JP4435209B2 - Information processing device - Google Patents

Description

  The present invention relates to an information processing apparatus, and more particularly, to an information processing apparatus capable of waiting for execution of a command to a protocol layer used when performing wireless communication with an opposite device.

  In recent years, for example, Bluetooth (registered trademark) is known as a wireless communication technology that can be applied to, for example, electronic devices. If this Bluetooth wireless communication technology is used, audio data can be transferred from a mobile phone or the like to an opposite device such as a headset without using an audio cable.

This Bluetooth standard includes Bluetooth Specification Version 1.2 (Non-Patent Document 1), which is a specification that takes measures against interference with a 2.4 GHz wireless LAN (IEEE 802.11 / b / g), and EDR (high-speed function). Bluetooth Specification Version2 + EDR (Non-Patent Document 2), which is a specification adopting Enhanced Data Rate, is known.
Bluetooth Specification Version1.2 (Bluetooth SIG) Bluetooth Specification Version2 + EDR (Bluetooth SIG)

  By the way, when the next connection request is received from an upper layer while the disconnection process is being executed between the mobile phone and the headset as the opposite device, the connection process based on the connection request is executed. There is a possibility that the disconnection process already being executed and the connection process started later will collide, and the connection process started later will fail. In addition, regarding processing other than disconnection processing, if physical connection by the physical layer remains, the logical connection by the logical layer can be established and used to execute the processing. Requests for processing are uniformly queued in the command queue so that they can be executed without waiting for completion of the previous processing, but command queues for canceling processing that has already been executed based on the previous request. If it is queued, the cancellation process will be delayed.

  In this way, depending on the nature of the processing (for example, connection processing or disconnection processing) executed in the mobile phone when performing wireless communication between the mobile phone and the headset as the opposite device, and the execution status thereof, There has been a problem that it is difficult to appropriately execute processing based on the instructed request.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide an information processing apparatus that can suitably manage loading of a request received from an upper layer into a command queue.

  In order to solve the above-described problem, an information processing apparatus according to the present invention includes a wireless communication control unit that performs wireless communication with a counterpart device by controlling a physical layer and a logical layer, and the wireless communication control unit. A command queue for storing a command for controlling connection and disconnection of the physical layer, a command for instructing processing to the opposite device via the physical layer and a logical layer, and a process being executed by the command are stopped. It is determined whether the request is a command, and if it is determined that the command is to cancel the process being executed, the command is not stored in the command queue, and the physical connection with the opposite device is made to the wireless communication control unit Forcibly disconnecting control means for instructing disconnection, and the wireless communication control means receives the instruction from the forced disconnection control means, The connection of the physical layer are established in, with cutting by generating a link loss, after cleavage of the physical layer, and executes the disconnection process of the logical layer.

  In the information processing apparatus of the present invention, wireless communication with the counterpart device is performed by controlling the physical layer and the logical layer, and a command for controlling connection and disconnection of the physical layer, the physical layer and the logical layer Commands for instructing processing to the opposite device are stored, it is determined whether or not the command is a request to stop the processing being executed, and if it is determined that the command is to stop the processing being executed, If this command is not stored in the command queue and an instruction is given to disconnect the physical connection with the opposite device, and the instruction is received, the physical layer connection established with the opposite device causes a link loss. In addition, the logical layer is cut after the physical layer is cut.

  According to the present invention, it is possible to suitably manage loading of a request received from an upper layer into a command queue.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, in the vicinity of a mobile phone 1, a headset 2 that can be applied as a counter device according to the present invention is arranged. The headset 2 can receive audio data transferred from the mobile phone 1 using wireless communication (for example, Bluetooth) and reproduce it in real time. In addition to the headset 2, an in-vehicle device (not shown) may be used as the opposing device.

  FIG. 2 shows an internal configuration of the mobile phone 1 of FIG. As shown in FIG. 2, the mobile phone 1 includes a control unit 11, a display unit 12, an input unit 13, a storage unit 14, a radio telephone communication unit 15, a signal processing unit 16, a PCM codec 17, a microphone 18, a speaker 19, A media player unit 20, a content processing unit 21, a short-range wireless communication unit 22, and a forced interruption unit 23 are connected to each other via a bus 24.

  The control unit 11 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU is loaded into the RAM from a program stored in the ROM or the storage unit 14. Various processes are executed in accordance with various application programs, and various control signals are generated and supplied to each unit to control the mobile phone 1 in an integrated manner. The RAM appropriately stores data necessary for the CPU to execute various processes.

  The display unit 12 includes, for example, an LCD (Liquid Crystal Display), and the input unit 13 includes operation keys and operation buttons (not shown).

  The radio telephone communication unit 15 receives a radio signal transmitted from a base station (not shown) via an antenna (not shown), down-converts the received radio signal to obtain an intermediate frequency signal, and further performs orthogonal demodulation. Processing, despreading and combining processing of each path by a RAKE receiver (not shown) are performed. Thereafter, the received packet data output from the RAKE receiver is input to the signal processing unit 16.

  The signal processing unit 16 includes, for example, a DSP (Digital Signal Processor) and the like, and includes a speech codec that performs encoding / decoding of an audio signal transmitted / received via the wireless telephone communication unit 15.

The digital audio signal obtained by such decoding processing is PCM decoded by the PCM codec 17, amplified and output from the speaker 19. On the other hand, the audio signal input from the microphone 18 is modulated into a digital audio signal by the PCM codec 17 and input to the speech codec.

  The media player unit 20 executes a music player function for reproducing audio data, for example. Of course, the mobile phone 1 is provided with a terrestrial digital one seg / radio receiver, for example, various functions such as a terrestrial digital one seg player function by executing an application program when receiving a terrestrial digital one seg broadcast wave. A media player may be executed.

  The content processing unit 21 includes a decoder and an encoder. When the media player unit 20 controls the music player function, for example, the decoder performs encoding (encoding) using an encoding method such as AAC, aacPlus, MP3, ATRAC, or SBC. ) Audio data is once decoded by a decoding method corresponding to the encoding method. Then, the encoder of the content processing unit 21 performs re-encoding processing or the like on the analog audio data decoded (decoded) by the decoder using another encoding method.

  In addition, when the media player unit 20 executes the one-segment player function, in addition to the audio data encoding / decoding process such as the AAC, MPEG4 or H.264 is performed. The encoding and decoding processes may be performed using an encoding method and a decoding method such as H.264.

  The short-range wireless communication unit 22 includes, for example, a module that performs wireless communication using Bluetooth (registered trademark), and performs wireless communication with the headset 2 that exists in the vicinity of the mobile phone 1. Of course, wireless communication other than Bluetooth (for example, infrared communication) may be used. The near field communication unit 22 includes a protocol layer control unit 25, a command queue 26, a request management unit 27, and the like.

  The protocol layer control unit 25 controls a protocol layer (a logical layer and a physical layer) used when short-range wireless communication is performed with the headset 2 that is the opposite device. In particular, the protocol layer control unit 25 not only manages the physical connection by the physical layer in the short-range wireless communication performed with the headset 2 which is the opposite device, but also between the headset 2 which is the opposite device. The logical connection by the logical layer in the near field communication to be performed is managed.

  The command queue 26 queues a command (request) to the protocol layer controlled by the protocol layer control unit 25 and temporarily waits for execution of the command (request). When the request management unit 27 sequentially receives requests from an upper layer (application layer or API (Application Program Interface) layer), the request management unit 27 appropriately loads the received requests (commands) into the command queue 26 and receives the received requests (commands). The loading to the command queue 26 is managed.

  The forced interruption unit 23 is a headset 2 that is an opposing device when a forced interruption factor such as an incoming call interruption occurs in a weak electric field such as when the distance between the mobile phone 1 and the headset 2 increases. The protocol layer control unit 25 is instructed to disconnect the physical connection with the headset 2 to forcibly disconnect the physical connection with the headset 2 that is the opposite device.

  By the way, when the situation between the mobile phone 1 and the headset 2 becomes a weak electric field due to a decrease in the electric field strength between the mobile phone 1 and the headset 2 as the opposite device, the mobile phone 1 There may be a case where it is difficult to receive a response to the connection request transmitted to the headset 2 (that is, it usually takes a few seconds if the response can be received in 1 second). In such a case, even if it is desired to make a disconnection request from the mobile phone 1 side, the connection between both devices cannot be immediately disconnected.

  Therefore, the physical connection with the headset 2 is forcibly disconnected without performing a logical disconnection procedure by the normal protocol layer control unit 25. As a result, even when a weak electric field is present with the headset 2, the connection with the headset 2 can be immediately disconnected when a forced interruption factor occurs.

  However, in general, regarding processes other than the disconnection process, if a physical connection by the physical layer remains, the logical connection by the logical layer can be established and executed by using the physical connection. Therefore, requests (commands) relating to the processing are uniformly queued in the command queue 26 so that the processing can be executed without waiting for completion of the previous processing. For example, as shown in FIG. 3, when a device name acquisition request is issued for the headset 2 which is the opposite device by operating the input unit 13 by the user, the application layer, API layer, logical layer, and After a device name acquisition request (“name-request”) is transmitted to the headset 2 via the short-range wireless communication unit 22 using the physical layer (steps S1 to S4 in FIG. 3), a service search for the headset 2 is performed. When a request is issued, a request (command (“Service Search-request”)) related to that process is executed in the command queue so that the service search request can be executed without waiting for the completion of the previous device name acquisition request process. 26 (steps S5 to S8 in FIG. 3). However, a request (forced suspension request) for canceling a process already executed based on a previous request (for example, a “Service Search-request” or “name-request” command) is queued in the command queue 26. Then, the cancellation process is delayed.

  Therefore, when a request is sequentially received from an upper layer (an application layer or an API (Application Program Interface) layer), a command is or may not be loaded into the command queue 26 according to the nature of the received request (command). To do. Thereby, it is possible to suitably manage the loading of a request received from an upper layer into the command queue. Therefore, the processing based on the instructed request can be suitably executed according to the nature of the processing executed when performing wireless communication with the headset 2 and the execution status thereof. The request management process using this method will be described below.

  A request management process in the mobile phone 1 of FIG. 2 will be described with reference to the flowchart of FIG. This forced interruption process is started when a forced interruption instruction such as an instruction to cancel a process based on a request that is already being executed is given. FIG. 5 shows a specific processing sequence between the mobile phone 1 and the headset 2 when executing the request management processing described with reference to the flowchart of FIG.

  In step S11, during the establishment of a connection between the mobile phone 1 and the headset 2, a forced interruption factor such as an instruction to cancel processing (forced interruption instruction) based on an already executed request is generated. Specifically, as shown in FIG. 5, a service search request for the headset 2 is instructed, and the service search request is transmitted to the headset 2 via the short-range wireless communication unit 22 and is based on the service search request. During execution of the process (steps S21 to S27 in FIG. 5), the user cancels the process by operating the input unit 13 to cancel the process (forcibly interrupted instruction). A forced interruption factor occurs (step S28 in FIG. 5). At this time, the application program controlled by the control unit 11 instructs the forced interruption unit 23 to cancel the processing based on the service search request (step S29 in FIG. 5).

  In step S12, the forced interruption unit 23 performs physical communication with the headset 2 that is the opposite device when a forced interruption factor such as an instruction to cancel processing based on a request that is already being executed (forced interruption instruction) occurs. The disconnection of the connection is instructed to the protocol layer control unit 25 as a lower layer, and the physical connection with the headset 2 which is the opposite device is forcibly disconnected (step S30 in FIG. 5).

  At this time, in step S13, the request management unit 27 loads the forced interruption instruction (request) into the command queue 26 because the processing based on the forced interruption instruction (request) from the forced interruption unit 23 is cancellation processing. Absent.

  In step S <b> 14, the protocol layer control unit 25 issues a disconnection request for requesting disconnection of the physical connection between the mobile phone 1 and the headset 2 in accordance with the forcible interruption instruction from the forcible interruption unit 23. The data is transmitted to the headset 2 via 22. The short-range wireless communication unit 22 transmits this disconnection request (disconnection request for requesting disconnection of the physical connection between the mobile phone 1 and the headset 2) to the headset 2 according to the management of the protocol layer control unit 25. (Step S31 in FIG. 5). At this time, a disconnection request is transmitted to the headset 2, and a notification that this disconnection is normal disconnection is also transmitted to the headset 2. Thereby, even if the forced interruption of the physical connection by the forced interruption unit 23 is executed, the headset 2 can recognize that the disconnection is normal.

  In step S <b> 15, the short-range wireless communication unit 22 receives a disconnection response that is a response corresponding to the disconnection request from the headset 2. In step S16, the physical connection between the mobile phone 1 and the headset 2 is forcibly disconnected. In step S17, the protocol layer control unit 25 then detects a link loss in which the physical connection with the headset 2 is disconnected. In step S18, the protocol layer control unit 25 disconnects the link loss (the physical connection with the headset 2 is disconnected). Is detected), the logical layer as the upper layer (logical layer) is notified that the disconnection of the physical connection has been completed (steps S33 to S34 in FIG. 5).

  Thereafter, in step S19, the protocol layer control unit 25 uses a predetermined logical connection procedure in accordance with the notification that the disconnection of the physical connection from the logical layer is completed, and performs a logical operation between the mobile phone 1 and the headset 2. Connection disconnection processing is executed (step S35 in FIG. 5).

  In the embodiment of the present invention, the protocol layer used when performing wireless communication with the headset 2 as the opposite device is controlled, and the command queue 26 waits for execution of a command to the controlled protocol layer. In addition, it manages the loading of requests received sequentially from the upper layer into the command queue, and requests the protocol layer control unit 25 to disconnect the physical connection with the headset 2 when a forced interruption factor occurs. The physical connection with the headset 2 can be disconnected using the protocol layer control unit 25. At this time, when the forced suspension request by the forced suspension unit 23 is received, the request management unit 27 causes the forced suspension unit 23 to execute the forced suspension process without loading the forced suspension request into the command queue 26. Can do.

  As a result, when a forced interruption factor such as an instruction to cancel a process based on a request that is already being executed (forced interruption instruction) occurs while establishing a connection between the mobile phone 1 and the headset 2, The cancel process can be executed immediately without going through the command queue 26, and the connection with the headset 2 can be immediately disconnected when a forced interruption factor occurs. Therefore, it is possible to suitably manage loading of requests received from the upper layer into the command queue, and depending on the nature of the processing executed when performing wireless communication with the headset 2 and the execution status thereof The processing based on the instructed request can be suitably executed. As a result, it is possible to improve convenience when performing short-range wireless communication between the mobile phone 1 and the headset 2.

  Although the cancellation instruction is explicitly described as the forced interruption factor, it is not limited to such a case, and can be applied to the case where other forced interruption factors such as an incoming interrupt or a stop request occur. .

  By the way, when the next connection request is received from the upper layer (application or API layer) while the disconnection process is being executed between the mobile phone 1 and the headset 2 as the opposite device, the connection request is based on the connection request. If the connection process is executed, the disconnection process that is already being executed and the connection process that is started later may collide, and the connection process that is started later may end in failure.

  Therefore, when a request is sequentially received from an upper layer (an application layer or an API (Application Program Interface) layer), a command is or may not be loaded into the command queue 26 according to the nature of the received request (command). In addition, the loading of the accepted request (command) into the command queue 26 according to the execution status may be temporarily delayed. Thereby, it is possible to more suitably manage the loading of the request received from the upper layer into the command queue. As a result, the processing based on the instructed request can be suitably executed according to the nature of the processing executed when performing wireless communication with the headset 2 and the execution status thereof. The request management process using this method will be described below.

  With reference to the flowchart of FIG. 6, another request management process in the mobile phone of FIG. 2 will be described. FIG. 7 shows a specific processing sequence between the mobile phone 1 and the headset 2 when executing the request management processing described with reference to the flowchart of FIG.

  In step S41, when the disconnection request is instructed by the user operating the input unit 13, the disconnection request is instructed to the protocol layer control unit 25 from the application program controlled by the control unit 11 (FIG. 7). Steps S51 to S54).

  In step S <b> 42, the protocol layer control unit 25 causes the headset 2 to transmit a disconnection request for requesting disconnection of the physical connection between the mobile phone 1 and the headset 2 via the short-range wireless communication unit 22. The short-range wireless communication unit 22 transmits this disconnection request (disconnection request for requesting disconnection of the physical connection between the mobile phone 1 and the headset 2) to the headset 2 according to the management of the protocol layer control unit 25. (Step S55 in FIG. 7).

  Next, in step S43, the control unit 11 receives a connection request instruction during the disconnection process by instructing a connection request by operating the input unit 13 by the user (step S56 in FIG. 7). . When a connection request is instructed by the user operating the input unit 13, a connection request is instructed to the API layer from an application program controlled by the control unit 11 (step S57 in FIG. 7).

  At this time, if a connection request is instructed from the application program controlled by the control unit 11 to the API layer, the connection request is immediately instructed from the API layer to the protocol layer control unit 25 to control the protocol layer control. The connection processing based on the connection request is executed in the unit 25 (steps a to e in FIG. 7). Then, in general, the physical layer waits for the completion of the previous processing to execute the connection request, but if the previous processing is a disconnection request, even if the processing completion wait is based on the assumption that a physical connection exists, As a result of the completion of the previous disconnection process, the physical connection is lost, and eventually this connection request is indirectly failed by the previous disconnection process.

  Therefore, in step S44, the request management unit 27 waits for the connection request to be loaded in the command queue 26 until the disconnection process based on the disconnection request is completed, and temporarily delays the loading (step S59 in FIG. 7). In step S45, the request management unit 27 determines whether or not the cutting process is completed by receiving a disconnection response from the headset 2 via the short-range wireless communication unit 22, and determines that the cutting process is completed. Wait until the connection request is loaded into the command queue.

  If it is determined in step S45 that the disconnection process has been completed, a connection request is instructed from the API layer controlled by the control unit 11 to the protocol layer control unit 25 in step S46, and the request management unit 27 receives a connection request in step S47. Are loaded into the command queue 26 (steps S60 to S63 in FIG. 7).

  In step S <b> 48, the protocol layer control unit 25 causes the headset 2 to transmit a connection request for requesting a connection between the mobile phone 1 and the headset 2 via the short-range wireless communication unit 22. The short-range wireless communication unit 22 transmits this connection request to the headset 2 according to the management of the protocol layer control unit 25 (step S64 in FIG. 7).

  As a result, it can be avoided that the disconnection process that is already being executed and the connection process that has been started later collide, and the connection process that has been started later will fail. It is possible to better manage the loading of the requested request to the command queue. Therefore, the processing based on the instructed request can be suitably executed according to the nature of the processing executed when performing wireless communication with the headset 2 and the execution status thereof. As a result, it is possible to improve convenience when performing short-range wireless communication between the mobile phone 1 and the headset 2.

  When a request other than the connection request is received from the upper layer during the disconnection process, the next request is instructed to the lower layer without temporarily delaying loading into the command queue 26 and based on the request. You may make it perform a process.

  The present invention can be applied to a PDA (Personal Digital Assistant), a personal computer, a portable game machine, a portable music player, a portable video player, and other information processing information processing apparatuses in addition to the cellular phone 1. can do.

  The series of processes described in the embodiments of the present invention can be executed by software, but can also be executed by hardware.

  Furthermore, in the embodiment of the present invention, the steps of the flowchart show an example of processing performed in time series in the order described, but parallel or individual execution is not necessarily performed in time series. The processing to be performed is also included.

1 is a diagram showing a schematic configuration of an information exchange system according to the present invention. 1 is a block diagram showing an internal configuration of a mobile phone applicable to an information processing apparatus of the present invention. The sequence diagram which shows the sequence of the specific process between a mobile telephone and a headset. The flowchart explaining the request management process in the mobile telephone of FIG. FIG. 5 is a sequence diagram showing a specific processing sequence between a mobile phone and a headset when executing a request management process described with reference to the flowchart of FIG. 4. The flowchart explaining the other request | requirement management processing in the mobile telephone of FIG. FIG. 7 is a sequence diagram showing a specific processing sequence between a mobile phone and a headset when executing a request management process described with reference to the flowchart of FIG. 6.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile telephone, 2 ... Headset, 11 ... Control part, 12 ... Display part, 13 ... Input part, 14 ... Memory | storage part, 15 ... Radio telephone communication part, 16 ... Signal processing part, 17 ... PCM codec, 18 ... Microphone, 19 ... speaker, 20 ... media player unit, 21 ... content processing unit, 22 ... near field communication unit, 23 ... forced interruption unit, 24 ... bus, 25 ... protocol layer control unit, 26 ... command queue, 27 ... Request management department.

Claims (2)

Wireless communication control means for performing wireless communication with the opposing device by controlling the physical layer and the logical layer;
A command queue for storing a command for controlling connection and disconnection of the physical layer by the wireless communication control means, a command for instructing processing to the opposite device via the physical layer and a logical layer;
It is determined whether or not the command is a request for canceling the process being executed. If it is determined that the command is a command for canceling the process being executed, the wireless communication control unit does not store the command in the command queue. Forcibly disconnecting control means for instructing to disconnect the physical connection with the opposite device,
Upon receiving the instruction from the forced disconnection control unit, the wireless communication control unit disconnects the physical layer connection established with the opposing device by generating a link loss, and the physical layer An information processing apparatus that performs the logical layer cutting process after cutting. Storage control means for delaying the storage of commands in the command queue is further provided, and when the storage control means receives a command requesting connection to the opposite device to be stored in the command queue, the wireless communication control Check whether the physical layer disconnection process established with the opposite device is executed by the means, and if the disconnection process is executed, store the received command requesting connection in the command queue The information processing apparatus according to claim 1, wherein the information processing apparatus is delayed until the physical layer cutting process is completed.

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