METHOD OF OPTIMIZING DATA FORMAT SELECTION PROCEDURE FOR UP LINK COMMUNICATION

• US 20090117912A1
• Filed: 05/31/2007
• Published: 05/07/2009
• Est. Priority Date: 05/31/2006
• Status: Active Grant

• Current Assignee: Lenovo Innovations Ltd Hong Kong (Lenovo Group Ltd.)
• Original Assignee: NEC Corporation
• Inventors: Savaglio, Frank, Delaval, Guillaume
• Granted Patent: US 8,260,308 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention relates to a method of optimizing a data format selection procedure (E-TFC) for up link communication between a terminal and a base station on a cellular communication network in which the base station transmits to the terminal a signal including at least one piece of update information of at least one predetermined parameter intervening the data format selection. The method in accordance with the present invention further includes the step of optimizing a period of time required to detect the signal transmitted from the base station.

Claims

1. A method of optimizing a data format selection procedure (E-TFC) for up link transmission between a terminal and a base station, characterized by comprising the step of:

optimizing the number of time slots to be used by the terminal to detect a command value transmitted from the base station to use the entire period of time T_limit, and executing an update,

wherein the base station transmits a signal including at least one repetition command to the terminal in a predetermined number of time slots, the command constructed to update at least one predetermined parameter intervening in the data format selection, and the terminal detects, on receiving the signal, the command value and conducts the update according to the detected value during a time window having a predetermined period of time T_limit.

2. The method in accordance with claim 1, characterized in that the transmission of the signal including the repetition command is carried out via an Enhanced Relative Grant Channel (E-RGCH channel) and the up link transmission is carried out via an Enhanced Dedicated Physical Data Channel (E-DPDCH).

3. The method in accordance with claim 1, characterized by comprising the steps of:

calculating a period of time T_rg between an end of the time slots and a start of the up link transmission;

estimating a period of time T_limit available to execute the update;

comparing the period of time T_rg with the period of time T_limit; and

reducing, if the period of time T_rg is less than the period of time T_limit, the number of time slots dedicated to the signal detection.

4. The method in accordance with claim 1, characterized in that the update parameter during the period of time T_limit is associated with at least one of:

a relative/absolute grant detection procedure;

a procedure to update a serving grant procedure;

an E-TFC limitation/selection procedure;

a data encryption procedure; and

a data turbo encoding procedure.

5. The method in accordance with 1, characterized in that the communication network between the terminal and the base station is a UMTS network.

6. A terminal characterized by comprising:

a unit that detects, on receiving a signal including a repetition command constructed to update at least one predetermined parameter intervening in a data format selection, a command value and conducting the update according to the detected value during a time window having a predetermined period of time T_limit; and

a unit that optimizes the number of time slots to be used to detect the command value and conducting the update by using the entire period of time T_limit.

7. The terminal in accordance with claim 6, characterized by comprising:

a unit that calculates a period of time T_rg between an end of the time slots and a start of the up link transmission;

a unit that estimates a period of time T_limit available to execute the update;

a unit that compares the period of time T_rg with the period of time T_limit; and

a unit that reduces, if the period of time T_rg is less than the period of time T_limit, the number of time slots dedicated to the signal detection.

8. The terminal in accordance with claim 6, characterized by optimizing the number of time slots dedicated to the detection of the command value.

9. A method characterized by comprising the steps of:

detecting, on receiving a signal including a repetition command constructed to update at least one predetermined parameter intervening in a data format selection, a command value and conducting the update according to the detected value during a time window having a predetermined period of time T_limit; and

optimizing the number of time slots to be used to detect the command value and conducting the update by using the entire period of time T_limit.

10. A computer-readable medium storing a program characterized by making a computer execute:

processing which detects, on receiving a signal including a repetition command constructed to update at least one predetermined parameter intervening in a data format selection, a command value and which conducts the update according to the detected value during a time window having a predetermined period of time T_limit; and

processing which optimizes the number of time slots to be used to detect the command value and which conducts the update by using the entire period of time T_limit.

11. A terminal characterized by comprising:

means for detecting, on receiving a signal including a repetition command constructed to update at least one predetermined parameter intervening in a data format selection, a command value and conducting the update according to the detected value during a time window having a predetermined period of time T_limit; and

means for optimizing the number of time slots to be used to detect the command value and conducting the update by using the entire period of time T_limit.