PACKET SWITCHED CONNECTIONS USING DEDICATED CHANNELS

• US 20080267123A1
• Filed: 07/03/2008
• Published: 10/30/2008
• Est. Priority Date: 05/29/2002
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Zeira, Eldad, Terry, Stephen E., Iacono, Ana Lucia, Zhang, Guodong, Hunkeler, Teresa Joanne, Zaki, Maged, Stern-Berkowitz, Janet
• Granted Patent: US 7,738,508 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/52 based on load
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/30 Connection release
• CPC Class Codes: H04W 76/38 triggered by timers

Abstract

A temporary (temp) dedicated channel (DCH) is used to support communications. The temp-DCH channel is a channel that is assigned to a user having a set duration. After the duration expires, the channel is automatically released to the user. Embodiments of the invention relate to establishing the temp-DCH channel, determining the data rate and duration of the channel. Other embodiments relate to establishing back-to-back temp-DCH channels and the implementation details of these embodiments. Additionally, one embodiment relates to adding a start/stop function to the medium access controller which can be used in conjunction with temp-DCH as well as other applications.

Claims

1. A wireless transmit/receive unit (WTRU) comprising:

a radio link controller configured to establish a dedicated channel having a predetermined duration and to disestablish the dedicated channel at the end of the predetermined duration; and

a receiver configured to receive packet data over the established dedicated channel for the predetermined duration.

2. The WTRU of claim 1 wherein the dedicated channel includes a predetermined transmission data rate based on a perceived overhead and an amount of collected packet data.

3. The WTRU of claim 1 wherein at the expiration of the set duration, a second dedicated channel is established by the radio link controller.

4. The WTRU of claim 1 wherein the established second dedicated channel has a same transport format combination than a original established dedicated channel.

5. The WTRU of claim 1 wherein the established second dedicated channel has a different transport format combination than an original established dedicated channel.

6. A wireless transmit/receive unit (WTRU) comprising:

a medium access controller (MAC) configured to schedule data transmissions;

a radio link controller configured to send the MAC PDUs for data transmission over a specified logical channel; and

a start/stop device configured to start or stop a request for PDUs by the MAC over the specified logical channel in a particular radio frame.

7. The WTRU of claim 6 wherein the start/stop device is a primitive effectively coupled between a radio resource controller and the MAC.

8. The WTRU of claim 6 wherein when the specified channel is started, the specified channel is active and when the specified channel is stopped, the specified channel is inactive.

9. The WTRU of claim 8 wherein when the MAC selects a transmit format combination selection, the MAC considers a buffer occupancy excluding data for inactive channels.