TWI510119B - Method and apparatus for supporting short message service of mobile station during idle mode in wireless communication system - Google Patents

Description

Method and device for supporting mobile station's short message service during idle mode in wireless communication system

The present invention relates to wireless communication systems. More specifically, the present invention relates to a method and apparatus for transmitting a Short Message Service (SMS) message in a wireless communication system supporting an idle mode mobile station (MS).

In the next generation communication system of the fourth-generation (the 4 ^th Generation, 4G) communication system, research and commercialization being to provide information to the user about a rate of one million 100 characters / sec or more of a variety of services. In particular, the 4G communication system is now being studied intensively to ensure broadband wireless access (BWA) communication systems (such as wireless local area network (LAN) systems and wireless metropolitan areas (Metropolitan Area). Network, MAN) system) supports the high-speed service by means of mobility and quality-of-service (QoS). In addition, a typical 4G communication system is the Institute of Electrical and Electronics Engineers (IEEE) 802.16 communication system.

According to the IEEE 802.16 communication system standard, in a situation where the traffic to be transmitted/received does not exist for a predetermined period of time, the mobile station (MS) operates in the idle mode and minimizes power consumption. The MS wakes up from idle mode during the paging listening interval and receives a paging message. The paging message contains information that guides the idle mode MS to perform a network reentry operation to cause the idle mode MS to transition from the idle mode to the connected mode (ie, the connected state) because of the presence of the Forwarding to the idle mode MS downlink (DownLink, DL) data; directing the idle mode MS to perform location update; or the like. The DL data contains SMS information to be transmitted to the idle mode MS. In the idle mode MS SMS message is in a standby state, the base station (BS) must use the paging message to direct the idle mode MS to perform the network reentry operation.

On the other hand, the IEEE 802.16m communication system provides a method in which the idle mode MS can receive the SMS message without the need to go from the idle mode to the connected mode in the case where the SMS message needs to be transmitted to the idle mode MS (also That is, the transition state of the connected state). An SMS message transmission supporting an idle mode MS defined in an IEEE 802.16m communication system is described with reference to FIG.

1 illustrates an SMS message transmission from a BS to an idle mode MS in a wireless communication system in accordance with conventional techniques.

Referring to FIG. 1, when the MS 100 performs the paging non-listening interval operation in the idle mode in step 101, the BS 150 receives the SMS message for the MS 100 in step 103. In step 105, the MS 100 performs a paging listening interval operation. In step 107, the BS 150 transmits a paging message containing information about the MS 100 to the MS 100. The paging message of step 107 contains information that instructs the MS 100 to perform the location update process. Upon receiving the paging message containing the information from the BS 150 instructing the MS 100 to perform the location update procedure in step 107, the MS 100 proceeds to step 109 and transmits the ranging code to the BS 150. In response to the ranging code transmitted in step 109, in step 111, the MS 100 receives the ranging code response message from the BS 150. In step 113, the MS 100 transmits a ranging request message to the BS 150, the ranging request message including an indicator for informing the location update process to execute. After receiving the ranging request message of step 113 from the MS 100, in step 115, the BS 150 transmits a ranging response message including the SMS information.

The method of transmitting an SMS message to an idle mode MS in an IEEE 802.16m communication system as described with reference to FIG. 1 utilizes a ranging message used in the ranging process. However, the method of combining the ranging process with the SMS message complicates the processing of the idle mode MS, and therefore, there is a need for a method of transmitting an SMS message to the idle mode MS regardless of the ranging process.

It is an object of the present invention to address at least the problems and/or disadvantages described above and at least the advantages described below. Accordingly, an aspect of the present invention is to provide a short message service (SMS) message transmission processing method of a mobile station (MS) in an idle mode.

The above objects are achieved by providing a method and apparatus (e.g., as specified in an independent item) for supporting an SMS of an MS during an idle mode in a wireless communication system. The preferred embodiment is defined by means of an accessory.

According to an aspect of the present invention, an MS operation method for supporting an SMS in a wireless communication system is provided. The method includes: receiving an SMS message from a base station (BS) via a ranging message in an idle mode; turning on a timer after receiving an SMS message from the BS; waiting for transmitting an SMS message while the timer is operating Uplink (UL) resource allocation of the acknowledgement (ACK) message; and after allocating the UL resource for the ACK message transmission, the UL resource is used to transmit the ACK message.

According to another aspect of the present invention, a BS operating method for supporting SMS in a wireless communication system is provided. The method includes: transmitting an SMS message via a ranging message; opening a timer after transmitting the SMS message; allocating a UL resource for transmitting an ACK message regarding the SMS message when the timer is operating; and receiving the SMS message ACK message.

According to another aspect of the present invention, an MS device for supporting SMS in a wireless communication system is provided. The device includes a receiver, a controller, and a transmitter. The receiver receives the SMS message from the BS via the ranging message in idle mode. After receiving the SMS message from the BS, the controller starts the timer and, while the timer is operating, waits for the UL resource allocation for transmitting the ACK message for the SMS message. After allocating the UL resources for ACK message transmission, the transmitter uses the UL resources to transmit the ACK message.

According to still another aspect of the present invention, a BS apparatus for supporting SMS in a wireless communication system is provided. The device includes a transmitter, a controller, and a receiver. The transmitter transmits the SMS message via the ranging message in idle mode. After transmitting the SMS message, the controller turns on the timer, and when the timer operates, allocates a UL resource for transmitting an ACK message regarding the SMS message. The receiver receives an ACK message regarding the SMS message.

According to still another aspect of the present invention, an MS operation method for processing an SMS in a wireless communication system is provided. The method includes: upon generating an SMS message to be transmitted in an idle mode, starting a timer; and receiving a UL resource allocation necessary for transmitting the SMS message; transmitting the SMS message using the allocated UL resource; and receiving the ACK message for SMS messages.

According to still another aspect of the present invention, a BS operation method for processing an SMS in a wireless communication system is provided. The method includes: performing UL resource allocation necessary for transmitting an SMS message; and turning on a timer; recognizing the receipt or non-reception of the SMS message when the timer is driven; transmitting the SMS message after receiving the SMS message ACK message.

Other aspects, advantages, and salient features of the present invention will become apparent from the embodiments of the invention. Sexual embodiment.

The above-described objects, features, and advantages of the present invention will become more apparent from the description of the appended claims.

The following description of the drawings, which are set forth in the claims It is intended to be illustrative, and is not intended to be Therefore, it will be appreciated by those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

The following describes a short message service (SMS) message transmission to an idle mode MS and an SMS message transmission from an idle mode MS in a wireless communication system (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.16m system) in accordance with the present invention. Method and device.

2 illustrates a signal flow between a BS and an idle mode MS in a situation where a BS transmits an SMS message to an idle mode MS in a wireless communication system, according to an exemplary embodiment of the present invention.

Referring to FIG. 2, when the MS 200 performs the paging non-listening interval operation in the idle mode in step 201, the MS 200 transitions to the paging listening interval in the idle mode in step 205. On the other hand, in step 203, the BS 250 recognizes the generation of the SMS message to be transmitted to the idle mode MS 200. In step 207, the BS 250 transmits a paging message containing information about the MS 200 performing the paging listening interval operation to the MS 200. The paging message contains information that instructs the MS 200 to perform the location update process. Here, instructing the MS 200 to perform a location update procedure corresponds to information that instructs the MS 200 to perform a general location update procedure. However, in the case where a separate definition is instructed to instruct the MS 200 to perform the location update process for SMS message reception, the defined navigation information may be included in the paging message of step 207.

In step 209, the MS 200 transmits the ranging code to the BS 250 and, in step 211, the MS 200 receives the ranging code response message from the BS 250. In step 213, the MS 200 transmits a ranging request message including an indicator instructing the location update process to be transmitted to the BS 250. On the other hand, in the case where the MS 200 previously knows the SMS transmission information via the paging message of step 207, the ranging request message transmitted in step 213 may include an indication for notifying the location update process for the SMS information. symbol.

The indicator included in the ranging request message and used to inform the location update process for the SMS information may be used as one bit of the ranging purpose indicator of the field of the ranging request message.

As shown in Table 1 above, if the bit #0 of the "ranging target indicator" is set to "1", the BS identification code (BSID) of the servo is combined, which indicates that the MS is currently attempting to hand over. (Handover, HO). If bit #1 is set to "1", the paging controller ID (IDentifier, ID) is combined, which indicates that the MS is attempting to return to the network of the BS in the idle mode. If bit #2 is set to "1", it indicates that the MS is currently attempting a prepared HO. If bit #3 is set to "1", it instructs the MS to perform the idle mode location update process. And, if bit #4 is set to "1", it indicates the MS operation of the emergency call process. Finally, if bit #5 is set to "1", it indicates that the MS is starting the idle mode location update process for the SMS message service.

Thereafter, in step 215, the MS 200 receives a ranging response message from the BS 250 as a response to the ranging request message. The ranging response message contains an indicator that informs the MS 200 that it is a location update procedure for the SMS message. The indicator that informs the ranging response message that the location update process for the SMS message is a response to the location update process of the MS 200 and informs that there is an SMS message to be received by the MS 200.

The indicator included in the ranging response message and used to inform the location update process for the SMS message can be utilized as a bit of the location update response for the field of the ranging response message.

In addition, the ranging response message includes a STATION Identifier (STID) that the MS 200 will use for SMS message reception.

Thereafter, in step 217, the MS 200 receives a Layer 2 (L2) transmission message containing the SMS information from the BS 250. The L2 transmission message is encoded using the STID information received in step 215. The header of the L2 transport message contains a Flow Identifier (FID) corresponding to the primary connection. After receiving the L2 transmission message containing the SMS message, in step 219, the MS 200 transmits an acknowledgment (ACK) message to the BS 250. Thereafter, in step 221, the MS 200 performs an idle mode operation. After the BS 250 receives the ACK message from the MS 200, the BS 250 releases the STID assigned to the MS 200 and the primary connection, and manages the MS 200 as the idle mode MS.

3 illustrates a signal flow between a BS and an idle mode MS in a state in which an idle mode MS transmits an SMS message to a BS in a wireless communication system, according to an exemplary embodiment of the present invention.

Referring to FIG. 3, when the MS 300 performs an idle mode operation in step 301, the MS 300 recognizes in step 303 that an SMS message to be transmitted via an uplink (UL) is present in the buffer. In step 305, the MS 300 transmits a ranging code to connect to the BS 350 to transmit the SMS message to the BS 350. In response to the transmitted ranging code, in step 307, the MS 300 receives the ranging code response message from the BS 350. In step 309, the MS 300 transmits a ranging request message to the BS 350. The ranging request message contains an indicator that informs the location update process for the SMS message transmission. The indicators included in the ranging request message can be as shown in Table 1 above. After receiving the ranging request message including the indicator informing the execution of the location update procedure for the SMS message transmission, in step 311, the BS 350 transmits the ranging response message to the MS 300. The ranging response message transmitted in step 311 contains an indicator for informing the location update process for SMS message transmission, which has the structure of Table 2 above. The indicator that informs the location update process to execute is a response to an indicator that informs the execution location update process, and informs the BS 350 that it is ready to receive the SMS message to be transmitted by the MS 300.

In addition, via the ranging response message, the BS 350 transmits the STID (i.e., MS identification code) of the MS 300 that will be used to transmit the SMS message to the MS 300. In step 313, the MS 300 transmits an L2 transmission message containing the SMS information to the BS 350. When transmitting the L2 transmission message, the MS 300 uses the STID received in step 311 and the FID corresponding to the primary connection. In addition, the MS 300 must be assigned a UL band from the BS 350 to transmit the L2 transmission message and, at this time, the MS 300 uses the STID and the FID corresponding to the primary connection. After receiving the L2 transmission message containing the SMS information from the MS 300, the BS 350 transmits the ACK message to the MS 300 in step 315. After the MS 300 receives the ACK message, the MS 300 proceeds to step 317 and continues to perform the idle mode operation. In step 317, the BS 350 releases the STID assigned for the SMS message transmission for the MS 300 and the FID corresponding to the primary connection, and then the BS 350 continues to manage the MS 300 as the idle mode MS.

4 illustrates an operation of an MS receiving an SMS message in an idle mode in a wireless communication system in accordance with an exemplary embodiment of the present invention.

Referring to Figure 4, in step 401, the MS is present in the paging non-listening interval of the idle mode. In step 403, the MS identifies whether it is time to transition to the paging listening interval. If transitioning to the paging listening interval, the MS proceeds to step 405 and receives the paging message in the paging listening interval. If the result of the determination in step 403 is that it has not reached the time point of transition to the paging listening interval, the MS maintains the paging non-listening interval of step 401.

Thereafter, in step 407, the MS determines whether the paging message contains corresponding information. If the paging message does not contain the corresponding information, the MS returns to step 401. If the result of the determination in step 407 is that the paging message contains information about the MS, the MS proceeds to step 409 and determines whether the MS information is a network reentry command. If the network re-entry command is received in step 409, then in step 411, the MS performs a network re-entry procedure and, in step 413, the MS performs an idle mode. The network re-entry process of step 411 begins when the MS performs a ranging procedure with the BS. The network reentry process is not relevant to the present invention, and thus a detailed description thereof will be omitted.

In contrast, if the MS information is not a network return command, then in step 415, the MS determines whether the MS information guides the location update process. If the MS Information Guided Location Update procedure is performed in step 415, then in step 417, the MS performs a code based ranging procedure for the BS. The ranging process corresponds to steps 209 to 211 of FIG. In step 419, the MS transmits a ranging request message to the BS. The ranging request message contains information that informs the MS of the location update process. At this time, the ranging request message may include the information of Table 1 above. Thereafter, in step 421, the MS receives a ranging response message from the BS. In step 423, the MS determines whether the ranging response message includes SMS message guidance information. The SMS message guidance information of step 423 is a location update execution guide for SMS message transmission, and corresponds to the information of Table 2 above.

If the result of the determination in step 423 is that the ranging response message includes a message informing the MS that the SMS message has been transmitted, the ranging response message of step 421 includes the STID information necessary for the MS to receive the SMS message. In addition, the MS recognizes that the primary connection is set to receive SMS messages and that the FID corresponding to the primary connection is available.

In step 425, the MS receives an L2 transmission message containing SMS information. The L2 transport message can be decoded using the STID and the FID corresponding to the primary connection. In step 427, the MS transmits an ACK message to the BS, and returns to step 401 and continues to perform the idle mode operation.

If the result of the determination in step 423 is that the SMS message guidance information is not included, the MS returns to step 401 and continues to perform the idle mode operation.

If the result of the determination in step 415 is that the MS information does not direct the location update process of the MS to execute, the MS performs other defined processes (eg, returning to step 401).

FIG. 5 illustrates an operation of a BS transmitting an SMS message to an idle mode MS in a wireless communication system in accordance with an exemplary embodiment of the present invention.

Referring to Figure 5, in step 501, the BS recognizes that the SMS message for the idle mode MS arrives at the message buffer. In step 503, the BS waits until the time point corresponding to the paging listening interval of the MS. In step 505, the BS transmits a paging message that instructs the MS to perform a location update procedure in the paging listening interval of the MS.

Thereafter, in step 507, the BS waits for the location update procedure message of the MS (ie, the ranging request message) and, in step 509, the BS determines whether it has received the ranging request message from the MS, the ranging request message. Contains information indicating that it is a location update process. The ranging request message received from the MS in step 509 may include the information in Table 1 above. In step 511, the BS transmits a ranging response message as a response to the ranging request message. The ranging response message includes an indicator indicating the transmission of the SMS message to the MS (ie, the information in Table 2 above), and the STID information of the MS.

Thereafter, in step 513, the BS transmits an L2 transmission message containing the SMS information to the MS. In step 515, the BS receives the ACK message from the MS and, in step 517, the BS recognizes that the MS proceeds to the idle mode.

6 illustrates an operation of an MS transmitting an SMS message in an idle mode in a wireless communication system in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 6, when the MS is in the idle mode state in step 601, in step 603, the MS determines whether an SMS message is generated in the buffer (ie, whether there is an SMS message input by the user). If there is an SMS message to be transmitted by the MS in step 603, the MS proceeds to step 605 and performs a code-based ranging procedure to perform a location update procedure for transmitting the SMS message. Step 605 corresponds to steps 305 through 307 of FIG. In step 607, the MS transmits a ranging request message containing indication information informing the location update process for SMS message transmission. The instruction information for informing the location update process for SMS message transmission corresponds to Table 1 above. In step 609, the MS receives a ranging response message from the BS. The ranging response message contains indication information (corresponding to Table 2 above) that informs the location update process for the SMS message transmission, and contains the STID information that the MS will use for SMS message transmission. In step 611, the MS transmits an L2 transmission message containing the SMS information. At this time, for the UL band request/allocation process for transmitting the L2 transmission message, the MS uses the STID and the primary connection FID information included in the ranging response message of step 609. In step 613, the MS receives an ACK message from the BS and returns to step 601 and continues to perform the idle mode operation.

FIG. 7 illustrates an operation of a BS receiving an SMS message from an idle mode MS in a wireless communication system in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 7, in step 701, the BS receives a ranging request message indicating that it is a location update procedure for SMS message transmission. The ranging request message contains the information in Table 1 above. In step 703, the BS recognizes that the MS transmitting the ranging request message is the idle mode MS. In step 705, the BS transmits a ranging response message including a location update procedure execution indicator for SMS message transmission to the MS. The indicator information corresponds to the information in Table 2 above. The BS uses the ranging response message to transmit the STID information that the MS will use for SMS message transmission. In addition, the BS sets the primary connection that the MS will use to transmit SMS messages. Thereafter, in step 707, the BS receives an L2 transmission message containing the SMS information from the MS. Prior to step 707, the BS may perform a UL band request/allocation procedure for L2 transmission messages transmitted by the MS.

Thereafter, in step 709, the BS transmits an ACK message to the MS and, in step 711, the BS recognizes that the MS continues to perform the idle mode operation again. In step 711, the BS releases the STID and primary connection assigned to the MS in step 705.

In the procedures of FIGS. 3, 6, and 7, the description will be made assuming that a UL band request and allocation process for transmitting an L2 transmission message including SMS information between the MS and the BS is performed. On the other hand, the BS may previously know that the MS transmits the L2 transmission message including the SMS information via the ranging request message transmitted by the MS. At this time, the band allocation information for transmitting the L2 transmission message can be transmitted together via the ranging response message without a separate UL band request and allocation process.

On the other hand, in the case where the SMS message to be forwarded to the idle mode MS and the general DL data exist in the BS, the BS transmits a paging message for performing network reentry during the paging listening interval of the idle mode MS. Thereafter, if the network re-entry process for the MS is completed, the BS forwards the SMS message and the general DL data to the MS. In contrast, in the presence of an SMS message and general UL data to be transmitted by the idle mode MS, the MS performs a network re-entry procedure to the BS, and then transmits the SMS message and general UL data to the BS. The operations described above are the same as the general transition operation from the idle mode to the connected state, and conform to the network re-entry process that is implemented after the state transition.

8 illustrates a configuration of an apparatus for transmitting an SMS message to an idle mode MS/self-idle mode MS to receive an SMS message in a wireless communication system, according to an exemplary embodiment of the present invention. The device can be a BS or an MS.

Referring to FIG. 8, the device includes a radio frequency (RF) processor 801, an analog to digital converter (ADC) 803, and an Orthogonal Frequency Division Multiplexing (OFDM) demodulation. Transformer 805, decoder 807, message processor 809, controller 811, message generator 817, encoder 819, OFDM modulator 821, digital to analog converter (DAC) 823, and RF processor 825. Here, the RF processor 801 and the RF processor 825 can operate in a Time Division Duplex (TDD) or a Frequency Division Duplex (FDD) mode. For example, in operation of the TDD mode, during the receive interval, the time controller 829 controls the switch 827 to operate the RF processor 801 and, during the transmission interval, controls the switch 827 to operate the RF processor 825.

The RF processor 801 converts the RF signal received via the antenna into a baseband analog signal. The ADC 803 converts analog signals from the RF processor 801 into sample data. The OFDM demodulator 805 processes the sample data output from the ADC 803 by using a Fast Fourier Transform (FFT) to convert the sample data into frequency domain data, and selects the frequency domain data to be used for actual reception. Subcarrier data. The decoder 807 demodulates and decodes the data from the OFDM demodulation transformer 805 according to a predefined modulation level (i.e., Modulation and Coding Scheme (MCS) level). The message processor 809 analyzes the control message input from the decoder 807 and provides the result to the controller 811. For example, the message processor 809 analyzes the ranging request message, the ranging response message, the paging message, and the like, and provides the result to the controller 811.

The controller 811 performs corresponding processing on the information from the message processor 809, and generates information to be transmitted and supplies the information to be transmitted to the message generator 817. The message generator 817 generates a message having various kinds of information supplied from the controller 811, and outputs the message to the encoder 819 of the physical layer. For example, the message generator 817 generates a ranging request message, a ranging response message, a paging message, and the like, and outputs the generated message to the encoder 819 of the physical layer.

Encoder 819 encodes and modulates the data from message generator 817 based on a predefined modulation level (i.e., MCS level). The OFDM modulator 821 processes the data from the encoder 819 by inverse fast Fourier transform (IFFT) and outputs sample data (i.e., OFDM symbols). The DAC 823 converts the sample data into an analog signal. The RF processor 825 converts the analog signal from the DAC 823 into an RF signal and transmits the RF signal via the antenna.

In the above configuration, the controller 811 (protocol controller) controls the message processor 809 and the message generator 817. That is, the controller 811 can perform the functions of the message processor 809 and the message generator 817. The components are constructed and depicted separately to distinguish and describe the various functions of the present invention. Therefore, in a practical implementation, the configuration may be such that all of them are processed in the controller 811, or the configuration may be such that only a part thereof is processed in the controller 811. In addition, controller 811 uses the corresponding components of the physical layer to receive the necessary information during the execution of the contract processing, or to use the corresponding components of the physical layer to generate the control signals.

The operation of the BS to transmit the SMS message to the MS is described below. When the controller 811 of the MS 200 performs the paging non-listening interval operation in the idle mode, the controller 811 of the MS 200 shifts to the paging listening interval of the idle mode.

The controller 811 of the BS 250 identifies the generation of the SMS to be transmitted to the idle mode MS 200, and transmits a paging message containing information on the MS 200 performing the paging listening interval operation. The paging message contains information that instructs the MS 200 to perform the location update process.

The controller 811 of the MS 200 transmits the ranging code to the BS 250 and receives the ranging code response message from the BS 250. The controller 811 of the MS 200 transmits a ranging request message including an indicator instructing the location update process to be transmitted to the BS 250. The indicator included in the ranging request message may be used as one bit of the ranging purpose indicator of the field of the ranging request message.

The controller 811 of the MS 200 receives a ranging response message from the BS 250 as a response to the ranging request message. The ranging response message contains an indicator that informs the MS 200 that it is a location update procedure for SMS messages. The indicator that informs the ranging response message that the location update process for the SMS message is a response to the location update process of the MS 200 and informs that there is an SMS message to be received by the MS 200.

The controller 811 of the MS 200 receives the L2 transmission message containing the SMS information from the BS 250. The L2 transmission message is encoded using the STID information received in step 215. The header of the L2 transport message contains the FID corresponding to the primary connection. After receiving the L2 transmission message containing the SMS information, the controller 811 of the MS 200 transmits the ACK message to the BS 250. After transmitting the ACK message, the controller 811 of the MS 200 performs an idle mode operation. The controller 811 of the BS 250 receives the ACK message from the MS 200, and then releases the STID and primary connection assigned to the MS 200, and manages the MS 200 as an idle mode MS.

In contrast, the operation of the MS to transmit the SMS message to the status of the BS is described below. When the idle mode operation is performed, the controller 811 of the MS 300 recognizes that the SMS message to be transmitted via the UL exists in the buffer. In order to transmit an SMS message, the controller 811 of the MS 300 transmits a ranging code for accessing the BS 350. In response to the transmitted ranging code, the controller 811 of the MS 300 receives the ranging code response message from the BS 350. The controller 811 of the MS 300 transmits a ranging request message to the BS 350. The ranging request message contains an indicator that informs the location update process for the SMS message transmission. The indicators included in the ranging request message can be as shown in Table 1 above.

The controller 811 of the BS 350 transmits a ranging response message to the MS 300. The ranging response message contains an indicator to inform the execution of the location update procedure for the SMS message transmission, which has the structure of Table 2 above. The indicator that informs the location update process to execute is a response to an indicator that informs the execution location update process, and informs the BS 350 that it is ready to receive the SMS message to be transmitted by the MS 300.

Further, via the ranging response message, the controller 811 of the BS 350 transmits the STID (i.e., MS identification code) of the controller 811 of the MS 300 that will be used to transmit the SMS message. The controller 811 of the MS 300 transmits an L2 transmission message containing the SMS information to the BS 350. When transmitting the L2 transmission message, the controller 811 of the MS 300 uses the received STID and the FID corresponding to the primary connection. In addition, in order to transmit the L2 transmission message, the UL band from the BS 350 must be allocated to the controller 811 of the MS 300 and, at this time, the controller 811 of the MS 300 uses the STID and the FID corresponding to the primary connection. After receiving the L2 transmission message containing the SMS information from the MS 300, the controller 811 of the BS 350 transmits the ACK message to the MS 300. The controller 811 of the MS 300 receives the ACK message and then proceeds to perform the idle mode operation.

In the example of FIG. 2, the following description is made: In the case where an L2 transmission message is used to transmit an SMS message, the BS assigns the STID and FID to the MS to receive the SMS message and transmit an ACK message regarding the received SMS message. The STID and FID are allocated in the connection state between the BS and the MS. In other words, in the example of Figure 2, the use of the L2 transport message requires a bandwidth request operation based on the MS ID (i.e., STID).

In another exemplary embodiment of FIG. 9 to FIG. 12 below, the BS does not allocate the STID and the FID for the idle mode MS, and may include the SMS message in the ranging response message of step 215 to transmit the SMS of the L2 layer. message. In this case, a method is needed in which the MS transmits a response to the reception of the SMS message contained in the ranging response message. To this end, a separate reception response resource for the SMS message is used in the connectionless state between the BS and the MS. In other words, the BS allocates UL resources for ACK message transmission in an unsolicited manner.

9 is a flow diagram illustrating an operation of an MS to process a reception in response to an SMS message in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 9, if the MS receives the ranging response message including the SMS message in step 901, then in step 903, the MS turns on the timer (X). The ranging response message including the SMS message of step 901 corresponds to the ranging response message of step 215. When the timer (X) is turned on, in step 905, if the UL resource for transmitting the ACK message regarding the SMS message is allocated by the BS in the connectionless state between the MS and the BS, the MS waits.

The ranging response message of step 901 includes an identification code for decoding the UL resource to enable determination of whether the UL resource is allocated to the MS. Alternatively, the identification code can be configured based on the MS identification code used by the MS in idle mode, and can be used in conjunction with information such as the paging period of the MS and its like to identify the MS. If the result of the identification in step 905 is that the MS is allocated UL resources for ACK message transmission, then in step 909, the MS stops the timer (X). In step 911, the MS transmits an ACK message to the BS. The ACK message can be the same as the ACK message of step 219. At this time, the FID included in the Media Access Control (MAC) header of the ACK message is received from the BS via the ranging response message of step 901, or the FID is corresponding to the response for receiving the SMS message. A predefined FID for the purpose. After transmitting the ACK message, the MS proceeds to the idle mode of step 913. If the MS is not allocated the UL resource for transmitting the ACK message in step 905 and the timer (X) expires in step 907, the MS proceeds to the idle mode of step 913. In contrast, if the MS is not allocated the UL resource for transmitting the ACK message in step 905 and the timer (X) is not expired in step 907, the MS returns to step 905 and waits for the ACK message resource allocation.

FIG. 10 is a flowchart illustrating an operation of a BS to process a reception in response to an SMS message in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 10, in step 1001, the BS transmits an SMS message to the MS via a ranging response message. The ranging response message corresponds to the ranging response message of step 215. At this time, the BS can provide an identifier necessary for the MS to decode the UL resource for transmitting the ACK message via the ranging response message. In step 1003, the BS allocates the UL resources necessary for the MS to transmit the ACK message. In step 1005, the BS turns on the timer (Y). In step 1007, the BS identifies whether it has received an ACK message from the MS. If an ACK message is received from the MS, then in step 1011, the BS stops the timer (Y). In step 1013, the BS processes the received ACK message. Thereafter, in step 1015, the BS continues to manage the MS in idle mode. Alternatively, if the result of the recognition in step 1007 is that no ACK message is received from the MS, then in step 1009, the BS identifies whether the timer (Y) has expired. If the timer (Y) expires in a state where the ACK message is not received from the MS, the BS proceeds to step 1015 and continues to manage the MS in the idle mode, and the BS attempts the step again during a paging listening interval under the MS. 1001 SMS message transmission. In contrast, if the timer (Y) has not expired in a state where the ACK message is not received from the MS, the BS returns to step 1007 and waits for the ACK message to be received.

In the exemplary embodiment of FIG. 3, the description of the state in which the idle mode MS intends to transmit an SMS message is described. In this case, the STID and FID necessary for SMS message transmission and ACK message reception are allocated. Here, a method for an idle mode MS to transmit an SMS message without receiving an STID and an FID and receiving an ACK message is described.

11 is a flow chart illustrating an operation of an MS to process an SMS message in a wireless communication system in accordance with an exemplary embodiment of the present invention.

Referring to FIG. 11, if an SMS message to be transmitted is generated, then in step 1101, the idle mode MS performs a location update procedure for SMS message transmission (as in the case of FIG. 3). In step 1103, the MS receives a ranging response message from the BS. The ranging response message of step 1103 corresponds to the ranging response message received in step 311 of FIG. In step 1105, the MS turns on the timer (A) and waits for the BS to allocate the UL resources necessary for the transmission of the SMS message. In step 1107, the MS identifies whether the UL resources necessary for the transmission of the SMS message are allocated. If the UL resource is allocated, then in step 1111, the MS stops the timer (A). Here, the identification code for decoding the UL resource allocated to the MS may be allocated by the BS via the ranging response message of step 1101. Alternatively, the identification code is an identification code corresponding to the MS based idle mode identification code by means of information capable of identifying the MS, such as the paging period of the MS and the like. In step 1113, the MS transmits the SMS message using the allocated UL resources. The SMS message transmitted in step 1113 corresponds to the L2 transmission message of step 313 or corresponds to another L2 layer message (e.g., ranging request message). The FID included in the message header of the SMS message may be the FID assigned by the BS via the ranging response message in step 1103 or the FID predefined for the SMS message transmission. Thereafter, in step 1115, the MS receives an ACK message from the BS regarding the SMS message. Next, the MS proceeds to step 1117 and continues to perform the idle mode operation. On the other hand, if the MS is not allocated the UL resource for SMS message transmission in step 1107 and the timer (A) expires in step 1109, the MS returns to step 1101 and performs the location for the SMS message transmission again. Update process. In contrast, if the timer (A) has not expired in step 1109, the MS returns to step 1107 and waits for the UL resource allocation necessary for the transmission of the SMS message.

FIG. 12 is a flowchart illustrating an operation of a BS to process an SMS message in a wireless communication system, according to an exemplary embodiment of the present invention.

Referring to FIG. 12, in step 1201, the BS transmits a ranging response message to the MS that performs the location update procedure for the SMS message transmission. The ranging response message corresponds to the ranging response message of step 311. In step 1203, the BS allocates the UL resources necessary for transmitting the SMS message to the MS. In step 1205, the BS turns on the timer (B). The UL resource must be encoded with an identification code indicating the MS to indicate the assignment to the MS. The identification code may be assigned and transmitted by the BS via the ranging response message of step 1201, or may be configured in conjunction with the MS's paging period and the like to be based on the MS's idle mode identification code. In step 1207, the BS identifies whether an SMS message was received from the MS via the UL resource allocated in step 1203. If an SMS message is received in step 1207, then in step 1211, the BS stops the timer (B). In step 1213, the BS processes the SMS message. In step 1215, the BS transmits an ACK message regarding the SMS message to the MS. Next, the BS proceeds to step 1217 and continues to manage the MS in the idle mode. If the SMS message is not received in step 1207 and the timer (B) expires in step 1209, the BS proceeds to step 1217. In contrast, if the timer (B) has not expired in step 1209, the BS returns to step 1207 and waits for the SMS message to be received.

As described above, the present invention has the advantage of being able to transmit data without requiring unnecessary state transitions between idle mode and connected mode by providing SMS messages to idle mode MSs in a wireless communication system. The method and the method for transmitting an SMS message from the idle mode MS are achieved.

Although the present invention has been illustrated and described with reference to the preferred embodiments of the present invention, it will be understood by those skilled in the art, without departing from the scope of the invention as defined by the appended claims Various changes can be made in form and detail.

100. . . Mobile station (MS)

150. . . Base station (BS)

200. . . Mobile station (MS)

250. . . Base station (BS)

300. . . Mobile station (MS)

350. . . Base station (BS)

801. . . Radio frequency (RF) processor

803. . . Analog to digital converter (ADC)

805. . . Orthogonal Frequency Division Multiplexing (OFDM) Demodulation Transformer

807. . . decoder

809. . . Message processor

811. . . Controller

817. . . Message generator

819. . . Encoder

821. . . Orthogonal Frequency Division Multiplexing (OFDM) Modulator

823. . . Digital to analog converter (DAC)

825. . . Radio frequency (RF) processor

827. . . switch

829. . . Time controller

1 is a ladder diagram illustrating a Short Message Service (SMS) message transmission from a base station (BS) to an idle mode mobile station (MS) in a wireless communication system in accordance with the prior art.

2 is a ladder diagram illustrating a signal flow between a BS and an idle mode MS in a state where a BS transmits an SMS message to an idle mode MS in a wireless communication system, according to an exemplary embodiment of the present invention.

3 is a ladder diagram illustrating a signal flow between a BS and an idle mode MS in a state in which an idle mode MS transmits an SMS message to a BS in a wireless communication system, according to an exemplary embodiment of the present invention.

4 is a flow chart illustrating an operation of an MS to receive an SMS message in an idle mode in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation of a BS transmitting an SMS message to an idle mode MS in a wireless communication system, according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating an operation of an MS transmitting an SMS message in an idle mode in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

FIG. 7 is a flowchart illustrating an operation of a BS receiving an SMS message from an idle mode MS in a wireless communication system, according to an exemplary embodiment of the present invention.

8 is a block diagram illustrating a configuration of an apparatus for transmitting an SMS message to an idle mode MS/self-idle mode MS to receive an SMS message in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

9 is a flow diagram illustrating an operation of an MS to process a reception in response to an SMS message in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

FIG. 10 is a flowchart illustrating an operation of a BS to process a reception in response to an SMS message in a wireless communication system, in accordance with an exemplary embodiment of the present invention.

11 is a flow chart illustrating an operation of an MS to process an SMS message in a wireless communication system in accordance with an exemplary embodiment of the present invention.

FIG. 12 is a flowchart illustrating an operation of a BS to process an SMS message in a wireless communication system, according to an exemplary embodiment of the present invention.

200. . . Mobile station (MS)

250. . . Base station (BS)

Claims (24)

An operating method of a mobile station MS supporting a short message service SMS in a wireless communication system, the operating method comprising: receiving an SMS message from a base station BS via a ranging message in an idle mode, wherein the ranging message includes an indicator; After receiving the SMS message from the BS, the timer is turned on; when the timer is operated, based on an unsolicited manner, waiting for an uplink for transmitting an acknowledgement ACK message regarding the SMS message a UL resource allocation; determining, based on the indicator, a UL resource for the ACK message transmission; and transmitting the ACK message via the UL resource. The operating method of claim 1, wherein receiving the SMS message from the BS via the ranging message in the idle mode comprises: transmitting, by the paging message, from the BS during a paging listening interval Receiving a location update procedure request for SMS message reception; transmitting a ranging code to the BS, and receiving a response to the ranging code; transmitting a ranging request message to the BS; and receiving from the BS A ranging response message containing the SMS message. The method of operation of claim 2, wherein the ranging request message includes information indicating a location update process for the SMS information. The method of operation of claim 1, wherein the UL resource comprises a code division multiple access (CDMA) allocation A-MAP information element (IE). The method of operation of claim 1, wherein the identification code for decoding the allocation of the UL resource is configured based on an MS identification code used in the idle mode. The operating method of claim 1, wherein the flow identification code FID included in the media access control MAC header of the ACK message is received from the BS via the ranging response message, or A predefined FID for receiving responses to SMS messages. An operating method of a base station BS supporting a short message service SMS in a wireless communication system, the method comprising: transmitting an SMS message to a mobile station MS via a ranging message in an idle mode; and after transmitting the SMS message, turning on a timer; based on an unsolicited manner, allocating an uplink UL resource for transmitting an acknowledgement ACK message regarding the SMS message; and receiving the ACK regarding the SMS message a message, wherein the ranging message includes an indicator to determine an allocation of the UL resource. The method of claim 7, wherein the transmitting the SMS message via the ranging message comprises: transmitting, by the paging message, a location update process request for receiving the SMS message to the BS during the paging listening interval; Receiving a ranging code from the MS and transmitting a response to the ranging code; and receiving a ranging request message from the MS, and transmitting a ranging response message including the SMS message to the MS. The method of operation of claim 8, wherein the ranging request message includes information indicating a location update process for the SMS information. The method of operation of claim 7, wherein the UL resource comprises a code division multiple access (CDMA) allocation A-MAP information element (IE). The operating method of claim 7, wherein the identification code for decoding the allocation of the UL resource is configured based on an MS identification code used in the idle mode. The operating method of claim 7, wherein the flow identification code FID included in the media access control MAC header of the ACK message is received from the BS via the ranging response message, or A predefined FID for receiving responses to SMS messages. An apparatus for supporting a mobile station MS of a short message service SMS in a wireless communication system, the apparatus comprising: a transceiver for receiving an SMS message from a base station BS via a ranging response message in an idle mode, wherein the ranging The message includes an indicator, and the controller is configured to: after receiving the SMS message from the BS, start a timer, and when the timer operates, wait for transmission in an unsolicited manner Confirmation ACK of the SMS message An uplink UL resource allocation and based on the indicator to determine a UL resource for the ACK message transmission; and the transceiver transmits the ACK message via the UL resource. The device of claim 13, wherein the receiver receives a location update process request for SMS message reception from the BS via a paging message during a paging listening interval, and transmits the ranging code to the Receiving, by the BS, a response to the ranging code, and receiving a ranging response message including the SMS message from the BS; and wherein the transmitter transmits a ranging request message to the BS. The apparatus of claim 14, wherein the ranging request message includes information indicating a location update process for the SMS information. The apparatus of claim 13, wherein the UL resource comprises a code division multiple access (CDMA) allocation A-MAP information element (IE). The apparatus of claim 13, wherein the identification code for decoding the allocation of the UL resource is configured based on an MS identification code used in the idle mode. The device of claim 13, wherein the flow identification code FID included in the media access control MAC header of the ACK message is received from the BS via the ranging response message, or A predefined FID for SMS message receipt responses. An apparatus for supporting a base station BS of a short message service SMS in a wireless communication system, the apparatus comprising: a transceiver for transmitting an SMS message to the mobile station MS via a ranging message in an idle mode; and a controller for turning on a timer after transmitting the SMS message, and when the timer is operated, based on An uplink UL resource for transmitting an acknowledgement ACK message for the SMS message, the transceiver for receiving the ACK message regarding the SMS message, wherein the ranging message is allocated, in an unsolicited manner An indicator to determine the allocation of the UL resource is included. The device of claim 19, wherein the UL resource is a code division multiple access CDMA, and an A-MAP information element IE is allocated. The apparatus of claim 19, wherein the identification code for decoding the allocation of the UL resource is configured based on an MS identification code used in the idle mode. The device of claim 19, wherein the flow identification code FID included in the media access control MAC header of the ACK message is received from the BS via the ranging response message, or A predefined FID for SMS message receipt responses. The device of claim 19, wherein the transceiver transmits a location update procedure request for SMS message reception to the MS via a paging message in a paging listening interval, and transmits a response to the ranging code. And transmitting a ranging response message including the SMS message to the location Said MS; and wherein said transceiver receives said ranging code from said MS and receives a ranging request message from said MS. The apparatus of claim 23, wherein the ranging request message includes information indicating a location update process for the SMS information.