Method for Scheduling in Mobile Communication and Apparatus Thereof

Abstract

The present invention relates to a scheduling device and method of a mobile communication system. In the packet scheduling method, a base station performs packet scheduling for a terminal station in a mobile communication system, and a transport channel comprising an uplink shared channel (UL-SCH) and a physical channel comprising an uplink grant channel (UL-GCH) between the terminal and the base station are classified into a plurality of channels. In addition, in the packet scheduling method: a) the base station receives scheduling information from the terminal; b) the base station allocates an uplink resource for uplink traffic transmission for terminal based on the received scheduling information; and c) information for the allocated uplink resource is transmitted to the terminal through the UL-GCH of the physical channel.

1 . A packet scheduling method for performing packet scheduling for a terminal by a base station in a mobile communication system, wherein a transport channel comprising an uplink shared channel (UL-SCH) and a physical channel comprising an uplink grant channel (UL-GCH) between the terminal and the base station are classified into a plurality of channels, the packet scheduling method comprising:
 a) receiving scheduling information from the terminal, by the base station;   b) allocating an uplink resource for uplink traffic transmission for a terminal based on the received scheduling information, by the base station; and   c) transmitting information on the allocated uplink resource to the terminal through the UL-GCH of the physical channel.   
   
   
       2 . The packet scheduling method of  claim 1 , wherein the information transmitted through the UL-GCH comprises at least one among a terminal identifier, a modulation scheme method for restoring data, and resource allocation information for resource spaces. 
   
   
       3 . The packet scheduling method of  claim 1 , wherein the transport channel further comprises a random access channel (RACH), the physical channel further comprises an uplink scheduling information channel (UL-SICH), and a) comprises at least one among:
 receiving the scheduling information from the terminal through the UL-SCH, by the base station;   receiving the scheduling information from the terminal through the UL-SICH, by the base station; and   receiving the scheduling information from the terminal through the RACH, by the base station.   
   
   
       4 . The packet scheduling method of  claim 3 , wherein, when receiving the scheduling information through the UL-SCH, the base station receives a data transmission packet data unit (PDU) or a state PDU through the UL-SCH, and obtains the scheduling information from the data transmission PDU or the state PDU to use. 
   
   
       5 . The packet scheduling method of  claim 1 , wherein the physical channel further comprises a downlink feedback channel (DL-FCH), further comprising:
 receiving data from the terminal through the uplink resource allocated through the UL-SCH, by the base station;   performing an error check for the data, by the base station; and   transmitting a result of the error check to the terminal through the DL-FCH.   
   
   
       6 . A packet scheduling method for performing a packet scheduling operation for a terminal by a base station in a mobile communication system, wherein a transport channel and a physical channel between the terminal and the base station are respectively classified into a plurality of channels, the packet scheduling method comprising:
 a) receiving scheduling information from the terminal, by the base station;   b) allocating an uplink resource for uplink traffic transmission for the terminal based on the received scheduling information, by the base station;   c) transmitting information on the allocated uplink resource to the terminal through an uplink grant channel (UL-GCH) that is one of the physical channels;   d) receiving decoding information from the terminal through an uplink hybrid automatic repeat request (UL-HARQ) channel that is one of the physical channels, by the base station;   e) receiving packet data from the terminal through a downlink shared channel (DL-SCH) that is one of the transport channels, and decoding the packet data based on the decoding information, by the base station; and   f) transmitting an error check result for the packet data to the terminal through a downlink feedback channel (DL-FCH) that is one of the physical channels, by the base station.   
   
   
       7 . The packet scheduling method of  claim 6 , wherein a) comprises at least one among:
 receiving the scheduling information included in a data transmission packet data unit (PDU) or a state PDU from the terminal through an uplink shared channel (UL-SCH), by the base station;   receiving the scheduling information from the terminal through an uplink scheduling information channel (UL-SICH) that is one of the physical channels, by the base station; and   receiving the scheduling information from the terminal through a random access channel (RACH), by the base station.   
   
   
       8 . The packet scheduling method of  claim 3 , wherein the information transmitted through the UL-SICH comprises at least one among buffer occupancy (BO) information comprising information of data waiting in a buffer, a head-of-line (HOL) delay time, and a buffer empty indicator indicating that the buffer is empty. 
   
   
       9 . The packet scheduling method of  claim 5 , wherein the information transmitted through the DL-FCH is an acknowledgement (ACK) response signal indicating that data are successfully received, or a negative acknowledgement (NACK) response signal indicating that an error for the data has occurred. 
   
   
       10 . The packet scheduling method of  claim 1 , wherein the transport channel further comprises a downlink shared channel (DL-SCH) and the physical channel further comprises a downlink grant channel (DL-GCH) and an uplink feedback channel (UL-FCH), and the packet scheduling method further comprises:
 storing a packet to be transmitted to the terminals in a buffer, by the base station;   establishing the terminal for transmitting the packet, and establishing the buffer storing the packet to be transmitted to the terminal;   allocating a downlink resource for transmitting the packet to the established terminal, and transmitting information relating to the downlink resource allocation to the terminal through the DL-GCH; and   multiplexing the packet to be transmitted, and transmitting the multiplexed packet to the established terminal through the DL-SCH.   
   
   
       11 . The packet scheduling method of  claim 10 , wherein the information transmitted through the DL-GCH comprises at least one among a terminal identifier, hybrid automatic repeat request (HARQ) process information, modulation scheme information, resource allocation information, a redundancy and constellation version, and a new data indicator. 
   
   
       12 . The packet scheduling method of  claim 10 , further comprising:
 receiving at least one among information indicating an error check result for the packet transmission and channel quality information for the packet transmission.   
   
   
       13 . The packet scheduling method of  claim 3 , when the terminal receives resource allocation information for the scheduling information transmission through the UL-GCH, and an allocated uplink resource is the UL-SCH, further comprising at least one among:
 processing the scheduling information as an information element (IE), adding the scheduling information to the state PDU without data transmission, and transmitting the scheduling information to the base station, by the terminal;   processing the scheduling information as the IE, adding the scheduling information to the data transmission PDU, and transmitting the scheduling information to the base station, by the terminal; and   processing the scheduling information as the IE, concatenating the scheduling information to the data transmission PDU, and transmitting the scheduling information to the base station, by the terminal.   
   
   
       14 . The packet scheduling method of  claim 3 , when the terminal receives resource allocation information for the scheduling information transmission through the UL-GCH, and an allocated uplink resource is the UL-SICH, further comprising
 processing the scheduling information as the IE, and transmitting the scheduling information to the base station through the UL-SICH.   
   
   
       15 . A packet scheduling device for performing scheduling for a session between a base station and a terminal in a mobile communication system, wherein transport and physical channels between the terminal and the base station are respectively classified into a plurality of channels, the packet scheduling device comprising:
 an uplink scheduler for allocating an uplink resource for uplink traffic transmission for the terminal based on scheduling information from the terminal, and transmitting allocated resource information to the terminal through an uplink grant channel (UL-GCH) that is one of the physical channels; and   an uplink hybrid automatic repeat request unit for receiving packet data from the terminal through a downlink shared channel (DL-SCH) that is one of the transport channels, and transmitting a result of an error check for the received packet data to the terminal through a downlink feedback channel (DL-FCH) that is one of the physical channels.   
   
   
       16 . The packet scheduling device of  claim 15 , further comprising
 a demultiplexer for obtaining the scheduling information from the packet data provided from the uplink hybrid automatic repeat request unit, and providing the scheduling information to the uplink scheduler.   
   
   
       17 . The packet scheduling device of  claim 15 , wherein the uplink scheduler receives the scheduling information from the terminal through one among an uplink scheduling information channel (UL-SICH) that is one of the physical channels and a random access channel (RACH) that is one of the transport channels. 
   
   
       18 . The packet scheduling device of  claim 15 , wherein the uplink hybrid automatic repeat request unit decodes the packet data received through an uplink shared channel (UL-SCH) based on decoding information received through an uplink hybrid automatic repeat request control channel (UL-HCCH). 
   
   
       19 . The packet scheduling device of  claim 15 , further comprising:
 a downlink scheduler for allocating a downlink resource for transmitting the packet data to the terminal, and transmitting allocated downlink resource information to the terminal through a downlink grant channel (DL-GCH) that is one of the physical channels; and   a downlink hybrid automatic repeat request unit for transmitting the packet data to the terminal through a downlink shared channel (DL-SCH) that is one of the transport channels.