WO2016088242A1

WO2016088242A1 - Communication terminal device, attachment device, and program

Info

Publication number: WO2016088242A1
Application number: PCT/JP2014/082218
Authority: WO
Inventors: 浩桂川
Original assignee: シャープ株式会社
Priority date: 2014-12-05
Filing date: 2014-12-05
Publication date: 2016-06-09

Abstract

A communication terminal device for executing a plurality of wireless communication services using a common wireless access scheme, wherein interference between a plurality of RF chains is reduced and services are provided at a relatively low price. The present invention has an antenna unit 102, a plurality of first RF chain units 105, 107, a baseband unit 101 for generating a baseband signal, a power source unit 103 for supplying electric power, a second RF chain unit 201 for transmitting/receiving a wireless signal at relatively high electric power in order to execute a second wireless communication service, and a high-output power source unit 204 for providing relatively high electric power to the second RF chain unit 201, the present invention being provided with an interface unit 109 for electrically connecting to or separating from an attachment device 200 that is configured from a housing separate from the device itself, and the second RF chain unit 201 transmitting/receiving the wireless signal of the second wireless communication service by using the electric power supplied from the high-output power source unit 204 when the attachment device 200 is connected.

Description

Communication terminal device, attachment device, and program

The present invention relates to a technique for executing a plurality of wireless communication services using a common wireless access method.

Recently, in the 3rd Generation Partnership Project (hereinafter referred to as “3GPP”) of the international standardization organization, standardization work for Long Term Evolution (hereinafter referred to as “LTE”) is being promoted. As one of them, diversion of the LTE network to the next-generation public safety land mobile radio (hereinafter referred to as “public safety”) is being studied.

Public safety is mainly discussed in Europe and the United States, but when applied to the equivalent system in Japan, public wireless communication for emergency use that integrates police radio, fire fighting radio, disaster prevention radio, etc. System. Previously, North American Association of Public-Safety Communications Officials-International (APCO) Project 25 (P25, APCO-25), European European Telecommunications Standard (TradeRand), etc. Has been used.

FIG. 2 is a block diagram showing an example of a schematic configuration of a conventional communication terminal apparatus 300. As shown in FIG. The communication terminal apparatus 300 includes at least a baseband unit 301, an antenna unit 302, a power supply unit 303, a clock unit 304, a first RF chain unit 305, and a second RF chain unit 306. The “unit” in the figure is an element that realizes the function and each procedure of the communication terminal apparatus, which is also expressed by terms such as section, circuit, component device, device, and unit. For simplicity, FIG. 2 shows two RF chain portions, but three or more configurations may be used.

The transmission baseband signal generated by the baseband unit 301 is converted into an RF signal having a predetermined frequency and output by each of the first RF chain unit 305 and the second RF chain unit 306, and is transmitted from the antenna unit 302 to the air. To be emitted. Similarly, the RF signal received by the antenna unit 302 is converted into a received baseband signal by each of the first RF chain unit 305 and the second RF chain unit 306 and demodulated by the baseband unit 301.

The power supply unit 303 supplies necessary power to each of the first RF chain unit 305 and the second RF chain unit 306, and the clock unit 304 includes the first RF chain unit 305 and the second RF chain unit 306. The necessary source frequency is supplied to each of the above. That is, the antenna unit 302, the power supply unit 303, and the clock unit 304 are common to the first RF chain unit 305 and the second RF chain unit 306.

Such a conventional communication terminal apparatus 300 performs only access to the LTE system, and a plurality of RF chains are prepared for simultaneously processing signals in a plurality of frequency bands at the time of carrier aggregation, for example. Note that the conventional communication terminal apparatus 300 has a plurality of antennas for the purpose of Multi Input Multi Output (hereinafter referred to as “MIMO”). However, if attention is paid to each antenna, a plurality of RFs are used during carrier aggregation. Since sharing in the chain is the same, only one of the antennas is described in FIG. 2, and the second and subsequent antennas are omitted.

As shown in Non-Patent Document 1, in order to realize public safety in LTE, as a hardware configuration of the communication terminal device, a plurality of RF functions (hereinafter, “ It is possible to use almost the conventional functions, including the provision of an “RF chain”.

However, there is a significant difference. The communication terminal device that supports only the conventional LTE has a maximum transmission power of 200 mW (23 dBm), whereas the communication terminal device that supports both LTE and public safety. It is necessary to provide RF chains with different transmission powers of 200 mW for communication with LTE and 2 W (33 dBm) for communication with public safety.

If both the 200 mW class RF chain and the 2 W class RF chain are provided in the same housing of the communication terminal apparatus, the signal quality of the low output RF chain is significantly deteriorated due to the interference of the signal from the high output RF chain. Is concerned.

However, in Non-Patent Document 1, it is described that both a high-power RF chain and a low-power RF chain are provided as independent circuits, but in order to prevent interference between these two RF chains. No specific strategy is shown.

In addition, terminals supporting only LTE could be provided at a relatively low price depending on the market size, but conventional public safety terminals were very expensive.

The present invention has been made in view of such circumstances, and in a communication terminal apparatus that executes a plurality of wireless communication services using a common wireless access method, while mitigating interference between a plurality of RF chains. An object of the present invention is to provide a communication terminal device, an attachment device, and a program that can provide services at a relatively low cost.

(1) In order to achieve the above object, the present invention has taken the following measures. That is, the communication terminal device of the present invention is a communication terminal device that executes a plurality of wireless communication services using a common wireless access method, and the first wireless communication service and the second wireless communication device via the antenna. A plurality of first RF units that transmit and receive a radio signal of a communication service; a baseband unit that generates a baseband signal used in each of the first radio communication service and the second radio communication service; Relative to a power supply unit that supplies power to one RF unit, a second RF unit that transmits and receives a radio signal with relatively high power to execute the second wireless communication service, and the second RF unit An interface unit that has a high-output power supply unit that provides high power and is electrically connected to or separated from an attachment device that is configured with a housing different from the device itself, The face unit detects connection or separation of the attachment device, and when the attachment device is connected, the second RF unit uses the power supplied from the high-output power supply unit to Transmitting and receiving wireless signals for wireless communication services.

As described above, the plurality of first RF units that transmit and receive the wireless signals of the first wireless communication service and the second wireless communication service via the antenna, the first wireless communication service, and the second wireless communication service Since a baseband unit that generates a baseband signal used in each case and a power supply unit that supplies power to each first RF unit are provided, wireless signals of two types of wireless communication services can be transmitted and received. For example, LTE and public safety can be used simultaneously with a single communication terminal device. When the attachment device is connected, the second RF unit transmits and receives the wireless signal of the second wireless communication service using the power supplied from the high-output power supply unit. Therefore, the second wireless communication service Then, it is possible to perform wireless communication over a longer distance than the first wireless communication service. For example, by using the second wireless communication service as public safety, wireless communication between terminals can be performed at a location several tens of kilometers away.

(2) Further, in the communication terminal device according to the present invention, when the attachment device is not connected, each of the first RF units uses the power supplied from the power supply unit to perform the first wireless communication. At least one of the service and the second wireless communication service is executed.

As described above, when the attachment device is not connected, each first RF unit executes at least one of the first wireless communication service and the second wireless communication service using the power supplied from the power supply unit. Therefore, it is possible to transmit / receive at least one of the two types of wireless communication services. For example, LTE and public safety can be used simultaneously with a single communication terminal device.

(3) Further, the communication terminal device of the present invention is characterized by including a housing independent of the attachment device.

Thus, since the housing independent of the attachment device is provided, it is possible to avoid interference between the first wireless communication service and the second wireless communication service executed at high output as much as possible. Moreover, the high output which provides a relatively high electric power to the 2nd RF part and 2nd RF part which transmit / receive a radio signal with a relatively high electric power to an attachment apparatus in order to perform a 2nd wireless communication service Since the power supply unit is provided, it is possible to suppress an increase in the cost of the own device and the cost of the attachment device.

(4) Further, in the communication terminal device of the present invention, the first wireless communication service corresponds to cellular communication using LTE (Long Termination Evolution), and the second wireless communication service corresponds to public safety. It is characterized by doing.

Thus, since the first wireless communication service corresponds to LTE (Long Term Evolution) and the second wireless communication service corresponds to public safety, LTE and public safety can be achieved with a single communication terminal device. It can be used simultaneously. Further, when the attachment device is connected, the second RF unit transmits a radio signal with public safety using the power supplied from the high-output power supply unit, and therefore performs radio communication at a longer distance than LTE. It becomes possible.

(5) Further, the attachment device of the present invention includes a plurality of first RF units that transmit and receive radio signals of the first radio service and the second radio service via an antenna, the first radio service, and the A communication terminal apparatus having a baseband unit that generates a baseband signal used in each of the second wireless services, a power supply unit that supplies power to each of the first RF units, and an interface unit that performs electrical connection or separation On the other hand, it is an attachment device that is electrically connected or separated via the interface unit, and is wireless with relatively high power to execute the second wireless communication service via a high-power antenna. A second RF unit that transmits and receives signals; and a high-output power supply unit that provides relatively high power to the second RF unit; When connected, the second RF unit is characterized by transmitting and receiving radio signals of the second radio communication services using power supplied from the high output power supply unit.

Thus, when connected to the communication terminal device, the second RF unit transmits and receives the radio signal of the second wireless communication service using the power supplied from the high-output power supply unit. It is possible to perform wireless communication over a longer distance than the first wireless communication service executed in (1). For example, by using the second wireless communication service as public safety, wireless communication between terminals can be performed at a location several tens of kilometers away.

(6) Further, the attachment device of the present invention is characterized by including a housing independent of the communication terminal device.

As described above, since the housing independent of the communication terminal device is provided, it is possible to avoid interference between the first wireless communication service of the communication terminal device and the second wireless communication service executed at high output as much as possible. It becomes. In addition, since the second RF unit and the high-output power supply unit are provided, it is possible to suppress an increase in the cost of the communication terminal device and the cost of the own device.

(7) The program of the present invention includes a plurality of first RF units that transmit and receive wireless signals of the first wireless communication service and the second wireless communication service via an antenna, and the first wireless communication service. And a baseband unit that generates a baseband signal used in each of the second wireless communication services, a power supply unit that supplies power to each of the first RF units, and a relative unit for executing the second wireless communication service A second RF unit that transmits / receives a radio signal with a relatively high power and a high-output power supply unit that provides relatively high power to the second RF unit, and is configured in a separate housing from the device itself. A communication terminal device program that at least includes an interface unit that is electrically connected to or disconnected from the attachment device and executes a plurality of wireless communication services using a common wireless access method In the interface unit, when the attachment device is connected to the process for detecting connection or separation of the attachment device, the second RF unit uses the power supplied from the high-output power source unit. And causing the computer to execute a series of processes including a process of transmitting and receiving a radio signal of the second wireless communication service.

In this way, the communication terminal device transmits and receives the radio signals of the first radio communication service and the second radio communication service via the antenna, the plurality of first RF units, the first radio communication service, and the second radio communication service. Since a baseband unit that generates a baseband signal used in each of the wireless communication services and a power supply unit that supplies power to each first RF unit are provided, wireless signals of two types of wireless communication services can be transmitted and received. It becomes possible. For example, LTE and public safety can be used simultaneously with a single communication terminal device. Further, when the attachment device is connected to the interface unit of the communication terminal device, the second RF unit transmits and receives the radio signal of the second radio communication service using the power supplied from the high output power source unit. In the second wireless communication service, it is possible to perform wireless communication over a longer distance than in the first wireless communication service. For example, by using the second wireless communication service as public safety, wireless communication between terminals can be performed at a location several tens of kilometers away.

(8) According to the program of the present invention, when the attachment device is not connected, each first RF unit uses the power supplied from the power supply unit, and the first wireless communication service or The method further includes a process of executing at least one of the second wireless communication services.

According to the present invention, it is possible to transmit and receive wireless signals of two types of wireless communication services, and it is possible to perform wireless communication over a longer distance than the first wireless communication service by the second wireless communication service. It becomes.

It is a figure which shows schematic structure of the communication terminal device and attachment apparatus which concern on embodiment of this invention. It is a block diagram which shows an example of schematic structure of the conventional communication terminal device.

When the present inventors intend to realize a communication terminal apparatus compatible with both LTE and public safety, an RF of low output (for example, 200 mW) is provided in the communication terminal apparatus housing for communication with LTE. If a high-power (for example, 2W) RF chain is provided for communication with public safety, the signal quality of the low-power RF chain is significantly reduced due to signal interference from the high-power RF chain. Focusing on the fear of deterioration, an RF attachment with a high output is provided in an attachment device separate from the LTE communication terminal device, and this can be attached to and detached from the communication terminal device. It has been found that interference between chains can be prevented, and has led to the present invention.

That is, the communication terminal device of the present invention is a communication terminal device that executes a plurality of wireless communication services using a common wireless access method, and the first wireless communication service and the second wireless communication device via the antenna. A plurality of first RF units that transmit and receive a radio signal of a communication service; a baseband unit that generates a baseband signal used in each of the first radio communication service and the second radio communication service; Relative to a power supply unit that supplies power to one RF unit, a second RF unit that transmits and receives a radio signal with relatively high power to execute the second wireless communication service, and the second RF unit And an interface unit electrically connected to or separated from an attachment device configured with a housing different from the device. The interface unit detects connection or separation of the attachment device, and when the attachment device is connected, the second RF unit uses the power supplied from the high-output power supply unit to Transmitting and receiving wireless signals for wireless communication services.

As a result, the present inventors can transmit and receive wireless signals using two types of wireless communication services, and further perform wireless communication over a longer distance than the first wireless communication service using the second wireless communication service. Made it possible. Embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a diagram showing a schematic configuration of a communication terminal device and an attachment device according to the first embodiment. The communication terminal apparatus 100 includes a baseband unit 101, an antenna unit 102, a power supply unit 103, a first clock unit 104, and first

RF chain units

105 and 107. The first

RF chain units

105 and 107 transmit and receive radio signals of the first radio communication service (for example, LTE) or the second radio communication service (for example, public safety) via the antenna unit 102. Further, the interface unit 109 electrically connects an attachment device 200 to be described later, and detects connection or separation of the attachment device 200. Furthermore, the communication terminal device 100 has a housing independent of the attachment device 200.

It should be noted that the “part” in the figure is an element that realizes the functions and procedures of the communication terminal apparatus 100 that are also expressed by terms such as section, circuit, component device, device, and unit. For simplicity, two RF chain portions are shown in FIG. 1, but three or more configurations may be used. Moreover, although the power supply part 103 is single, it is good also as multiple, and the power supply part 103 provides the power supply of 200 mW as a low output power supply, for example.

The transmission baseband signal generated by the baseband unit 101 is converted into an RF signal having a predetermined frequency and output by the first

RF chain units

105 and 107 and radiated from the antenna unit 102 into the air. Similarly, the RF signal received by the antenna unit 102 is converted into a reception baseband signal by the first

RF chain units

105 and 107 and demodulated by the baseband unit 101.

The power supply unit 103 supplies necessary power in the first

RF chain units

105 and 107, and the first clock unit 104 supplies necessary source frequency in the first

RF chain units

105 and 107. That is, the first

RF chain units

105 and 107 are individually connected to the antenna unit 102, the power supply unit 103, the first clock unit 104, and the power supply unit 103, respectively. Has no electrical connection.

The attachment device 200 is a device for performing wireless communication with high output such as 2 W, for example. The attachment device 200 includes a second RF chain unit 201, a second clock unit 202, a high output antenna unit 203, and a high output power supply unit 204 that provides high output such as 2W. Further, the attachment device 200 has a housing independent of the communication terminal device 100.

The interface unit 109 of the communication terminal device 100 detects whether the attachment device 200 is connected. When the attachment device 200 is connected, the second RF chain unit 201 is supplied from the high-output power supply unit 204. The wireless signal of the second wireless communication service is transmitted from the high-power antenna unit 203 using the power to be transmitted. That is, the transmission baseband signal generated by the baseband unit 101 is converted into an RF signal having a predetermined frequency and output by the second RF chain unit 201 via the interface unit 109, and is transmitted from the high-power antenna unit 203 to the air. To be emitted. Further, the RF signal received by the high-power antenna unit 203 is converted into a received baseband signal by the second RF chain unit 201 and demodulated by the baseband unit 101.

The signal output from the baseband unit 101 and input to the attachment device 200 via the interface unit 109 is a so-called modem signal. For this reason, the attachment device 200 is a device that is fundamentally different from the RF booster. The attachment device 200 may be any device that can be electrically connected to the communication terminal device 100. For example, the attachment device 200 may be a handy type or an in-vehicle type.

The communication terminal device 100 according to the embodiment of the present invention accesses both the LTE system and the public safety system. For example, the first

RF chain portions

105, 107 may be designed to constitute a circuit for communication with LTE and public safety systems. When the attachment device 200 is not connected, the communication terminal device 100 performs wireless communication by LTE or public safety with the first

RF chain units

105 and 107 with power of 200 mW, for example.

On the other hand, when the attachment device 200 is connected, wireless communication by public safety is performed by the attachment device 200 that can use, for example, 2 W of high output power. Thereby, the LTE wireless communication by the communication terminal device 100 and the public safety wireless communication by the attachment device 200 can be performed simultaneously without causing interference. In addition, since the communication terminal device is not equipped with a high-output power supply, the communication terminal device can be provided at almost the same cost as the conventional one, and the attachment device can also avoid a complicated structure. It is possible to suppress.

It should be noted that the power supply unit 103 and the high-output power supply unit 204 can take various configurations. For example, the power supply unit 103 may be a plurality of separated power supply ground outputs from a single power supply circuit, a plurality of individual batteries, or a combination of an internal battery and an external power supply. The same applies to the high-output power supply unit 204.

As described above, according to the present embodiment, in the communication terminal device that can communicate with both LTE and public safety, the functions that are common to both LTE and public safety and the functions that are necessary only for public safety are different. It is possible to reduce the cost by realizing the former as a general LTE terminal. Further, by using the latter power source as an attachment device and separating it as a separate power source such as an in-vehicle power source, it is possible to realize both high output and low battery consumption.

In order to mitigate the interference caused by the first

RF chain units

105 and 107 and the second RF chain unit 201, it is necessary to arrange the communication terminal device and the attachment device as far as possible from each other. desirable. For this reason, the communication terminal device and the attachment device are arranged separately, and the two housings are connected by an external cable.

Further, the power supplied to the communication terminal device 100 and the attachment device 200 may be common via an external cable, or each may be supplied with independent power. The second RF chain unit 201 of the attachment device 200 is designed for high-power transmission and has relatively high power consumption. Further, as shown in Non-Patent Document 1, if high-power transmission is required only in an in-vehicle device form and low-power transmission is used for portable use, power supply to the communication terminal device 100 is internally performed. A battery may be used, and the power supply to the attachment device 200 may be separated from the power supply system of the automobile. This is likely to be effective to satisfy both the battery life in the separated form and the high output in the connected form.

The interface of the external cable may be a dedicated interface for connecting the communication terminal device 100 and the attachment device 200, or may be realized by an existing interface such as USB (Universal Serial Bus). Also good. If an existing interface such as USB is used, there is a possibility that the unit price of the apparatus can be made lower than that provided with a new connection terminal.

The interface unit 109 of the communication terminal device 100 detects whether the communication terminal device 100 and the attachment device 200 are connected or separated, and changes the public safety function and control of the transmission power based on the detection result. . Detection of attachment / detachment of the attachment device 200 by the interface unit 109 may be based on a signal via an external cable, or may be realized by a mechanism inside the communication terminal device 100.

Assuming that the communication terminal device 100 is used alone for portable use, and the attachment device 200 is used by being connected to the communication terminal device 100 for use in, for example, in-vehicle high output transmission, the communication terminal device 100 Although the size is constrained, the size of the attachment device 200 may be relatively unconstrained. In that case, in order to improve the gain, the high-power antenna unit 203 of the attachment device 200 may be realized as a large antenna that can be disposed outside the vehicle, for example.

As described above, according to the present embodiment, it is possible to transmit and receive wireless signals of two types of wireless communication services, and the second wireless communication service allows a longer distance than the first wireless communication service. Wireless communication can be performed.

DESCRIPTION OF SYMBOLS 100 Communication terminal device 101 Baseband part 102 Antenna part 103 Power supply part 104 1st clock part 105 1st RF chain part 107 1st RF chain part 109 Interface part 200 Attachment apparatus 201 2nd RF chain part 202 2nd Clock unit 203 high output antenna unit 204 high output power supply unit

Claims

A communication terminal device that executes a plurality of wireless communication services using a common wireless access method,
A plurality of first RF units that transmit and receive wireless signals of the first wireless communication service and the second wireless communication service via an antenna;
A baseband unit that generates a baseband signal used in each of the first wireless communication service and the second wireless communication service;
A power supply unit for supplying power to each of the first RF units;
In order to execute the second wireless communication service, a second RF unit that transmits and receives a radio signal with relatively high power and a high-output power supply unit that supplies relatively high power to the second RF unit are provided. And an interface unit that is electrically connected to or separated from an attachment device configured by a housing different from the device itself,
The interface unit detects connection or disconnection of the attachment device;
When the attachment device is connected, the second RF unit transmits and receives a radio signal of the second radio communication service using power supplied from the high-output power source unit. Terminal device.
When the attachment device is not connected, each of the first RF units uses at least one of the first wireless communication service and the second wireless communication service using power supplied from the power supply unit. The communication terminal device according to claim 1, wherein the communication terminal device is executed.
3. The communication terminal device according to claim 1, further comprising a housing independent of the attachment device.
The first wireless communication service corresponds to cellular communication using LTE (Long Termination Evolution), and the second wireless communication service corresponds to public safety. The communication terminal device according to any one of the above.
A plurality of first RF units that transmit and receive radio signals of the first radio service and the second radio service via an antenna, and baseband signals used in each of the first radio service and the second radio service Is electrically connected to a communication terminal device having a baseband unit that generates power, a power supply unit that supplies power to each of the first RF units, and an interface unit that performs electrical connection or separation via the interface unit Attachment device to be separated or separated,
A second RF unit that transmits and receives radio signals with relatively high power to perform the second radio communication service via a high-power antenna;
A high-output power supply unit that provides relatively high power to the second RF unit,
When connected to the communication terminal device, the second RF unit transmits and receives a radio signal of the second radio communication service using power supplied from the high-output power source unit. Attachment device.
The attachment device according to claim 5, further comprising a housing independent of the communication terminal device.
A plurality of first RF units that transmit and receive wireless signals of the first wireless communication service and the second wireless communication service via the antenna, each of the first wireless communication service and the second wireless communication service A baseband unit that generates a baseband signal to be used, a power supply unit that supplies power to each of the first RF units, and a first unit that transmits and receives a radio signal with relatively high power to execute the second radio communication service. A high-output power supply unit that provides relatively high power to the second RF unit and the second RF unit, and is electrically connected to or separated from an attachment device configured by a housing different from the device itself A program of a communication terminal device that includes at least an interface unit and executes a plurality of wireless communication services using a common wireless access method,
In the interface unit, processing for detecting connection or separation of the attachment device;
When the attachment device is connected, the second RF unit transmits and receives a radio signal of the second radio communication service using power supplied from the high-output power source unit. A program that causes a computer to execute processing.
When the attachment device is not connected, each of the first RF units uses at least one of the first wireless communication service and the second wireless communication service by using power supplied from the power supply unit. The program according to claim 7, further comprising a process to be executed.