Methods to reduce uplink co-channel interference
A co-channel interference and link technology, applied in the field of communication, can solve problems such as uplink co-channel interference, and achieve the effect of reducing uplink co-channel interference and co-channel interference.
Inactive Publication Date: 2011-11-30
ZTE CORP
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[0004] The disadvantage of using this method is that there will be serious co-channel interference between the uplinks of the base stations. How to effectively reduce the co-channel interference is a problem that must be considered in system configuration.
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[0018] The specific implementation manners of the present invention will be described in detail below with reference to the accompanying drawings.
[0019] figure 1 It is a flowchart of a method for reducing uplink co-channel interference according to the present invention. Such as figure 1 Said, the method includes the following steps: step S102, assigning different ranging codeword sets and different ranging areas to different base stations in the same cell through different uplink time slots; and step S104, in the process of ranging In this method, one or more user terminals belonging to the same base station send ranging access signals using the ranging codewords in the ranging codeword set set for the cell to which the base station belongs within the ranging area allocated to the cell to which the base station belongs.
[0020] Wherein, the uplink time slots used for ranging in the same cell are evenly allocated to multiple base stations in the cell. The number of base...
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The present invention provides a method for reducing uplink co-frequency interference, one of which includes the following steps: step S102, assigning different ranging codeword sets and different ranging codeword sets and different ranging codeword sets to different base stations in the same cell through different uplink time slots and step S104, during the ranging process, one or more user terminals belonging to the same base station use the ranging code set for the cell to which the base station belongs within the ranging area allocated to the cell to which the base station belongs The ranging codewords in the word set send ranging access signals. Using the configuration strategy of the present invention, compared with the prior art, significant progress has been made in reducing the uplink co-channel interference between system base stations. The terminal does not support the PUSC3Segment method of using some subcarriers, and can only support PUSC to use all subcarriers. Under the condition of the mode, the co-channel interference between the systems is effectively reduced.
Description
technical field [0001] The invention relates to the communication field, in particular to a method for reducing uplink same-frequency interference. Background technique [0002] In recent years, OFDM technology has become the mainstream of wireless communication physical layer technology due to its high spectrum efficiency and anti-multipath interference, whether it is the subsequent evolution of 3G (such as LTE) or the current popular wireless broadband access technology (such as IEEE802.16, IEEE802.20) have adopted OFDM as a physical layer technology to provide multiple access (OFDMA). [0003] The WiMax system is an OFDMA system that supports the IEEE802.16e protocol. In the networking of this system, some terminals may not support PUSC3Segment using part of the subcarriers, and can only support PUSC using all subcarriers. In the case of the mode, in order to adapt to the capabilities of the terminal and support three sectors, the base station side often adopts a tempora...
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IPC IPC(8): H04W16/02H04L27/26
Inventor 邱刚韩光涛陈永健刘颖刘向宇
Owner ZTE CORP