OPTIMIZED TRANSMISSION OF MACHINE TYPE COMMUNICATION DATA FROM A MOBILE DEVICE TO A WIRELESS NETWORK

• US 20150023281A1
• Filed: 03/05/2013
• Published: 01/22/2015
• Est. Priority Date: 03/22/2012
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Wu, Huaming
• Granted Patent: US 9,635,652 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method of transmitting data from a UE to an eNB is provided. In response to a data transmission request from a MTC application, the UE chooses a preamble ID based on the data size and transmits a random access preamble message to the eNB. The eNB returns a random access response message to the UE. The random access response message identifies resource allocated in an uplink channel and includes one or more transmission power control parameters associated with the second uplink channel. After determining that the data size is less than or equal to the allocated resources in the second uplink channel, the UE transmits a scheduled transmission message to the eNB using the allocated resource in the second uplink channel at a transmission power level determined by the one or more transmission power control parameters.

Claims

1-20. -20. (canceled)

21. A method of transmitting data from a UE to an eNB, comprising:

at the UE;

generating a data transmission request, wherein the data transmission request identifies a transmission data size;

choosing a preamble ID for the request, wherein the preamble ID is at least in part dependent on the data size;

transmitting a random access preamble message to the eNB via a first uplink channel, wherein the random access preamble message includes the preamble ID;

receiving a random access response message from the eNB via a downlink channel, wherein the random access response message identifies resource allocated in a second uplink channel that is different from the first uplink channel and the random access response message includes one or more transmission power control parameters associated with the second uplink channel; and

after determining that the data size is less than or equal to the allocated resources in the second uplink channel, transmitting a scheduled transmission message to the eNB using the allocated resource in the second uplink channel at a transmission power level determined by the one or more transmission power control parameters.

22. The method of claim 21, wherein the first uplink channel is a Physical Random Access Channel (PRACH).

23. The method of claim 21, wherein the downlink channel is a Physical Downlink Shared Channel (PDSCH).

24. The method of claim 21, wherein the second uplink channel is a Physical Uplink Control Channel (PUCCH).

25. The method of claim 21, wherein the random access preamble message includes a random access preamble ID that corresponds to the transmission data size.

26. The method of claim 21, wherein the data to be transmitted is MTC data.

27. The method of claim 21, wherein the size of the data to be transmitted is less than a predefined value.

28. The method of claim 21, wherein the random access response message identifies a resource and a corresponding format associated with the second uplink channel.

29. The method of claim 21, wherein one or more transmission power control parameters includes a pathloss compensation that indicates a difference between a downlink pathloss estimate at the UE and an actual uplink pathloss through the second uplink channel.

30. The method of claim 21, wherein the random access response message includes an instruction that instructs the UE whether to report a number of sent random access preamble requests.

31. A mobile communications device for performing an enhanced random access procedure, comprising:

a wireless module for performing wireless transmissions and receptions to and from a base station of a wireless network; and

a controller module for;

receiving a data transmission request from a MTC application, the request including a data transmission size;

choosing a preamble ID for the data transmission request;

transmitting a random access preamble to the base station via the wireless module, wherein the random access preamble includes the chosen preamble ID;

receiving a random access response message from the base station via the wireless module, wherein the random access response message includes information about resource allocated for the data transmission request, and one or more transmission power control parameters;

determining a transmission power level based on the one or more transmission power control parameters;

transmitting a scheduled message using the determined transmission power level;

increasing the transmission power level in accordance with the one or more transmission power control parameters if the transmission of the scheduled message fails; and

repeating said transmitting and increasing steps until a successful transmission of the scheduled message or the transmission of the scheduled message has fails for at least a predefined number of times.

32. A method performed by an eNB for receiving MTC data from a UE, the method comprising:

at the eNB;

initializing MTC-specific transmission power control parameters and including the transmission power control parameters to in a system information block;

broadcasting the system information block to the UE within a cell associated with the eNB;

receiving a random access preamble message from the UE via a first uplink channel, wherein the random access preamble message includes a preamble ID chosen by the UE based on a size of the MTC data;

determining a second uplink channel in accordance with the preamble ID and allocating resource in the second uplink channel for the UE;

sending a random access response message to the UE via a downlink channel, wherein the random access response message identifies resource allocated in the uplink channel; and

receiving a scheduled transmission message from the UE using the allocated resource in the second uplink channel at a transmission power level determined by the transmission power control parameters, the scheduled transmission message including at least a portion of the MTC data.

33. The method of claim 32, wherein the first uplink channel is a Physical Random Access Channel (PRACH).

34. The method of claim 32, wherein the downlink channel is a Physical Downlink Shared Channel (PDSCH).

35. The method of claim 32, wherein the second uplink channel is a Physical Uplink Control Channel (PUCCH).

36. The method of claim 32, wherein the size of the MTC data is less than a predefined value.

37. The method of claim 32, wherein the random access response message identifies a resource and a corresponding format associated with the second uplink channel.

38. The method of claim 32, wherein the transmission power control parameters includes a pathloss compensation that indicates a difference between a downlink pathloss estimate at the UE and an actual uplink pathloss through the second uplink channel.

39. The method of claim 32, wherein the random access response message includes an instruction that instructs the UE whether to report a number of sent random access preamble requests.