WO2011111452A1 - 通信端末、通信システム及び通信方法 - Google Patents
通信端末、通信システム及び通信方法 Download PDFInfo
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- WO2011111452A1 WO2011111452A1 PCT/JP2011/052504 JP2011052504W WO2011111452A1 WO 2011111452 A1 WO2011111452 A1 WO 2011111452A1 JP 2011052504 W JP2011052504 W JP 2011052504W WO 2011111452 A1 WO2011111452 A1 WO 2011111452A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/04—Protocols for data compression, e.g. ROHC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to a technique for performing data communication such as e-mail and Internet access using any one of communication methods in a wireless communication environment in which a plurality of communication methods are mixed.
- a mobile communication device cannot communicate unless the communication methods on the terminal side and the base station side correspond to each other. Therefore, a terminal that does not support the new method cannot perform communication as the new method even in an area where the base station of the new method is introduced, and cannot enjoy the benefits. Conversely, even if you have a terminal that supports only the new method capable of high-speed communication, if the base station area of the new method is in a transitional period of expansion, the area where you can use the terminal is more It can happen that it is limited.
- FIG. 1 is a diagram illustrating an example of a wireless communication environment in which a plurality of communication methods are mixed.
- the LTE system when an LTE / WCDMA multi-mode compatible terminal is used, the LTE system is used in the LTE base station area, and when moving to a WCDMA base station area, the same terminal remains as it is, and the destination WCDMA communication is performed. It can communicate in the system.
- Patent Documents 1 and 2 disclose related technologies applied to such a wireless communication environment in which a plurality of communication methods coexist.
- Patent Document 1 discloses a technique for avoiding a decrease in throughput that is biased to one of the methods even when different independent wireless communication methods are used in a mixed manner.
- Patent Document 2 discloses a technique in which a compression or termination mechanism is not provided in an exchange center (or service node) as a compression method for increasing the transmission bandwidth. Instead, this technique handles protocol data packets by providing a compression or termination mechanism within the radio network controller.
- the base station When using a multi-mode compatible terminal for large-capacity data communication, the base station does not support high-speed large-capacity communication because the bandwidth is not sufficient depending on the communication location and communication method used for communication. Long-term communication is required in the area. For this reason, problems such as deterioration in power consumption performance of the mobile phone terminal and an increase in call disconnection rate due to changes in the propagation environment may occur.
- Patent Document 1 The technology disclosed in Patent Document 1 described above is to control the usage rate of the mixed radio communication technology resources in the entire radio resources so as not to be biased.
- this technology when transmitting a large amount of data that exceeds the limit of the utilization rate allocated in a certain wireless communication resource, the transmission capacity cannot be increased further in the communication method. Accordingly, there remains a problem that it takes a long time to transmit a large amount of data.
- Patent Document 2 is to compress a signal unconditionally in a wireless network controller. Therefore, in this technique, even a low-speed signal that does not need to be compressed is subjected to compression processing, and thus resources (CPU (Central Processing Unit) processing power, power consumption, etc.) are wasted. There is.
- resources CPU (Central Processing Unit) processing power, power consumption, etc.
- the present invention takes a long time when data communication such as e-mail or Internet access is performed using any of the communication methods in a wireless communication environment in which a plurality of communication methods such as GPRS / WCDMA / HSPA / LTE are mixed.
- An object of the present invention is to provide a communication terminal, a communication system, and a communication method capable of suppressing data communication and solving the above-described problems.
- a communication terminal is a communication terminal used in a wireless communication environment in which a plurality of communication methods each having an upper limit value of the amount of data to be communicated are mixed, A compression unit for compressing data to be communicated; A compression control unit that compresses the data by the compression unit when the amount of data to be communicated is equal to or greater than an upper limit value set in accordance with a communication method used for communication.
- the communication system is a communication system including a wireless communication environment in which a plurality of communication methods each having an upper limit value of the amount of data to be communicated are mixed,
- the transmission capacity per unit time is larger than that of the currently communicating base station
- the base station that performs communication is switched to the base station, and the amount of data depends on the communication method that communicates with the base station. If the value is equal to or greater than the set upper limit value, the data is compressed and transmitted.
- a communication method in a communication terminal used in a wireless communication environment in which a plurality of communication methods each having an upper limit value of the amount of data to be communicated is mixed Determining whether to transmit data having a data amount equal to or greater than the upper limit; When transmitting data having a data amount equal to or greater than the upper limit, searching for a base station corresponding to a communication method having a larger transmission capacity per unit time than the currently communicating base station; If the base station is detected, switching the base station for communication to the base station; A step of compressing and transmitting the data when the amount of data is equal to or greater than an upper limit value set in accordance with a communication method for communicating with the base station.
- FIG. 3 is a flowchart for explaining a communication method in the mobile phone terminal shown in FIG.
- 2nd Embodiment of the communication terminal of this invention is a flowchart for explaining a communication method in the mobile phone terminal shown in FIG.
- 3rd Embodiment of the communication terminal of this invention is a figure which shows 3rd Embodiment of the communication terminal of this invention.
- FIG. 2 is a diagram showing a first embodiment of a communication terminal according to the present invention.
- a communication method setting unit 11 for setting which method a mobile phone terminal serving as a communication terminal selects from a plurality of communication methods, and an upper limit value of a data amount for each of the plurality of communication methods Is associated with the data amount upper limit list unit 13, the data compression unit 14 that compresses the data to be transmitted, and whether the data compression unit 14 compresses the data to be transmitted And a data compression control unit 12 that performs the above processing.
- the communication method used for data communication is notified from the communication method setting unit 11 to the data compression control unit 12. Then, the data compression control unit 12 confirms the upper limit value of the amount of data communicated in each communication method set in the data amount upper limit value list unit 13.
- FIG. 3 is a diagram showing an upper limit value of the amount of data communicated in each communication method set in the data amount upper limit value list unit 13 shown in FIG.
- an upper limit value of the amount of data communicated in each communication method is set in the data amount upper limit list section 13 shown in FIG.
- the data to be transmitted is compared with the upper limit amount in the communication method notified from the communication method setting unit 11, and if the data to be transmitted is larger, the data compression unit 14 is instructed to compress data to be transmitted.
- the data compression unit 14 When the data compression unit 14 receives an instruction from the data compression control unit 12 to compress the data to be transmitted, the data compression unit 14 compresses the data to be transmitted and performs the next process for transmission as transmission data. (Not shown).
- FIG. 4 is a flowchart for explaining a communication method in the mobile phone terminal shown in FIG.
- step S1 the mobile phone terminal starts data transmission.
- the communication method used for data communication is notified from the communication method setting unit 11 to the data compression control unit 12.
- step S2 the data compression control unit 12 confirms the communication method used for data communication, and in step S3, of the upper limit value of the amount of data communicated in each communication method shown in FIG. Check the upper limit according to the communication method used.
- step S4 the data compression control unit 12 compares the amount of data to be transmitted with the upper limit value confirmed in step S3. If the data to be transmitted is equal to or greater than the upper limit value, step S5 In step S6, the data compression unit 14 compresses the data to be transmitted. In step S6, the compressed data is transmitted. For example, when the data to be transmitted is an image taken with a digital camera attached to a mobile phone terminal, the amount of data generally increases as the image quality is higher. When the data amount of the image to be transmitted is equal to or more than the above-described upper limit value, the data is compressed and transmitted with the data amount reduced. The compressed and transmitted data is decompressed by the opposite receiving party, and the data communication is completed.
- the mobile phone terminal transmits the data to be transmitted as it is without being compressed.
- the data to be transmitted is a text-based short text e-mail or the like, by transmitting without performing the compression process, resources (CPU load, power consumption, etc.) for the corresponding compression process are transmitted. Can be saved.
- the data compression method may be a reversible compression method or an irreversible compression method, and can be arbitrarily determined according to the properties of the data to be handled.
- irreversible compression the decompression process may be performed by the other party receiving the data.
- the amount of data may be reduced by performing irreversible image compression within the above-described upper limit range of data. May not need to be decompressed by the other party.
- the compression / decompression processing may be performed end-to-end, that is, compressed at the transmitting terminal, and decompressed by the other party that finally receives the data. Further, the compression may be performed only in the wireless section, and the file compressed by the mobile phone terminal may be decompressed by the base station and transferred to the final receiver.
- the mobile phone terminal can use e-mail, Internet access, etc. using any communication method in a wireless communication environment in which a plurality of communication methods such as GPRS / WCDMA / HSPA / LTE are mixed.
- This can be used for data communication.
- FIG. 5 is a diagram showing a second embodiment of the communication terminal of the present invention.
- a communication method setting unit 21 for setting which method a mobile phone terminal serving as a communication terminal selects from a plurality of communication methods, and an upper limit value of the data amount for each of the plurality of communication methods Is associated with the data amount upper limit list unit 23, the data compression unit 24 that compresses the data to be transmitted, and whether the data compression unit 24 compresses the data to be transmitted Data compression control unit 22 and base station switching control unit 25.
- the communication method used for data communication is notified from the communication method setting unit 21 to the data compression control unit 22. Then, the data compression control unit 22 confirms the upper limit value of the amount of data communicated in each communication method set in the data amount upper limit value list unit 23.
- the data to be transmitted is compared with the upper limit amount in the communication method notified from the communication method setting unit 21, and if the data to be transmitted is larger, the communication method setting is performed.
- the unit 21 is instructed to switch base stations.
- the communication method setting unit 21 searches the base station switching control unit 25 for a base station that can handle a communication method (for example, LTE) having the maximum communication capacity among a plurality of communication methods that can communicate with the base station switching control unit 25. Instruct to try switching.
- a communication method for example, LTE
- the base station switching control unit 25 detects an appropriate base station, and when the base station switching is successful, notifies the communication method setting unit 21 that the switching is successful.
- data compression is determined according to the newly set communication method, data compression is performed, and the data is sent to the next process (not shown) for transmission as transmission data.
- FIG. 6 is a flowchart for explaining a communication method in the mobile phone terminal shown in FIG.
- step S11 the mobile phone terminal starts data transmission.
- the communication method used for data communication is notified from the communication method setting unit 21 to the data compression control unit 22.
- step S12 the data compression control unit 22 confirms the communication method used for data communication.
- step S13 the data compression control unit 22 determines the data to be communicated in each communication method set in the data amount upper limit value list unit 23. Check the upper limit value according to the communication method to be used among the upper limit values.
- step S14 the data compression control unit 22 compares the amount of data to be transmitted with the upper limit value confirmed in step S13. As a result, if the data to be transmitted is greater than or equal to the upper limit value, it is determined in step S15 whether the currently used communication method is LTE.
- the data to be communicated is compressed by the data compression unit 24 in step S16, and the compressed data is transmitted in step S17.
- the mobile phone terminal transmits the data to be transmitted as it is without being compressed.
- step S18 the base station switching control unit 25 has a transmission capacity per unit time larger than that of the currently registered base station. Perform a station search.
- step S20 the base station switching control unit 25 re-registers the location with the detected base station having a larger transmission capacity per unit time, and performs communication. Switch the base station to perform.
- step S21 the data compression control unit 22 confirms the upper limit value in the communication method of the base station that has been re-registered, and in step S22, the data compression control unit 22 determines the amount of data to be transmitted. And the upper limit value confirmed in step S21.
- the process proceeds to step S16, and similarly to the above, the data to be transmitted is compressed by the data compression unit 24, and the compressed data is transmitted.
- the mobile phone terminal transmits the data to be transmitted as it is without being compressed.
- step S19 If a base station having a transmission capacity per unit time larger than that of the base station currently registered in step S19 cannot be detected, the process proceeds to step S16 without changing the base station. Similarly, the data compression unit 24 compresses the data to be transmitted, and transmits the compressed data.
- the mobile phone terminal can use e-mail, Internet access, etc. using any communication method in a wireless communication environment in which a plurality of communication methods such as GPRS / WCDMA / HSPA / LTE are mixed. This can be used for data communication.
- Set the upper limit of the amount of data to be communicated according to the transmission capacity per unit time of each communication method, and send data after compressing the data to be communicated when performing data communication exceeding the upper limit By performing the above, it is possible to perform communication with an optimum data amount for each communication method. As a result, data communication over a long period of time can be suppressed, and problems such as deterioration of power consumption performance of the mobile phone terminal and an increase in call disconnection rate due to changes in the propagation environment can be solved.
- FIG. 7 is a diagram showing a third embodiment of a communication terminal according to the present invention.
- a communication method setting unit 31 for setting which method a mobile phone terminal serving as a communication terminal selects from a plurality of communication methods, and an upper limit value of the data amount for each of the plurality of communication methods Is associated with a data amount upper limit list unit 32 and a data compression unit 33 that performs compression processing of transmission target data.
- a plurality of communication methods in which the upper limit value of the data amount for each of the plurality of communication methods is associated in the communication method setting unit 31 and the data amount upper limit value list unit 32.
- the upper limit value of the amount of data to be communicated is set according to the transmission capacity per unit time.
- the data transmitted by the data compression unit 33 is compressed and transmitted. This makes it possible to communicate with the optimal amount of data for each communication method, suppresses data communication over a long period of time, degrades the power consumption performance of mobile phone terminals, and increases the call disconnection rate due to fluctuations in the propagation environment. The effect which can solve a problem is acquired.
- the system is mainly assumed to be applicable to a mobile phone terminal.
- the wireless communication terminal can be used in an environment where a plurality of communication systems are mixed, other It is also applicable to other terminals.
- the wireless communication terminal that performs wireless communication in the wireless network is assumed to be a dedicated communication device.
- a personal computer device that performs various types of data processing is wirelessly connected in this embodiment.
- the communication control processing is executed on the computer device side, and the software for executing the communication control processing is installed in the personal computer device.
- the personal computer device may be configured to execute a temporary suspension process of transmission of a beacon or the like.
- the program installed in the data processing device such as the personal computer device may be distributed via various recording (storage) media such as an optical disk and a memory card, or distributed via communication means such as the Internet. Also good.
- Appendix 2 In the communication terminal described in Appendix 1, When the amount of data to be communicated is equal to or greater than the upper limit set according to the communication method used for communication, the base corresponding to the communication method having a larger transmission capacity per unit time than the base station currently communicating Search for a station, and when the base station is detected, a base station switching control unit that switches a base station for communication to the base station;
- the said compression control part is a communication terminal which compresses the said data in the said compression part, when the data amount communicated is more than the upper limit set according to the communication system which communicates with the said base station.
- a communication terminal in which the plurality of communication methods include an LTE method.
- the communication terminal is a irreversible compression method for compressing the data by the compression unit.
- a communication system including a wireless communication environment in which a plurality of communication methods in which an upper limit value of data amount to be communicated is set, When the amount of data to be communicated by the terminal that performs communication is greater than or equal to the upper limit value set according to the communication method used for communication, the transmission capacity per unit time is larger than that of the currently communicating base station When a base station corresponding to a communication method is searched and the base station is detected, the base station that performs communication is switched to the base station, and the amount of data depends on the communication method that communicates with the base station.
- a communication system that compresses and transmits the data when the value is equal to or greater than the set upper limit value.
- the communication system in which the plurality of communication methods include an LTE method.
- the communication system is a lossy compression method for compressing the data.
- a communication method in which the plurality of communication methods include an LTE method.
- the communication method is a lossy compression method for compressing the data.
- a procedure for determining whether or not to transmit data having a data amount equal to or greater than the upper limit For communication terminals used in a wireless communication environment in which multiple communication methods with the upper limit of the amount of data to be communicated are mixed, A procedure for determining whether or not to transmit data having a data amount equal to or greater than the upper limit; When transmitting data having a data amount equal to or greater than the upper limit, a procedure for searching for a base station corresponding to a communication method having a larger transmission capacity per unit time than a base station currently communicating, When the base station is detected, a procedure for switching the base station for communication to the base station; A program for executing a procedure of compressing and transmitting the data when the amount of data is equal to or greater than an upper limit value set according to a communication method for communicating with the base station.
Abstract
Description
通信されるデータを圧縮する圧縮部と、
通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、前記データを前記圧縮部にて圧縮する圧縮制御部とを有する。
通信を行う端末が、通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチし、該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替え、前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信する。
前記上限値以上のデータ量のデータを送信するか否かを判断するステップと、
前記上限値以上のデータ量のデータを送信する場合は、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチするステップと、
該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替えるステップと、
前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信するステップとを有する。
図2は、本発明の通信端末の第1の実施の形態を示す図である。
関連する携帯電話端末では、3GPP(3rd Generation Partnership Project) TS25.304に規定されているCell selection(セル選択)やCell reselection(セル再選択)動作に従って、より通信状態の良好な基地局と通信できるよう通信する基地局を選択していた。そのため、複数の通信方式が混在する無線通信環境下において、単位時間当たりの伝送容量が一番大きな基地局と通信するとは限らなかった。そこで、第2の実施の形態では、上限値以上のデータ量のデータ通信を開始する際に、携帯電話端末側で基地局をサーチする。その結果、現在位置登録している基地局よりも単位時間当たりの伝送容量が大きな基地局が検出された場合には、その基地局に位置登録をし直し、その基地局を介してデータ通信を行っている。従って、データ量によっては、通信されるデータ量を圧縮する処理を省略しつつ、短時間でデータ通信を完了させ、第1の実施の形態と同様な効果が得られるよう工夫している。
図7は、本発明の通信端末の第3の実施の形態を示す図である。
通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境下にて使用される通信端末であって、
通信されるデータを圧縮する圧縮部と、
通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、前記データを前記圧縮部にて圧縮する圧縮制御部とを有する通信端末。
付記1に記載の通信端末において、
通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチし、該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替える基地局切替制御部を有し、
前記圧縮制御部は、通信されるデータ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを前記圧縮部にて圧縮する通信端末。
付記2に記載の通信端末において、
前記複数の通信方式にはLTE方式が含まれる通信端末。
付記2または付記3に記載の通信端末において、
前記圧縮部による前記データの圧縮は、非可逆圧縮方式である通信端末。
通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境を具備する通信システムであって、
通信を行う端末が、通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチし、該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替え、前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信する通信システム。
付記5に記載の通信システムにおいて、
前記複数の通信方式にはLTE方式が含まれる通信システム。
付記5または付記6に記載の通信システムにおいて、
前記データの圧縮は、非可逆圧縮方式である通信システム。
通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境下にて使用される通信端末における通信方法であって、
前記上限値以上のデータ量のデータを送信するか否かを判断するステップと、
前記上限値以上のデータ量のデータを送信する場合は、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチするステップと、
該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替えるステップと、
前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信するステップとを有する通信方法。
付記8に記載の通信方法において、
前記複数の通信方式にはLTE方式が含まれる通信方法。
付記8または付記9に記載の通信方法において、
前記データの圧縮は、非可逆圧縮方式である通信方法。
通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境下にて使用される通信端末に、
前記上限値以上のデータ量のデータを送信するか否かを判断する手順と、
前記上限値以上のデータ量のデータを送信する場合は、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチする手順と、
該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替える手順と、
前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信する手順とを実行させるためのプログラム。
Claims (10)
- 通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境下にて使用される通信端末であって、
通信されるデータを圧縮する圧縮部と、
通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、前記データを前記圧縮部にて圧縮する圧縮制御部とを有する通信端末。 - 請求項1に記載の通信端末において、
通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチし、該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替える基地局切替制御部を有し、
前記圧縮制御部は、通信されるデータ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを前記圧縮部にて圧縮する通信端末。 - 請求項2に記載の通信端末において、
前記複数の通信方式にはLTE方式が含まれる通信端末。 - 請求項2または請求項3に記載の通信端末において、
前記圧縮部による前記データの圧縮は、非可逆圧縮方式である通信端末。 - 通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境を具備する通信システムであって、
通信を行う端末が、通信されるデータ量が、通信に用いられる通信方式に応じて設定された上限値以上である場合に、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチし、該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替え、前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信する通信システム。 - 請求項5に記載の通信システムにおいて、
前記複数の通信方式にはLTE方式が含まれる通信システム。 - 請求項5または請求項6に記載の通信システムにおいて、
前記データの圧縮は、非可逆圧縮方式である通信システム。 - 通信されるデータ量の上限値がそれぞれ設定された複数の通信方式が混在する無線通信環境下にて使用される通信端末における通信方法であって、
前記上限値以上のデータ量のデータを送信するか否かを判断するステップと、
前記上限値以上のデータ量のデータを送信する場合は、現在通信している基地局よりも単位時間当たりの伝送容量が大きな通信方式に対応する基地局をサーチするステップと、
該基地局が検出された場合には、通信を行う基地局を当該基地局に切り替えるステップと、
前記データ量が、当該基地局と通信を行う通信方式に応じて設定された上限値以上である場合に、前記データを圧縮して送信するステップとを有する通信方法。 - 請求項8に記載の通信方法において、
前記複数の通信方式にはLTE方式が含まれる通信方法。 - 請求項8または請求項9に記載の通信方法において、
前記データの圧縮は、非可逆圧縮方式である通信方法。
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US9313728B2 (en) | 2016-04-12 |
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US20120320744A1 (en) | 2012-12-20 |
EP2547146A1 (en) | 2013-01-16 |
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