KR20090016064A - Method and apparatus for setting up signaling radio bearer in mobile communication system - Google Patents

Abstract

The present invention relates to a method and apparatus for setting a signaling radio bearer (hereinafter, referred to as 'SRB') in a mobile communication system, wherein a terminal sends an RRC connection request message including category information to a radio network controller. And a step of determining, by the radio network controller, an SRB establishment channel according to the category information, and performing a signaling radio bearer setup process through a dedicated transmission channel (DCH) for a user terminal having a specific category. Instead, by setting up a signaling radio bearer through an uplink dedicated transport channel (E-DCH) and a high speed downlink shared channel (HS-DSCH), unnecessary message transmission and reception and use of an OVSF code can be reduced.

Description

Signaling radio bearer setup method and device in mobile communication system {APPARATUS AND METHOD FOR SETUP SIGNALING RADIO BEARER IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for setting a signaling radio bearer (SRB) in a mobile communication system. In particular, the present invention relates to a fast uplink packet access during a radio resource control (RRC) connection procedure. The present invention relates to a method and apparatus for configuring a signaling radio bearer using a channel according to a category of a terminal supporting high speed uplink packet access (hereinafter, referred to as 'HSUPA').

In general, in a mobile communication system, a signaling radio bearer (hereinafter referred to as SRB) for transmitting and receiving a signaling message between a terminal and a radio network controller (RNC) when establishing a call. Set.

The 3GPP (3rd Generation Partnership Project) R3 and R4 standards require the SRB to be transmitted through a dedicated channel (hereinafter referred to as 'DCH'), whereas the 3GPP R6 standard provides an enhanced uplink dedicated transport channel (Enhanced Uplink). The SRB is transmitted through a Dedicated Channel (hereinafter referred to as "E-DCH") and a High-Speed Downlink Shared Channel (hereinafter referred to as "HS-DSCH"). In other words, the SRB is transmitted through the E-DCH in the reverse direction, and the HSB through the HS-DSCH in the forward direction. However, the SRB transmission through the E-DCH and the HS-DSCH may support only a terminal belonging to category 6 among the terminals supporting HSUPA. Here, the DCH refers to a channel capable of transmitting data and control signals between the network and the user terminal, the E-DCH refers to an enhanced uplink DCH, and the HS-DSCH is used to transmit high capacity data. It means a high speed downlink channel.

Therefore, conventionally, as shown in FIG. 1, after identifying a category of a terminal by performing an RRC connection establishment procedure, an E-DCH and an HS-DSCH are performed by performing a radio bearer reconfiguration procedure. Set the SRB through.

1 illustrates a signal flow for setting an SRB in a mobile communication system according to the prior art.

As shown in FIG. 1, if a user equipment (UE) 100 first transmits an RRC CONNECTION REQUEST message to the RNC 102 in step 110, the RNC 102 112. In step RRC connection setup (RRC CONNECTION SETUP) message is transmitted to the terminal 100.

In step 114, the terminal 100 sets an SRB through the DCH, and in step 116, sends an RRC connection setup complete message including the category information of the terminal to the RNC 102. do. In step 118, the RNC 102 checks the category included in the RRC connection establishment complete message and determines whether to maintain SRB configuration through the DCH or SRB reconfiguration through E-DCH and HS-DSCH. . In this case, if the category of the terminal is 6, the RNC determines resetting of the SRB. If the category is not 6, the RNC determines to maintain the SRB configuration.

When the category is 6, the RNC 102 proceeds to step 120 and transmits a radio bearer setup message to the terminal 100, and the terminal 100 transmits the E-DCH in step 122. After setting the SRB through the HS-DSCH, and proceeds to step 124 to transmit a radio bearer setup complete (RADIO BEARE SETUP COMPLETE) message to the RNC (102).

2 illustrates an SRC setting procedure of a radio network controller in a mobile communication system according to the prior art.

Referring to FIG. 2, when an RRC connection request message is received from a user terminal in step 201, the RNC proceeds to step 203 and transmits an RRC connection establishment message for instructing SRB configuration through the DCH. do. Thereafter, the RNC receives an RRC connection setup complete message from the user terminal in step 205 and checks category information of the user terminal in the RRC connection setup complete message in step 207. Thereafter, the RNC determines whether the category is 6 in step 209. If the category is not 6, the RNC proceeds to step 215 to maintain SRB configuration through the DCH and ends the algorithm according to the present invention.

On the other hand, if the category is 6, the RNC transmits a radio bearer setup message instructing to reset the SRB through the E-DCH and HS-DSCH in step 211, and proceeds to step 213. Receive a radio bearer setup complete message from the user terminal, and terminates the algorithm according to the present invention.

As described above, since the UE informs the RNC of the category when the UE transmits an RRC CONNECTION SETUP COMPLETE message, the SRRC is established through the DCH by completing an RRC connection establishment procedure. According to the category, the SRB configuration is maintained through the DCH or the SRB is reset through the E-DCH and the HS-DSCH.

Therefore, when setting the SRB through the conventional procedure, since the SRB must be set through the DCH, even in the case of the terminal having the category 6, the SRB must be reset through the E-DCH and the HS-DSCH. There is a problem that OVSF code resources for DCH are wasted. In addition, as the OVSF code resources are wasted unnecessary, the probability of accommodating more subscribers is reduced, and there are many problems in transmitting and receiving unnecessary messages.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a method and apparatus for setting up a signaling radio bearer in a mobile communication system.

Another object of the present invention is to provide a method and apparatus for configuring a signaling radio bearer using a channel according to a category of a terminal during an RRC connection process in a mobile communication system.

Another object of the present invention is to provide a method and apparatus for configuring a signaling radio bearer through an uplink dedicated transport channel and a high speed downlink shared channel without a signaling radio bearer setting process through a dedicated transport channel according to a category of a terminal in a mobile communication system. Is in.

According to a first aspect of the present invention for achieving the above object, a method of setting up a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system, the UE requests for RRC connection including category information ( And transmitting a RRC CONNECTION REQUEST) message to a radio network controller, and determining, by the radio network controller, an SRB establishment channel according to the category information.

According to a second aspect of the present invention for achieving the above objects, an operation method of a terminal for setting a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system includes category information. And generating a RRC connection request message and transmitting the generated RRC connection request message to a radio network controller.

According to a third aspect of the present invention for achieving the above object, an operation method of a radio network controller for setting a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system, the category information from the terminal; And receiving an RRC CONNECTION REQUEST message including a step of determining an SRB establishment channel according to the category information.

According to a fourth aspect of the present invention for achieving the above objects, a signaling radio bearer (hereinafter referred to as "SRB") setting system, the RRC connection request (RRC CONNECTION REQUEST) message including category information And a radio network controller for determining an SRB establishment channel by checking category information in the RRC connection request message received from the terminal.

According to a fifth aspect of the present invention for achieving the above objects, an apparatus of a terminal for setting a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system includes an RRC connection including category information. And a message processing unit for generating an RRC CONNECTION REQUEST message and a transceiver for transmitting the generated RRC connection request message to a radio network controller.

According to a sixth aspect of the present invention for achieving the above objects, the apparatus of the radio network controller for setting up a signaling radio bearer (hereinafter referred to as SRB) in the mobile communication system, the category information from the terminal; And a transceiver for receiving an RRC CONNECTION REQUEST message including a message processor, a message processor for checking category information in the RRC connection request message, and a channel determiner for determining an SRB establishment channel according to the category information. It is characterized by.

The present invention does not perform a signaling radio bearer setup process through a dedicated transport channel (DCH) for a user terminal having a specific category by transmitting and receiving category information of the terminal during the RRC connection process in a mobile communication system, By setting up a signaling radio bearer through an E-DCH and a high speed downlink shared channel (HS-DSCH), unnecessary message transmission and reception and use of an OVSF code can be reduced, thereby accommodating more user terminals. have.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In the present invention, a high speed uplink packet access (HSUPA) of the user terminal during an RRC connection process between a user equipment (UE) and a radio network controller (RNC) in a mobile communication system A technique for establishing a signaling radio bearer through a corresponding channel by transmitting and receiving a category will be described.

3 illustrates a signal flow for establishing an SRB in a mobile communication system according to the present invention.

Here, a message transmitted and received between a user equipment (UE) and a radio network controller (RNC) passes through a node B.

As shown in FIG. 3, the user terminal 300 first transmits an RRC connection request message to the RNC 302 for call connection in step 310. In this case, the user terminal 300 according to the present invention, as shown in Table 1, 'E-DCH physical layer category' which is an information element (Information Element) indicating the HSUPA category information of the terminal in the RRC connection request message Includes.

Thereafter, the RNC 302 checks the category information in the RRC connection request message and determines whether to set the SRB through the DCH or the SRB through the E-DCH and the HS-DSCH. The RRC connection setup message is sent to the user terminal 300 instructing to set the SRB through the determined channel. Here, the RNC 302 determines to set the SRB through the E-DCH and HS-DSCH when the category of the terminal is 6, and through the DCH when the category of the terminal is not 6 Decide on setting an SRB. Here, the SRB configuration information transmitted through the RRC connection configuration message is the same as the SRB configuration information included in the radio bearer configuration message in the prior art.

In step 314, the user terminal 300 identifies the channel to set the SRB in the RRC connection setup message, sets the SRB through the checked channel, and then proceeds to step 316 to perform the RNC 302. RRC connection setup complete message.

4 is a block diagram of a wireless network controller in a mobile communication system according to the present invention.

As shown in FIG. 4, the RNC includes a transceiver 401, a message processor 403, and a channel determiner 405.

First, the transceiver 401 provides a signal received from a terminal through a Node B to the message processor 403 and transmits a signal from the message processor 403 to the terminal.

The message processing unit 403 performs a function for generating and processing a message transmitted and received with the terminal through the transceiver unit 401. In particular, according to the present invention, the message processing unit 403 checks the category information in the RRC connection request message input from the transceiver unit 401 and provides it to the channel determination unit 405, and the channel determination unit 405 When the SRB configuration information is input from the terminal, the RRC connection setup message including the SRB configuration information is generated and output to the transceiver unit 401.

When the category information of the user terminal is input from the message processing unit 403, the channel determiner 405 determines the channel for performing SRB setting by checking the category information, and the SRB setting information for the determined channel. Is provided to the message processor 403 to request generation of an RRC connection setup message. In this case, when the category of the user terminal is 6, the channel determiner 405 determines an SRB configuration channel as an E-DCH and an HS-DSCH. Decide on

5 is a block diagram of a terminal in a mobile communication system according to the present invention.

As shown in FIG. 5, the user terminal includes a transceiver 501, a message processor 503, a category checker 505, and an SRB setup unit 507.

First, the transceiver 501 provides a signal received from the RNC through the Node B to the message processor 503, and transmits a signal from the message processor 503 to the RNC.

The message processor 503 performs a function for generating and processing a message transmitted and received with the RNC through the transceiver 501. In particular, according to the present invention, the message processing unit 503 receives the category information of the terminal from the category checking unit 505 and 'E-DCH physical layer category' information element indicating the category information as shown in Table 1 above. Generate an RRC connection request message including a. In addition, the message processing unit 503 checks the SRB configuration information in the RRC connection configuration message received from the RNC and provides it to the SRB configuration unit 507.

Table 1 below shows information elements included in an RRC CONNECTION REQUEST message.

Information Element Of Group name Need type and reference Version Message Type MP Message Type Radio Bearer IEs Predefined configuration status information MP Boolean REL-5 UE information elements Initial UE identity Initial UE identity 10.3.3.15 Establishment cause MP Establishment cause 10.3.3.11 Protocol error indicator MP Protocol error idicator 10.3.3.27 > UE Specific Behavior Information 1 idle MD Ue Specificatic Behavior Information 1 idle 10.3.3.51 Domain indicator OP CN domain identity 10.3.1.1 REL-6 Call type MP Enumerated (speech, video, other REL-6 UE capability indication CV-CS domain Enumerated (HS-DSCH, HS-DSCH + E-DCH) REL-6 > E- DCH physical layer category OP Integer (1..16) REL -6 MBMS Selected Service OP MBMS Selected Services Short 10.3.9a.7d REL-6 Measurement information elements Measurement information elements OP Measured results on RACH 10.3.7.45 Access statum release indicator MP Enumerated (REL, 4 REL-4 REL-5 REL-5 REL-6) REL-6

As shown in Table 1, in the present invention, the E-DCH terminal is included in the RRC connection process by including the 'E-DCH physical layer category' indicating the HSUPA category of the UE in the RRC connection request message. And SRB can be configured through HS-DSCH.

When a call setup event occurs, the category checking unit 505 checks the HSUPA category of the terminal and provides the message to the message processing unit 503, and the SRB setting unit 507 is provided by the message processing unit 503. After checking the channel to set the SRB from the input SRB configuration information, the SRB is set through the channel.

6 is a flowchart illustrating a SRB setting procedure of a radio network controller in a mobile communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 6, when the RRC connection request message is received from the user terminal in step 601, the RNC checks category information included in the RRC connection request message in step 603.

In step 605, the RNC checks whether the checked category information indicates a category value of 6, which supports SRB configuration through E-DCH and HS_DSCH. If the category information does not indicate 6, the RNC proceeds to step 611 and determines to configure the SRB through the DCH, and then generates an RRC connection configuration message including configuration information for configuring the SRB through the DCH. After transmitting to the user terminal, the flow proceeds to step 609.

On the other hand, when the category information indicates 6, the RNC proceeds to step 607 to determine to set the SRB through the E-DCH and HS-DSCH, and then to set the SRB through the E-DCH and HS-DSCH After generating an RRC connection configuration message including configuration information and transmitting it to the user terminal, the process proceeds to step 609.

In step 609, the RNC receives an RRC connection establishment complete message from the user terminal and terminates the algorithm according to the present invention.

7 illustrates an SRB setting procedure of a terminal in a mobile communication system according to an embodiment of the present invention.

Referring to FIG. 7, first, when a call setup event occurs in step 701, the terminal generates an RRC connection request message including category information of the terminal itself and transmits it to the RNC.

In step 705, the terminal receives an RRC connection configuration message from the RNC. In step 707, the terminal checks SRB configuration information included in the RRC connection configuration message and configures an SRB through a corresponding channel. That is, the terminal configures the SRB through the corresponding channel by receiving an SRB configuration channel according to its category through the RRC connection configuration message from the RNC. For example, when the category supports the E-DCH and the HS-DPCH, the terminal receives the E-DCH and the HS-DPCH from the RNC to configure the SRB, and the category corresponds to the E-DCH and the E-DCH. If the terminal does not support HS-DPCH, the terminal receives the DCH from the RNC and configures the SRB.

Thereafter, the terminal generates an RRC connection setup complete message in step 709 and transmits it to the RNC, and then terminates the algorithm according to the present invention.

The present invention described above assumes that a specific cell supports a fractional dedicated physical channel (F-DPCH). This means that transmission power control (TPC) information required for uplink power control is transmitted through the F-DPCH without establishing an associated DPCH (SRCH) associated with SRB transmission through HS-DSCH. To save. In addition, the RNC must pre-configure and own radio bearer parameters related to the SRB configuration so as to allocate the SRB configuration through the E-DCH and the HS-DSCH to the UE.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

1 is a diagram illustrating a signal flow for setting an SRB in a mobile communication system according to the prior art;

2 is a diagram illustrating an SRC setting procedure of a radio network controller in a mobile communication system according to the prior art;

3 is a diagram illustrating a signal flow for setting an SRB in a mobile communication system according to the present invention;

4 is a block diagram of a radio network controller in a mobile communication system according to the present invention;

5 is a block diagram of a terminal in a mobile communication system according to the present invention;

6 is a diagram illustrating an SRB setting procedure of a radio network controller in a mobile communication system according to an embodiment of the present invention; and

7 is a diagram illustrating an SRB setting procedure of a terminal in a mobile communication system according to an embodiment of the present invention.

Claims (20)

In the method for setting up a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system, Transmitting, by the UE, an RRC CONNECTION REQUEST message including category information to the radio network controller; And determining, by the wireless network controller, an SRB establishment channel according to the category information. The method of claim 1, Transmitting, by the wireless network controller, an RRC connection setup message including information on the determined channel to the terminal; And setting, by the terminal, an SRB through the determined channel. The method of claim 1, The process of determining the SRB configuration channel, Determining whether the category supports Enhanced Uplink Dedicated Channel (E-DCH) and High Speed-Downlink Shared Channel (HS-DSCH); If the category supports two channels, determining the two channels as the SRB configuration channel. The method of claim 3, wherein If the category does not support two channels, the method further comprising determining a dedicated channel (DCH) as the SRB configuration channel. In the operating method of a terminal for setting up a signaling radio bearer (hereinafter referred to as "SRB") in a mobile communication system, Generating an RRC CONNECTION REQUEST message including category information; And transmitting the generated RRC connection request message to a wireless network controller. The method of claim 5, Receiving an RRC connection setup message including information of the SRB setup channel from the wireless network controller; And setting the SRB through a channel indicated by the information of the SRB establishment channel. The method of claim 6, The information on the SRB configuration channel, Enhanced Uplink Dedicated Channel (E-DCH) and High Speed-Downlink Shared Channel (HS-DSCH) or Dedicated Channel (DCH) Way. A method of operating a radio network controller for establishing a signaling radio bearer (hereinafter referred to as SRB) in a mobile communication system, Receiving an RRC CONNECTION REQUEST message including category information from the terminal; And determining an SRB establishment channel according to the category information. The method of claim 8, And transmitting an RRC CONNECTION SETUP message including information on the determined channel to the terminal. The method of claim 8, The process of determining the SRB configuration channel, Determining whether the category supports Enhanced Uplink Dedicated Channel (E-DCH) and High Speed-Downlink Shared Channel (HS-DSCH); If the category supports two channels, determining the two channels as the SRB configuration channel. The method of claim 10, If the category does not support two channels, the method further comprising determining a dedicated channel (DCH) as the SRB configuration channel. In the signaling radio bearer (hereinafter referred to as SRB) setting system, A terminal for transmitting an RRC connection request message including category information; And a radio network controller for determining an SRB establishment channel by checking category information in the RRC connection request message received from the terminal. The method of claim 12, The radio network controller transmits an RRC connection setup message including information on the determined channel to the terminal. The terminal, the RRC connection setup message from the radio network controller, characterized in that for setting the SRB through the determined channel. The method of claim 12, The wireless network controller, if the category supports the enhanced uplink dedicated channel (E-DCH) and the high speed downlink shared channel (HS-DSCH), the two channels, Is determined as the SRB configuration channel, and if the category does not support the two channels, the dedicated channel (DCH) is determined as the SRB configuration channel. In the apparatus of the terminal for setting up a signaling radio bearer (hereinafter referred to as "SRB") in a mobile communication system, A message processing unit generating an RRC CONNECTION REQUEST message including category information; And a transceiver for transmitting the generated RRC connection request message to a wireless network controller. The method of claim 15, The transceiver unit receives an RRC connection setup message including information of the SRB setup channel from the radio network controller, And an SRB setting unit configured to set the SRB through a channel indicated by the information of the SRB setting channel. The method of claim 16, The information on the SRB configuration channel, Enhanced Uplink Dedicated Channel (E-DCH) and High Speed-Downlink Shared Channel (HS-DSCH) or Dedicated Channel (DCH) Device. In the apparatus of the radio network controller for setting up a signaling radio bearer (hereinafter referred to as "SRB") in a mobile communication system, A transceiver for receiving an RRC connection request message including category information from a terminal; A message processor for checking category information in the RRC connection request message; And a channel determiner configured to determine an SRB set channel according to the category information. The method of claim 18, The message processing unit generates an RRC connection setup message including information on the determined channel, The transceiver, characterized in that for transmitting the generated message to the terminal. The method of claim 18, The channel determination unit, It is determined whether the category supports Enhanced Uplink Dedicated Channel (E-DCH) and High Speed-Downlink Shared Channel (HS-DSCH), and the category supports two channels. And determining the two channels as the SRB configuration channel, and if the category does not support the two channels, determining a dedicated transport channel (DCH) as the SRB configuration channel.

Images