Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1997-12-15
2001-02-20
Tsang, Fan (Department: 2746)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S550100, C455S412100, C455S556200, C455S557000, C455S552100, C455S421000, C455S422100, C455S432300, C455S072000
Reexamination Certificate
active
06192259
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable radio apparatus for transmitting and receiving a signal to and from a base station in a communication service area.
2. Description of the Related Art
Usually, a portable radio apparatus can communicate with a desired destination only when it is within an area where it can receive radio data from a base station of communication services, or a communication service area. Outside the communication service area, the portable radio apparatus cannot communicate with the desired destination. For the reason, a conventional portable radio apparatus, for example, an electronic organizer incorporating a radio modem, continuously displays on its display area information indicating whether or not the portable radio apparatus is within a communication service area to prevent its user located outside a communication service area from repeating an transmitting operation. In this manner, the user ascertains that his or her portable radio apparatus is located within a communication service area from content of the display area before transmission of data. Thus, such electronic organizer can reduce unnecessary transmitting operation by the user outside the communication service area.
However, in such portable radio apparatus, even if the user performs an operation for transmitting data outside a communication service area, he or she cannot transmit data until the portable radio apparatus enters into a communication service area. Therefore, the user should wait to transmit data until the portable radio apparatus enters into the communication service area. Alternatively, the user should return in communication service area as soon as possible. In addition, to transmit data to a desired destination, the user should ascertain that the portable radio apparatus is in a communication service area by purposely viewing the display area before he or she performs a transmission operation.
Japanese laid-open patent application heisei 6-224838 discloses a mobile telephone set in which the mobile telephone set determines whether it exists within a service area, and stores in a memory a phone number of a destination which is inputted while the telephone was located outside the service area. When the mobile telephone set enters into a service area, it automatically transmits the phone number stored in the memory, and connects a line with the destination for call.
Japanese laid-open patent application heisei 4-238421 discloses an automatic re-originating system which, when a mobile station moves outside a service area and becomes incapable of receiving data from a base station, the base station stores such data together with the phone number of the mobile station therein. When the mobile station returns to the service area, the base station automatically sends the stored data to the mobile station based on a calling signal from the mobile station in the service area.
Japanese laid-open patent application heisei 5-183624 discloses a radio telephone set in which, when an originating call arrives at a parent telephone set from a base station, the parent telephone set determines whether or not a child telephone set is located outside a radio wave coverage. When the parent telephone set determines that the child telephone set is located outside the radio wave coverage from the parent telephone set, that is, when a call cannot be established between the parent and the child telephone sets, the parent telephone set temporarily stores the message. When the child telephone set returns within the radio wave coverage from the parent telephone set, the parent telephone set sends the message to the child telephone set.
All of the foregoing systems send temporarily stored data to an applicable destination mobile station in the order that they were stored. Thus, if a plurality of data for the same destination mobile station are stored, the plurality of data should be individually sent to the same destination mobile station, Therefore, the number of transmission and receiving of data increases, so that the communication line cannot be efficiently used.
The mobile telephone set disclosed in Japanese laid-open patent application heisei 6-224838 in particular increases the number of transmission of the stored data, leading to increase of battery consumption. Therefore, the working time is shortened for the mobile station.
In addition, if the number of phone numbers and messages being stored increases, it is difficult to apply such conventional technologies to a portable radio apparatus with limited amount of memories which can be provided for the apparatus. In addition, it is necessary to previously provide a large capacity of memory for a portable radio apparatus not limited for the amount of memory which can be mounted. Therefore, the size of the apparatus itself cannot be reduced.
SUMMARY OF THE INVENTION
In view of the above, an object of the present invention is to provide a portable radio apparatus which can efficiently transmit data reserved for transmission outside a communication service area to a desired destination when the data is automatically transmitted within the communication service area.
Another object of the present invention is to provide a portable radio apparatus which can reserve much amount of data with a smaller capacity of memory for transmission when data is reserved for transmission outside the communication service area.
To attain the above objects, the portable radio apparatus of the present invention includes a memory for storing data to be transmitted and destination information outside a communication service area, data compression section for compressing said transmitted data, and transmission section for automatically transmitting said transmitted data based on said destination information within the communication service area.
Therefore, according to the present invention, since a plurality of data are transmitted together to one destination with only one transmission operation, it is possible to reduce the number of transmission and transmission time of reserved data as a whole, so that a communication line can be effectively utilized.
In another aspect, the portable radio apparatus of the present invention includes a memory for storing transmitted data and destination information outside a communication service area, data compression section for compressing the transmitted data, data decompression section for decompressing the transmitted data compressed by the data compression section, and transmitter section for automatically transmitting the transmitted data based on the destination information within the communication service area.
In addition, the present invention further includes determination section for determining whether or not the destination information has been stored in the memory, appending section for appending only the transmitted data to the destination information stored in the memory when the destination information is determined to be already stored in the memory, and transmitter section for automatically transmitting a plurality of transmitted data stored in the memory in a batch based on the destination information in the communication service area.
Furthermore, the present invention further includes determination section for determining whether or not the destination has data decompression section, and transmitter section for automatically transmitting the transmitted data to the destination stored in the memory based on the result of determination by the determination section.
With such arrangement, according to the present invention, when the user performs a transmission operation outside a communication service area, the transmitted data is compressed and temporarily held together with the destination information. When the portable radio apparatus moves within the communication service area, that is, when it returns to a state able to communicate, the transmitted data held is automatically transmitted.
In addition, when the user performs transmission operation of data
Ferguson Keith
NEC Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Tsang Fan
LandOfFree
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