WO2011142312A1 - リモート型携帯通信システム、サーバ装置及びリモート型携帯通信システム制御方法 - Google Patents
リモート型携帯通信システム、サーバ装置及びリモート型携帯通信システム制御方法 Download PDFInfo
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Classifications
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- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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Definitions
- the present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2010-108669 (filed on May 10, 2010), the entire contents of which are incorporated herein by reference. Shall.
- the present invention relates to a remote mobile communication system, a server device, and a remote mobile communication system control method, and in particular, accesses a virtual client on a server via a mobile network, as if it is a terminal itself.
- the present invention relates to a remote mobile communication system, a thin client server device, and a remote mobile communication system control method for instructing and operating a client.
- LTE Long Term Evolution
- EPC Evolved Packet Core
- Patent Document 1 discloses a thin client system that can be used from both a local environment and a remote environment with a simple configuration.
- Patent Document 2 describes a method for optimizing a rate control method by exchanging signaling information in a mobile network.
- Patent Document 3 discloses a color image data transfer system having an optimum display quality and drawing performance corresponding to a network load that changes every moment in a screen transfer method thin client.
- Patent Document 4 describes a client device that enables image data downloaded from a server device to be stored with sufficient image quality and viewed offline in a thin client terminal.
- An object of the present invention is to provide a remote mobile communication system, a server device, and a remote mobile communication system control method that solve such problems.
- the server device provides: A storage unit for receiving content storage instruction information from a mobile terminal via a packet transfer device on a mobile network and storing the content stream or content file when receiving the content stream or content file; A virtual client unit that receives a content playback instruction information from a portable terminal, reads a content stream or a content file stored in the storage unit, decodes and reproduces the content stream, and generates a display screen; And an encoder unit that sends out, as a packet, an encoding result obtained by compressing and encoding all or part of the display screen.
- the remote mobile communication system includes the server device according to the first aspect.
- the remote portable communication system control method is: A server device on a mobile network receives content storage instruction information from a portable terminal via a packet transfer device on the mobile network, receives a content stream or content file, and stores the content stream or content file in its storage unit The process of accumulating in Receiving content playback instruction information from the mobile terminal, reading out the content stream or content file stored in the storage unit, decoding and playing back, and generating a display screen; And a step of sending an encoded result obtained by compressing and encoding all or part of the display screen as a packet to the packet transfer apparatus.
- content can be used without changing the mobile terminal when the content size in the mobile network increases.
- a remote portable communication system According to the first deployment mode, a remote portable communication system according to the first aspect is provided.
- the frequency of the retransmission request received from the mobile terminal for the transmitted packet is measured, and at least one of the bit rate and the frame rate of compression encoding by the encoder unit is based on the measurement result
- a server device is further provided that further includes a rate control unit that controls the server.
- the rate control unit reduces the maximum bit rate or the maximum frame rate of compression encoding by the encoder unit when the number of retransmission requests received in a predetermined period is equal to or greater than a predetermined threshold.
- a server device is provided.
- a server device that, when the rate control unit receives a retransmission request from the mobile terminal, retransmits the corresponding packet.
- a server device in which the encoder unit takes the encoded result as a packet and sends it to the packet transfer device using the UDP protocol.
- the remote mobile communication system according to the second aspect is provided.
- the remote mobile communication system further includes a mobile terminal that receives a packet transmitted from a server device via a packet transfer device and decodes and displays an encoding result stored in the packet. Is provided.
- a remote mobile communication system in which the mobile network is a mobile packet network or a mobile LTE / EPC network.
- the remote portable communication system control method according to the third aspect is provided.
- the step of measuring the frequency of the retransmission request received from the mobile terminal for the transmitted packet and controlling at least one of the bit rate and the frame rate of the compression encoding based on the measurement result A remote mobile communication system control method is further provided.
- the new service when an operator introduces a new service, the new service can be introduced by updating the application software of the server device installed on the network. Therefore, it is not necessary to procure or remodel a mobile terminal every time a new service is introduced.
- the storage unit (cache memory, hard disk storage, etc.) provided in the server device on the network can be used to store content such as still images, especially moving images, content files, etc. Device). Therefore, even if the content or content file is destroyed due to a failure of the mobile terminal, or when the mobile terminal is misplaced or stolen, the content, content file, etc. are lost and cannot be accessed. .
- the packet when the stored content is played back or browsed, the packet in the case of UDP / IP during the call connection or during the call connection against the fluctuation of the bandwidth of the mobile packet network or the LET / EPC network. It is possible to control the maximum bit rate when the number of retransmission requests is measured by the server device and the screen information is compression-encoded based on the measurement result. Therefore, it takes time to receive information on the mobile terminal side, and it is possible to avoid a decrease in QoE due to a slow screen update.
- FIG. 1 shows a connection configuration of apparatuses in a remote portable communication system according to the present embodiment.
- FIG. 1 shows a configuration when a 3G mobile packet network 150 is used as a mobile network and an xGSN device 190 is used as a packet transfer device.
- the xGSN device 190 refers to a device in which an SGSN (Serving GPRS Support Node) device and a GGSN (Gateway GPRS Support Node) device are integrated.
- SGSN Serving GPRS Support Node
- GGSN Gateway GPRS Support Node
- FIG. 1 shows an example of a service on a server of a mobile network so as to store still images / videos, content such as audio, content files, etc. taken by an end user with a camera of a mobile terminal on a mobile terminal.
- the content stored in the cache memory or storage device of the virtual client on the server, and then the content stored in the cache memory or storage device of the virtual client on the server is displayed on the mobile terminal so as to reproduce and display the content stored in the mobile terminal.
- a configuration in the case of providing a service to do is shown. It should be noted that services can be provided not only for contents but also for games, applications, and other cases based on the same configuration.
- the mobile terminal 170 performs a base station 194, RNC (RNC) in order to perform an operation for accumulating contents with respect to a virtual client included in the thin client server apparatus 110 arranged on the mobile packet network 150.
- RNC Radio Network Controller
- An instruction signal to be stored is sent to the thin client server device 110 via the Radio Network Controller) device 195 and the xGSN device 190.
- the instruction signal refers to a signal transmitted from the mobile terminal 170 when a key press operation on the mobile terminal 170, an input operation of a special character (for example, *, #, etc.) or the like is performed.
- a special character for example, *, #, etc.
- the instruction signal transmitted from the mobile terminal 170 arrives in the order of the base station 194, the RNC device 195, the xGSN device 190, and the thin client server device 110 provided on the mobile packet network 150. Thereby, the thin client server device 110 receives the instruction signal from the portable terminal 170.
- a known protocol can be used as a protocol for sending the instruction signal.
- TCP / IP and HTTP are used as its upper layer.
- SIP Session Initiation Protocol
- SIP Session Initiation Protocol
- FIG. 2 is a block diagram showing the configuration of the thin client server device 110.
- the thin client server device 110 includes a virtual client unit 211, a screen capture unit 180, an encoder unit 186, a packet construction / transmission unit 176, a cache memory (storage unit) 189, and a packet reception unit 188.
- the virtual client unit 211 includes application software corresponding to a new service, an audio / still image / video decoder, a screen generation unit, and the like (not shown).
- the application software can be easily changed from outside the thin client server device 110.
- the virtual client unit 211 receives a TCP packet as an accumulation instruction signal from the mobile terminal 170 via the base station 194, the RNC device 195, and the xGSN device 190.
- the virtual client unit 211 analyzes HTTP received on the received TCP packet, and recognizes that an operation of storing content in the thin client server device 110 is performed.
- the virtual client unit 211 executes an application for performing content accumulation in accordance with an instruction signal from the mobile terminal, generates an application screen indicating operation details, and outputs the application screen to the screen capture unit 180. .
- the screen capture unit 180 captures the screen, converts it into an image luminance signal and a color difference signal, and outputs them to the encoder unit 186.
- a YUV format or the like can be used as another format.
- the encoder unit 186 receives an image signal or a still image signal of a predetermined fps (the number of frames per second, frame per second) as a screen signal from the screen capture unit 180. Further, the encoder unit 186 compresses and encodes the image signal output from the screen capture unit 180 by a predetermined compression method so as not to exceed a predetermined maximum bit rate, and generates a compression encoded bit stream. It is generated and sent to the packet construction / transmission unit 176.
- a predetermined fps the number of frames per second, frame per second
- a compression encoding method based on Wavelet that is effective for compression encoding of a mixed screen of still images and moving images is used. Note that other known compression encoding methods can also be employed.
- the packet construction / transmission unit 176 stores the compression-encoded bit stream in the payload of the packet and sends it to the xGSN device 190 using the TCP / IP protocol.
- the compression-encoded bitstream can be temporarily stored in a file, and then the file can be transmitted in packets.
- the mobile terminal 170 receives a packet sent from the thin client server device 110 via the xGSN device 190 or the like, and converts the compressed encoded bit stream stored in the packet payload into a thin client.
- a screen obtained by decoding with a decoder corresponding to the encoder unit 186 in the server apparatus 110 is displayed. Further, the mobile terminal 170 starts accumulation of content streams or content files with respect to the thin client server device 110.
- the packet receiving unit 188 receives a packet storing a content stream to be accumulated or a content file to be accumulated from the mobile terminal 170, extracts a content stream or a content file from the payload portion of the packet, Are stored in the cache memory 189.
- the cache memory 189 When the accumulation of the content stream or the content file is completed, the cache memory 189 notifies the virtual client unit 211 of the completion.
- the virtual client unit 211 When the virtual client unit 211 receives the completion notification, the virtual client unit 211 generates a storage end screen and outputs the screen to the screen capture unit 180.
- the screen capture unit 180 captures the screen.
- the encoder unit 186 encodes the captured screen and outputs the encoded result to the packet construction / transmission unit 176.
- the packet construction / transmission unit 176 constructs a TCP / IP packet and outputs it to the xGSN device 190.
- the mobile terminal 170 receives these packets.
- the virtual client unit 211 When the virtual client unit 211 receives content reproduction instruction information from the mobile terminal 170 via the xGSN device 190, the virtual client unit 211 reads the stream or file of the corresponding content from the content stored in the cache memory 189 and compresses it with the mobile terminal 170.
- the content stream or file is decoded and reproduced using a decoding method corresponding to the encoded encoding method, and a display screen is generated and output to the screen capture unit 180.
- the screen capture unit 180 captures the screen, converts it into a luminance signal and a color difference signal of the image, and outputs them to the encoder unit 186.
- other formats such as a YUV format can also be used.
- the encoder unit 186 receives an image signal or a still image signal of a predetermined fps (the number of frames per second, frame per second) as a screen signal from the screen capture unit 180. Further, the encoder unit 186 compresses and encodes the image signal output from the screen capture unit 180 by a predetermined compression method so as not to exceed a predetermined maximum bit rate, and generates a compression encoded bit stream. It is generated and sent to the packet construction / transmission unit 176.
- a predetermined fps the number of frames per second, frame per second
- the packet construction / transmission unit 176 stores the compression-encoded bit stream in the payload portion of the packet and sends it to the xGSN device 190 using the TCP / IP protocol.
- the compression-encoded bitstream can be temporarily stored in a file, and then the file can be transmitted as a TCP / IP packet.
- the xGSN device 190 encapsulates the received TCP / IP packet by the GTP-U protocol and transfers it to the RNC device 195.
- the RNC device 195 transmits to the mobile terminal 170 wirelessly via the base station 194.
- the mobile terminal 170 receives a packet according to the TCP / IP protocol, and extracts a compression-coded stream or file stored in the payload portion of the packet.
- the mobile terminal 170 has a decoder corresponding to the encoder unit 186 of the thin client server device 110, and the decoder decodes the compression-encoded stream, or extracts and decodes the stream stored in the file,
- the screen obtained by decoding is displayed on the display of the portable terminal 170.
- the contents stored from the portable terminal 170 are not limited to still images / moving pictures, but various contents such as music / audio, files, programs, and the like can be stored.
- the xGSN device 190 may be arranged separately into an SGSN device and a GGSN device.
- the cache memory 189 is used as the storage unit in the thin client server device 110, a storage device such as a hard disk may be used.
- the configuration using TCP / IP as the packet protocol transmitted from the thin client server device 110 to the xGSN device 190 has been described.
- a configuration using UDP / IP instead of TCP / IP will be described.
- the transfer delay time in the mobile network can be shortened compared to the case of using TCP / IP.
- measures against packet loss are required.
- FIG. 3 is a diagram showing a connection configuration of apparatuses in the remote mobile communication system according to the present embodiment.
- the operation of the component having the same reference numeral as that of the component in FIG. 1 is the same as the operation of the component in FIG.
- the configuration shown in FIG. 3 is different from the configuration shown in FIG. 1 in the following points (1) to (3).
- the thin client server device 510 sends a UDP / IP packet to the xGSN device 190.
- a unique or general-purpose sequence number is assigned to the UDP packet.
- the mobile terminal 570 receives the UDP / IP packet transmitted from the thin client server device 510 via the xGSN device 190, the RNC device 195, and the base station 194.
- the portable terminal 570 checks the unique or general-purpose sequence number added to the UDP / IP packet to confirm whether there is a packet loss of the UDP packet. If the sequence numbers are continuous and there is no packet loss, the mobile terminal 570 extracts the bit stream or file stored in the payload portion of the UDP packet, decodes it, and then displays the display of the mobile terminal 570 To display. On the other hand, if the sequence number has jumped (becomes discontinuous) and packet loss is considered to have occurred, the portable terminal 570 requests the thin client server device 510 to retransmit the lost packet.
- FIG. 4 is a block diagram showing a configuration of the thin client server device 510.
- the operation of the component having the same reference numeral as that of the component of FIG. 2 is the same as the operation of the component of FIG.
- the packet construction / transmission unit 576 stores the compression-encoded bit stream from the encoder unit 186 in the payload of the UDP packet, adds a unique or general-purpose sequence number, and uses the UDP / IP protocol. , XGSN device 190.
- the packet construction / transmission unit 576 may temporarily store the compression-encoded bitstream in a file and then send the file in a packet.
- UDP / IP can be used as an example of the packet protocol in this case.
- the retransmission control unit 595 receives a retransmission request signal from the virtual client unit 511 via the xGSN device 190 when the mobile terminal 570 requests retransmission.
- Retransmission control section 595 determines the sequence number from the retransmission request instruction and outputs the determined sequence number to packet construction / transmission section 576.
- the packet construction / transmission unit 576 retransmits the UDP / IP packet having the corresponding sequence number to the xGSN device 190 in accordance with the instruction from the retransmission control unit 595.
- the rate control unit 585 counts the number of retransmission request instructions received from the virtual client unit 511 within a predetermined time interval, and obtains a cumulative value C accumulated in the predetermined time interval. Further, the rate control unit 585 controls the maximum bit rate Emax in the encoder unit 186 by comparing the obtained accumulated value C with a predetermined threshold Th2.
- the rate control unit 585 reduces the maximum bit rate Emax as shown in equation (2).
- Equation (2) ⁇ 3 is a predetermined constant.
- the rate control unit 585 returns the maximum bit rate Emax to the initial value.
- the rate control unit 585 outputs the maximum bit rate Emax thus determined to the encoder unit 186.
- FIG. 4 explains the case of controlling the maximum bit rate.
- the configuration similar to that in FIG. 4 can also be applied to frame rate control.
- the contents stored from the mobile terminal are not limited to still images / moving pictures, but various contents such as music / audio, files, and programs can be stored.
- the xGSN device 190 may be arranged separately into an SGSN device and a GGSN device.
- the cache memory 189 is used as the storage unit in the thin client server device 510, a storage device such as a hard disk may be used.
- FIG. 5 is a diagram showing a connection configuration of apparatuses in the remote mobile communication system according to the present embodiment.
- the remote mobile communication system includes a thin client server device 110, an S / P-GW device 305, an e-NodeB (enhanced-NodeB) device 306, a base station 194, and a mobile terminal 670.
- e-NodeB enhanced-NodeB
- the configuration shown in FIG. 5 and the configuration shown in FIG. 1 are such that the mobile terminal 670 passes through the mobile LTE / EPC network 350 and passes through the e-NodeB device 306 and the S / P-GW device 305 to a thin client server. It differs in that it is connected to the device 110. According to the configuration shown in FIG. 5, packets can be transferred at a much higher speed than the configuration based on the mobile packet network 150 shown in FIG. 1.
- the e-NodeB device 306 realizes much faster packet transmission in the wireless section with the mobile terminal 670 using LTE technology. Also, since the S / P-GW apparatus 305 and the thin client server apparatus 110 are connected by the IP protocol, the thin client server apparatus 110 shown in FIG. 1 is also used when connecting to the S / P-GW apparatus. Can be used as is.
- the S / P-GW apparatus 305 receives a TCP / IP or UDP / IP protocol packet from the thin client server apparatus 110 or a file transferred over these protocols, and receives a GTP-U (GPRS Tunneling Protocol-User). Plane) / TCP / IP or GTP-U / UDP / IP protocol, and then outputs the compression-encoded bit stream or file to the e-NodeB device 306.
- GTP-U GPRS Tunneling Protocol-User
- the e-NodeB device 306 converts the data into the PDCP / RLC protocol and sends the packet or file to the mobile terminal 670.
- the contents stored from the mobile terminal are not limited to still images / moving pictures, but various contents such as music / audio, files, and programs can be stored.
- the S / P-GW apparatus 305 uses an integrated configuration of the S-GW apparatus and the P-GW apparatus, but a configuration in which the S-GW apparatus and the P-GW apparatus are separated can also be used.
- a well-known SIP Session Initiation Protocol
- SIP Session Initiation Protocol
- the new service when an operator introduces a new service, the new service can be introduced by updating the application software of the thin client server installed on the network. Therefore, it is not necessary to newly procure and remodel mobile terminals every time a new service is introduced.
- the cache memory (or hard disk or the like such as a hard disk) provided in the thin client server device on the network can be used to store content such as still images, particularly moving images, content files, etc. Storage device). Therefore, even if the content or content file is destroyed due to a failure of the mobile terminal, or when the mobile terminal is misplaced or stolen, the content, content file, etc. are lost and cannot be accessed. .
- the UDP / IP when the stored content is played back or browsed, the UDP / IP can be used during the call connection or during the call connection in response to the fluctuation of the bandwidth of the mobile packet network or the LET / EPC network.
- the number of packet retransmission requests is measured by the thin client server device, and the maximum bit rate when the screen information is compression-encoded can be controlled based on the measurement result. Therefore, it takes time to receive information on the mobile terminal side, and it is possible to avoid a decrease in QoE due to a slow screen update.
- the frequency of the retransmission request received from the portable terminal with respect to the transmitted packet is measured, and at least one of the bit rate and the frame rate of compression encoding by the encoder unit is based on the measurement result
- the rate control unit reduces the maximum bit rate or the maximum frame rate of compression encoding by the encoder unit.
- Appendix 6 A remote mobile communication system comprising the server device according to any one of appendices 1 to 5.
- Appendix 8 The remote mobile communication system according to appendix 6 or 7, wherein the mobile network is a mobile packet network or a mobile LTE / EPC network.
- the server device on the mobile network receives the content accumulation instruction information from the portable terminal via the packet transfer device on the mobile network, and also receives the content stream or content file, and the content stream or content file
- the process of accumulating in the accumulator Receiving content reproduction instruction information from the portable terminal, reading the content stream or content file stored in the storage unit, decoding and reproducing the content stream, and generating a display screen;
- a method for controlling a remote portable communication system comprising a step of sending an encoded result obtained by compressing and encoding all or part of the display screen as a packet to the packet transfer apparatus.
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Abstract
Description
本発明は、日本国特許出願:特願2010-108669号(2010年5月10日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、リモート型携帯通信システム、サーバ装置及びリモート型携帯通信システム制御方法に関し、特に、モバイルネットワークを介してサーバ上の仮想クライアントにアクセスし、あたかも自身の端末であるかのように、仮想クライアントに指示するとともに動作をさせるリモート型携帯通信システム、シンクライアントサーバ装置及びリモート型携帯通信システム制御方法に関する。
モバイルネットワーク上のパケット転送装置を介して携帯端末からコンテンツ蓄積の指示情報を受信するとともにコンテンツストリーム又はコンテンツファイルを受信した場合に、該コンテンツストリーム又はコンテンツファイルを蓄積する蓄積部と、
携帯端末からコンテンツ再生の指示情報を受信すると、蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する仮想クライアント部と、
表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとしてパケット転送装置に送出するエンコーダ部と、を有する。
モバイルネットワーク上のサーバ装置が、モバイルネットワーク上のパケット転送装置を介して携帯端末からコンテンツ蓄積の指示情報を受信するとともにコンテンツストリーム又はコンテンツファイルを受信し、該コンテンツストリーム又はコンテンツファイルを自身の蓄積部に蓄積する工程と、
携帯端末からコンテンツ再生の指示情報を受信し、蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する工程と、
表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとしてパケット転送装置に送出する工程と、を含む。
第1の実施形態に係るリモート型携帯通信システムについて、図面を参照して詳細に説明する。
第2の実施形態に係るリモート型携帯通信システムについて、図面を参照して詳細に説明する。
第3の実施形態に係るリモート型携帯通信システムについて、図面を参照して詳細に説明する。
前記携帯端末からコンテンツ再生の指示情報を受信すると、前記蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する仮想クライアント部と、
前記表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとして前記パケット転送装置に送出するエンコーダ部と、を備えていることを特徴とするサーバ装置。
前記携帯端末からコンテンツ再生の指示情報を受信し、前記蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する工程と、
前記表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとして前記パケット転送装置に送出する工程と、を含むことを特徴とするリモート型携帯通信システム制御方法。
150 モバイルパケットネットワーク
170、570、670 携帯端末
176、576 パケット構築・送信部
180 画面キャプチャ部
186 エンコーダ部
188 パケット受信部
189 キャッシュメモリ(蓄積部)
190 xGSN装置
194 基地局
195 RNC装置
211、511 仮想クライアント部
305 S/P-GW装置
306 e-NodeB装置
350 モバイルLTE/EPCネットワーク
585 レート制御部
595 再送制御部
Claims (12)
- モバイルネットワーク上のパケット転送装置を介して携帯端末からコンテンツ蓄積の指示情報を受信するとともにコンテンツストリーム又はコンテンツファイルを受信した場合に、該コンテンツストリーム又はコンテンツファイルを蓄積する蓄積部と、
前記携帯端末からコンテンツ再生の指示情報を受信すると、前記蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する仮想クライアント部と、
前記表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとして前記パケット転送装置に送出するエンコーダ部と、を備えていることを特徴とするサーバ装置。 - 前記送出したパケットに対して前記携帯端末から受信した再送要求の頻度を計測し、前記エンコーダ部による圧縮エンコードのビットレート及びフレームレートのうちの少なくともいずれかを該計測結果に基づいて制御するレート制御部をさらに備えていることを特徴とする、請求項1に記載のサーバ装置。
- 前記レート制御部は、所定の期間に受信した再送要求の回数が所定の閾値以上である場合には、前記エンコーダ部による圧縮エンコードの最大ビットレート又は最大フレームレートを削減することを特徴とする、請求項2に記載のサーバ装置。
- 前記レート制御部は、前記携帯端末から再送要求を受信した場合には、該当するパケットを再送することを特徴とする、請求項2又は3に記載のサーバ装置。
- 前記エンコーダ部は、前記エンコード結果をパケットとし、UDPプロトコルにより前記パケット転送装置に送出することを特徴とする、請求項2乃至4のいずれか1項に記載のサーバ装置。
- 請求項1乃至5のいずれか一に記載のサーバ装置を備えていることを特徴とするリモート型携帯通信システム。
- 前記サーバ装置から送出されたパケットを前記パケット転送装置を介して受信するとともに、該パケットに格納されたエンコード結果をデコードして表示する携帯端末をさらに備えていることを特徴とする、請求項6に記載のリモート型携帯通信システム。
- 前記モバイルネットワークは、モバイルパケットネットワーク又はモバイルLTE/EPCネットワークであることを特徴とする、請求項6又は7に記載のリモート型携帯通信システム。
- モバイルネットワーク上のサーバ装置が、該モバイルネットワーク上のパケット転送装置を介して携帯端末からコンテンツ蓄積の指示情報を受信するとともにコンテンツストリーム又はコンテンツファイルを受信し、該コンテンツストリーム又はコンテンツファイルを自身の蓄積部に蓄積する工程と、
前記携帯端末からコンテンツ再生の指示情報を受信し、前記蓄積部に蓄積されたコンテンツストリーム又はコンテンツファイルを読み出して復号再生して表示画面を生成する工程と、
前記表示画面の全部又は一部を圧縮エンコードしたエンコード結果をパケットとして前記パケット転送装置に送出する工程と、を含むことを特徴とするリモート型携帯通信システム制御方法。 - 前記送出したパケットに対して前記携帯端末から受信した再送要求の頻度を計測し、圧縮エンコードのビットレート及びフレームレートのうちの少なくともいずれかを該計測結果に基づいて制御する工程をさらに含むことを特徴とする、請求項9に記載のリモート型携帯通信システム制御方法。
- 所定の期間に受信した再送要求の回数が所定の閾値以上である場合には、圧縮エンコードの最大ビットレート又は最大フレームレートを削減する工程を含むことを特徴とする、請求項10に記載のリモート型携帯通信システム制御方法。
- 前記携帯端末から再送要求を受信した場合には、該当するパケットを再送する工程を含むことを特徴とする、請求項10又は11に記載のリモート型携帯通信システム制御方法。
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