US 2013/0170480 A1 · UPLINK RANDOM ACCESS DATA CHANNEL WITH HARQ

Abstract

Devices and methods are provided for managing random access data channels in a wirelessly-enabled communications environment. An uplink (UL) random access (RA) channel is implemented to send data to an access point (AP) without requiring a UL allocation grant message to be sent on the downlink (DL) for UL timing adjustments. A mobile station (MS) sends a chosen sequence to the AP to indicate that a RA data transmission is being requested. The location and number of radio resources that are used for the UL RA data transmission are determined by the choice of a RA sequence initially sent by the MS. If UL timing has not been established, the AP is able to determine the timing of the UL RA data transmissions by deriving the offset of the initial RA request sequence transmission from the MS.

Claims21

Dependent claims

A system for transmitting data over a random access (RA) data channel comprising:

a plurality of RA data channels, each RA data channel comprising:
a RA sequence associated with a corresponding RA sequence identifier;
a RA resource pattern (RP) comprising a set of uplink (UL) Hybrid Automatic Repeat reQuest (HARQ) transmission opportunities corresponding to a set of data transmission resources, each data transmission resource comprising a set of radio channel resources;
and
a mobile station (MS) configured to:
select a RA data channel from the plurality of RA data channels;
transmit the RA sequence associated with the selected RA data channel to an access point (AP);
use the data transmission resources to transmit data to the AP during corresponding HARQ transmission opportunities of the RP associated with the selected RA data channel;
and
receive a data transmission positive or negative acknowledgement from the AP.

7 more elements

Dependencies are inferred from the claim text.

Uplink random access data channel with harq

Life of this patent

Uplink random access data channel with harq

Life of this patent

Abstract

Claims21