Back to results
US 7,548,554 B2Granted
Methods for controlling transmission of high-speed data traffic in IPDLs
AssigneeHuawei Technologies Co., Ltd.
InventorNing Su
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeHuawei Technologies Co., Ltd.
InventorNing Su
Estimating the term…
The transmission of high-speed data traffic in IPDLs at a base station of a cellular communications network is controlled. An IPDL is identified which occurs within a set of time slots of a given channel. The channel may comprise a dedicated time slot channel or a packet-oriented time slot channel. More specifically, the channel may comprise a Dedicated Physical Control Channel or a High Speed Downlink Shared Channel. The information within a time slot of the set is shifted. In accordance with one aspect of the invention, the information is shifted to a reduced portion of the time slot of the channel by reducing a spread spectrum factor for the signal carrying the information and increasing the transmission power of the signal. A remaining portion of the time slot spans at least a duration of the identified IPDL. In accordance with another aspect of the invention, the information within the time slot is shifted to another time slot of the channel.
A method for controlling transmission of high-speed data traffic in IPDLs in a wireless communication network, said method comprising:
A method for controlling transmission of high-speed data traffic in IPDLs in a wireless communication network, said method comprising:
The method for controlling transmission of high-speed data traffic in IPDLs of chain 4, wherein when the transmitting power is increased, it is doubled.
A method for controlling transmission of high-speed data traffic in IPDLs in a wireless communication network, said method comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
From the US filing history. Foreign family members aren’t listed.
Traffic management, e.g. flow control or congestion control: optimizing the usage of the radio link, e.g. header compression, information sizing ,…
Spread spectrum techniques: using direct sequence modulation
Access restriction ; Network selection; Access point selection: discovering, processing access restriction or access information
Transmission power control [TPC]: signalisation aspects of the TPC commands, e.g. frame structure
Term ended 27 Sep 2024 (estimated)
The present application claims priority to Chinese Application No. 01 144553.X filed Dec. 20, 2001, the content of which is hereby expressly incorporated by reference in its entirety.
1. Field of the Invention
The present invention relates to a method for high-speed data transmission in wireless communication systems, particularly to a method for controlling transmission of high-speed data traffic in IPDLs.
FIG. 1 is the flow chart of an embodiment of a method according to the present invention.
FIG. 2 shows the position where an IPDL occur
FIG. 3 shows the position where an IPDL occupies a time slot of DPCH.
The present invention is described in further detail according to the drawings and the embodiment.
A high-speed data traffic downlink carries data information and corresponding control information. Usually the control information is transmitted through Dedicated Physical Control Channel (DPCH), while the data information is transmitted through High Speed Downlink Shared Channel (HS-DSCH). The DPCH is allocated for each user, and the HS-DSCH is shared by all users, and data of different users is identified through time division and code division in the HS-DSCH. The users' control information in HS-DSCH is transmitted to the mobile station several TTIs ahead through the users' DPCH so as to know the modulation and encoding formats related to the data in the HS-DSCH in advance. Accordingly, when the data arrives, correct demodulation and decoding can be performed. Therefore, an IPDL can result in not only loss of data in the current HS-DSCH but also loss of control information in the current DPCH. As a result, it will affect correct demodulation and decoding for subsequent data.
On the basis of the analysis, if the IPDL occurs in the DPCH, the spread spectrum factor of 2 time slots adjacent to the IPDL shall be halved; if an IPDL occurs in the HS-DSCH, the signal transmitted during the time slot can be adjusted or closed on the whole according to the position of the IPDL, and the influence of IPDL can be reduced.