Message processing method of gateway

• US 9,300,559 B2
• Filed: 12/12/2013
• Issued: 03/29/2016
• Est. Priority Date: 08/14/2013
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Kim, Dong Won, Kim, You Keun, Choi, Sung Ho
• Primary Examiner(s): Nguyen, Phuongchau Ba
• Application Number:
  US14/105,050
• Publication Number:
  US 20150049774A1
• Time in Patent Office: 838 Days
• Field of Search: 370/252, 370/503, 370/338, 370/350, 370/356, 370/401, 370/448, 370/516, 455/181.1, 375/356
• US Class Current: 1/1
• CPC Class Codes: H04J 3/0658 Clock or time synchronisation among packet nodes
• CPC Class Codes: H04J 3/0682 by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
• CPC Class Codes: H04L 12/40 Bus networks
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 43/0858 One way delays
• CPC Class Codes: H04L 47/11 Identifying congestion
• CPC Class Codes: H04L 47/22 Traffic shaping
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]
• CPC Class Codes: H04L 7/0041 Delay of data signal

Abstract

The present invention provides a message processing method of a gateway, which can improve the reliability of a routing operation of the gateway by changing the moment of message transmission. The message processing method of the gateway includes steps of (a) calculating a time difference between the transmission time of a message transmitted to the gateway and the transmission time of a message routed and transmitted from the gateway, and (b) comparing the transmission period of the message transmitted to the gateway and the transmission period of the message routed and transmitted from the gateway, when the time difference is less than a target value. (c) A message transmission timing offset is calculated according to the compared result between the transmission periods of the messages, and (d) the transmission time of the message transmitted to the gateway is changed and corrected using the message transmission timing offset.

Claims

1. A message processing method of a gateway, comprising the steps of:

(a) calculating a time difference between a transmission time of a message transmitted to the gateway and a transmission time of a message routed and transmitted from the gateway;

(b) comparing a transmission period of the message transmitted to the gateway and a transmission period of the message routed and transmitted from the gateway, when the time difference is less than a target value;

(c) calculating a message transmission timing offset at which a maximum latency margin can be ensured according to the compared result between the transmission periods of the messages; and

(d) changing and correcting the transmission time of the message transmitted to the gateway using the message transmission timing offset,

wherein, after the correction in step (d) is completed with respect to all messages transmitted to the gateway, step (d) includes deciding whether the message posterior to the routing maintains a previous data by comparing the messages prior and posterior to the routing, and calculating a message transmission timing offset when the message posterior to the routing maintain the previous data and changing the transmission time of the message to the gateway, using the calculated offset.

2. The message processing method of claim 1, wherein in step (c), when the transmission period of a message (Tx) prior to the routing is equal to the transmission period of a message (Rx) posterior to the routing, the message transmission timing offset (Tx_offset) is calculated according to Tx_Offset=P_Rx/2−

Δ

t,

wherein Δ

t=t_Rx−

t_Tx, t_Rx is the transmission time of the message (Rx) posterior to the routing, t_Tx is the transmission time of the message (Tx) prior to the routing, P_Tx is the transmission period of the message (Tx) prior to the routing, and P_Rx is the transmission period of the message (Rx) posterior to the routing.

3. The message processing method of claim 2, wherein Δ

t is a value smaller than 0.4·

P_Tx, wherein P_Tx, is the transmission period of the message (Tx) prior to routing.

4. The message processing method of claim 1, wherein in step (c), when the transmission period of the message (Tx) prior to the routing is greater than the transmission period of the message (Rx) posterior to the routing, the message transmission timing offset (Tx_Offset) is calculated according to Tx_Offset=P_Rx/2−

Δ

t, wherein Δ

t=t_Rx−

t_Tx, and P_Rx is the transmission period of the message (Rx) posterior to the routing.

5. The message processing method of claim 4, wherein Δ

t is a value smaller than 0.4·

P_Rx.

6. The message processing method of claim 1, wherein in step (c), when the transmission period of the message (Tx) prior to the routing is smaller than the transmission period of the message (Rx) posterior to the routing, the message transmission timing offset (Tx_Offset) is calculated according to Tx_Offset=P_Tx/2−

Δ

t, wherein Δ

t=t_Rx−

t_Tx, and P_Tx is the transmission period of the message (Tx) prior to the routing.

7. The message processing method of claim 6, wherein Δ

t is a value smaller than 0.4·

P_Tx, wherein P_Tx the transmission period of the message (Tx) prior to the routing.

8. The message processing method of claim 1, wherein the message transmission timing offset is calculated using Tx_offset=0.1*min(P_Tx, P_Rx) when a time difference between the transmission time of the message prior to the routing and the transmission time of the message posterior to the routing is no more than min(P_Tx, P_Rx)/2, wherein t_Rx is the transmission time of the message (Rx) posterior to the routing, t_Tx is the transmission time of the message (Tx) prior to the routing, P_Tx is the transmission period of the message (Tx) prior to the routing, and P_Rx is the transmission period of the message (Rx) posterior to the routing.

9. The message processing method of claim 1, wherein the message transmission timing offset is calculated using Tx_offset=0.1*min(P_Tx, P_Rx) when the time difference between the transmission time of the message prior to the routing and the transmission time of the message posterior to the routing is greater than min(P_TxP_Rx)/2, wherein P_Tx is the transmission period of the message (Tx) prior to the routing, and P_Rx is the transmission period of the message (Rx) posterior to the routing.