TW200812328A - Low duty cycle network controller - Google Patents

Abstract

Operating at least one low duty cycle (LDC) controller to maintain synchronization between the LDC controller and a plurality of LDC terminals operating over a communication network using only overhead channels of the network and conforming to the protocol and timing of said network, wherein synchronization between the LDC controller and the plurality of LDC terminals is maintained separately from the protocol and timing of the communication network, and enables the LDC controller to schedule power down and wake up of the plurality of LDC terminals for durations longer than allowable under the protocol and timing of the communication network.

Description

200812328 IX. INSTRUCTIONS OF THE INVENTION: TECHNICAL FIELD OF THE INVENTION The present invention generally relates to data transmission via a telecommunications network and to a telecommunications apparatus for a u-pass. More particularly, the present invention relates to novel techniques for maintaining synchronization with a telecommunications device in a half-duplex mode for a low duty cycle data transfer operation. [Prior Art] 1 Operational Distance &&<>> may involve capturing operational status information and transmitting the operational status information via a radio frequency signal to a remotely located battery operated wireless telecommunications device of the centrally located information processing device. Typically, operational status information can be transmitted as short messages via radio frequency signals. In such remote monitoring, the application of the application towel, the problem associated with power consumption management is an important in the /, ii operation % i brother, the need for battery operation monitoring, electric shovel to promote operational efficiency and reduce Maintenance costs. Implementation efficiency factor: Electricity: Group elimination: The configuration of the power supply unit and the self-contained unit that is easily installed at multiple sites are improved. . B.., dimension 4 cost because the early element does not have the right = the sex and because the faulty unit can be easily replaced by another unit and the time is better, the most need to monitor and operate the telecommunications device Time period without battery pack replacement or similar operations.

Extend the battery pack's life, table, or ct + L 7 to reduce the load required by the battery pack. Lift. The telecommunication device located at the end can be configured to operate in the root cycle, and the user is not in the reduced working time... There is no ongoing hand to communicate with (for example, the communication at the center of the beacon processing device) In sleep mode or low power operation 122118.doc 200812328 Wu style. 4 w requires the availability of telecommunications equipment for powering information processing. The battery packs are traded off. However, the use of a reduced amount of the device may be shut down to save the battery device in the sleep mode device for optimal communication because of its 戋:甬;:: technology remote telecom. That is: this is used in the information center. The communication by the terminal device is only accidental. Therefore, the remotely monitored information processing device operating in the field is designed to be configured to communicate with the transmission device according to the low duty cycle. A means of synchronizing the exchange of information between the bits with which the device communicates. In a complaint, reveal a way for you to use a Jrr as a low duty cycle (LDC) controller. The method includes using only _, s p w h to use a load channel of the network and operating in accordance with the protocol and timing of the network at least - low duty cycle (10)

Maintaining the synchronization between the LDC control and the plurality of LDC terminals operating via the communication network, the synchronization between the basin of the Octopus 4LDC controller and the plurality of ldC terminals is independent of the communication network The agreement and timing are maintained, and the LDC controller is capable of powering down the plurality of LDC terminals, waking up to privilege to achieve a duration that is allowable over the protocol and timing of the communication network. Long duration. ^ ~, reveal a low duty cycle (LDC) network system. The system first includes an > an LDC controller that operates using only the load channel of a communication network and conforms to the protocol and timing of the network to maintain the controller and the plurality of operations via the communication network 122118.doc 200812328 ::=:: between the LDC controller and the plurality of LD c terminals, the μ 5 v is maintained independently of the protocol and timing of the communication network, and The sink controller can _ the number of terminals that are powered off and wake up to achieve a longer duration than the agreement and timing of the communication network. Brother ♦ In the other way, the invention includes tangible storage media that uses at least _cafe 2 to operate a computer program on the Internet. The program includes executable instructions that cause a computer to operate at least one low duty cycle (LDC) controller to maintain the LDC using only a load channel of a communication network and comply with the protocol and timing of the network Synchronization between the controller and a plurality of LDC terminals operating via the network, wherein the protocol and timing of the same (four) independent communication network between the ldc controller and the plurality of DC terminals are maintained And enabling the LDC controller to schedule power down and wake-up of the plurality of LDC terminals to achieve a duration that is longer than the allowable duration of the protocol and timing of the communication network. [Embodiment] The nature, purpose and advantages of the present invention will become more apparent from the detailed description of the appended claims. Introduction In the case of the remote monitoring of the remote operation of the dog and the above-mentioned problems associated with the transmission of information via radio frequency signals, the present invention is described to use only the telecommunication network in the half-duplex mode ( For example, a load channel such as a cdma or a gsm network's cellular network controls and synchronizes several palladium instances of communication. The operational status information is located in the center of the information processing device in a manner that is configured to transmit messages in a half-duplex mode according to a low-operation 122118.doc 200812328 cycle (LDC) operation. The controller hosted by the premises receives. In an embodiment, the centrally located information processing device of the LDC controller is located in a CDMA network or is connected to a processor of the CDMA network, such as a base station controller or other network controller. And the remote communication device is a wireless telecommunication device that includes CDMA communication capabilities. In another embodiment, the load channel for CDMA 2_ lx (First Evolution) includes a pilot channel, a synchronization channel, and a paging channel in the forward link and an access channel in the reverse link. . For circle A culvert 1X then 第 (first - evolution only support information _ (FimEv.

The load channel of Data Only)) includes the pilot channel, the synchronization channel and the control channel in the forward link, and the access channel in the reverse link. In other embodiments, the load channel includes any non-service channels that provide reference, timing, system configuration, and access. At (:1)]^8 should be used to provide a two-way appointment with the Guanglu/Thai channel to carry out a telephone conversation, such as the main information of the 艾 艾 涪 唬 唬 。 术语 术语 术语 术语 术语 术语 术语 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半 半Modes that charge W or receiver at the same time but do not serve as (9) at the same time: two...cycle, (LDC) refers to the intermittent and accidental activity of the operation. 4 匕 each ^ letter device. A device that is located at the far end of the heart, including the term 'sleep mode', is used to record the sleepy state of the sleepy eye and to close the communication device other than the timing device between (4). Doc 200812328 Mode of communication device with soap TL. For LD (: application, the duration of sleep is substantially longer than the agreed duration of the conventional wireless communication network. For example, the sleep is held...

The time of knowledge is usually substantially longer than the CDMA time slot period. The vacancy mode π refers to the mode of the communication device that the device is awakened for normal operation. For example, idle mode in a CDMA system includes slot mode operation. How the sleep and idle modes of the LDC operation of the month are related to the time slot period of the communication system. This communication system can be, for example, a cdma based system. The main feature is that the idle mode is significantly shorter in duration than #眠^' as shown at the top of Figure 1. The near view of the idle mode period can be defined by a wake-up time of 1〇〇 and a power-down time of 11〇. Or, idle-', σ by wake-up time, and an idle mode duration of 12 〇 也 也 也 , , , , , , , , , , , 根据 根据 根据 根据 根据 根据 根据 根据

In the middle of the fire (4) power outage time 11G. The near view further shows the CDMA 糸, and the time slot period can be significantly shorter in duration than the LDC idle mode 120, which is shown as 跨越^^, and the LDC idle mode 120 is displayed as spanning 5 Time slot period. The time slot is adjusted to π ^ on the solid to indicate the communication under the protocol of the communication network = the wake-up/sleep cycle is set. Lie (for example) can range from 128 seconds to 163 84 seconds (time slot period 7). However, having a time slot period is not suitable for LDC purposes because the sleep mode of the terminal can be extended from the pigeon 8 & knife clock to 1 month or longer (far longer than the maximum slot time period). k丨1, 1 U, for example, by waking up the battery every 163.84 seconds according to the CDMA time slot period 7, and the power supply device constructs a one-month duty cycle. 122118.doc •10-200812328 will exhaust the battery pack Wake up faster than the end of each 1 month period. Because (a) the sleep cycle provided by the agreement such as CDMA, which forms the basis of the existing communication infrastructure, is uncomfortably short for the relatively long-term sleep of the LDC terminal, and (b) the typical remotely located LDC terminal The machine is dormant most of the time and cannot be accessed by the network facilitating communication, so a mechanism for synchronizing the communication between the centrally located information processing device and the terminal is required. Low duty cycle controller The block diagram of Figure 2 provides an overview of the relationship between an LDC controller 200 and the LDC controller 200 that is assigned tasks to maintain synchronization with a plurality of LDC terminals 230a through 230N. As shown, communication is facilitated by a communication infrastructure 220 that represents an existing system for communication including, for example, wireless telephone language communication. In an embodiment, communication infrastructure 220 is a CDMA system. The LDC controller 200 is a host or processor that is typically hosted by or co-located with a centrally located information processor that is implemented as a component of the communications infrastructure 220. The information processor can be, for example, a base station, a server, or a call processing center. In an embodiment, there is at least one LDC controller 200. The LDC controller 200 formulates the message that is passed to the communication infrastructure 220 for delivery to 1^(: one or more of the terminals 23 0 to 23 (^): the controller 200 receives in the opposite direction Messages that are passed through the communication infrastructure 220 and formulated by the LDC terminals 230A through 230N. In an embodiment, the message thus received by the LDC controller 200 can include information about a terminal 122118.doc -11 - 200812328 230A The location of 230N, its mode of operation, its wake-up time, and its wake-up persistence. In another embodiment, the message transmitted by the LDC controller 2 includes configuration information for a terminal 230. From _LDC The message of the terminal 23 can be stored in the memory 210 in the same manner as the configuration information and message transmitted externally along the downlink and scheduled by the LDC controller 2 for transmission to the LDC terminal 23. Synchronization is required between the LDC controller 200 and the terminals 230A-230N because the relatively long sleep time intervals of the LDC terminals 230A-230N make it inaccessible to the network that forms the basis of the communication infrastructure 22. One of the depicted use profiles 24 〇A exhibits LDC operating parameters such as wake-up time 1 〇〇, power-down time 110, and offset 25 〇 A from the timing reference. Similarly, other usage profiles 240B, 240C as shown illustrate different duration offsets. 250B, 250C. The offset will be discussed in more detail below. The ldc terminal 230A enters the idle mode at wake up 100. In an embodiment using a CDMA communication system, the activity performed by an LDC terminal 230 during the idle mode This includes typical slotted mode operations such as listening to paging channels, receiving messages, and sending messages. Terminals 23A through 23〇N enter sleep mode at power down u' during this time period, LDC terminals 230A through 230N are generally Sleeping evil (except for keeping timing references) to minimize power consumption of the battery pack. Therefore, communication between an LDC controller 200 and an LDC terminal 230 must be synchronized to cause such communications to occur at the LDC terminal. The idle mode of the machine 230 is 'and does not attempt to communicate during its sleep. The advantages provided include attribution to non-intrusive coverage of the existing communication infrastructure. The advantage of synchronizing the communication is enabled. 122118.doc -12 - 200812328 f Figure 3 illustrates a typical CDMA communication infrastructure. The class channel of the load channel 300 is shown as being separated from the traffic channel. The traffic channel 31 includes, for example, a full duplex channel for voice communication, and the rain 2 is assigned to (4) the user to carry all traffic. The load channel includes the I duplex forward link 32G and the reverse Chain channel 330. The forward link channel 320 includes a synchronization channel for the channel access system that provides the beacon functionality for the initial system to retrieve the required system parameters, and a paging for carrying messages, paging, messages, and commands. aisle. Reverse link channel 330 typically includes an access channel used by the remote device to transmit (4) requests, call origination requests, pass-through responses, command responses, and other two-way requests as required by the system agreement. Embodiments of the present invention provide for maintaining synchronization with a plurality of LDC terminals 2 through 2, using the protocol and timing of the network that forms the basis of only the half-duplex communication channel. However, the schedule inherent in synchronization does not depend on the protocol and timing of the network because of its own timing, and is therefore independent of their agreement and timing. Synchronization substantially covers the protocols required to facilitate primary communication via load channel 300. For example, in an embodiment, communication between an LDC controller 2 and the ldc terminal 230 autonomously conforms to the CDMA slot mode agreement when the LDC terminal 23 is in the idle mode. However, the scheduling of the construction synchronization is generally defined without reference to the timing inherent in the cdma slot mode association. That is, as a further example 'transmitting according to the timing and agreement of the communication network, a message sent from the [DC controller 200 to an LDC terminal 23A includes information about a wake-up time-off time of 11 〇. Configuration message, but the terminal employs 122118.doc -13- 200812328 The actual wake-up and power-off is in accordance with the information contained in the message, and does not have to comply with the timing and agreement of the network carrying the message. Therefore, the extended sleep time interval of the LDC terminals 230 0 A to 23 0N can be accommodated, because the timing inherent to the agreement of the communication infrastructure 220 (e.g., CDMA slot mode sleep) is not necessarily a factor in the synchronization schedule. In one embodiment, an LDC controller 200 provides configuration information to the LDC terminal 230, wherein the information includes synchronization parameters defining a time window. Four illustrative usage profiles assigned to four LDC terminals 230 identified as LDC terminals 1, 2, N-1 and N are shown in FIG. The usage profile of the LDC terminal 1 depicts two idle mode cycles 400 and an intervention sleep mode 405. The usage profile of the LDC terminal 2 is substantially the same as that of the LDC terminal 1 except for the time offset to the right. The usage profiles of the LDC terminals 1 and 2 are covered by dashed lines 410, 420 indicating the times Tbegin and Tend, respectively. Tbegin and TEND are configuration parameters provided by the LDC controller 200 that enable the maintenance of a common timing reference between the LDC controller 200 and the LDC terminal 230. More specifically, Tbegin and Tend enclose the periods in which LDC terminals 1 and 2 enter and leave idle mode 400. That is, the LDC controller 200 instructs an LDC terminal 230 to wake up at a time within the time interval defined by Tbe gin and Tend, and enters the sleep mode at a time other than the time interval. The given values TBEGin and Tend' can define the wake-up time 100 of LDC terminals 1 and 2 as offsets 430, 440, respectively, from TBegin. The offsets 430, 440 are typically determined by a hashing method to distribute the wake-up time 100 substantially evenly over the time interval defined by Tbegin and Tend. Similar time windows for LDC terminals N-1 and N are respectively defined by dashed lines 4 1 5, 425, within which offsets 122118.doc -14 - 200812328 450, 460 are hashed to define a corresponding wake-up time of 100 . In an embodiment, each LDC terminal 230a to 230N performs a hash alone. In another embodiment, the hash is performed by the LDC controller 200 and the results are communicated to the LDC terminal 230. An LDC controller 200 provides the parameters TBEGIN & TEND to the LDC terminals 1, 2, N-1 and N in this manner. LDC terminals 1 and 2 receive values defining a first time window, and LDC terminals N-1 and N receive values defining a second window. The wake-up time 1 of the LDC terminals 1 and 2 is hashed in the form of the offsets 43 0, 440 from the Tbegin associated with the first window, and the wake-up time 100 of the LDC terminals N-1 and N is The Tbegin associated with the second window is hashed in the form of offsets 45, 460. Thereby, the messages transmitted by the LDC terminals 1, 2, N-1 and N to an LDC controller 200 are substantially evenly distributed over time when received at the LDC controller 200 to prevent, for example, load channels. 3〇〇 and the uneven load (i〇ad) at the LCD controller 200. In one embodiment, the LDC terminal 2 is not notified of the power down time of the LDC terminal 2: 30A to 23 ON. In other words, the LDC terminals 230A to 230N only stop transmitting messages until the next wake-up time 100 occurs. The usage profile is generally defined in terms of the mode of operation required for an LDC terminal 230. For example, an operational mode that accommodates periodic meter reading may define an overview of the wake-up time 100 that is scheduled to occur once a month. Another example is an operating mode that accommodates vehicle position reporting from an L D C terminal 230, and an overview of the usage of the wake-up time 100 once per hour is appropriate for the mode of operation. Yet another example includes a so-called s〇s mode in which an emergency location report from one of the LDC terminals 230 coupled to a person may be required. 122118.doc 15 200812328 A usage profile for scheduling transmissions every 5 minutes. In one embodiment, synchronization of an LDC controller 200 with an LDC terminal 230 involves a reachability state with respect to the LDC terminal 230. A state machine depicting the reachability state is shown in FIG. Initially at 500, the LDC terminal 230 is unreachable 510. When the LDC controller 200 receives a keep-alive (KA) message 520 from the LDC terminal 230, a reachability state 530 is established. The LDC controller 200 can thus treat the LDC terminal 230 as, for example, in an idle mode, indicating that subsequent communications can begin. The LDC controller 200 receives additional KA messages 540 from the LDC terminal 230 that each maintains the reachable state 530. If a timeout 550 occurs, i.e., the LDC controller 200 fails to receive the KA message from the LDC terminal 230 after a predetermined amount of time has elapsed, the LDC controller 200 treats the LDC terminal 230 as unreachable 510. Therefore, when an LDC terminal 230 is considered unreachable by the LDC controller 200, it can also be assumed to be, for example, in a sleep mode. Upon receipt of a subsequent KA message 520 from the LDC terminal 230, the LDC terminal 200 again treats the LDC terminal 230 as reachable 530. In an embodiment, when a KA message is received from an LDC terminal 230 The LDC controller 200 marks the LDC terminal 230 as reachable and stores the current time as the last received KA message timestamp. If the LDC controller 200 does not receive a subsequent KA message from the LDC terminal 230 after the predetermined time interval elapses, or the LDC controller 200 fails to send a message to the LDC terminal 230 for a predetermined number of sleep intervals, then The LDC controller 200 marks the LDC terminal 230 as unreachable. If the LDC controller 200 has flagged the LDC terminal 230 as unreachable because it failed to send a message to the LDC terminal 230 for a predetermined number of sleep periods 122118.doc -16 - 200812328, and the LDC controller 200 The LDC controller 200 can then send a configuration message to the LDC terminal 230 to reconstruct the synchronization from the LDC terminal 230 thus marked as unreachable. In another embodiment, between a usage profile that provides a wake-up time of one LDC terminal 230 with a resolution of less than one day and an usage profile that provides a wake-up time of 100 with a resolution of one or more days. distinguish. In the former case, synchronous scheduling is implemented, and in the latter case, asynchronous scheduling is used. A synchronization schedule 600 for an embodiment is illustrated in FIG. A timetable of an LDC controller 200 and an LDC terminal 230 is shown. It should be understood that FIG. 6 depicts a time table of a single LDC controller 200 and a single LDC terminal 230, and an embodiment of the present invention provides at least one LDC controller 200 and a plurality of LDC terminals 23 0 to 23 (^. Based on the idiom (}1>|510, one of the terminals 605 has been hashed and is known to the LDC controller 200 and the LDC terminal 230. The LDC controller 200 has received The message of the LDC terminal 230, which has been stored in the memory 210 and will be classified in the memory 210 according to the target LDC terminal 230 and future transmission time. Generally at the wake-up time 605, the LDC controller 200 transmits 615 - includes a message for any stored message of the LDC terminal 230. The message is received 620 at the LDC terminal 230. The LDC controller 200 receives a response message from the LDC terminal 230. Before the power outage time 610 is reached The LDC controller 200 can receive 632- or more messages from the LDC terminal 230. This message can be, for example, a KA message including information about operational status, battery status, network information, and requests for configuration data. In an embodiment, the tend appears and LDC terminal 122118.doc -17- 200812328 After machine 230 is considered to be in sleep mode, LDC controller 200 selects 640 pending messages for LDC terminal 230 and schedules them for the next transmission time, thereby interacting with LDC terminal 230 The next idle mode cycle is consistent. Generally at the next wake-up time 642, the LDC controller sends 645 pending messages to the LDC terminal 230, after which the LDC controller 200 receives 650-messages from the LDC terminal 230. The LDC controller 200 can view The amount of time remaining before the power down time 652 continues to receive 632 other messages, such as KA messages. In another embodiment, the power down is dynamically adjusted based on the number and nature of messages sent and received by the LDC controller 200. Time 610, 652. For example, if the number of pending messages is too large to be carried by a single message sent by the LDC controller 200 615, 645, then only 615, 645 - partial pending messages will be sent. Once from the LDC terminal 230 Receiving 630, 650 to a message, the LDC controller 200 can then reset and extend the power down time 610, 652. The LDC controller 200 can then transmit in a manner similar to the previous one (not shown) The subsequent or remaining portion of the pending message. This process can continue until all pending messages are sent by the LDC controller 200. Figure 7 illustrates an embodiment of the wake-up time 100 as in the resolution using a profile indication greater than one day. The asynchronous schedule 700 is executed. The LDC controller 200 initially treats the LDC terminal 230 as unreachable. The LDC controller 200 does not process the LDC terminal 230 until it receives 630 an unsolicited message sent by the LDC terminal 230 after the hash wake-up time 605 of the LDC terminal 230. The LDC controller 200 formulates and transmits 645 - a message including any pending messages stored in the memory 210 and scheduled for transmission. If the number of pending messages is too large to be included in the message sent by the LDC controller 200 to 122118.doc -18-200812328 to the LDC terminal 230, once the [DC terminal 230 receives 632 to another message, the LDC controller 200 responds by sending a (not shown) subsequent portion or remainder of the pending message in a manner similar to the previous one. In one embodiment of the invention, the LDC controller 200 continues to receive 632 messages from the LDC terminal 203 substantially until the power down time 61 。. Such messages may include KA messages as discussed with respect to the synchronization schedule illustrated in FIG. In a further embodiment, the power down times 61〇, 652 are dynamically adjusted based on the number and nature of the messages transmitted and received by the LDC controller 200. For example, if the number of pending messages is too large to be carried by a single message sent by the Ldc controller 200 645, 665, only 615, 645 of the pending messages will be sent. Upon receiving 632 to a message from the LDC terminal 230, the LDC controller 200 can reset and extend the power down time 6 〇, 652, and the LDc terminal 23 保持 will remain in the idle mode until the power down time 61 〇, 652 . The LDC controller 200 can then transmit subsequent portions or the remainder of the pending message in a manner similar to the prior. This process can continue until all pending messages are sent by the ldc controller 200. At approximately the next wake-up time 642, the LDc controller again receives 660 - unsolicited message from the LDC terminal 230. Embodiments employing the above LDC controller operations can be used in many different applications, including asset tracking, automatic meter reading, cashless payments for parking meters, traffic lights and sensors, billboards and public displays, instant health, Home/office security and alarm systems, vehicle information services: (automotive telematics), utility distribution grid monitoring, location monitoring using ο” and other related inquiries. Message transmission for these applications can be 122118.doc -19 - 200812328 Within the scope of an SMs message for each parent asset of the self-assessment application. Those who are familiar with this technology, 7 cups, one... know that you can use any of a variety of different techniques and techniques to express the signals and signals. Niu Yi Xi J5, can be voltage, current,

Electromagnetic waves, magnetic fields or particles, P or %, or any combination thereof, are used to represent the data, persons, signals, bits, symbols, and chips that are referred to in the above description. Those skilled in the art will further appreciate that various descriptions, modules, circuits, and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented as electronic hardware, stun Private tail soft body or a combination of the two. To clearly illustrate this interchangeability of hardware and software, the above has generally described various illustrative components, blocks, modules, circuits, and steps in terms of functionality. Whether this functionality is implemented as hardware or software depends on the particular application and design constraints imposed on the overall system. Those skilled in the art will be able to implement the described functionality in a different manner for a particular application, but such implementation decisions should not be construed as a departure from the scope of the invention. Generalizable processing|§, digital signal processor (DSP), special application integrated circuit (ASIC), field programmable gate array (FPGA), or other programmable logic designed to perform the functions described herein The apparatus, discrete gate or transistor logic, discrete hardware components, or any combination thereof, implement or perform the various illustrative logic blocks, modules, and circuits described in connection with the embodiments disclosed herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microprocessor or state machine. The processor can also be implemented as a combination of computing devices, for example, a DSp and a microprocessor 122118.doc -20- 200812328 = combination, a plurality of microprocessors, a combination - a Dsp core or a plurality of processors or any Other such configurations. The steps of the method described in connection with the pull group disclosed herein or the application examples of the two embodiments may be implemented directly in a combination of hardware and execution by a processor. The software module can be resident in RAM memory, flash memory, r〇m memory, (4) (10) memory, EEPRQM memory, scratchpad, hard monument, removable w, CD_ or technical towel. Know any other form

, in storage media. The exemplary storage medium is coupled to the processor such that the information is read from the storage medium and the information is written to the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and storage media can be resident in the ASIC. In addition, the previous description of the disclosed embodiments is provided to enable a person skilled in the art to make or use the invention. Various modifications to the embodiments are readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates an exemplary relationship between LDC operation and CDMA slot mode sleep. 2 is a block diagram illustrating a communication path between an LDC controller and an LDC terminal using an existing communication infrastructure. Figure 3 illustrates the half-duplex use of the load channel used to facilitate the communication between the LDC controller and the LDC terminal 122118.doc -21 - 200812328. Figure 4 illustrates the hash of the LDC wake-up time. Fig. 5 illustrates the accessibility of the modeled LDC terminal. Fig. 6 is a diagram showing the synchronization schedule using the LDC controller. Fig. 7 is a timing chart for explaining the state machine using the non-synchronous row of the LDC controller. Timetable of the program 100 Wake-up time 110 Power-off time 120 200 210 Idle mode duration LDC controller Memory

220 230A, 230B, 230N 240A 240B 240C 250A 250B Communication Infrastructure LDC Terminal Usage Overview Usage Overview Usage Profile Offset Offset 250C Offset 300 Load Channel 310 Traffic Channel 320 Forward Link Channel 330 Reverse Link Channel 4 〇〇 Idle Mode Period 122118.doc -22- 200812328 405 Intervention Sleep Mode 410 Dotted Line 415 Dashed Line 420 Dashed Line 425 Dashed Line 430 Offset 440 Offset 450 Offset 460 Offset 510 Unreachable 520 Keep Connected Message 530 Reachability State 540 Hold Connection message 550 Timeout 600 Synchronization schedule 605 Wake-up time 610 Power-off time 642 Wake-up time 652 Power-off time 700 Asynchronous schedule Tbegin Time Tend Time 122118.doc -23-

Claims (1)

200812328 X. Patent application scope: 1. A method comprising: ^ using a load channel of a communication network and complying with a protocol stone of the network: operating at least one low duty cycle (ldc) controller to maintain the at least Synchronization between an LDC controller and a plurality of cafés operating via the communication network, wherein V, wherein at least - the f-sync between the LDC controller and the plurality of LDC terminals is independent of the communication network The agreement and timing of the road are maintained, and • &gt;) until the evening of £1; (:: the controller can perform the power-off of the plurality of LDC terminals and call the Si (4) to reach an agreement with the communication network in time. The method of claim 1, wherein the at least one LDC controller comprises: transmitting network information from the at least one LDC controller to the plurality of LDC terminals. • Shiming: The method of item 1 wherein the operation is at least - the LDC controller comprises: the status information of the parent LDC terminal is stored in one of the storage units of the at least one LDC controller. 3 method, wherein The status information includes: location information of each LDC terminal. 5. The method of claim 3, wherein the status information comprises: one of each LDC terminal operating mode. 6. The method of claim 3 , wherein the status information includes: a wake-up time of one of the LDC terminals. 7. The method of claim 3, wherein the status information includes: · 122118.doc 200812328 &quot; one of the HMC terminals The duration of the wake-up. 8. The method of "monthly!", wherein the operation is at least - the controller comprises: coordinating the wake-up time of the plurality of LDC terminals such that the message transmitted by the plurality of LDC terminals is received The at least one ldc controller is substantially evenly distributed in time. 9. The method of claim 8, wherein the coordinating the plurality of 1^〇(: the wakeup time of the terminal comprises: 'the plurality of LDC terminals The wake-up time is hashed as having a time offset. 10. The method of claim 8, further comprising: performing a message to be transmitted from the at least one LDC controller to the plurality of lDc terminals The method is such that the information is received at the plurality of LDC terminals substantially uniformly distributed in time. 11. The method of claim 1, wherein the operating at least one LDC controller comprises: based on a parent-LDC terminal One of the machines uses the profile to schedule a wake-up time for each of the ldc terminals. 12. The method of claim 1, wherein the at least one LDC controller is maintained independently of the protocol and timing of the communication network Synchronization between the plurality of LDC terminals includes: maintaining, for each LDC terminal, a timing reference synchronized with the at least one LDC controller, wherein the timing reference allows tracking of one of the wake times of each of the LDC terminals. 13. The method of claim 12, further comprising: 122118.doc 200812328 when it is expected that no LDC messages will be received or transmitted via the communication network for at least a period of time, except for the timing ^ = an LDC terminal Power off, the time reference is configured to power the LDC terminal. The method of claim 12, further comprising: when the calling room is small for a small day, the communication terminal is transmitted to the at least one ldc controller. The method of claim 14, further comprising: 〇 at least - LDC control ϋ from the end of each connection message, a J ^ f is used for the reachability status flag of the parent-LDC terminal Indicating and storing as reachable 16. A low duty cycle (LDC) network system comprising: at least an LDC controller that uses only the load channel of a communication network and conforms to the protocol and timing of the network Operating to maintain the at least -LDC controller between a plurality of coffee terminals operating via the communication network: synchronization, wherein the at least -LDC controller and the plurality of LDC terminals are synchronized from each other The protocol and timing of the communication network are maintained, and the 仵em LDC controller can schedule power-off and wake-up of the plurality of LDC terminals to achieve an allowable agreement and timing of the communication network. Duration of duration. 17. As requested in item 16 The system, wherein the operation is at least - the LDC controller transmits the network message to the plurality of LDC terminals. 122118.doc 200812328 The system of claim 16 wherein the operation is at least - the LDC controller stores each LDC terminal The status information. 19. The system of item 18, wherein the status information includes: location information of each LDC terminal. 2〇·如明求ι ι8 system, wherein the status information includes: The operating mode of one of the LDC terminals. The system of claim 18, wherein the status information comprises: a wake-up time of each of the LDC terminals. 22. The system of claim 18, wherein the status information comprises: One of the mysterious LDC terminals wakes up. 23. The system of claim 16, wherein the operation at least one ldc controller coordinates the f-number of LDC terminals to cut the time by the plurality of ldc terminals The transmitted message is received at the at least one LDC controller as a system that is substantially evenly distributed over time. The system of the terminology 23, wherein the at least one LDC controller comprises: a hash unit for The wake-up times of the plurality of LDC terminals are hashed as having a time offset. 25. The system of claim 23, further comprising: a scheduler for transmitting from the at least one LDC controller to The messages of the plurality of LDC terminals are scheduled such that the messages are received at the plurality of LDC terminals substantially uniformly distributed in time. 26. The system of claim 16, wherein the at least - the LDC controller The invention includes a scheduler for scheduling the wake-up time of one of each LDC terminal based on the usage profile of each of the LDCs. 27. The system of claim 16, wherein each LDC terminal maintains a timing reference synchronized with the at least one LDC controller, wherein the timing reference allows tracking of each of the LDC terminals Wake up time. 28. The system of claim 27, further comprising: a keep-alive message transmitted from the per-LDC terminal to the at least one ldc controller when the wake-up time is less than a day. 29. The system of claim 28, further comprising: maintaining at least one of: at least one LDC controller for a reachability status flag for each of the ldc terminals, the reachability status flag being at least The controller is indicated as reachable when the LDC terminal receives the keep-alive message. 3. A low duty cycle (ldc) network system that includes: a load channel for the communication network and conforms to the network low duty cycle (LDC) controller to maintain Means for operating at least one synchronization between the at least LDC terminals using only one communication network timing and timing; and 122118.doc 200812328 and timing cover the protocol and timing of the communication network. 32. The LDC network system of claim 31, further comprising: providing timing synchronization between the at least one LDC controller and the plurality of [DC terminals] such that the protocol and timing of the LDC network can be extended A component that is outside the limits of the agreement and timing of the communication network. 33. A computer program stored in a tangible storage medium for operating a network using at least one controller, the executable instructions comprising: using only a load channel of a communication network and complying with the protocol and timing of the network Having a computer operate at least one low duty cycle (LDC) controller to maintain an instruction to synchronize between at least one LDC controller and a plurality of LDC terminals operating via the communication network. The synchronization between the Haiyue y LDC controller and the plurality of terminals is maintained independently of the protocol and timing of the communication network, and the at least one LDC controller can be enabled for the plurality of LDC terminals. Power outages and wakeups are scheduled to achieve a duration that is longer than the allowable duration of the protocol and timing of the communication network. </ RTI> wherein a computer is operable to operate at least one LDC 34. The computer program of claim 33, wherein the executable instructions of the controller include: the LDC controller transmits to the 'where one computer operates at least one LDC to enable a computer to network The message is from the executable instructions of at least a plurality of LDC terminals. The computer program of claim 33, wherein the executable instructions of the controller are: The status information of the LDc terminal is stored in the at least 122118.doc 200812328 36. The computer program of claim 33, wherein causing a computer to operate at least one of the executable instructions of the DC controller comprises: causing a computer to coordinate the plurality of LDC terminals The wake-up time of the machine is such that messages transmitted by the plurality of LDC terminals are received at the at least one controller as executable instructions that are substantially evenly distributed over time. 2. The computer program of claim 36, wherein the executable instructions for causing a computer to coordinate the wake-up time of the plurality of nine terminals comprises: causing a computer to hash the wake-up times of the plurality of LDC terminals to have Time-shifted executable instructions. The computer program of claim 37, further comprising: causing the computer to schedule the message transmitted from the at least one LD c controller to the plurality of LDC terminals to cause the messages to be in the plurality of LDCs The terminal is received as a steerable command that is substantially evenly distributed over time. 39. The computer program of claim 33, wherein the executable means for causing a computer to operate the at least one controller comprises: causing the computer to wake up one of each of the LDC terminals based on a usage profile of each of the LDC terminals Time to execute executable instructions for scheduling. 40. The computer program of claim 33, wherein the executable instructions for maintaining synchronization of the at least one LDC controller and the plurality of LDC terminals independently of a protocol and timing of the computer include: A computer maintains a time-referenced executable instruction for each LDC terminal in synchronization with the at least one lDc controller, wherein the timing reference allows to track the time of each of the LDC terminals to wake up 122118.doc 200812328. 41. The computer program of claim 40, further comprising: causing a computer to receive or transmit an expected LDC-free message via the load channel of the communication network, in addition to the timing reference external-LDC terminal The power-off executable instruction, the timing reference is configured to power the LDC terminal when the wake-up time is reached. 42. The computer program of claim 40, further comprising: causing a computer to hold the connection aperture from the UX: terminal to the 妾° hole command in the wake-up time less than one day. The LDC control can be executed. The computer program of claim 42 further encloses a computer to enable the computer to receive the keep-alive message when the at least one LDC controller receives the connection message from the HMC controller. Use, π, search for the secret of the North -, for the mother of a UDC terminal can reach the sorrowful flag;) = show ^ day and save as reach / 1 execution instruction. 122118.doc