Wireless communication equipment for remote station

• US 5,848,062 A
• Filed: 04/02/1997
• Issued: 12/08/1998
• Est. Priority Date: 04/02/1996
• Status: Expired due to Fees

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Ohno, Katsumaru
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US08/825,733
• Time in Patent Office: 615 Days
• Field of Search: 370/311, 370/321, 370/336, 370/337, 370/465, 370/468, 370/442, 370/458, 455/115, 455/38.3
• US Class Current: 370/311
• CPC Class Codes: H04B 1/036 Cooling arrangements
• CPC Class Codes: H04B 1/38 Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
• CPC Class Codes: H04B 1/56 with provision for simultaneous communication in two directions
• CPC Class Codes: H04B 7/2643 using time-division multiple access [TDMA] H04B7/2615, H04B7/2618 take precedence
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Wireless TDMA communication equipment for a remote station which does not require inner temperature control circuit in order to control the temperature, comprising battery saving control circuit wherein the signal indicating whether or not a signal from a two-wire/four-wire converter exists and an output from a temperature sensor is received, when the signal to be transmitted to the wireless communication equipment does not exist, a time for intermittently operating the power source supplied to the wireless communication equipment is changed according to the output from the temperature sensor, and a temperature control portion having data rate control circuit wherein when the signal to be transmitted exists, the battery saving circuit is stopped, so that a coding rate of the wireless communication equipment and a transmission burst time are changed according to the temperature detecting circuit.

Claims

1. A wireless communication equipment for a remote station transmitting a signal between the remote station and a base station by using a TDMA communication system comprising:

temperature detecting means for detecting an inner temperature in said wireless communication equipment;

first control means for changing a periodical time in which intermittently a power source operates, said power source supplies said wireless communication equipment, said periodical time is changed in response to the output of said temperature detecting means when said wireless communication equipment is in an idle state; and

second control means for changing a coding rate of said wireless communication equipment and a transmission burst time for said TDMA communication in response to the output of said temperature detecting means when said wireless communication equipment has a signal to be transmitted.

3. The wireless communication equipment according to claim 1, wherein said first control means comprising the steps:

repeating an intermittent operation for turning on/off said power source for a constant time at a predetermined period when the temperature obtained by said temperature detecting means is a predetermined temperature;

lengthening a time for turning off said power source when it is detected that the temperature obtained by said temperature detecting means is higher than the predetermined temperature, and for making a period for turning on/off said power source longer than said predetermined period; and

shortening the time for turning off said power source when it is detected that the temperature obtained by said temperature detecting means is lower than the predetermined temperature, and for making the period for turning on/off said power source shorter than said predetermined period.

5. The wireless communication equipment according to claim 1, wherein said second control means comprising the steps:

coding a coding rate of an inputted signal to said wireless equipment into a data having a predetermined rate when the temperature obtained by said temperature detecting means is the predetermined temperature;

switching said coding rate into the data having a lower rate than said predetermined rate and coding the switched data when it is detected that the temperature obtained by said temperature detecting means is higher than the predetermined temperature; and

switching said coding rate into the data having a higher rate than said predetermined rate and coding the switched data when it is detected that the temperature obtained by said temperature detecting means is lower than the predetermined temperature.

2. A wireless communication equipment for a remote station transmitting a signal between the remote stations and a base station by using a TDMA communication system comprising:

conversion means for converting an input/output signal into a predetermined form;

coding/decoding means connected to said conversion means, for receiving a temperature control signal, for coding the received temperature control signal into a digital data having a predetermined coding rate, and for decoding an output signal from a predetermined digital data;

transmission/reception means connected to said coding/decoding means, for receiving said temperature control signal, for transmitting a predetermined TDMA burst signal as a transmitted signal, and for outputting a demodulated data of a received wireless signal to said coding/decoding means;

temperature detecting means for detecting the temperature in said wireless communication equipment;

switch means for intermittently operating the power source supplied to said conversion means, said coding/decoding means and said transmission/reception means by receiving a battery saving signal;

battery saving control means for receiving the output from said temperature detecting means, and for changing the periodical time which intermittently operates the power source supplied to said wireless communication equipment according to the output from said temperature detecting means when said wireless communication equipment is in the idle state; and

data rate control means for stopping said battery saving control means when said wireless communication equipment has the signal to be transmitted, and for changing the coding rate of said coding/decoding means and said transmission burst time for said TDMA communication in response to the output of said temperature detecting means.

4. The wireless communication equipment according to claim 2, wherein said battery saving control means comprising the steps:

intermittently operating said power source when the temperature obtained by said temperature detecting means is the predetermined temperature, whereby the battery saving is carried out at a predetermined period;

lengthening the time for turning off said power source when the temperature obtained by said temperature detecting means is higher than the predetermined temperature, whereby said period is lengthened; and

shortening the time for turning off said power source when the temperature obtained by said temperature detecting means is lower than the predetermined temperature, whereby said period is shortened.

6. The wireless communication equipment according to claim 2, wherein said data rate control means comprising the steps:

reducing the coding rate of said coding/decoding means when the temperature obtained by said temperature detecting means is higher than the predetermined temperature;

increasing the coding rate of said coding/decoding means when the temperature obtained by said temperature detecting means is lower than the predetermined temperature; and

controlling a TDMA data burst time of said transmission/reception means by matching to said coding rate.