Terminal-aided backhaul compression

• US 10,560,868 B2
• Filed: 08/21/2014
• Issued: 02/11/2020
• Est. Priority Date: 08/21/2014
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Khayrallah, Ali S.
• Primary Examiner(s): Aung, Sai
• Application Number:
  US14/465,374
• Publication Number:
  US 20160135082A1
• Time in Patent Office: 2,000 Days
• CPC Class Codes: H04L 67/5651 Reducing the amount or size of exchanged application data
• CPC Class Codes: H04L 69/04 Protocols for data compression, e.g. ROHC
• 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 4/18 Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

A delegate wireless terminal can receive and store messages sent to it by a receiving network node. The wireless terminal can identify a message label based on a mapping for the received message. A transmitting network node can transmit a message label to a receiving network node across a backhaul link. The receiving network node can transmit a message label to the wireless terminal. The wireless terminal can identify a stored message that corresponds to the received message label, and send the corresponding message to the receiving network node. The receiving network node can then transmit the message to its intended destination.

Claims

1. A method performed at a delegate wireless terminal in a wireless communication system using terminal aided backhaul compression, comprising:

receiving, at the delegate wireless terminal, a message label from a network node, wherein the message label identifies a first message stored in a memory of the delegate wireless terminal, and wherein the delegate wireless terminal is a delegate for storing messages to be communicated from a transmitting network node to a receiving network node using backhaul compression;

identifying, at the delegate wireless terminal, based on the received message label, the first message stored in the memory of the delegate wireless terminal;

transmitting, at the delegate wireless terminal, the first message to an intended destination;

receiving, at the delegate wireless terminal, a second message from the network node;

in response to the second message corresponding to the message label, comparing, at the delegate wireless terminal, the second message to the first message;

in response to the second message being different from the first message, storing the second message in the memory with the message label, and deleting the first message from the memory; and

in response to the delegate wireless terminal being disconnected from the receiving network node, erasing one or more messages and message labels stored in the memory that correspond to messages and message labels stored in the network node.

2. The method of claim 1, wherein the intended destination is another wireless terminal, and transmitting the first message to the intended destination comprises wirelessly transmitting the first message to a network node.

3. The method of claim 1, wherein the intended destination is another wireless terminal, and transmitting the first message to the intended destination comprises wirelessly transmitting the first message directly to the other wireless terminal.

4. The method of claim 1, wherein the intended destination is the delegate wireless terminal itself, and transmitting the first message to the intended destination comprises retrieving the first message from the memory.

5. The method of claim 1, further comprising:

prior to receiving the first message label from the network node;

receiving the first message from the network node;

determining a message label for the first message based on a predetermined mapping; and

storing the first message in the memory with the determined message label.

6. The method of claim 5,

wherein identifying, based on the received message label, the first message stored in the memory of the delegate wireless terminal comprises:

comparing the received message label received from the network node to the determined message label determined at the delegate wireless terminal and stored in the memory of the delegate wireless terminal; and

determining that the received message label is the same as the determined message label; and

wherein transmitting the first message to the intended destination comprises transmitting the first message stored in the memory of the delegate wireless terminal associated with the determined message label to the intended destination.

7. The method of claim 5, wherein receiving the first message from the network node comprises eavesdropping on transmissions between the network node and another wireless terminal.

8. A delegate wireless terminal in communication with a network node, comprising:

a memory;

a transceiver; and

a processor configured to execute computer instructions to;

receive a message label from the network node, wherein the message label identifies a first message stored in the memory, and wherein the delegate wireless terminal is a delegate for storing messages to be communicated from a transmitting network node to a receiving network node using backhaul compression;

identify, based on the received message label, the first message stored in the memory;

transmit the first message to an intended destination;

receive a second message from the network node;

in response to the second message corresponding to the message label, compare the second message to the first message;

in response to the second message being different from the first message, store the second message in the memory with the message label, and delete the first message from the memory; and

in response to the delegate wireless terminal being disconnected from the receiving network node, erase one or more messages and message labels stored in the memory that correspond to messages and message labels stored in the network node.

9. The delegate wireless terminal of claim 8, wherein the delegate wireless terminal is further configured to:

prior to receiving the message label from the network node;

receive the first message from the network node;

determine a message label for the first message based on a predetermined mapping;

store the first message in the memory with the determined message label.

10. The delegate wireless terminal of claim 9,

wherein identifying, based on the received message label, the first message stored in the memory of the delegate wireless terminal comprises:

comparing the received message label received from the network node to the determined message label determined at the delegate wireless terminal and stored in the memory; and

determining that the received message label is the same as the determined message label; and

wherein transmitting the first message to the intended destination comprises transmitting the first message stored in the memory associated with the determined message label to the intended destination.

11. The method of claim 9, wherein receiving the first message from the network node comprising eavesdropping on transmissions between the network node and another wireless terminal.

12. A method performed at a first network node of a wireless communications network configured for backhaul compression, the method comprising:

receiving a first message;

determining a message label for the message, wherein the message label is to identify the first message for backhaul compression;

determining that the determined message label is the same as a stored message label that is stored in a memory of the first network node;

comparing the first message to a second message stored in the memory with the stored message label, to determine whether the first message is the same as or different than the second message;

upon determining that the first message is the same as the second message, transmitting the determined message label to a second network node via a backhaul link;

upon determining that the first message is different than the second message, transmitting the first message to the second network node via the backhaul link, and storing, in the memory, the first message with the determined message label;

receiving an indication from the second network node that a first delegate wireless terminal is no longer connected to the second network node; and

erasing one or more messages and message labels stored in the memory of the first network node that correspond to messages and message labels stored in the first delegate wireless terminal.

13. The method of claim 12, further comprising:

transmitting an identification of a new delegate wireless terminal to the second network node.

14. A first network node of a wireless communications network, the network node comprising:

a memory;

a transceiver; and

a processor configured to execute computer instructions to;

receive a first message;

determine a message label for the first message, wherein the message label is to identify the message for backhaul compression;

determine that the determined message label is the same as a stored message label that is stored in the memory;

compare the first message to a second message stored in the memory with the stored message label, to determine whether the first message is the same as or different than the second message;

upon determining that the first message is the same as the second message, transmit the determined message label to a second network node via a backhaul link;

upon determining that the first message is different than the second message, transmit the received message to the second network node via the backhaul link, and store, in the memory, the first message with the determined message label;

receive an indication from the second network node that a first delegate wireless terminal is no longer connected to the second network node; and

erase one or more messages and message labels stored in the memory of the first network node that correspond to messages and message labels stored in the first delegate wireless terminal.

15. The network node of claim 14, further configured to:

transmit an identification of a new delegate wireless terminal to the second network node.