Indicating E-DCH resources for E-RACH

Patent metadata

Field	Value
Publication number	US-9497777-B2
Application number	US-73941608-A
Country	US
Kind code	B2
Filing date	Oct 28, 2008
Priority date	Nov 1, 2007
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

In UMTS WCDMA a new RACH-based uplink is being discussed. The request for uplink transmission resource is made using a mechanism based on the conventional RACH. The main difference from the conventional RACH is that the data transmission uses a high-speed uplink packet data channel, known as Enhanced Dedicated Channel (E-DCH), instead of a single short message associated directly with the RACH preamble. One proposed scheme for indicating the E-DCH resources to be used creates a link between the values of each of a group of multiple signatures sent on the AICH (to acknowledge the E-RACH access) and a specific set of E-DCH parameters defined in a table. We propose to signal the set of resources to be used independently from acknowledging the E-RACH access. One possible method is to transmit information in the unused portion of the AICH (corresponding to 1024 chips every slot) indicating the resource set.

First claim

The invention claimed is:

1. A method of a primary station giving a secondary station access to a resource:
receiving from the secondary station, a preamble for requesting access to the resource, wherein each resource is associated in a predetermined way to each preamble;
modifying a response to the preamble depending on whether or not the resource associated with the preamble is available;
transmitting only an acknowledgement indication of the access request when the resource associated with the preamble is available; and
transmitting an acknowledgement indication and an identification of a different resource for use by the secondary station when the resource associated with the preamble corresponds with a high-speed uplink data packet channel and the resource is not available.

2. The method of claim 1 , wherein the different resource is identified by transmitting information indicating the resource in an unused portion of an AICH.

3. The method of claim 1 , wherein the indication of a different resource may comprise transmission of one or more additional signatures, and/or some additional identifying bits in a reserved field at the end of the normal acknowledgement signal.

4. The method of claim 1 , wherein the preamble comprises at least one of a signature and a timeslot.

5. The method of claim 1 , wherein resources are grouped into a plurality of sets of resources and each particular resource is indicated by identifying both the set, and an index in the set.

6. A primary station for giving a secondary station access to a resource, said primary station comprising:
a receiving circuit configured to receive an access request to a resource including a preamble for requesting access to the resource from the secondary station wherein each resource is associated to each preamble; and
a processing circuit configured to transmit to the secondary station, via a transmitting circuit and in response to the access request, an acknowledgement indication of the access request and an indication of a different resource for use by the secondary station when a requested resource is associated with a high-speed uplink data packet channel and the requested resource is not available and to respond to the access request with only an acknowledgement when the the requested resource is available.

7. A method of a primary station giving access to a resource to a secondary station, said method comprising:
receiving from the secondary station, an access request to a resource including a preamble for requesting access to the resource, wherein each resource is associated to each preamble;
modifying a response to the access request depending on whether or not the resource associated with the preamble is available;
transmitting an acknowledgement indication of the access request, and an indication of a different resource to be used by the secondary station when a requested resource is associated with a high-speed uplink data packet channel and the requested resource is not available, wherein when the requested resource is available, transmitting only an acknowledgement.

8. The method of claim 7 , wherein the indication of a different resource comprises at least one of a transmission of one or more additional signatures, and some additional signaling bits in a reserved field at an end of the acknowledgement indication.

9. A secondary station for request from a primary station access to a resource, said secondary station comprising:
a transmitter circuit configured to transmit to a primary station an access request to a resource including a preamble for requesting access to the resource, wherein each resource is associated to each preamble; and
a processing circuit configured to receive, via a receiving circuit, from the primary station an acknowledgement indication of the access request and an indication of a different resource to be used by secondary station when the a requested resource is associated with a high-speed uplink data packet channel and the requested resource is not available, and when the requested resource is available to receive only an acknowledgment.

10. The secondary station of claim 9 , wherein the processing circuit is further configured to receive, via the receiving circuit, the indication of the different resource in an unused portion of an Acquisition Indicator Channel (AIM).

11. The secondary station of claim 9 , wherein the processing circuit is further configured to receive, via the receiving circuit, additional signaling bits in a reserved field following an end of the acknowledgement indication, the additional signaling bits corresponding to the indication of the different resource.

12. The secondary station of claim 9 , wherein the access request comprises at least one of a signature and a timeslot.

Assignees

• Baker Matthew P J
• Moulsley Timothy J
• Koninklijke Philips Nv

Inventors

• Baker Matthew P J
• Moulsley Timothy J

Classifications

• H04W74/0866 Primary

  using a dedicated channel for access · CPC title

• H04W74/006 Primary

  in the downlink, i.e. towards the terminal · CPC title