IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
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| 국제특허분류(IPC7판) |
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| 출원번호 |
US-0507804
(2000-02-22)
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| 우선권정보 |
FI-0000384 (1999-02-23) |
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발명자
/ 주소 |
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| 출원인 / 주소 |
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| 대리인 / 주소 |
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| 인용정보 |
피인용 횟수 :
42 인용 특허 :
4 |
초록
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A method and an arrangement for managing packet data transfer in a cellular system such as the Universal Mobile Telecommunications System, UMTS. The decision about the channel used for the transfer of packet data is made based on a channel selection parameter and values of the parameters needed in t
A method and an arrangement for managing packet data transfer in a cellular system such as the Universal Mobile Telecommunications System, UMTS. The decision about the channel used for the transfer of packet data is made based on a channel selection parameter and values of the parameters needed in the decision-making are sent to the mobile station. The parameters are advantageously sent on a common channel such as the BCH or FACH. Parameters sent advantageously include the maximum packet size on the RACH, current RACH load, a threshold value for amount of data in RLC buffers, etc. The parameters may concern all mobile stations, a subset of the mobile stations or one mobile station in the area in which the parameters are sent. The invention minimizes the transfer capacity load associated with signaling and the transfer of packet data can be performed with minimal delays caused by signaling.
대표청구항
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1. A method for transferring packet data in the uplink direction from a mobile station to a system in such a manner that:a common channel (RACH) or a dedicated channel (DCH) is selected for the sending of a data packet, andthe data packet is sent using the channel selected, characterized in thata th
1. A method for transferring packet data in the uplink direction from a mobile station to a system in such a manner that:a common channel (RACH) or a dedicated channel (DCH) is selected for the sending of a data packet, andthe data packet is sent using the channel selected, characterized in thata threshold value of a channel selection parameter is defined (620)said threshold value of the channel selection parameter is sent to the mobile station (630),a current value of the channel selection parameter is compared to said threshold value of the channel selection parameter by the mobile station (650), andsaid selection is performed on the basis of said comparison (660).2. A method according to claim 1, characterized in that said current value corresponding to the channel selection parameter is calculated at the mobile station on the basis of the parameters of the data packet to be transferred.3. A method according to claim 1, characterized in that if the channel selected for the data packet transfer is a dedicated channel (DCH), a channel (DCH) is allocated after the selection, whereafter the data packet is transferred on the allocated channel (DCH).4. A method according to claim 1, characterized in that said channel selection parameter value is sent on a common channel.5. A method according to claim 4, characterized in that the channel selection parameter value is sent on one of the following common channels: BCH, FACH, PCH.6. A method according to claim 1, characterized in that said channel selection parameter value is sent on a DCH.7. A method according to claim 1, characterized in that one or more of the following parameters are used in the channel selection:size of data packet,maximum allowed data packet size on the RACH,bit rate required,allowed transfer delay,priority of data to be transferred,load on the transfer channel, andtransmit power level required on the RACH.8. A method according to claim 7, characterized in that the size of data packet is determined on the basis of amount of data in RLC buffers.9. A method according to claim 1, characterized in that the channel selection parameter value sent to the mobile station is one or several of the following:maximum allowed data packet size on the RACH,load on the transfer channel, andmaximum allowed power level on the RACH.10. A method according to claim 8, characterized in that the channel selection parameter value sent to the mobile station is a threshold value for the data in the RLC buffer(s).11. A method according to claim 1, characterized in that the channel selection parameters are defined so as to concern all mobile stations in the area in which the parameters are sent.12. A method according to claim 1, characterized in that the channel selection parameters are defined so as to concern a subset of all mobile stations in the area in which the parameters are sent.13. A method according to claim 1, characterized in that the channel selection parameters are defined so as to concern a single mobile station.14. The use of the method of claim 1 in a UMTS system.15. A cellular system comprising:means for sending packet data in the uplink direction from a mobile station to the system using a selected channel,means for selecting a common channel (RACH) or a dedicated channel (DCH) for the sending of a data packet,characterized in that it also comprises:means for defining a threshold value of a channel selection parameter,means for sending said threshold value of the channel selection parameter from the system to the mobile station in order to compare said threshold value of the channel selection parameter to a current value of the channel selection parameter, andmeans for making said channel selection on the basis of said comparison.16. A cellular system of claim 15 characterized in that it is a UMTS system.17. A mobile station connected with a cellular system, comprising means for sending uplink packet data to the system using a selected channel, wherein the selected channel is either a common channel (RACH) or a dedicated channel (DCH), characterized in that it also comprises:means for receiving a threshold value of a channel selection parameter from the system,means for storing said threshold value of the channel selection parameter, andmeans for comparing said threshold value of the channel selection parameter to a current value of the channel selection parameter for basis of said channel selection.18. A mobile station according to claim 17, characterized in that it further comprises:means for making said channel selection on the basis of the result of said comparison.19. A mobile station according to claim 17 characterized in that it comprises:means for calculating a value corresponding to the channel selection parameter on the basis of the parameters of the data packet to be sent,means for comparing a current value of the last channel selection parameter sent to the mobile station to said calculated value of the channel selection parameter, andmeans for making said channel selection on the basis of said comparison.20. A mobile station according to claim 19, characterized in that said value corresponding to the channel selection parameter is the amount of data in the RLC buffer(s), said last current value of the last channel selection parameter is a threshold value for the amount of data in the RLC buffer(s).21. The use of the mobile station of claim 17 in a UMTS system.
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