IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0089342
(2006-09-29)
|
등록번호 |
US-8098622
(2012-01-17)
|
우선권정보 |
KR-10-2005-0093372 (2005-10-05) |
국제출원번호 |
PCT/KR2006/003937
(2006-09-29)
|
§371/§102 date |
20080404
(20080404)
|
국제공개번호 |
WO2007/040323
(2007-04-12)
|
발명자
/ 주소 |
- Yeo, Geon-Min
- Ryu, Byung-Han
|
출원인 / 주소 |
- Electronics and Telecommunications Research Institute
|
대리인 / 주소 |
Kile Park Goekjian Reed & McManus PLLC
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
3 |
초록
▼
The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to
The present invention relates to a resource allocation requesting method and a packet scheduling method for uplink packet traffic in a mobile communication system, and an apparatus of the packet scheduling method. For efficient scheduling for the uplink traffic, scheduling is performed according to characteristics of traffic between a base station and user equipment (UE). Particularly, when the traffic generates a variable size packet on a periodic basis, the traffic is classified into first traffic that generates a completely variable size packet on a periodic basis and second traffic that generates a quasi-variable size packet on a periodic basis. In addition, the UE requests resource allocation in a different form from the base station depending on the type of traffic, and the base station performs scheduling according to the resource allocation request. Therefore, the UE requests resource allocation in accordance with traffic characteristics and the base station performs scheduling according to the traffic characteristics so that optimal uplink scheduling can be performed.
대표청구항
▼
1. A resource allocation request method for user equipment (UE) to request resource allocation from a base station for uplink traffic transmission in a mobile communication system, the resource allocation request method comprising: a) checking a mode setting condition, by the UE; wherein the checkin
1. A resource allocation request method for user equipment (UE) to request resource allocation from a base station for uplink traffic transmission in a mobile communication system, the resource allocation request method comprising: a) checking a mode setting condition, by the UE; wherein the checking a mode setting condition comprises: a-1) checking whether a real-time transport control protocol (RTCP) packet is generated;a-2) checking whether adjustment of resource allocation time that has been negotiated with the base station is requested; anda-3) checking whether uplink packet transmission has failed;b) selecting an operation mode among a limited mode and a normal mode according to the checking result; wherein setting the operation mode comprises: b-1) setting the operation mode to the normal mode when the checking of any one of a-1) indicates a RTCP packet is generated, the checking of a-2) indicates adjustment of the resource allocation time is requested, and the checking of a-3) indicates uplink packet transmission failed;b-2) otherwise, setting the operation mode to the limited mode.c) when the normal mode is selected, generating scheduling information that indicates a state of a transmit buffer in which a packet to be transmitted by the UE is queued, by the UE;d) when the limited mode is selected, generating scheduling information that indicates a packet queued in the transmit buffer, by the UE; ande) requesting resource allocation from a base station while transmitting the scheduling information to the base station, by the UE. 2. The resource allocation request method of claim 1, wherein, a-3) comprises, when the UE is not allocated with a resource from the base station or when the base station allocates a resource and the UE is not able to decode resource allocation information, performing no uplink packet transmission. 3. The resource allocation request method of claim 1, wherein d) comprises, when the operation mode is set to the normal mode, generating scheduling information including at least one of the amount of packet data queued in the transmit buffer, the amount of packet data that can be added, and a resource allocation time adjustment request value. 4. The resource allocation request method of claim 1, wherein d) comprises, when the operation mode is set to the limited mode, generating scheduling information including a frame type indicator (FTI) for indicating a packet queued in the transmit buffer. 5. The resource allocation request method of claim 1, wherein e) comprises transmitting a mode identifier for identifying the set mode to the base station, together with the scheduling information. 6. The resource allocation request method of claim 1, wherein e) comprises transmitting the packet queued in the transmit buffer to the base station, together with the scheduling information. 7. The resource allocation request method of claim 1, wherein the uplink traffic generates a packet with a size that varies among a plurality of predetermined fixed sizes with a periodic time interval. 8. A resource allocation request method for user equipment (UE) to request resource allocation from a base station for uplink traffic transmission in a mobile communication system, the resource allocation request method comprising: a) generating, in the user equipment, first buffer state information that indicates a state of a transmit buffer in which a packet to be transmitted is queued, by the UE;b) generating, in the user equipment, second buffer state information that indicates a state of a transmit buffer in which a real-time transport control protocol (RTCP) packet to be transmitted is queued, by the UE;c) when adjustment of a resource allocation time that has been negotiated with the base station is required, generating a resource allocation time adjustment request value;d) generating, in the user equipment, scheduling information selectively including one of the first and second buffer state information and the resource allocation time adjustment request value; ande) requesting resource allocation from the base station while transmitting the scheduling information to the base station, together with the packet queued in the transmit buffer, wherein transmitting, from the UE, the scheduling information to the base station comprises: transmitting scheduling information according to one of first to fifth resource request methods including: e-1) the first resource request method for including the scheduling information in a status packet data unit (PDU) and transmitting the PDU to the base station;e-2) the second resource request method for including the scheduling information in a PDU header and transmitting the PDU to the base station;e-3) the third resource request method for consecutively appending the scheduling information to a PDU and transmitting the scheduling information and the PDU to the base station;e-4) the fourth resource request method for transmitting the scheduling information to the base station by random access; ande-5) the fifth resource request method for transmitting the scheduling information to the base station through a physical channel. 9. The resource allocation request method of claim 8, wherein the uplink traffic is periodic-interval variable-size (PV) traffic. 10. A packet scheduling method for uplink traffic transmission from user equipment (UE) to a base station in a mobile communication system, the packet scheduling method comprising: a) receiving a packet frame together with scheduling information from the UE, by the base station, the size of the packet frame varying with a periodic time interval;b) analyzing, in the base station, the scheduling information to determine whether the scheduling information includes a state of a transmit buffer of the UE in which a real-time transport control protocol (RTCP) packet is queued;c) if the scheduling information is determined to include the state of a transmit buffer in which RCTP packets are queued, updating scheduling information for a session with the UE according to the scheduling information and the state of the transmit buffer and allocating a variable size resource for the session with the UE based on the updated scheduling information, wherein c) comprises: c-1) determining a mode selected by the UE based on the scheduling information;c-2) when a normal mode is selected, acquiring resource allocation time adjustment information or information on a packet queued in a transmit buffer of the UE from the scheduling information transmitted from the UE;c-3) when a limited mode is selected, acquiring information on the packet queued in the transmit buffer from the scheduling information transmitted from the UE; andc-4) updating scheduling information for the session with the UE according to the acquired information; andd) if the scheduling information is determined not to include the state of a transmit buffer in which RCTP packets are queued, waiting until a predetermined time interval has passed before periodically updating scheduling information for a session with the UE according to the scheduling information and allocating a variable size resource for the session with the UE based on the updated scheduling information. 11. The packet scheduling method of claim 10, wherein d) comprises performing resource allocation per packet unit when the limited mode is selected. 12. The packet scheduling method of claim 10, the packet scheduling method comprising performing the scheduling for traffic that generates a packet having a size that periodically varies within a plurality of predetermined fixed sizes. 13. The packet scheduling method of claim 10, further comprising adjusting a resource allocation time negotiated with the UE, based on the updated scheduling information when the scheduling information includes the resource allocation time adjustment information, and wherein d) comprises performing resource allocation for the session with the UE based on the updated scheduling information at the adjusted resource allocation time.
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