System and method for allocating physical random access channel resources

• US 8,861,453 B2
• Filed: 09/30/2011
• Issued: 10/14/2014
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: Tahoe Research Limited (f/k/a Learndale Limited) (Vector Capital Corporation)
• Original Assignee: Via Telecom Co., Ltd.
• Inventors: Wang, Guotong, Lee, Anthony
• Primary Examiner(s): Javaid, Jamal
• Application Number:
  US13/249,531
• Publication Number:
  US 20120082106A1
• Time in Patent Office: 1,110 Days
• Field of Search: 370310-350, 370/252, 455/522
• US Class Current: 370/329
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 74/0866 using a dedicated channel for access

Abstract

A system for allocating PRACH (Physical Random Access Channel) resources is provided in the invention. The system comprises a plurality of wireless terminals and a base station. The base station is configured to allow the plurality of wireless terminals to share an access slot comprising a plurality of M2M (Machine to Machine) preambles and a plurality of H2H (Human to Human) preambles, and configured to separate the plurality of M2M preambles from the plurality of H2H preambles.

Claims

1. An apparatus for allocating a plurality of channel resources, comprising:

a base station allowing a plurality of wireless terminals to share an access slot, the access slot comprising a plurality of Machine to Machine preambles and a plurality of Human to Human preambles, wherein the base station is configured for separating the plurality of Machine to Machine preambles from the plurality of Human to Human preambles and categorizing the plurality of Machine to Machine preambles as a Machine to Machine preamble group,

wherein at least one of the plurality of wireless terminals are Machine Type Communication devices, and

wherein one Machine to Machine preamble is selected from among the Machine to Machine preamble group by one of the plurality of wireless terminals according to a Hash function, and the Hash function is set according to an IMSI (International Mobile Subscriber Identity) of each of the plurality of wireless terminals.

2. The apparatus as claimed in claim 1, wherein the base station is further configured to notify a duration of the access slot to the plurality of wireless terminals.

3. An apparatus for accessing a base station by an access slot, comprising:

a machine type communication device selecting one Machine to Machine preamble among the access slot, wherein the access slot comprises a plurality of Machine to Machine preambles and a plurality of Human to Human preambles,

wherein the base station is configured for separating the plurality of Machine to Machine preambles from the plurality of Human to Human preambles and categorizing the plurality of Machine to Machine preambles as a Machine to Machine preamble group, wherein the base station allows a plurality of wireless terminals to share the access slot, and

wherein the one Machine to Machine preamble is selected among the Machine to Machine preamble group according to a Hash function, and the Hash function is set according to an IMSI (International Mobile Subscriber Identity) of the machine type communication device.

4. A method for allocating a plurality of channel resources, comprising the steps of:

allowing, by a base station, a plurality of wireless terminals to share an access slot, the access slot comprising a plurality of Machine to Machine preambles and a plurality of Human to Human preambles, wherein at least one of the plurality of wireless terminals are machine type communication devices;

separating, by the base station, the plurality of Machine to Machine preambles from the plurality of Human to Human preambles,

categorizing, by the base station, the plurality of Machine to Machine preambles as a Machine to Machine preamble group; and

selecting, by one machine type communication device, one Machine to Machine preamble among the Machine to Machine preamble group, wherein the one Machine to Machine preamble is selected among the Machine to Machine preamble group according to a Hash function, and the Hash function is set according to an IMSI (International Mobile Subscriber Identity) of the machine type communication device.

5. The method as claimed in claim 4, further comprising:

notifying, by the base station, a duration of the access slot to the plurality of wireless terminals.

6. The method as claimed in claim 4, wherein the channel resources are physical random access channel resources.

7. The method as claimed in claim 4, wherein the plurality of wireless terminals are classified as a Machine Type Communication device group and a mobile communication device group.

8. A system for allocating a plurality of channel resources, the system comprising:

a plurality of wireless terminals, wherein at least one of the plurality of wireless terminals are machine type communication devices; and

a base station allowing the plurality of wireless terminals to share an access slot, the access slot comprising a plurality of Machine to Machine preambles and a plurality of Human to Human preambles, wherein the base station is configured for separating the plurality of Machine to Machine preambles from the plurality of Human to Human preambles,

wherein the base station is further configured to categorize the plurality of Machine to Machine preambles as a Machine to Machine preamble group,

wherein one of the machine type communication devices is configured to select one Machine to Machine preamble among the Machine to Machine preamble group, and

wherein the one Machine to Machine preamble is selected among the Machine to Machine preamble group according to a Hash function, and the Hash function is set according to an IMSI (International Mobile Subscriber Identity) of each of the machine type communication devices.