System and method for DRX control and NACK/ACK

• US 8,483,624 B2
• Filed: 08/19/2008
• Issued: 07/09/2013
• Est. Priority Date: 08/20/2007
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Research In Motion Limited (Blackberry Limited)
• Inventors: Cai, Zhijun, Womack, James Earl
• Primary Examiner(s): GONZALES, APRIL GUZMAN
• Application Number:
  US12/193,991
• Publication Number:
  US 20090054006A1
• Time in Patent Office: 1,785 Days
• Field of Search: 455/574, 455/73, 370/252, 370/321, 370/328, 370/349, 370/473, 370/458, 714/748, 340/7.32
• US Class Current: 455/73
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04W 40/005 Routing actions in the presence of nodes in sleep or doze mode
• CPC Class Codes: H04W 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Methods of combining semi-persistent resource allocation and dynamic resource allocation are provided. Packets, such as VoIP packets, are transmitted on the uplink and downlink using respective semi-persistent resources. For each mobile device, awake periods and sleep periods are defined. The semi-persistent resources are aligned with the awake periods so that most of the time the mobile device can turn off its wireless access radio during the sleep periods. In addition, signalling to request, and to allocate, resources for additional packets are transmitted during the awake periods, and the resources allocated for the additional packets are within the awake windows.

Claims

1. A method of receiving acknowledgement [ACK] or negative-acknowledgement [NACK] in a device comprising:

configuring the device for discontinuous reception [DRX] having at least one awake period and at least one sleep period such that a receiver of the device is always on during the awake period, and the receiver of the device is on for at least some portion of the sleep period following the awake period; and

receiving ACK or NACK information during the sleep period when the device is configured not to monitor Layer 1 for Channel Control Elements [CCEs].

2. A method of transmitting acknowledgement [ACK] or negative-acknowledgement [NACK] in a device comprising:

configuring the device for discontinuous reception [DRX] having at least one awake period and at least one sleep period such that a receiver of the device is always on during the awake period, and the receiver of the device is on for at least some portion of the sleep period following the awake period; and

transmitting ACK or NACK information during the sleep period when the device is configured not to monitor Layer 1 for Channel Control Elements [CCEs].

3. A wireless device comprising:

a receiver configured for discontinuous reception [DRX] having at least one awake period and at least one sleep period such that the receiver is always on during the awake period, and the receiver is on for at least some portion of the sleep period following the awake period; and

the receiver further configured to receive acknowledgement [ACK] or negative-acknowledgement [NACK] information during the sleep period when the device is configured not to monitor Layer 1 for Channel Control Elements [CCEs].

4. A wireless device comprising:

a receiver configured for discontinuous reception [DRX] having at least one awake period and at least one sleep period such that the receiver is always on during the awake period, and the receiver is one for at least some portion of the sleep period following the awake period; and

a transmitter configured to transmit acknowledgement [ACK] or negative-acknowledgement [NACK] information during the sleep period when the device is configured not to monitor Layer 1 for Channel Control Elements [CCEs].

5. A method in a wireless device having a radio, the method comprising:

controlling the radio to have on and off periods during which the radio is on, and off, respectively, the periods during which the radio is on having a nominal on duration and the periods during which the radio is off having a nominal on duration when the device is configured not to monitor Layer 1 for Channel Control Elements [CCEs];

receiving a transmission during a period the radio is on;

transmitting an acknowledgment [ACK] or negative-acknowledgment [NACK] corresponding to the transmission at a time determined for ACK or NACK transmission, without regard to whether the radio is otherwise in an off period.

6. The method of claim 5 further comprising:

making uplink transmissions;

receiving any expected ACK or NACK in respect of uplink transmissions, without regard to whether the radio is otherwise controlled in an off period.