SYSTEM AND METHOD USING A RATE SPLIT SCHEME BASED ON COOPERATION BETWEEN RECEIVERS

• US 20130182689A1
• Filed: 03/04/2013
• Published: 07/18/2013
• Est. Priority Date: 12/31/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: CHOI, Hyun Ho, Viswanath, Pramod, SHIN, Chang Yong, NOH, Won Jong, SHIN, Won-Jae
• Granted Patent: US 8,971,945 B2
• Time in Patent Office: Days
• US Class Current: 370/336
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames

Abstract

Each of a first transmitter and a second transmitter uses a rate split scheme. Each of the first transmitter and the second transmitter may transmit at least four sub-messages, and different transmission powers may be allocated to the at least four sub-messages. Also, each of receivers may cooperate with each other, may share sub-messages that act as interferences, and may extract desired messages using the shared sub-messages.

Claims

1. A communication method of a receiver corresponding to a second transmitter, the method comprising:

receiving a 1−

1−

(i−

1)^th sub-message and a 2−

1−

(i−

1)^th sub-message from among the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, a 2−

1−

(i)^th sub-message, and a 3−

1−

(i−

1)^th sub-message transmitted from a first transmitter based on different transmission powers in a (i−

1)^th time slot;

receiving a 1−

2−

(i−

1)^th sub-message, a 2−

2−

(i−

1)^th sub-message, a 2−

2−

(i)^th sub-message, and a 3−

2−

(i−

1)^th sub-message transmitted from the second transmitter based on different transmission powers in the (i−

1)^th time slot;

decoding the 1−

2−

(i−

1)^th sub-message and the 2−

2−

(i−

1)^th sub-message;

eliminating the 1−

2−

(i−

1)^th sub-message and the 2−

2−

(i−

1)^th sub-message from the received sub-messages; and

providing, to a receiver corresponding to the first transmitter, the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

2−

(i)^th sub-message and the 3−

2−

(i−

1)^th sub-message.

2. The method of claim 1, further comprising:

estimating an interference channel between the first transmitter and the receiver corresponding to the second transmitter; and

reporting information associated with the interference channel to at least one of the first transmitter and the second transmitter.

3. The method of claim 1, wherein the providing performs:

adjusting a time synchronization or a phase synchronization of each of the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

2−

(i)^th sub-message, and the 3−

2−

(i−

1)^th sub-message; and

providing, as an analog signal, the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

2−

(i)^th sub-message, and the 3−

2−

(i−

1)^th sub-message, to the receiver corresponding to the first transmitter.

4. The method of claim 1, wherein:

transmission powers of the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

1−

(i)^th sub-message, and the 3−

1−

(i−

1)^th sub-message transmitted in the (i−

1)^th time slot are transmission powers A, B, C, and D [W], respectively;

A, B, C, and D denote real numbers; and

A>

B>

C>

D.

5. A communication method of a receiver corresponding to a first transmitter, the method comprising:

distinguishing a 1−

1−

(i−

1)^th sub-message, a 2−

1−

(i−

1)^th sub-message, and a 2−

2−

(i)^th sub-message from among the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

2−

(i)^th sub-message, and a 3−

2−

(i−

1)^th sub-message transmitted from a receiver corresponding to a second transmitter, in response to;

the first transmitter transmitting the 1−

1−

(i−

1)^th sub-message, the 2−

1−

(i−

1)^th sub-message, the 2−

1−

(i)^th sub-message, and a 3−

1−

(i−

1)^th sub-message; and

the second transmitter transmitting the 1−

2−

(i−

1)^th sub-message, the 2−

2−

(i−

1)^th sub-message, the 2−

2−

(i)^th sub-message, and a 3−

2−

(i−

1)^th sub-message in an (i−

1)^th time slot;

receiving a 1−

1−

(i)^th sub-message, the 2−

1−

(i)^th sub-message, a 2−

1−

(i+1)^th sub-message, and a 3−

1−

(i)^th sub-message from the first transmitter in an (i)^th time slot;

receiving a 1−

2−

(i)^th sub-message, and the 2−

2−

(i)^th sub-message from the second transmitter in the (i)^th time slot; and

extracting the 1−

1−

(i)^th sub-message, the 2−

1−

(i)^th sub-message, and the 3−

1−

(i)^th sub-message from the sub-messages received in the (i)^th time slot, using the 1−

2−

(i)^th sub-message and the 2−

2−

(i)^th sub-message received from the receiver corresponding to the second transmitter.

6. The method of claim 5, wherein the extracting performs:

extracting the 1−

1−

(i)^th sub-message and the 2−

1−

(i)^th sub-message based on a transmission power of each of the sub-messages received in the (i)^th time slot; and

eliminating the 1−

2−

(i)^th sub-message from remaining sub-messages, excluding the 1−

1−

(i)^th sub-message and the 2−

1−

(i)^th sub-message among the sub-messages received in the (i)^th time slot.

7. The method of claim 6, wherein the extracting sequentially eliminates the 2−

1−

(i+1)^th sub-message and the 1−

2−

(i)^th sub-message to extract the 3−

1−

(i)^th sub-message, after the 1−

2−

(i)^th sub-message is eliminated from the remaining sub-messages.