IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0079438
(1998-05-15)
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발명자
/ 주소 |
- Gustafsson, Maria
- Olofsson, Henrik
- Ovesjo , Fredrik
- Frank, Georg
- Granzow, Wolfgang
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출원인 / 주소 |
- Telefonaktiebolaget LM Ericsson (Publ)
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인용정보 |
피인용 횟수 :
79 인용 특허 :
16 |
초록
▼
An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols tha
An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols that provide energy for channel estimation during reception of the data portion. A guard interval is preferably inserted between the preamble and data portion of the frame, which enables data detection to occur during an idle period. As such, the frame structures for both the common physical (random access) uplink channel and dedicated physical (traffic) uplink channel are compatible.
대표청구항
▼
An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols tha
An uplink common physical channel (random access channel) frame structure with a separate preamble and data portion. The preamble is used by a base station to detect that a mobile station is attempting a random access request. The data portion of the channel includes user data, and pilot symbols that provide energy for channel estimation during reception of the data portion. A guard interval is preferably inserted between the preamble and data portion of the frame, which enables data detection to occur during an idle period. As such, the frame structures for both the common physical (random access) uplink channel and dedicated physical (traffic) uplink channel are compatible. program for dynamically testing a buffering and selection device, wherein the buffering and selection device receives a transmission at an average bandwidth of T and in peak bandwidth bursts that may be greater than T, are provided. The buffering and selection device transmits data to one or more receive devices, all of which have a total average bandwidth of at least T. The buffering and selection device has buffers apportioned to each receive device in order to store data that is written in burst mode destined for that receive device. The method includes disabling the output data flow to the receive device being tested and then generating input data to the buffering and selection device tagged for each receive device in burst mode at a preselected number of transfers for each receive device. The program determines when the preselected number of transfers has occurred and then enables data flow to the receive device being tested. It is then determined if output to each receive device has commenced within a preselected latency period, and, if it has, it is determined if the preselected number of transfers of data has occurred within a preselected transfer period, i.e., meets bandwidth requirements. congestion status monitoring unit, the congestion level table being provided for each one or a plurality of the input side transfer units. 6. The packet switch of claim 1, wherein the congestion status monitoring unit is provided inside each output side transfer unit. 7. The packet switch of claim 6, wherein the congestion status monitoring unit monitors the congestion status of each prescribed transfer target for a corresponding output side transfer unit, each class of the corresponding output side transfer unit, each port of the corresponding output side transfer unit, each classes of each port of the corresponding output side transfer unit, or each flow of each class of each port of the corresponding output side transfer unit. 8. The packet switch of claim 1, wherein the congestion status monitoring unit notifies a monitored congestion status such that the monitored congestion status is reflected into the priority level attached by the priority level attaching unit. 9. The packet switch of claim 8, wherein the priority level attaching unit is provided inside each input side transfer unit, and the congestion status monitoring unit notifies a prescribed information regarding the monitored congestion status to one input side transfer unit that has transmitted one packet, at a timing of arrival of said one packet to the output side transfer unit. 10. The packet switch of claim 1, further comprising: a scheduling unit provided for each input side transfer unit and configured to control an order of transfers of a plurality of packets that are waiting for transfers to the switching unit at each input side transfer unit, such that those packets destined to non-congested transfer targets are transferred to the switching unit at higher priority by accounting for the congestion status of a transfer target of each packet. 11. The packet switch of claim 1, wherein a packet with the priority level attached thereto is transferred from a input side transfer unit via the switching unit to a output side transfer unit, the switching unit transfers one colliding packet selected from colliding packets by accounting for the priority level attached to each colliding packet, to the output side transfer unit when a packet collision occurs inside the switching unit while discarding other colliding packets inside the switching unit, the input side transfer unit re-transmits each discarded packet when a packet discarding due to the packet collision is detected, and the priority level attaching unit is provided at the input side transfer unit and sets the priority level to be attached to each re-transmission packet higher than the priority level originally attached to a corresponding discarded packet. 12. The packet switch of claim 1, wherein a packet with the priority level attached thereto is transferred from a input side transfer unit via the switching unit to an output side transfer unit, the switching unit transfers one colliding packet selected from colliding packets by accounting for the priority level attached to each colliding packet, at higher priority to the output side transfer unit when a packet collision occurs inside the switching unit, the priority level attaching unit is provided at the input side transfer unit, and p1 when a plurality of packets subdividing one data are to be transferred from the input side transfer unit, the priority level attaching unit sets the priority level of one packet corresponding to a top portion of said one data lower than the priority level of other packets corresponding to subsequent portions of said one data. 13. The packet switch of claim 12, wherein the priority level attaching unit sets the priority level of said one packet than the priority level of the other packets by setting the priority level of the other packets higher than the priority level attached to packets that do not belong to said plurality of packets subdividing one data. 14. The packet switch of claim 1, wherein each in
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