Resource block candidate selection technique employing packet scheduling in wireless communication systems

• US 8,644,226 B2
• Filed: 01/25/2007
• Issued: 02/04/2014
• Est. Priority Date: 02/24/2006
• Status: Active Grant

• Current Assignee: Sun Patent Trust
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Wengerter, Christian, Lhr, Joachim
• Primary Examiner(s): Beharry, Noel
• Assistant Examiner(s): Acolatse, Kodzovi
• Application Number:
  US12/162,589
• Publication Number:
  US 20090219870A1
• Time in Patent Office: 2,567 Days
• Field of Search: 370/348, 370/322, 370/329, 370/335, 370/336, 370/341, 370/343
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/16 in which the return channel carries supervisory signals, e.g. repetition request signals
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method of transmitting data packets over a plurality of dynamically allocated resource blocks in at least one or a combination of a time, code or frequency domain on a shared channel of a wireless communication system, comprising the steps of selecting a number of resource block candidates for potential transmission of data packets destined for a receiver and transmitting the data packet to the receiver using at least one allocated resource block from the selected resource block candidates. The invention also relates to a corresponding method of decoding data packets, a transmitter, receiver and communication system.

Claims

1. A method of transmitting data packets over a plurality of dynamically allocated resource units, the unit being a minimum unit for data allocation, in at least one or a combination of a time, code or frequency domain on a shared channel of a wireless communication system, comprising the steps of:

selecting, from the plurality of dynamically allocated resource units, a number of resource unit candidates to be potentially used for transmission of at least part of the data packets destined for a receiver;

transmitting to the receiver information related to the selected resource unit candidates, on which the receiver is to attempt to decode dedicated control information (DCI) destined for the receiver, said information being for use by the receiver for said decoding; and

transmitting the at least part of the data packets and the DCI destined for the receiver to the receiver using only a subset of the selected resource unit candidates, the DCI including modulation and coding information of the data packets and the DCI carrying an identifier of the receiver, wherein the receiver attempts to decode all of the selected resource unit candidates to successfully decode, using the identifier of the receiver, the DCI destined for the receiver and transmitted on said subset,

wherein the step of transmitting the at least part of the data packets and the DCI includes mapping the DCI at a beginning first part of said subset of the selected resource unit candidates and mapping the at least part of the data packets containing user data at a second part of said subset.

2. The method according to claim 1, wherein at least one of the transmitting steps is an initial or retransmission step in an automatic repeat request protocol.

3. The method according to claim 1, wherein the step of selecting resource unit candidates is based on a feedback signal from the receiver.

4. The method according to claim 1, wherein the step of selecting resource unit candidates is based on a previous transmission.

5. The method according to claim 1, wherein the step of selecting resource unit candidates is based on a pre-configuration determined by the network of the communication system.

6. The method according to claim 1, wherein the step of selecting resource unit candidates is performed in a distributed or localized manner on subcarriers of a frequency band that the receiver can receive.

7. The method according to claim 1, further comprising the step of adapting the transmission power or size of the DCI over a plurality of transmissions.

8. The method according to claim 1, wherein the step of selecting resource unit candidates is performed such that the selected resource unit candidates occupy the same time frame and different frequency subcarriers or different codes.

9. The method according to claim 1, wherein the selecting step involves selecting the resource unit candidates such that the selected resource unit candidates are differently assigned to each user.

10. The method according to claim 1, wherein the transmitting steps comprise mapping a data packet on a single or multiple resource units.

11. A method of decoding data packets received, by a receiver, over a plurality of dynamically allocated resource units, the unit being a minimum unit for data allocation, in at least one or a combination of a time, code or frequency domain on a shared channel of a wireless communication system, the method comprising the steps of:

receiving information related to resource unit candidates, which are selected by a transmitter and on which the receiver is to attempt to decode dedicated control information (DCI) destined for the receiver, said information being for use by the receiver for said decoding;

receiving the at least part of the data packets and the DCI destined for the receiver from the transmitter using only a subset of the selected resource unit candidates, the DCI including modulation and coding information of the data packets and the DCI carrying an identifier of the receiver; and

attempting to decode all of the selected resource unit candidates to successfully decode, using the identifier of the receiver, the DCI destined for the receiver and transmitted on said subset to detect the at least part of the data packets,

wherein the step of receiving the at least part of the data packets and the DCI includes receiving the DCI that is mapped at a beginning first part of said subset of the selected resource unit candidates and receiving the at least part of the data packets containing user data mapped at a second part of said subset.

12. The method according to claim 11, wherein the decoding step is carried out in a parallel or serial manner with a priority scheme.

13. The method according to one of claim 11, further comprising the step of signaling a feedback message containing information on the resource unit candidates.

14. A transmitter for transmitting data packets over a shared channel of a wireless communication system, the transmitter comprising one or more processors configured to embody sections including:

a resource allocation section configured to perform dynamic resource allocation using a plurality of resource units, the unit being a minimum unit for data allocation, in at least one or a combination of a time, code or frequency domain;

a selection section configured to select, from the plurality of resource units, a number of resource unit candidates to be potentially used for transmission of at least part of the data packets destined for a receiver; and

a transmitting section configured to transmit to the receiver;

(i) information related to the selected resource unit candidates, on which the receiver is to attempt to decode dedicated control information (DCI) destined for the receiver, said information being for use by the receiver for said decoding, and (ii) the at least part of the data packets and the DCI destined for the receiver using only a subset of the selected resource unit candidates, the DCI including modulation and coding information of the data packets and the DCI carrying an identifier of the receiver, wherein the receiver attempts to decode all of the selected resource unit candidates to successfully decode, using the identifier of the receiver, the DCI destined for the receiver and transmitted on said subset,

wherein the transmitting section configured to transmit the at least part of the data packets and the DCI is further configured to map the DCI at a beginning first part of said subset of the selected resource unit candidates and to map the at least part of the data packets containing user data at a second part of said subset.

15. The transmitter according to claim 14, the sections embodied by the one or more processors further including a feedback evaluation section configured to receive feedback from the receiver containing information on the resource unit candidates.

16. A receiver for receiving data packets over a plurality of dynamically allocated resource units, the unit being a minimum unit for data allocation, in at least one or a combination of a time, code or frequency domain over a shared channel of a wireless communication system, the receiver comprising one or more processors configured to embody sections including:

an information obtaining section configured to obtain information related to resource unit candidates, which are selected by a transmitter and on which the receiver is to attempt to decode dedicated control information (DCI) destined for the receiver, said information being for use by the receiver for said decoding;

a receiving section configured to receive the at least part of the data packets and the DCI destined for the receiver from the transmitter using only a subset of the selected resource unit candidates, the DCI including modulation and coding information of the data packets and the DCI carrying an identifier of the receiver; and

a decoder configured to attempt to decode all of the selected resource unit candidates to successfully decode, using the identifier of the receiver, the DCI destined for the receiver and transmitted on said subset to detect the at least part of the data packets,

wherein the receiving section receives the DCI that is mapped at a beginning first part of said subset of the selected resource unit candidates and receives the at least part of the data packets containing user data mapped at a second part of said subset.

17. The receiver according to claim 16, the sections embodied by the one or more processors further including a feedback signal generating section configured to generate a feedback signal comprising information on the resource unit candidates.