JP6675422B2 - Random access repeater, relay system and relay method thereof - Google Patents

Description

  The present invention relates to the field of communications, and more particularly, to a low power random access repeater, a relay system, and a relay method thereof.

  In the Internet of Things (IoT) or sensor networks, message coverage is typically performed through repeaters to increase network coverage. Forwarding each message once through one repeater is referred to as "one hop", but conventional repeaters have many limitations in practical use.

  In particular, the conventional repeater always maintains a high power consumption reception state in order to maintain the connection with the downstream node. In actual use, it is necessary to supply power with a battery due to the restrictions on the implementation environment.However, if the battery is supplied to the repeater that constantly maintains the reception state, the power is used up at high speed, and the life of the entire network is greatly shortened. , And maintenance costs will increase significantly.

  In order to achieve the purpose of power saving, in the conventional design, the repeater allocates one time slot to each downstream node that has a message transfer request. The repeater operates in the high power consumption reception state in the assigned time slot, and sleeps at other times.

  In actual use, the message transfer requests of some downstream nodes are triggered by events, but cannot be predicted in advance. If the repeater reserves time slots for these downstream nodes, energy will be wasted. If the number of downstream nodes is large, there is no time for the repeater to sleep due to reserved time slots. On the other hand, if the repeater does not reserve the time slot in the downstream node, the node is triggered by a specific event, so even if a message is created, transmitted to the repeater, and transferred, the repeater is in a sleep state. there is a possibility. In such a case, the communication device wakes up in a timely manner, cannot receive a message that needs to be transferred, and the communication stability of the entire network is greatly reduced.

  SUMMARY OF THE INVENTION It is an object of the present invention to overcome the disadvantages of the prior art, provide a networking method for mixed networks, extend the coverage of low-speed wireless communication networks through wireless repeaters, and support large-scale networking. The wireless relay does not need to perform scheduling for terminal communication, but only needs to perform periodic sleep according to a certain rule. A large number of terminals adjust the transmission time of an uplink message (for example, an event trigger signal) based on the sleep period of the repeater and transmit the adjusted message. The repeater receives and forwards the message, and finally receives the message at the base station. Can be done. The repeater is used only for receiving and transferring one or more messages of the terminal, and does not perform scheduling or designation of a time slot with respect to the message transmission time of the terminal.

  The technical solution adopted by the present invention to solve the technical problem is as follows.

  There is provided a random access relay method including the following steps. The repeater sends a broadcast signal, the terminal receives the broadcast signal, the terminal sends a message to the repeater within the random access time window of the repeater, the repeater completes the reception of the message, and transfers the message. After completion, send a confirmation message to the terminal.

  Preferably, the repeater determines its operation cycle and broadcast cycle in advance.

  Preferably, one operation cycle comprises a sleep and a random access time window, wherein the repeater is in a sleep or low power consumption operation state during sleep, receives a message during the random access time window, and receives a message. Forward.

  Preferably, one broadcast cycle includes signal transmission and idle, wherein the repeater transmits a broadcast signal during signal transmission and does not transmit a broadcast signal during idle.

  Preferably, the operation cycle of the repeater is determined by the repeater based on a certain rule or set based on a configuration command of the upstream base station.

  Preferably, the broadcast cycle of the repeater is determined by the repeater based on a certain rule or set based on a configuration command of the upstream base station.

  Preferably, the operation cycle and the broadcast cycle have different cycle frequencies.

  Preferably, a synchronization signal is included in the broadcast signal, and the terminal can determine the start time of the next random access time window of the repeater based on the synchronization signal.

  Preferably, after the terminal receives the broadcast signal, the terminal adjusts its own clock to realize synchronization with the time counting of the repeater, and based on a known operation cycle arrangement of the repeater, The method further includes ending the sleep or low power consumption operating state and determining a time to enter a random access time window.

  Preferably, a random access time window within the operation cycle is selected based on the operation cycle determined by the terminal, and the message is transmitted to the repeater.

  Preferably, immediately after the repeater has completed receiving one or more messages, it forwards the message to an upstream base station or another repeater.

  Preferably, after the repeater has completed receiving one or more messages, the transfer is performed after the random access time window of the upstream base station or another repeater has arrived.

  Preferably, after the repeater has completed receiving one or more messages, based on the time slot scheduling of the upstream base station or another repeater, the transfer is performed after the designated access time slot arrives. Do.

  The present invention further provides a random access repeater comprising:

  A wireless transceiver that transmits a broadcast signal in accordance with a determined broadcast cycle, receives and transmits a message from a terminal.

  A wireless transceiver and a control device for determining its own operation cycle and broadcast cycle, and controlling reception and transfer of the wireless transceiver within a random access time window.

  Preferably, the repeater includes at least two wireless transceivers, and performs message transfer directly between the two or more wireless transceivers and a control device thereof through a wired data interface or a control signal interface, or The message is transferred indirectly through one controller.

  Preferably, clock synchronization is performed between two or more wireless transceivers and a control device thereof through a clock signal interface or a control signal interface, and the clock synchronization includes clock frequency synchronization or clock phase synchronization.

  Preferably, the sleep or wake-up of each wireless transceiver and its controller can be independent of the other wireless transceiver and its controller, the wireless transceiver and its controller further use a control signal interface, Through the external control signal, other wireless transceivers and their control devices can be woken up.

  Preferably, one operation cycle includes a sleep and a random access time window, wherein the wireless transceiver and its control device are in a sleep or low power consumption operation state during a sleep and operate during a random access time window. .

  Preferably, one broadcast cycle includes signal transmission and idle, wherein the control device controls the wireless transceiver, transmits a broadcast signal during signal transmission, and does not transmit a broadcast signal during idle.

  Preferably, the operation cycle is determined by the control device based on a certain rule or set based on an arrangement command of the upstream base station.

  Preferably, the broadcast cycle is determined by the control device based on a certain rule, or set based on an arrangement command of the upstream base station.

  Preferably, the broadcast cycle is determined by the control device based on a certain rule, or set based on an arrangement command of the upstream base station.

  Preferably, the operation cycle and the broadcast cycle may have different cycle frequencies.

  Preferably, a synchronization signal is included in the broadcast signal, and the terminal can determine the start time of the next random access time window of the repeater based on the synchronization signal.

  Preferably, immediately after the wireless transceiver completes receiving one or more messages, it forwards the message to an upstream base station or another repeater.

  Preferably, after the wireless transceiver completes receiving one or more messages, the transfer is performed after the random access time window of the upstream base station or another repeater has arrived.

  Preferably, after the wireless transceiver completes receiving one or more messages, based on the time slot scheduling of the upstream base station or another repeater, transfer after the designated access time slot arrives I do.

  Finally, the present invention further provides a random access terminal comprising a repeater as described above, and a terminal receiving a broadcast signal transmitted by the repeater and transmitting a message to the repeater within a random access time window of the repeater. Provide an access relay system.

  Preferably, one operation cycle includes a sleep and a random access time window, wherein the wireless transceiver and its control device are in a sleep or low power consumption operation state during a sleep and operate during a random access time window. .

  Preferably, one broadcast cycle includes signal transmission and idle, wherein the control device controls the wireless transceiver, transmits a broadcast signal during signal transmission, and does not transmit a broadcast signal during idle.

  Preferably, the operation cycle is determined by the control device based on a certain rule or set based on an arrangement command of the upstream base station.

  Preferably, the broadcast cycle is determined by the control device based on a certain rule, or set based on an arrangement command of the upstream base station.

  Preferably, the broadcast cycle is determined by the control device based on a certain rule, or set based on an arrangement command of the upstream base station.

  Preferably, the operation cycle and the broadcast cycle may have different cycle frequencies.

  Preferably, a synchronization signal is included in the broadcast signal, and the terminal can determine the start time of the next random access time window of the repeater based on the synchronization signal.

  Preferably, immediately after the wireless transceiver completes receiving one or more messages, it forwards the message to an upstream base station or another repeater.

  Preferably, after the wireless transceiver completes receiving one or more messages, the transfer is performed after the random access time window of the upstream base station or another repeater has arrived.

  Preferably, after the wireless transceiver completes receiving one or more messages, based on the time slot scheduling of the upstream base station or another repeater, transfer after the designated access time slot arrives I do.

  Preferably, after the terminal receives the broadcast signal, the terminal adjusts its own clock to realize synchronization with the time counting of the repeater, and based on a known operation cycle arrangement of the repeater, The method further includes ending the sleep or low power consumption operating state and determining a time to enter a random access time window.

  Preferably, a random access time window within the operation cycle is selected based on the operation cycle determined by the terminal, and the message is transmitted to the repeater.

  The beneficial effect of the present invention is to realize the intelligent handoff of the whole network by partitioning the operation cycle of the repeater and broadcasting the broadcast signal, thereby optimizing the network scheduling and reducing the power consumption of the network However, the effect of improving the stability of network communication can be obtained.

  Next, the present invention will be described in more detail with reference to the drawings and embodiments. However, the networking method of the mixed network of the present invention is not limited to the embodiment.

  In order to more clearly describe the technical solution according to the embodiment of the present invention or the related art, a drawing for describing the embodiment or the related art will be briefly described below. Of course, the drawings according to the following description are merely some examples of the present invention, and other drawings may be created based on these drawings as a general engineer in the art.

FIG. 1 is a structural diagram of one random access relay system of the present invention.

FIG. 2 is a structural diagram of another random access relay system of the present invention.

FIG. 3 is a structural diagram of a random access repeater having one wireless transceiver and its control device of the present invention.

FIG. 4 is a flowchart showing the random access relay method of the present invention.

FIG. 5 is an explanatory diagram of an operation cycle and a broadcast cycle.

  Next, in order to ensure that those skilled in the art understand the technical solutions according to the present invention, the technical solutions according to the embodiments of the present invention will be described clearly in conjunction with the drawings according to the embodiments of the present invention. Give a complete explanation. Of course, the described embodiments are only some of the embodiments of the present invention and not all of the embodiments. Based on the embodiments according to the present invention, all other embodiments obtained by those skilled in the art are included in the protection scope of the present invention.

  Next, specific implementation of the present invention will be further described in connection with the drawings of the present invention.

  As shown in FIG. 1, the present invention provides a random access relay system, which includes a base station 101, a random access relay 102 and a terminal 103.

  The base station 101 establishes a connection with a random access repeater 102 in the network, and the random access repeater 102 can establish a connection with one or more terminals 103. The random access repeater 102 can receive the message of the terminal 103 only when the random access time window described in the present invention has arrived, and then transfer it to the base station 101. Terminal 103 receives the broadcast signal transmitted by random access repeater 102 and transmits a message to random access repeater 102 within the random access time window of the repeater.

  Referring to another networking method having the random access repeater of the present invention shown in FIG. 2, the random access relay system includes three types of base station 201, a plurality of random access repeaters, and a plurality of terminals 204. The only difference from FIG. 1 is that a plurality of random access repeaters are included in the system.

  Base station 201 establishes a connection with random access repeater 202 in the network. The random access repeater 202 establishes a connection with another random access repeater in the network. The random access repeater 203 establishes a connection with one or more terminals 204. The random access repeater 203 receives the message of the terminal 204 only when the random access time window described in the present invention has arrived, and then can transfer the message to the upstream random access repeater. After completing the reception of one or more messages, the random access relay 203 can transfer the messages in the following three types.

  Method 1: Transfer is performed after the random access time window of the upstream base station or another random access repeater has arrived.

  Method 2: Based on time slot scheduling of an upstream base station or another random access repeater, transfer is performed after a designated access time slot arrives.

  Method 3: Immediate transfer to an upstream base station or another random access repeater.

  Next, the structure of the random access repeater shown in FIGS. 1 and 2 will be described in detail with reference to FIG.

  Reference is made to the random access repeater for realizing the above random access relay system, including the wireless transceiver 301 and the control device 302 shown in FIG.

  The wireless transceiver 301 transmits and receives a wireless signal to a terminal, a base station, and another random access repeater. It transmits a broadcast signal according to a broadcast cycle determined under the control of the control device 302, receives and transfers messages from the terminal within a random access time window under the control of the control device 302, and sleeps or sleeps during sleep. Operates with low power consumption.

  The control device 302 determines the operation cycle and the broadcast cycle of the wireless transceiver 301 and its own, and performs the reception and transfer of the wireless transceiver 301 and the processing of the message received / transmitted from the terminal within the random access time window. Control.

  Another random access repeater for implementing the description of the present invention includes a wireless transceiver 401, a control device 402, a second control device 403, and a second wireless transceiver 404.

  The wireless transceiver 401 transmits a broadcast signal, receives a message from a terminal, and transfers the message according to the determined broadcast cycle.

  The control device 402 determines the operation cycle and the broadcast cycle of the wireless transceiver and its own, and controls the reception and transfer of the wireless transceiver within a random access time window, and the processing of the message received / transmitted from the terminal. .

  The above-mentioned one operation cycle includes a sleep and a random access time window, wherein the wireless transceiver and its control device are in a sleep or low power consumption operation state during sleep, and a wireless transmission and reception during the random access time window. The device receives the message and forwards the message. One broadcast cycle includes signal transmission and idle, wherein the wireless transceiver transmits a broadcast signal during signal transmission and does not transmit a broadcast signal during idle.

  The wireless transceiver 404 is for transmitting and receiving wireless signals to a base station or another random access repeater.

  The controller 403 wakes up from a sleep state based on a start time of a random access time window of another random access repeater, and receives / receives data from a base station or another random access repeater. This is for controlling the operation state of the wireless transceiver 404 including the processing of the transmitted message.

  A person skilled in the art understands that the above is only for the purpose of illustration, and in practice, a plurality of mutually communicable wireless transceivers and their control devices are integrated in a repeater, and both are operated in combination. You can understand that you can do it.

  The message transfer can be performed directly between two or more wireless transceivers and their control devices through a wired data interface or control signal interface, or indirectly through one control device. .

  One step further, clock synchronization is performed between two or more wireless transceivers and their control devices through a clock signal interface or a control signal interface. The clock synchronization includes clock frequency synchronization or clock phase synchronization.

  Alternatively, sleep or wake-up of each wireless transceiver and its control device can be independent of other wireless transceivers and its control device, and the wireless transceiver and its control device further use a control signal interface, Through the control signal, other wireless transceivers and their control devices can be woken up.

  After the wireless transceiver has completed receiving one or more messages, it can be forwarded in three different ways:

  Method 1: Immediate transfer to an upstream base station or another repeater.

  Method 2: Transfer is performed after the random access time window of the upstream base station or another repeater has arrived.

  Method 3: After the wireless transceiver completes receiving one or more messages, transfer after the designated access time slot arrives based on the time slot scheduling of the upstream base station or another repeater. I do.

  The structure of the random access repeater has been described above in connection with FIG. Next, the operation flow of the random access relay system will be described in detail with reference to FIGS.

  As shown in FIG. 4, the method includes the following steps.

  Step 1: The repeater transmits a broadcast signal.

  The repeater predetermines its operation cycle and broadcast cycle. One operation cycle includes a sleep and a random access time window, wherein the repeater is in a sleep or low power consumption operation state during sleep, receives a message during the random access time window, and transfers the message. One broadcast cycle includes signal transmission and idle, wherein the repeater transmits a broadcast signal during signal transmission and does not transmit a broadcast signal during idle. FIG. 5 shows the operation cycle and broadcast cycle of the repeater. Of these, the synchronous signal broadcast is transmitted during the signal transmission period, and the idle period until another signal transmission period.

  The operation cycle and the broadcast cycle of the repeater are determined by the repeater according to a certain rule or set based on the configuration command of the upstream base station, and further, the operation cycle and the broadcast cycle can have different cycle frequencies. .

  The operation cycle and the broadcast cycle can be flexibly arranged according to information such as power consumption of the repeater, requirements for battery life, and technical indexes of the crystal unit of the terminal. As a general arrangement principle, the higher the battery life requirement, the longer the sleep time in one operation cycle, and the lower the technical index of the crystal unit, the shorter the broadcast cycle. That is, the transmission frequency of the broadcast signal increases. The broadcast signal is accompanied by the synchronization information or the clock information of the repeater or both. The terminal can determine the start time of the next random access time window of the repeater based on synchronization information or clock information accompanying the broadcast signal.

  Step 2: The terminal receives the broadcast signal.

  The terminal receives the broadcast signal, and thereafter, the terminal adjusts its own clock based on the synchronization information or clock information accompanying the broadcast signal, realizes synchronization with the time counting of the repeater, And determines the time at which the repeater terminates the sleep or low power consumption operation state and enters the random access time window.

  Step 3: The terminal sends a message to the repeater within the random access time window of the repeater.

  Once there is an event trigger and the terminal needs to send a message to the repeater, the terminal chooses to send the message to the repeater within the random access time window of the repeater.

  Step 4: After the repeater has completed receiving and transferring the message, it sends a confirmation message to the terminal.

  After the repeater has completed receiving one or more messages, there are three types of transfer timings.

  Method 1: Transfer is performed after the random access time window of the upstream base station or another repeater has arrived.

  Method 2: Based on the time slot scheduling of the upstream base station or another repeater, transfer is performed after a designated access time slot arrives.

  Method 3: Immediate transfer to an upstream base station or another repeater.

  After completing the transfer, the repeater sends a confirmation message to the terminal.

  After receiving the confirmation message, the terminal determines that the message transfer was successful. When the terminal arrives at the scheduled time or receives the failure message, the terminal chooses to retransmit the message in a random access time window or to transmit the message to another relay.

  The above embodiments merely describe the specific implementation of the method of the present invention one step further, and the present invention is not limited to the embodiments, but is based on the substance of the technology of the present invention. All simple modifications, equivalent changes and modifications made to them are included within the protection of the technical solution of the present invention.

Claims (26)

A random access relay method including a relay station that relays access between a base station and a plurality of terminals,
The repeater determines an operation cycle and a broadcast cycle different from the operation cycle in advance,
The repeater transmits a broadcast signal including synchronization information ,
The terminal receives the broadcast signal,
The terminal sends a message to the repeater in the random access time window of the repeater,
The repeater has completed the visit of a message from the terminal, further after completing the transfer to the base station or another of the repeater, and transmits the determined acknowledgment message and the transfer of the message to the terminal has succeeded a step only contains
A random access relay method for performing the above steps within one random access time window . Unit of the operation cycle, and the sleep is a low power consumption state, the random access time window is a state in which the reception and transfer of the message is composed of,
The repeater is in a sleep or low power consumption operating state during the sleep,
The method of claim 1, wherein the repeater receives a message from the terminal during the random access time window, and further forwards the message to the base station or another repeater. The unit of the broadcast period, and a signal transmission state for transmitting the broadcast signal, a random access relay method according to claim 1 or 2 consisting of an idle state of not transmitting the broadcast signal. The broadcast cycle as the operation cycle, the random access relay method according to claim 1 having different periods frequencies. Based on the synchronization information in the broadcast signal, a random access relay method according to any one of claims 1 to 4 wherein the terminal determines the start time of the next random access time window of the repeater. Based on said start time of a random access time window, the random access relay method according to any one of claims 1 to 5 transmits a message to the relay of the operation period of the terminal is determined. After the repeater has completed the reception of one or more of the message, the random access relay according to any one of claims 1 to 6 immediately forwarded upstream to the base station or another by the repeater Method. A relay of a random access relay system including a relay for access relaying a base station and a plurality of terminals,
The repeater is
Finalized transmits a broadcast signal including synchronization information in accordance with the broadcast period, and at least two radio transceivers receives the message, and further transferred to the base station or another of the repeater from the terminal,
Wherein the wireless transceiver and the broadcast period that the operation cycle of itself and determined in advance,
And receiving from the terminal of said wireless transceiver in one of the random access time window, the base station or another control device and the including for controlling the transfer to the relay, a random access repeater. The repeater includes at least two wireless transceivers,
Via a wired data interface or control signal interface between the control unit and two or more of the wireless transceiver, a random access repeater according to claim 8 for transferring a message to the base station. Two or more of said radio transceiver and said control device between the clock signal interface, or through signal interface, clock synchronization and performs a random access according to claim 9 wherein the clock synchronization comprises a clock frequency synchronization or clock phase synchronization Repeater. One of the sleep or wake-up radio transceiver and wherein the controller is capable independently of other of said radio transceiver and said control device,
The radio transceiver and wherein the controller uses the control signal interface, through the external control signal, the random access repeater according to claim 9 in which other of said radio transceiver and said control device can wake-up. One said operation cycle is composed of a sleep and a random access time window,
The radio transceiver and the controller, wherein is in the operating state of sleep or low power during sleep, the random access relay according to any one of claims 8 to 11 operate in the random access time window vessel. One the broadcast period of the is composed of a signal transmission and idling,
Wherein the control device, a random access repeater according to the control the wireless transceiver transmits a broadcast signal in the signal transmission, any one of claims 8 to 12 does not transmit the broadcast signal in the idle. It determined based on the predetermined rule the operation period by the control device, or random access relay station according to any of claims 8 to 13 on the basis of the upstream arrangement command of the base station is set. Random access repeater according to any one of claims 8 to 14 wherein the broadcast cycle or is determined based on the predetermined rule by the control unit, or based on the upstream arrangement command of the base station is set. Random access repeater according to any one of claims 8 to 15 and the operation period and the broadcast cycle may have different periods frequencies. Based on the synchronization information of the broadcast signal, a random access relay station according to any of claims 8 to 16 wherein the terminal is capable of determining the start time of the next of said random access time window of the repeater. After the wireless transceiver has completed the reception of one or more messages, a random access relay according to any one of claims 8 to 17 immediately transferred upstream to the base station or another by the repeater vessel. After the wireless transceiver has completed the reception of one or more messages, to claim 8 wherein the random access time window upstream of the base station or another by the repeater transfers from the incoming 19. The random access repeater according to any one of 18. Said relay station according to any of claims 8 to 19,
Random access, including, said terminal to send a message to the same the repeater to the random access time window of the repeater receives the broadcast signal transmitted in one of the random access time window, the repeater Relay system. Unit of the operation cycle, and the sleep is a low power consumption state, the random access time window is a state in which the reception and transfer of the message is composed of,
The radio transceiver and the control device is in the operating state of sleep or low power during the sleep, switching system according to claim 20 operating in the random access time window. Switching system according to configured claim 20 or 21 units of the broadcast period, and a signal transmission state for transmitting the broadcast signal, an idle state of not transmitting the broadcast signal, from. 23. The relay system according to claim 20, 21 or 22 , wherein the broadcast cycle is set based on an arrangement command of an upstream base station. Switching system according to any one of claims 20 to 23, wherein the broadcast cycle as the operation cycle can have different periods frequencies. The wireless transceiver according to any one of claims 20 to 24, wherein after completing reception of one or more messages from the terminal , the wireless transceiver immediately transfers the message to an upstream base station or another one of the repeaters. Relay system. Switching system according to any one of claims 20 to 25 based on said synchronization information, the terminal determines the start time of the next random access time window of the repeater.