DEVICE AND METHOD FOR PROCESSING HARQ DATA SELECTIVELY USING INTERNAL AND EXTERNAL MEMORIES

• US 20150113360A1
• Filed: 10/20/2014
• Published: 04/23/2015
• Est. Priority Date: 10/22/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Chae Hag Yi
• Inventors: LEE, Hae Chul, Yi, Chae Hag, Jeong, Hyeong Seok, Huh, Jun Ho
• Granted Patent: US 9,667,389 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: G06F 11/10 Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
• CPC Class Codes: H04L 1/1845 Combining techniques, e.g. code combining
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence

Abstract

A device and method for selectively using an internal memory and an external memory when processing Hybrid Automatic Repeat reQuest (HARQ) data are provided. The device includes a combiner configured to receive a first HARQ burst; an internal memory positioned within the device; and a memory selector configured to compare a size of the first HARQ burst with a predetermined threshold, to select one of the internal memory and an external memory positioned outside the device according to a comparison result, and to store the first HARQ burst in a selected memory. At least one among a size of the internal memory and the threshold is determined based on a characteristic of a first service type that has been predetermined.

Claims

1. A device for receiving and processing Hybrid Automatic Repeat reQuest (HARQ) burst data, the device comprising:

a combiner configured to receive a first HARQ burst;

an internal memory positioned within the device; and

a memory selector configured to compare a size of the first HARQ burst with a predetermined threshold to generate a first comparison result, to select one of the internal memory and an external memory positioned outside the device as a first selected memory according to the first comparison result, and to store the first HARQ burst in the first selected memory,

wherein at least one among a size of the internal memory and the threshold is determined based on a characteristic of a first service type that has been predetermined.

2. The device of claim 1, wherein the memory selector selects the internal memory when the size of the first HARQ burst does not exceed the threshold and selects the external memory when the size of the first HARQ burst exceeds the threshold.

3. The device of claim 1, further comprising a decoder configured to decode the first HARQ burst, wherein when there is no error in a decoding result, the first HARQ burst stored in one of the internal memory and the external memory is erased or flushed from the memory.

4. The device of claim 3, wherein when there is an error in a result of decoding the first HARQ burst, the combiner receives a second HARQ burst related to the first HARQ burst and generates a first composite signal by combining the second HARQ burst with the first HARQ burst read from one of the internal memory and the external memory;

and

wherein the memory selector compares a size of the first composite signal with the threshold to generate a second comparison result, selects one of the internal memory and the external memory as a second selected memory according to the second comparison result, and stores the first composite signal in the second selected memory.

5. The device of claim 1, further comprising a cache configured to be connected with the external memory and to temporarily store data that will be stored in or has been stored in the external memory.

6. The device of claim 1, wherein the characteristic of the first service type is one selected from the group consisting of an average of transmission block sizes or HARQ burst sizes, a variance thereof, and a combination of the average and the variance.

7. The device of claim 1, wherein the first service type comprises at least one among a Voice over Long Term Evolution (VoLTE) service, a messenger service, a Social Network Service (SNS), a web browsing service, an on-line game service, and a low speed streaming service.

8. A method of receiving and processing Hybrid Automatic Repeat reQuest (HARQ) burst data, the method comprising:

receiving a first HARQ burst;

comparing a size of the first HARQ burst with a predetermined threshold to generate a first comparison result;

selecting one of an internal memory positioned within a HARQ processor and an external memory positioned outside the HARQ processor as a first selected memory according to the first comparison result; and

storing the first HARQ burst in the first selected memory,

wherein at least one among a size of the internal memory and the threshold is determined based on a characteristic of a first service type that has been predetermined.

9. The method of claim 8, wherein selecting one of the internal memory and the external memory comprises selecting the internal memory when the size of the first HARQ burst does not exceed the threshold and selecting the external memory when the size of the first HARQ burst exceeds the threshold.

10. The method of claim 8, further comprising:

decoding the first HARQ burst; and

erasing or flushing the first HARQ burst stored in the first selected memory when there is no error in a decoding result.

11. The method of claim 10, further comprising:

informing a HARQ burst transmitter of occurrence of an error when there is an error in the decoding result;

receiving a second HARQ burst related to the first HARQ burst from the HARQ burst transmitter;

generating a first composite signal by combining the second HARQ burst with the first HARQ burst read from one of the internal memory and the external memory; and

comparing a size of the first composite signal with the threshold to generate a second comparison result, selecting one of the internal memory and the external memory as a second selected memory according to the second comparison result, and storing the first composite signal in the second selected memory.

12. The method of claim 8, wherein the characteristic of the first service type is one selected from the group consisting of an average of transmission block sizes or HARQ burst sizes, a variance thereof, and a combination of the average and the variance.

13. The method of claim 8, wherein the first service type comprises at least one among a Voice over Long Term Evolution (VoLTE) service, a messenger service, a Social Network Service (SNS), a web browsing service, an on-line game service, and a low speed streaming service.

14. A device for receiving and processing Hybrid Automatic Repeat reQuest (HARQ) burst data, the device comprising:

a combiner configured to receive a first HARQ burst;

an internal memory positioned within the device; and

a memory selector configured to select one of the internal memory and an external memory positioned outside the device according to a service type of the first HARQ burst and to store the first HARQ burst in a selected memory,

wherein the service type comprises a first service type and a second service type.

15. The device of claim 14, wherein the memory selector selects the internal memory when the first HARQ burst is the first service type and when the internal memory has available space, and

wherein the memory selector selects the external memory when the first HARQ burst is the second service type or when the internal memory has no available space.

16. The device of claim 14, wherein the service type is determined by a service type signal externally input to the device.

17. The device of claim 14, wherein the service type is determined by a characteristic of a transmission block size or HARQ burst size.

18. A wireless communication device comprising:

a demodulator configured to demodulate a received signal and generate a demodulated signal;

a log likelihood ratio (LLR) demapper configured to remap the demodulated signal to an LLR signal of N bits, where N is a real number of at least 1;

a Hybrid Automatic Repeat reQuest (HARQ) processing unit configured to receive the LLR signal, to determine whether the LLR signal is a new signal or a retransmitted signal, and to generate a composite signal by combining the LLR signal with a related signal that has been received and previously stored in memory when the LLR signal is the retransmitted signal; and

a decoder configured to decode an output signal of the HARQ processing unit,

wherein the HARQ processing unit selects one of a first memory and a second memory according to a service type of the LLR signal and stores the LLR signal in a selected memory.

19. The wireless communication device of claim 18, wherein the first memory is an internal memory positioned within the HARQ processing unit and the second memory is an external memory positioned outside the HARQ processing unit.

20. The wireless communication device of claim 19, wherein the HARQ processing unit selects the first memory when the LLR signal is a first service type and when the first memory has available space and the HARQ processing unit selects the second memory when the LLR signal is not the first service type or when the first memory has no available space.

21. The wireless communication device of claim 19, wherein the service type is determined based on a transmission block size or a HARQ burst size.

22. The wireless communication device of claim 19, wherein the demodulated signal is an M-ary Quadrature Amplitude Modulation (M-QAM) signal, where M is a real number of at least 2.