SYSTEMS AND METHODS FOR REGISTERING MACHINE TYPE COMMUNICATIONS DEVICES AND SCHEDULING MACHINE TYPE COMMUNICATIONS DEVICE TRANSMISSIONS

• US 20140302846A1
• Filed: 04/05/2013
• Published: 10/09/2014
• Est. Priority Date: 04/05/2013
• Status: Active Grant

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Inventors: ZOU, Jialin
• Granted Patent: US 9,179,242 B2
• Time in Patent Office: Days
• US Class Current: 455/435.1
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 72/1268 of uplink data flows

Abstract

Methods of registering a Machine Type Communications (MTC) device for scheduling MTC device transmissions by a network element are provided. The method includes registering a MTC device. The registering includes assigning at least one resource block to the MTC device for transmitting at least one MTC device transmission. The registering includes establishing a triggering mechanism that detects when a trigger event occurs, such that when the trigger event occurs, the MTC device transmits the at least one MTC device transmission on the assigned at least one resource block. The registering includes configuring the network element to receive the at least one MTC device transmission based on the assigned resource block and the established triggering mechanism. The method includes allowing the MTC device to transmit the at least one MTC device transmission over the resource block that is assigned during the registration.

Claims

1. A method of registering a Machine Type Communications (MTC) device for scheduling MTC device transmissions by a network element, the method comprising:

registering, by the network element, a MTC device, the registering including,

assigning at least one resource block to the MTC device for transmitting at least one MTC device transmission,

establishing a triggering mechanism that detects when a trigger event occurs such that when the trigger event occurs the network element receives the at least one MTC device transmission from the MTC device on the assigned at least one resource block, and

configuring the network element to receive the at least one MTC device transmission based on the assigned resource block and the established triggering mechanism; and

allowing, by the network element, the MTC device to transmit over the at least one resource block assigned during the registering.

2. The method of claim 1, further comprising:

updating, by the network element, a schedule of active transmissions to include the at least one MTC device transmission to be transmitted on the assigned at least one resource block such that when the trigger event occurs the at least one MTC device transmission is transmitted on the assigned at least one resource block, the schedule of active transmissions scheduling at least one mobile terminal transmission to be transmitted on at least one resource block not assigned to the MTC device if at least one mobile terminal is within a service area of the network element.

3. The method of claim 1, wherein

the assigning assigns the at least one MTC device transmission to at least one time slot and at least one sub-carrier frequency of at least one resource block according to a start time of the at least one MTC device transmission and a maximum data size of the at least one MTC device transmission, and

the configuring configures the network element to demodulate and decode the at least one MTC device transmission during the at least one time slot on the at least one sub-carrier frequency.

4. The method of claim 1, wherein the registering further includes,

determining a received signal strength of the at least one MTC device transmission;

determining a desired transmission power of the at least one MTC device transmission based on the determined received signal strength;

notifying the MTC device to store the received signal strength and the desired transmission power as a reference transmission power for the MTC device, the MTC device using the reference transmission power to adjust future MTC device transmission power levels according to an open loop power control protocol.

5. The method of claim 1, wherein the trigger mechanism is one of,

a timer trigger and the network element receives the at least one MTC device transmission on the assigned at least one resource block according to a cycle period of a timer associated with an application of the at least one MTC device,

a paging trigger and the network element receives the at least one MTC device transmission on the assigned at least one resource block after the network element sends a page message to the MTC device requesting the at least one MTC device transmission,

an event trigger and the network element receives the at least one MTC device transmission on the assigned at least one resource block after the network element sends the MTC device an acknowledgement message acknowledging that an event has occurred at the MTC device.

6. The method of claim 5, wherein the registering includes,

determining a timing advance for the MTC device based on a delay time,

the delay time being based on a measured round trip propagation delay between the MTC device and the network element if the trigger mechanism is one of a paging trigger and an event trigger, and

the delay time being based on a measured one way propagation delay between the MTC device and the network element if the trigger mechanism is a timer trigger;

and

sending a message to the MTC device directing the MTC device to adjust a transmission start time according to the timing advance.

7. The method of claim 1, further comprising:

detecting that a trigger event has occurred based on the trigger mechanism;

in response to the trigger event occurring, receiving the at least one MTC device transmission from the at least one MTC device on the assigned at least one resource block;

decoding the at least one MTC device transmission; and

sending a message to the at least one MTC device if the network element fails to decode the at least one MTC device transmission.

8. The method of claim 7, further comprising:

determining a received signal strength of the at least one MTC device transmission, the received signal strength being based on a current transmission power of the at least one MTC device transmission; and

sending a message to the MTC device, the message directing the MTC device to,

store the current transmission power for transmitting future MTC device transmissions if the network element is able to demodulate and decode the at least one MTC device transmission,

re-transmit the at least one MTC device transmission with increased power after a delay if the network element fails to demodulate and decode the at least one MTC device transmission.

9. The method of claim 7, further comprising:

determining that overload conditions have occurred;

broadcasting, by the network element, to the MTC device to not transmit the at least one MTC device transmission on the assigned at least one resource block; and

blocking the MTC device transmission from transmitting the at least one MTC device transmission on the assigned at least one resource block to allow user terminals and other MTC devices within a service area of the network element to continue transmitting.

10. A method of scheduling registered Machine Type Communications (MTC) device transmissions by a network element, the method comprising:

detecting, by the network element, that a trigger event has occurred based on a trigger mechanism; and

receiving, by the network element, a MTC device transmission from a MTC device associated with the trigger event over a resource block based on the detecting, the resource block being previously assigned to the MTC device such that the network element is not required to perform a signaling procedure with the MTC device in order to transmit the MTC device transmission.

11. A method of transmitting a Machine Type Communications (MTC) device transmission by a MTC device that is registered with a network element, the network element scheduling MTC device transmissions, the method comprising:

receiving, by the MTC device, a message indicating that the MTC device is registered with a network element, and

at least one resource block assigned to the MTC device to transmit on; and

transmitting, by the MTC device, the at least one MTC device transmission over the assigned at least one resource block when a trigger event occurs, the at least one resource block being previously assigned to the MTC device by the network element.

12. The method of claim 11, wherein the trigger event is one of,

a timer trigger and the MTC device transmits the at least one MTC device transmission on the assigned at least one resource block according to a cycle period of a timer associated with an application of the MTC device,

a paging trigger and the MTC device transmits the at least one MTC device transmission on the assigned at least one resource block in response to receiving a page message from the network element, the page message requesting the at least one MTC device transmission,

an event trigger and the MTC device transmits the at least one MTC device transmission on the assigned at least one resource block in response to receiving an acknowledgement message from the network element, the acknowledgment message indicating that the network element received a message indicating that the trigger event occurred at the MTC device.

13. The method of claim 12, further comprising:

receiving a message from the network element directing the MTC device to adjust a transmission start time according to a timing advance, the timing advance being based on a delay time determined by the network element,

the delay time being based on a measured round trip propagation delay between the MTC device and the network element if the trigger is one of a paging trigger and an event trigger, and

the delay time being based on a measured one way propagation delay between the MTC device and the network element if the trigger is a timer trigger.

14. The method of claim 11, further comprising:

receiving a message including a determined timing advance based on a delay time,

the delay time being based on a measured round trip propagation delay between the MTC device and the network element if the trigger mechanism is one of a paging trigger and an event trigger, and

the delay time being based on a measured one way propagation delay between the MTC device and the network element if the trigger mechanism is a timer trigger; and

adjusting a start time of the MTC device according to the timing advance.

15. The method of claim 11, further comprising:

receiving a message directing the MTC device to,

store a current transmission power for transmitting future MTC device transmissions if the network element is able to demodulate and decode the at least one MTC device transmission, the current transmission power being a transmission power of the at least one MTC device transmission,

re-transmit the at least one MTC device transmission with increased power after a delay if the network element fails to demodulate and decode the at least one MTC device transmission.

16. The method of claim 11, further comprising:

receiving a message directing the MTC device to not transmit the at least one MTC device transmission on its assigned resource block due to overload conditions occurring in a service area of the network element.

17. A method of scheduling registered Machine Type Communications (MTC) device transmissions by a network element, the method comprising:

detecting, by a MTC device, that a trigger event has occurred; and

transmitting, by the MTC device, a MTC device transmission over a resource block, the resource block being previously assigned to the MTC device such that the MTC device is not required to perform a signaling procedure with the network element in order to transmit the MTC device transmission.