transmission and reception with the mobile communication terminal. The access point may be installed separately from the BTS of the existing IS-95 / 1x network module or may be installed integrally with the multi-carrier BTS.

If there is a change in the corresponding subnet according to the location information (S200), the mobile terminal acquires information on the previous subnet and information on the subnet to which the current call should be attempted (S210).

In this embodiment, the mobile communication terminal can grasp the current location information by obtaining the location information of the base station to which it belongs.

In general, the mobile communication terminal detects the reception field sensitivity of neighboring base stations through the pilot channel when the initial power is applied, synchronizes the system using the sink channel to the base station having the largest reception field sensitivity, and then transmits terminal location registration and subscriber authentication request information. do. In this embodiment, the mobile communication terminal can determine information on the subnet to which it belongs by referring to information included in an overhead message periodically transmitted from the base station to the mobile communication terminal.

The overhead message is used by the mobile communication system to the mobile communication terminal for detailed information of the base station (base station location, base station identifier, base station operating frequency, handoff operation information), attention base station detailed information, and channel used by the base station. It is a message that is periodically transmitted to provide information, user area information for a cell area service, and information required for accessing a base station by a mobile communication terminal.

In the mobile communication terminal according to the present invention, during the session establishment process, the controller 110 determines whether the subnet where the mobile communication terminal was previously located at the time of call connection and the subnet according to the current location belong to the same service provider (S220). ). In this case, the mobile communication terminal may use, for example, a country code or Latitude and Longitude, which are location information of a base station. For example, if the country code is a specific value, that is, Korea, or if Lat and Lon are within a certain region, the session information established for the previous call is maintained.If both subnets belong to the same service provider, In operation S230, the session information set in the previous subnet is maintained as it is. This is because, if belonging to the same service provider can be managed by the same server. In this case, when the mobile terminal attempts to connect to the session, the mobile terminal transmits its own information, for example, electronic serial number (ESN) information, and then the service server is configured for the previous call to the mobile terminal. Get session information.

On the other hand, if the two subnets belong to different operators, the mobile terminal deletes the session information established for the previous call according to the existing method, accesses the 1xEV_DO network using the assigned UATI again after being assigned the UATI. Open the traffic channel and negotiate the session (S235). After the session negotiation, the terminal and the network have the same newly generated session information.

Session establishment typically includes protocol negotiation, parameter negotiation, and UATI assignment. Session configuration is performed to set the protocol set to be used for communication in the various signaling layers and to set the parameter set to be used for each established protocol.

Hereinafter, a process of setting session information by a mobile communication terminal in different regions belonging to the same service provider will be described in detail with reference to the accompanying drawings. 3 is a flowchart illustrating a session establishment method performed between a mobile communication terminal and a communication network according to an exemplary embodiment of the present invention.

First, in a subnet A, the mobile communication terminal transmits a random access terminal identifier (Random Access Terminal Indicator) to the access point to the UATI request message for the data service request (S300). In the mobile communication terminal, the UATI allocation request is transmitted to the SC / MM of the PCF via the access point. Then, the SC / MM allocates the UATI to the mobile communication terminal in response to the UATI request message of the mobile communication terminal (S302). The traffic channel is then formed on the mobile communication terminal and the service system. The mobile communication terminal stores the allocated UATI in the storage unit 120 and establishes a session (S306).

If it is determined that the location of the mobile communication terminal for the previous call and the location of the current terminal do not belong to the same operator, the controller 110 accesses the 1xEV_DO network using the assigned UATI, then opens a traffic channel and opens a session. Negotiate (S308). After the session negotiation ends, the terminal and the network have the same newly generated session information (S310). Then, the session is established on the mobile communication terminal and the service system (S312).

After that, the mobile communication terminal moves to the B-subnet, and if there is a call connection request, the mobile communication terminal grasps the current position and the position at the previous call connection. And it decides whether to keep the existing session information.

If subnet A and subnet B belong to the same service provider and are controlled by one management server, the same UATI as the previous call may be used by setting the UATI request message to UATI (S320).

Then, the service can be provided by connecting the session with the session information established for the previous call (subnet A) without attempting to connect a separate session (S304).

At this time, if the service system according to an aspect of the present invention receives a message in which the type of transmit ATI is set to UATI from the mobile communication terminal, the session information set during the previous call connection of the mobile communication terminal is maintained, and only the session number is newly assigned. To allocate a session (S322). As a result, the session can be established with the same session information as the previous call (S324).

According to the present invention according to this aspect of the present invention, by using the same session information as the previous call for a mobile communication terminal moving in the region belonging to the same server, a plurality of terminals for one terminal from the operator's point of view of managing the server Since UATI or session information is not allocated, it is possible to prevent resource exhaustion.

Furthermore, according to the present invention, since the service server does not store one or more session information for one mobile communication terminal, there is an effect that the session information can be managed efficiently.

The present invention has been described above with reference to preferred embodiments, but is not limited thereto, and is interpreted by the appended claims, which are intended to cover many modifications that will be apparent to those skilled in the art without departing from the scope of the present invention. Should be done.

Claims (10)

A hybrid mobile communication terminal supporting high speed packet data service: A communication unit for performing wireless communication with the base station; A location information storage unit for storing subnet information received through the communication unit when a previous call is connected to the mobile communication terminal; A control unit for determining whether to maintain existing session information according to the received current subnet information and the stored subnet information when connecting the call when the mobile communication terminal moves a subnet; Mobile communication terminal comprising a. The method of claim 1, wherein the control unit: And the subnet information of the mobile communication terminal is obtained from an overhead message transmitted from the base station. The method of claim 2, wherein the control unit: And the session information is maintained when the current subnet to which the mobile communication terminal belongs and the subnet to which the mobile communication terminal belongs when the previous call is connected are managed by the same service provider. The method of claim 1, wherein the controller comprises: In case of maintaining the existing session information, the mobile communication terminal, characterized in that for transmitting the unicast access terminal identifier (UATI) request message assigned to the previous call connection. The method of claim 1, wherein the controller comprises: In case of maintaining the existing session information, the mobile terminal, characterized in that the existing session information is maintained and a session is established by being assigned a different session number. Obtaining subnet information to which the current mobile communication terminal belongs, if there is a call connection attempt; Obtaining subnet information, to which the mobile communication terminal belongs, at a previous call connection from stored information; Determining whether to maintain existing session information according to a subnet belonging to the previous call connection and a subnet to which the current mobile communication terminal belongs; Establishing a session according to the determination result; Session management method applicable to a mobile communication terminal supporting a high-speed packet data service comprising a. The method of claim 6, The subnet information is applicable to a mobile communication terminal supporting a high speed packet data service, characterized in that obtained from an overhead message (Overhead Message) transmitted from a base station. The method of claim 7, wherein said determining step is: The mobile communication terminal is a mobile station supporting a high speed packet data service, characterized in that it is determined to maintain the existing session information when the current subnet and the subnet belonging to the previous call connection is managed by the same service provider. Session management method applicable in communication terminal. The method of claim 6, wherein the session establishment step comprises: And transmitting the UATI request message allocated to the previous call when maintaining the existing session information. The method of claim 6, wherein the session establishment step comprises: If the existing session information is maintained, the session management method applicable to a mobile communication terminal supporting a high-speed packet data service, characterized in that the step of maintaining the existing session information and establishing a session by receiving a different session number.

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