METHOD OF ERROR RECOVERY IN TRANSMITTING AND RECEIVING VOICE SERVICE IN PACKET BASED MOBILE COMMUNICATION SYSTEMS

• US 20160242154A1
• Filed: 02/22/2016
• Published: 08/18/2016
• Est. Priority Date: 06/20/2008
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Kyoung Seok, KIM, Jae Heung, JUNG, Soo Jung, AHN, Jae Young
• Granted Patent: US 10,009,884 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Provided is a method of transmitting and receiving data using a persistent allocation scheme in order to effectively support a voice service between a base station and a mobile terminal in a packet based mobile communication system. When an error occurs in transmitting control information that indicates whether to use a radio resource using the persistent allocation scheme, the base station may retransmit the control information and thereby maintain a communication quality.

Claims

1. A base station for transmitting data to a terminal, the base station comprising:

a transmitter configured to transmit a first part of the data and an activation message indicating a start of a persistent scheduling transmission in a same persistent allocation interval, the activation message transmitted through a Physical Downlink Control Channel (PDCCH); and

a receiver configured to receive an acknowledgement message for the activation message from the terminal,

wherein the transmitter is further configured to transmit a second part of the data according to the persistent scheduling transmission,

wherein the transmitter is further configured to transmit a deactivation message indicating an end of the persistent scheduling transmission,

wherein the receiver is further configured to receive an acknowledgement message for the deactivation message from the terminal, and wherein the activation message is retransmitted to the terminal if a negative acknowledgement message for the activation message is received or a positive acknowledgement message for the activation message is not received from the terminal.

2. The base station of claim 1, wherein the PDCCH including the activation message is perceived by the terminal through Semi-Persistent Scheduling Cell-Radio Network Temporary Identifier (SPS C-RNTI).

3. The base station of claim 1, wherein the first part of the data and the second part of the data are transmitted through Physical Downlink Shared Channel (PDSCH).

4. The base station of claim 1, wherein the deactivation message is transmitted through Physical Downlink Control Channel (PDCCH) and the acknowledgement message for the deactivation message is received through Physical Uplink Control Channel (PUCCH).

5. A terminal to receive data from a base station, comprising:

a receiver configured to receive a first part of the data and an activation message indicating a start of a persistent scheduling transmission in a same persistent allocation interval, the activation message received through a Physical Downlink Control Channel (PDCCH); and

a transmitter configured to transmit an acknowledgement message for the activation message to the base station,

wherein the receiver is further configured to receive a second part of the data according to the persistent scheduling transmission,

wherein the receiver is further configured to receive a deactivation message indicating an end of the persistent scheduling transmission, the deactivation message received through the PDCCH, and

wherein the transmitter is further configured to transmit an acknowledgement message for the deactivation message to the base station.

6. The terminal of claim 5, wherein the terminal perceives the PDCCH including the activation message or the deactivation message using Semi-Persistent Scheduling Cell-Radio Network Temporary Identifier (SPS C-RNTI).

7. The terminal of claim 5, wherein the terminal transmits positive acknowledgement message for the activation message successfully received through PDCCH.

8. The terminal of claim 5, wherein the terminal transmits negative acknowledgement message for the deactivation message included in PDCCH if the terminal fails to decode the PDCCH.