Transceiver control with sleep mode operation

• US 5,838,720 A
• Filed: 02/23/1996
• Issued: 11/17/1998
• Est. Priority Date: 02/23/1996
• Status: Expired due to Term

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Teletransactions, Inc.
• Inventors: Morelli, Daniel J.
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Maddox, Michael W.
• Application Number:
  US08/605,914
• Time in Patent Office: 998 Days
• Field of Search: 375/219, 455/38.2, 455/38.3, 455/38.1, 455/343
• US Class Current: 375/219
• CPC Class Codes: H04B 1/1615 Switching on; Switching off, e.g. remotely battery saving circuits associated with selective call operation H04W52/00; details of power consumption reduction in a PLL, H03L7/0802, H03L7/14, H03L2207/08, H03L2207/18; muting amplifiers by gain control see H03G3/34
• CPC Class Codes: H04W 52/028 switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A transceiver which begins to power up the transmitter as soon as it is determined that a packet being received requires a response. A control circuit within the transceiver processes the packet as it is received to determine whether the packet requires a response. If it is determined that a response is necessary, the control circuit provides a control signal to the transmitter to power up the transmitter from a sleep mode even before the entire packet has been received and processed. The control circuit then continues to process the remainder of the packet as it is received while the transmitter powers up from the sleep mode. In this manner, the transmitter will become stabilized much earlier. Accordingly, the transceiver is able to respond more quickly than conventional devices and is thus able to increase response times and overall data exchange rates. Moreover, battery power of the transceiver is utilized more efficiently compared to devices which must continuously maintain the transmitter in a fully powered mode.

Claims

1. A transceiver apparatus, comprising:

a receiver portion for receiving a packet of information, the packet comprising indicia for indicating whether the packet is to be responded to, and the indicia preceding at least one of control information and data also included in the packet;

a transmitter portion for transmitting information, the transmitter portion being switchable, based on a control input, between a low power consumption mode and an active mode during which information is transmitted; and

a control circuit coupled to the receiver portion for processing the packet received by the receiver portion to determine whether the packet is to be responded to wherein, prior to the receiver portion receiving the entire packet, the control circuit evaluates the indicia and provides the control input to the transmitter portion to initiate a switch of the transmitter portion from the low power consumption mode to the active mode in the event the packet is to be responded to,

wherein the packet comprises a length field indicative of the length of the packet, and the control circuit compares the length of the packet to a predetermined criteria in connection with providing the control input to the transmitter portion.

2. The transceiver apparatus of claim 1, wherein the control circuit provides the control input to the transmitter portion prior to processing a substantial portion of the at least one of control information and data succeeding the indicia in the packet.

3. The transceiver apparatus of claim 1, wherein the transmitter portion requires approximately a time period Tsa to transition from the low power consumption mode to the active mode upon receipt of the control input, and wherein the transmitter portion begins transmitting the information less than time period Tsa following receipt of the entire packet by the receiver portion.

4. The transceiver apparatus of claim 1, wherein the indicia precedes data included in the packet.

5. The transceiver apparatus of claim 1, wherein the control circuit comprises a state machine.

6. The transceiver apparatus of claim 1, wherein the control circuit comprises a microprocessor.

7. The transceiver apparatus of claim 1, wherein the control circuit provides the control input to the transmitter portion substantially immediately after processing the indicia in the event a remaining length of the packet in terms of time is not substantially longer than a time period Tsa required by the transmitter portion to transition from the low power consumption mode to the active mode upon receipt of the control input, and delays provision of the control input to the transmitter portion following processing of the indicia in the event the remaining length of the packet in terms of time is substantially longer than Tsa.

8. A method for controlling a transceiver apparatus having a receiver portion for receiving a packet of information, and a transmitter portion for transmitting information, the transmitter portion being switchable, based on a control input, between a low power consumption mode and an active mode during which information is transmitted, the packet comprising indicia for indicating whether the packet is to be responded to, and the indicia preceding at least one of control information and data also included in the packet, the method comprising the steps of:

receiving the packet via the receiver portion; and

processing the packet received by the receiver portion by evaluating the indicia and providing the control input to the transmitter portion prior to the receiver portion receiving the entire packet to initiate a switching of the transmitter portion from the low power consumption mode to the active mode in the event the packet is to be responded to,

wherein the packet comprises a length field indicative of the length of the packet, and the step of processing comprises the step of comparing the length of the packet to a predetermined criteria in connection with providing the control input to the transmitter portion.

9. The method of claim 8, wherein the control input is provided to the transmitter portion prior to receipt by the receiver portion of a substantial portion of the at least one of control information and data succeeding the indicia in the packet.

10. A cellular communication system, comprising:

a network;

a host computer coupled to the network;

a plurality of base stations coupled to the network and communicating with the host computer, each of the base stations comprising a base station transceiver for transmitting and receiving wireless communications; and

a plurality of mobile terminals each for communicating with the network by way of at least one of the plurality of base stations, each of the plurality of mobile terminals having a mobile terminal transceiver for transmitting and receiving wireless communications with respect to the at least one of the plurality of base stations;

wherein the transceiver of at least one of the mobile terminals comprises;

a receiver portion for receiving a packet of information, the packet comprising indicia for indicating whether the packet is to be responded to, and the indicia preceding at least one of control information and data also included in the packet;

a transmitter portion for transmitting information, the transmitter portion being switchable, based on a control input, between a low power consumption mode and an active mode during which information is transmitted; and

a control circuit coupled to the receiver portion for processing the packet received by the receiver portion to determine whether the packet is to be responded to wherein, prior to the receiver portion receiving the entire packet, the control circuit evaluates the indicia and provides the control input to the transmitter portion to initiate a switch of the transmitter portion from the low power consumption mode to the active mode in the event the packet is to be responded to,

wherein the packet comprises a length field indicative of the length of the packet, and the control circuit compares the length of the packet to a predetermined criteria in connection with providing the control input to the transmitter portion.

11. The communication system of claim 10, wherein the control circuit provides the control input to the transmitter portion prior to processing a substantial portion of the at least one of control information and data succeeding the indicia in the packet.

12. A cellular communication system, comprising:

a network;

a host computer coupled to the network;

a plurality of base stations coupled to the network and communicating with the host computer, each of the base stations comprising a base station transceiver for transmitting and receiving wireless communications; and

a plurality of mobile terminals each for communicating with the network by way of at least one of the plurality of base stations, each of the plurality of mobile terminals having a mobile terminal transceiver for transmitting and receiving wireless communications with respect to the at least one of the plurality of base stations;

wherein the transceiver of at least one of the base stations comprises;

a receiver portion for receiving a packet of information, the packet comprising indicia for indicating whether the packet is to be responded to, and the indicia preceding at least one of control information and data also included in the packet;

a transmitter portion for transmitting information, the transmitter portion being switchable, based on a control input, between a low power consumption mode and an active mode during which information is transmitted; and

a control circuit coupled to the receiver portion for processing the packet received by the receiver portion to determine whether the packet is to be responded to wherein, prior to the receiver portion receiving the entire packet, the control circuit evaluates the indicia and provides the control input to the transmitter portion to initiate a switch of the transmitter portion from the low power consumption mode to the active mode in the event the packet is to be responded to,

wherein the packet comprises a length field indicative of the length of the packet, and the control circuit compares the length of the packet to a predetermined criteria in connection with providing the control input to the transmitter portion.

13. A transceiver apparatus, comprising:

a receiver portion for receiving a packet of information;

a transmitter portion for transmitting information, the transmitter portion being switchable, based on a control input, between a low power consumption mode and an active mode during which information is transmitted; and

a control circuit coupled to the receiver portion for processing the packet received by the receiver portion, wherein prior to the receiver portion receiving the entire packet, the control circuit provides a control input to the transmitter portion to initiate a switch of the transmitter portion from the low power consumption mode to the active mode,

wherein the packet comprises a length field indicative of the length of the packet, and the control circuit provides the control input to the transmitter portion substantially immediately after processing the length field in the event a remaining length of the packet in terms of time is not substantially longer than a time period Tsa required by the transmitter portion to transition from the low power consumption mode to the active mode upon receipt of the control input, and delays provision of the control input to the transmitter portion following processing of the length field in the event the remaining length of the packet in terms of time is substantially longer than Tsa.