Methods and Nodes for Decoding of Contention Based Uplink Transmissions

• US 20170251496A1
• Filed: 08/27/2014
• Published: 08/31/2017
• Est. Priority Date: 08/27/2014
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Hglund, Andreas, Yilmaz, Osman Nuri Can
• Granted Patent: US 10,412,762 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

A network node (200), a wireless device (202) and methods therein, for decoding of contention based uplink transmissions of data in a cell served by the network node. The network node (200) registers the wireless device (202) for contention based uplink transmissions of data on a radio resource reserved for contention based uplink transmissions of data, e.g. when receiving a registration request sent from the wireless device, such that the wireless device (202) is included in a set (200a) of wireless devices being registered for contention based uplink transmissions of data on the radio resource in the cell. The network node (200) then performs blind decoding of uplink signals transmitted on the radio resource by considering the wireless devices in the set. In this way, the decoding is made more efficient by disregarding any other wireless devices in the cell which are not registered for contention based uplink transmissions of data on the radio resource in the cell.

Claims

1-34. -34. (canceled)

35. A method, performed by a network node of a radio network, for decoding contention-based uplink transmissions of data in a cell served by the network node, the method comprising:

registering a wireless device for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data; and

performing blind decoding of contention-based uplink transmissions on the radio resource by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.

36. The method according to claim 35, wherein the network node determines whether to register the wireless device or not based on at least one of:

a current load on the radio resource,

a current traffic load in the cell,

measurements of signals received from the wireless device,

the current number of registered wireless devices,

a subscription setting valid for the wireless device, and

preferences of the wireless device regarding communication parameters.

37. The method according to claim 35, wherein the network node de-registers the wireless device based on at least one of:

the radio resource is congested,

poor reception of signals transmitted from the wireless device,

a de-registration request has been received from the wireless device,

a predefined inactivity duration, during which the wireless device has not transmitted any data, has expired, and

a predefined registration duration, during which the wireless device has been registered, has expired.

38. The method according to claim 35, wherein the wireless device is registered responsive to receiving a registration request from the wireless device.

39. The method according to claim 35, wherein the network node sends an acknowledgement to the wireless device indicating that the wireless device is registered for contention-based uplink transmissions of data on the radio resource in the cell.

40. A network node of a radio network, the network node being configured to decode contention-based uplink transmissions of data in a cell served by the network node, the network node comprising:

communication circuitry configured for receiving contention-based uplink transmissions; and

processing circuitry operatively associated with the communication circuitry and configured to;

register a wireless device for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data; and

perform blind decoding of contention-based uplink transmissions on the radio resource by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.

41. The network node according to claim 40, wherein the processing circuitry is configured to determine whether or not to register the wireless device based on at least one of:

a current load on the radio resource,

a current traffic load in the cell,

measurements of signals received from the wireless device,

the current number of registered wireless devices,

a subscription setting valid for the wireless device, and

preferences of the wireless device regarding communication parameters.

42. The network node according to claim 40, wherein the processing circuitry is configured to de-register the wireless device based on at least one of:

the radio resource is congested,

poor reception of signals transmitted from the wireless device,

a de-registration request has been received from the wireless device,

a predefined inactivity duration, during which the wireless device has not transmitted any data, has expired, and

a predefined registration duration, during which the wireless device has been registered, has expired.

43. The network node according to claim 40, wherein the processing circuitry is configured to forward the wireless device'"'"'s registration to at least one other network node to make the registration valid across multiple cells of the radio network.

44. A method performed by a wireless device for enabling a network node of a radio network to decode contention-based uplink transmissions of data in a cell served by the network node, the method comprising:

sending a registration request to the network node for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data;

receiving an acknowledgement from the network node indicating that the wireless device is registered for contention-based uplink transmissions of data in the cell; and

transmitting data on the radio resource, thereby enabling the network node to perform blind decoding of the data by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.

45. The method according to claim 44, wherein the wireless device refrains from transmitting data on the radio resource responsive to receiving a de-registration message from the network node indicating that the wireless device is de-registered.

46. The method according to claim 44, wherein the wireless device sends a de-registration request to the network node responsive to deciding not to transmit any further data.

49. The wireless device according to claim 46, wherein the processing circuitry is configured to send a de-registration request to the network node responsive to deciding not to transmit any further data.

47. A wireless device configured to enable a network node of a radio network to decode contention-based uplink transmissions of data in a cell served by the network node, the wireless device comprising:

communication circuitry configured performing uplink transmissions in the radio network; and

processing circuitry operatively associated with the communication circuitry and configured to;

send a registration request to the network node for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data;

receive an acknowledgement from the network node indicating that the wireless device is registered for contention-based uplink transmissions of data in the cell; and

transmit, via the communication circuitry, data on the radio resource, thereby enabling the network node to perform blind decoding of the data by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.

48. The wireless device according to claim 47, wherein the processing circuitry is configured to refrain from transmitting data on the radio resource responsive to receiving a de-registration message from the network node indicating that the wireless device is de-registered.

50. A non-transitory computer readable storage medium storing a computer program for decoding contention-based uplink transmissions of data in a cell served by a network node, the computer program comprising instructions that, when executed on at least one processor of the network node, cause the network node to:

register a wireless device for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data; and

perform blind decoding of contention-based uplink transmissions on the radio resource by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.

51. A non-transitory computer readable storage medium storing a computer program for enabling a network node of a radio network to decode contention-based uplink transmissions of data in a cell served by a network node, the computer program comprising instructions that, when executed on at least one processor of a wireless device, cause the wireless device to:

send a registration request to the network node for contention-based uplink transmissions of data on a radio resource reserved for contention-based uplink transmissions of data;

receive an acknowledgement from the network node indicating that the wireless device is registered for contention-based uplink transmissions of data in the cell; and

transmit data on the radio resource, thereby enabling the network node to perform blind decoding of the data by considering wireless devices registered for contention-based uplink transmissions of data on the radio resource in the cell.