APPARATUS AND METHOD FOR INDICATING UPLINK RESOURCE ALLOCATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM

• US 20110280202A1
• Filed: 05/17/2011
• Published: 11/17/2011
• Est. Priority Date: 05/17/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Mi-Hyun, Yu, Hyun-Kyu
• Granted Patent: US 9,432,980 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

An apparatus and a method for indicating uplink resource allocation in a broadband wireless communication system are provided. The method includes decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe, extracting an indicator field value from the decoded UL resource allocation IE, the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location, and transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value.

Claims

1. An operating method of a terminal for transmitting data according to resource allocation in a wireless communication system, the method comprising:

decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe;

extracting an indicator field value from the decoded UL resource allocation IE,

the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location; and

transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value.

2. The method of claim 1, wherein the wireless communication system is a system where a plurality of UL subframes corresponds to one DL subframe.

3. The method of claim 1, further comprising:

receiving the DL subframe;

determining an index of the received DL subframe using a preamble of the received DL subframe; and

determining a number and indexes of UL subframes corresponding to the determined index of the DL subframe according to a ratio of the DL to the UL.

4. The method of claim 1, wherein the indicator field value is 2 bits in size.

5. The method of claim 4, wherein the transmitting of the UL data comprises:

when the extracted indicator field value indicates a long TTI, transmitting the UL data through the resource allocated to the terminal over a UL subframe corresponding to the received DL subframe or a long TTI region starting from a first UL subframe of the UL subframes corresponding to the received DL subframe;

when the extracted indicator field value indicates a default TTI and a corresponding first UL subframe, transmitting the UL data through the resource allocated to the terminal over a first UL subframe of the UL subframes corresponding to the received DL subframe;

when the extracted indicator field value indicates a default TTI and a corresponding second UL subframe, transmitting the UL data through the resource allocated to the terminal over a second UL subframe of the UL subframes corresponding to the received DL subframe; and

when the extracted indicator field value indicates a default TTI and a corresponding third UL subframe, transmitting the UL data through the resource allocated to the terminal over a third UL subframe of the UL subframes corresponding to the received DL subframe.

6. An operating method of a base station for allocating a resource in a wireless communication system, the method comprising:

allocating a resource to a terminal through scheduling;

determining an indicator field value which indicates a Transmission Time Interval (TTI) type for the resource allocated to the terminal and an UpLink (UL) subframe location; and

generating a UL resource allocation Information Element (IE) comprising the determined indicator field value.

7. The method of claim 6, wherein the wireless communication system is a system where a plurality of UL subframes corresponds to one DownLink (DL) subframe.

8. The method of claim 6, further comprising:

encoding the generated UL resource allocation IE;

transmitting to the terminal, a DL subframe comprising the encoded UL resource allocation IE; and

receiving UL data from the terminal over the resource allocated to the terminal.

9. The method of claim 6, wherein the indicator field value is 2 bits in size.

10. The method of claim 9, wherein the indicator field value is one of:

a long TTI when the TTI type for the resource allocated to the terminal is the long TTI and the UL subframe location for the resource allocated to the terminal is a UL subframe corresponding to the DL subframe or a long TTI region starting from a first UL subframe of the UL subframes corresponding to the DL subframe,

a default TTI and a corresponding first UL subframe when the TTI type for the resource allocated to the terminal is a default TTI and the UL subframe location for the resource allocated to the terminal is a first UL subframe of the UL subframes corresponding to the DL subframe,

a default TTI and a corresponding second UL subframe when the TTI type for the resource allocated to the terminal is the default TTI and the UL subframe location for the resource allocated to the terminal is a second UL subframe of the UL subframes corresponding to the DL subframe, and

a default TTI and a corresponding third UL subframe when the TTI type for the resource allocated to the terminal is the default TTI and the UL subframe location for the resource allocated to the terminal is a third UL subframe of the UL subframes corresponding to the DL subframe.

11. The method of claim 6, further comprising:

determining a number and indexes of UL subframes corresponding to the DL subframe, to comprise the UL resource allocation IE for the burst allocated to the terminal, according to a ratio of the DL to the UL,

wherein the indicator field value is determined based on the determined number and indexes of the UL subframes corresponding to the DL subframe.

12. An apparatus of a terminal for transmitting data according to resource allocation in a wireless communication system, the apparatus comprising:

a message analyzer for decoding an UpLink (UL) resource allocation Information Element (IE) in a received DownLink (DL) subframe and for extracting an indicator field value from the decoded UL resource allocation IE, the indicator field value indicating a Transmission Time Interval (TTI) type for a resource allocated to the terminal and a UL subframe location; and

a Radio Frequency (RF) transmitter for transmitting UL data through a resource allocated to the terminal based on the extracted indicator field value.

13. The apparatus of claim 12, wherein the wireless communication system is a system where a plurality of UL subframes corresponds to one DL subframe.

14. The apparatus of claim 12, further comprising:

an RF receiver for receiving the DL subframe,

wherein the message analyzer determines an index of the received DL subframe using a preamble of the received DL subframe, and determines number and indexes of UL subframes corresponding to the determined index of the DL subframe according to a ratio of the DL to the UL.

15. The apparatus of claim 12, wherein the indicator field value is 2 bits in size.

16. The apparatus of claim 15, wherein, when the extracted indicator field value indicates a long TTI, the RF transmitter transmits the UL data through the resource allocated to the terminal over a UL subframe corresponding to the received DL subframe or a long TTI region starting from a first UL subframe of the UL subframes corresponding to the received DL subframe,

when the extracted indicator field value indicates a default TTI and a corresponding first UL subframe, the RF transmitter transmits the UL data through the resource allocated to the terminal over a first UL subframe of the UL subframes corresponding to the received DL subframe,

when the extracted indicator field value indicates a default TTI and a corresponding second UL subframe, the RF transmitter transmits the UL data through the resource allocated to the terminal over a second UL subframe of the UL subframes corresponding to the received DL subframe, and

when the extracted indicator field value indicates a default TTI and a corresponding third UL subframe, the RF transmitter transmits the UL data through the resource allocated to the terminal over a third UL subframe of the UL subframes corresponding to the received DL subframe.

17. An apparatus of a base station for allocating a resource in a wireless communication system, the apparatus comprising:

a scheduler for allocating a resource to a terminal through scheduling; and

a message generator for determining an indicator field value which indicates a Transmission Time Interval (TTI) type for the resource allocated to the terminal and an UpLink (UL) subframe location, and for generating a UL resource allocation Information Element (IE) comprising the determined indicator field value.

18. The apparatus of claim 17, wherein the wireless communication system is a system where a plurality of UL subframes corresponds to one DL subframe.

19. The apparatus of claim 17, further comprising:

a Radio Frequency (RF) transmitter for transmitting to the terminal, a DownLink (DL) subframe comprising the generated UL resource allocation IE; and

an RF receiver for receiving UL data from the terminal over the resource allocated to the terminal.

20. The apparatus of claim 17, wherein the indicator field value is 2 bits in size.

21. The apparatus of claim 20, wherein the indicator field value is one of:

a long TTI when the TTI type for the resource allocated to the terminal is the long TTI and the UL subframe location for the resource allocated to the terminal is a UL subframe corresponding to the DL subframe or a long TTI region starting from a first UL subframe of the UL subframes corresponding to the DL subframe,

a default TTI and a corresponding first UL subframe when the TTI type for the resource allocated to the terminal is the default TTI and the UL subframe location for the resource allocated to the terminal is a first UL subframe of the UL subframes corresponding to the DL subframe,

a default TTI and a corresponding second UL subframe when the TTI type for the resource allocated to the terminal is the default TTI and the UL subframe location for the resource allocated to the terminal is a second UL subframe of the UL subframes corresponding to the DL subframe, and

a default TTI and a corresponding third UL subframe when the TTI type for the resource allocated to the terminal is the default TTI and the UL subframe location for the resource allocated to the terminal is a third UL subframe of the UL subframes corresponding to the DL subframe.

22. The apparatus of claim 17, wherein the message generator determines number and indexes of UL subframes corresponding to the DL subframe, to comprise the UL resource allocation IE for the burst allocated to the terminal, according to a ratio of the DL to the UL,

wherein the indicator field value is determined based on the determined number and indexes of the UL subframes corresponding to the DL subframe.