CN101527593B - Method and device for removing interference between cells based on time division duplex wireless communication system - Google Patents

Method and device for removing interference between cells based on time division duplex wireless communication system Download PDF

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CN101527593B
CN101527593B CN2008100816796A CN200810081679A CN101527593B CN 101527593 B CN101527593 B CN 101527593B CN 2008100816796 A CN2008100816796 A CN 2008100816796A CN 200810081679 A CN200810081679 A CN 200810081679A CN 101527593 B CN101527593 B CN 101527593B
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physical frame
physical
low power
power transmissions
frame
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CN101527593A (en
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辛雨
方永刚
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中兴通讯股份有限公司
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Abstract

The invention discloses a method and a device for removing interference between cells based on a wireless communication TTD system. In the method for removing interference between the cells, one or more physical frame sets which are superposed and have different transmission modes in time domain and in physical frames of a plurality of neighboring cells are determined; for each physical frame set, partial or total physical frames of the physical frame set are arranged to low-power signal emission respectively. The method can avoid different proportions of the number of the uplink/downlink physical frames of the neighboring cells with same frequency band and the interference of uplink/downlink signals.

Description

Inter-cell interference cancellation method and device based on TDD radio communication system

Technical field

The present invention relates to the communications field, particularly, relate to inter-cell interference cancellation method and device based on TDD (Time DivisionDuplex, time division duplex) wireless communication system.

Background technology

To carry out as unit in the wireless system of transfer of data take superframe (superframe), the Uplink/Downlink of radio open transmission generally carries out the transmission of data take superframe as unit; Each superframe is comprised of a preamble (leading) and several PHY Frame (physical frame); Preamble and PHY Frame form for base unit with OFDM (OrthogonalFrequency Division Multiplexing, OFDM) Symbol (symbol).

Present UMB (Ultra Mobile Broadband, super mobile broadband), LTE (Long-Term Evolution, Long Term Evolution), Wimax (WorldwideInteroperability for Microwave Access, micro-wave access to global intercommunication) there are two kinds of duplex modes in system, be FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) mode and TDD mode.

Under the FDD mode, Uplink/Downlink adopts different frequency band transmission, and like this, the resource of the PHY Frames of the up/down row of system is distributed relatively independent.

Under the TDD mode, Uplink/Downlink uses identical frequency range timesharing to transmit.According to the needs of business, system can be divided into ascending physical signal frame and downstream physical frame with PHY Frames according to certain ratio.

In realizing process of the present invention, the inventor finds that there are the following problems: if similar frequency bands neighbor cell up/down row PHY Frames number ratio is not identical, then may cause interference between neighbor cell under the TDD mode, for this problem, also there is not at present effectively solution; In addition, in the situation that the not alignment of similar frequency bands neighbor cell superframe also can appear at the situation that causes interference between the neighbor cell, for this problem, there is not at present effectively solution yet.

Summary of the invention

Consider that a kind of technology of the needs that exist in the correlation technique solves the neighbor cell up/down row PHY Frames number ratio of similar frequency bands and may cause the problem of interference between neighbor cell when not identical and propose the present invention.For this reason, the present invention aims to provide a kind of inter-cell interference cancellation method and device, is used for solving the problems referred to above that correlation technique exists.

According to an aspect of the present invention, provide a kind of inter-cell interference cancellation method based on the TDD system, be used for eliminating the interference of the uplink/downlink signals between the different a plurality of neighbor cells of same frequency range uplink/downlink physical frame ratio.

Inter-cell interference cancellation method according to the embodiment of the invention comprises following processing: determine in the physical frame of a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different; For each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively.

Alternatively, the operation that physical frame is set to the low power transmissions signal is specially, and the whole physical resources in the physical frame are set to the low power transmissions signal, and perhaps, the part physical resource in the physical frame is set to the low power transmissions signal.The mode of wherein, dividing physical resource be following any: time domain mode, frequency domain mode, time-frequency two-dimensional mode.

Preferably, in the situation that physical set comprises two above physical frames, whole ascending physical signal frames of physical frame groups are set to the low power transmissions signal, and perhaps, whole downstream physical frame of physical frame groups are set to the low power transmissions signal.

Alternatively, the operation that physical frame is set to the low power transmissions signal is specially, and physical frame is set to zero energy and transmits, and perhaps, the part physical resource in the described physical frame is set to zero energy and transmits.

Wherein, the length of the superframe at the physical frame place of above-mentioned a plurality of neighbor cell can be identical, also can be not identical.In the situation that superframe length is identical, can be by on time domain, the superframe of each neighbor cell being alignd to determine physical frame groups from beginning to end.

Wherein, above-mentionedly overlappingly refer to that ascending physical signal frame and downstream physical frame in the physical frame groups have part or all of physical resource overlapping.

According to a further aspect in the invention, also provide another kind of inter-cell interference cancellation method based on the TDD system, be used for eliminating the from beginning to end interference of the uplink/downlink signals of unjustified a plurality of neighbor cells of same frequency range superframe.

Inter-cell interference cancellation method according to the embodiment of the invention comprises following processing: determine in the physical frame of a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different; For each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively.

Preferably, the operation that physical frame is set to the low power transmissions signal is specially, and the whole physical resources in the physical frame are set to the low power transmissions signal, and perhaps, the part physical resource in the physical frame is set to the low power transmissions signal.

Preferably, in the situation that physical set comprises two above physical frames, whole ascending physical signal frames of physical frame groups are set to the low power transmissions signal, and perhaps, whole downstream physical frame of physical frame groups are set to the low power transmissions signal.

Wherein, the uplink/downlink physical frame ratio of above-mentioned a plurality of neighbor cells can be identical; Perhaps, the uplink/downlink physical frame ratio of above-mentioned a plurality of neighbor cells also can be different.

According to a further aspect in the invention, provide a kind of inter-cell interference cancellation device based on the TDD system, be used for eliminating the interference of the uplink/downlink signals between a plurality of neighbor cells of same frequency range.

Inter-cell interference cancellation device according to the present invention comprises: determination module, determine in the physical frame of a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different; Module is set, and for each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively.

Wherein, the operation that the module physical frame is set to the low power transmissions signal is set is specially, the whole physical resources in the physical frame are set to the low power transmissions signal, and perhaps, the part physical resource in the physical frame is set to the low power transmissions signal.

By above-mentioned one or more technical schemes provided by the invention, by so that the method that the part or all of physical frame in the overlapping physical frame does not transmit with normal power simultaneously on time domain, the interference of uplink/downlink signals appears in the time of can avoiding the neighbor cell up/down row physical frame number ratio of similar frequency bands not identical, also can avoid because the interference of the uplink/downlink signals that causes of alignment of similar frequency bands neighbor cell superframe head and the tail has remedied the defective that correlation technique exists in this technical problem.

Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.

Description of drawings

Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the flow chart based on the inter-cell interference cancellation method of TDD system according to the inventive method embodiment one;

Fig. 2 is the schematic diagram of the example 1 of method shown in Figure 1;

Fig. 3 is the schematic diagram of the example 2 of method shown in Figure 1;

Fig. 4 is the flow chart based on the presence of intercell interference residential quarter method of TDD system according to the inventive method embodiment two;

Fig. 5 is the structured flowchart based on the inter-cell interference cancellation device of TDD system according to apparatus of the present invention embodiment.

Embodiment

As mentioned above, when the neighbor cell up/down row PHY Frames number ratio of similar frequency bands is not identical, may between neighbor cell, cause interference; In the situation that the not alignment of similar frequency bands neighbor cell superframe also may also can cause interference between neighbor cell.At this moment, how to process be a key issue in the networking process in system.

Given this, the embodiment of the invention provides a kind of inter-cell interference cancellation method and device based on the TDD system.

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.

Embodiment of the method one

According to the embodiment of the invention, a kind of inter-cell interference cancellation method based on the TDD system is provided, be used for eliminating the interference of the uplink/downlink signals between the different a plurality of neighbor cells of same frequency range uplink/downlink physical frame ratio.

As shown in Figure 1, the inter-cell interference cancellation method according to the embodiment of the invention comprises following processing:

Step S102 determines in the physical frame of a plurality of neighbor cells the overlapping and different one or more physical frame groups of transmission means (that is, uplink transmission mode and downlink transmission mode) on time domain; So-called overlapping, refer to that ascending physical signal frame and the downstream physical frame in the described physical frame groups has part or all of physical resource overlapping.

Step S104, for each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively, disturbs to avoid the signal between up and descending.

Wherein, the operation that physical frame is set to the low power transmissions signal is specially, whole physical resources in the physical frame are set to the low power transmissions signal, perhaps, part physical resource in the physical frame is set to the low power transmissions signal, the mode of wherein, dividing physical resource be following any: time domain mode, frequency domain mode, time-frequency two-dimensional mode.

Need to prove, in this article, " the PHY Frame of low power transmissions signal " is called Low Power PHY Frame, refer to that part physical resource or whole physical frame in this physical frame adopt the low power transmissions signal, in addition, " low power transmissions signal " as referred to herein also comprises situation about not transmitting, and namely comprises the low power transmissions signal of zero energy.

Wherein, the length of the superframe (superframe) at the physical frame place of above-mentioned a plurality of neighbor cells can be identical, also can be not identical.In the situation that superframe length is identical, can align from beginning to end to determine physical frame groups by the superframe with a plurality of neighbor cells.

Above-mentioned a plurality of neighbor cells can be two neighbor cells, also can be plural neighbor cells.Situation for two neighbor cells, above-mentioned physical frame groups can be understood as physical frame pair, further, a physical frame that can physical frame centering is set to the low power transmissions signal, also two physical frames of physical frame centering all can be set to the low power transmissions signal; Situation for a plurality of neighbor cells; whole downstream physical frame in can physical set are set to the low power transmissions signal; whole ascending physical signal frames in also can physical frame groups are set to the low power transmissions signal; certainly; also can adopt other suitable set-up modes; the present invention is not limited in this respect, all within protection scope of the present invention.

Based on above description, below will further by example the technical scheme that the embodiment of the invention provides be described.

1: two neighbor cell of example

In order to set forth conveniently, in this example, for the not identical situation of up/down row PHYFrames number ratio of two neighbor cells, suppose that first the length of the superframe of system equates, as shown in Figure 2.

Further suppose two a kind of 5:3 of being of TDD Mode mode that neighbor cell adopts, another kind is 4:4.To those skilled in the art, can understand, for other TDD Mode mode, the method for the embodiment of the invention is applicable too.

For TDD 5:3 mode, a superframe comprises leading and 24 PHYFrames.Specifically, in superframe, comprise successively leading, 5 a descending transmission block, very first time interval, 3 uplink transmission block, second time interval, 5 another downstream transmission blocks, the 3rd time interval, 3 another uplink transmission block, the 4th time interval, 5 another downstream transmission blocks, the 5th time interval and 3 another uplink transmission blocks that continuous ascending physical signal frame forms that continuous downstream physical frame forms that continuous ascending physical signal frame forms that continuous downstream physical frame forms that continuous ascending physical signal frame forms that continuous downstream physical frame forms.

For TDD 4:4 mode, a superframe comprises leading and 24 PHYFrames.Specifically, in superframe, comprise successively leading, 4 a descending transmission block, very first time interval, 4 uplink transmission block, second time interval, 4 another downstream transmission blocks, the 3rd time interval, 4 another uplink transmission block, the 4th time interval, 4 another downstream transmission blocks, the 5th time interval and 4 another uplink transmission blocks that continuous ascending physical signal frame forms that continuous downstream physical frame forms that continuous ascending physical signal frame forms that continuous downstream physical frame forms that continuous ascending physical signal frame forms that continuous downstream physical frame forms.

The length of the superframe of above-mentioned two kinds of TDD Mode modes equates, and head and the tail align in time.

As shown in Figure 2, in the superframe, F4, the F9 of the descending PHYFrame of TDD 5:3 mode and F14 are overlapping on time domain with R0, R4 and the R8 of the up PHY Frame of TDD 4:4 mode respectively, like this, just there is interference in the upward signal of the downstream signal of TDD 5:3 mode and TDD4:4 mode.

In embodiments of the present invention, can F4 and R0 in one of them physical frame be set to the low power transmissions signal, can also make these two physical frames of F4 and R0 all be set to the low power transmissions signal.Particularly, the part physical resource in F4 physical frame that can TDD 5:3 mode, the R0 physical frame of TDD 4:4 mode is set to the low power transmissions signal, also can be set to the low power transmissions signal in whole goods and materials source wherein.

Particularly, if make part physical resource or the whole physical frame of the F4 physical frame of TDD 5:3 mode be set to the low power transmissions signal, the R0 physical frame of TDD 4:4 mode just can transmit with normal power so, also can the low power transmissions signal, also can part physical resource low power transmissions signal; In a word, the R0 physical frame of the F4 physical frame of TDD 5:3 mode and TDD 4:4 mode can not all transmit with normal power simultaneously.In other words, in embodiments of the present invention, make the R0 physical frame of the F4 physical frame of TDD 5:3 mode and/or TDD 4:4 mode adopt the mode of Low Power PHY Frame.Like this, the problem of the R0 physical frame of the F4 physical frame of TDD 5:3 mode and TDD 4:4 mode with regard to not existing signal to disturb.

In like manner, for fear of interference, make the R4 physical frame of the F9 physical frame of TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low Power PHY Frame; Make the R8 physical frame of the F14 physical frame of TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low PowerPHY Frame.

For the different situation of the superframe length of two neighbor cells, the present invention is applicable too.That is, as long as have ascending physical signal frame and downstream physical frame overlapping on the time domain, just one of them is set to adopt the mode of Low Power PHY Frame.

Described above is that the quantity of neighbor cell is two situation, and for the quantity of the neighbor cell situation more than two, the present invention is applicable too.Following example has provided concrete technical scheme.

Example 2: a plurality of neighbor cells

As mentioned above, in the situation that there are a plurality of neighbor cells, can adopt whole ascending physical signal frames to be set to adopt the mode of Low Power PHY Frame, also can whole downstream physical frame be set to adopt the mode of Low Power PHY Frame.

In order to set forth conveniently, in this example, suppose to exist three not identical neighbor cells of up/down row PHY Frames number ratio, be respectively residential quarter 1, residential quarter 2, residential quarter 3, and suppose that the length of the superframe of system equates, as shown in Figure 3.

Further in three neighbor cells of hypothesis, the TDD Mode mode that adopt residential quarter 1 is 5:3, the TDD Mode mode that adopt residential quarter 2 is 4:4, the TDD Mode mode that adopt residential quarter 3 is 5:3, as shown in Figure 3, in the superframe, the F4 of the descending PHY Frame of TDD 5:3 mode, F9 and F14 (residential quarter 1) respectively with the R0 of the up PHY Frame of TDD 4:4 mode, R4 and R8 (residential quarter 2), and the F4 of another descending PHY Frame of TDD 5:3 mode, F9 and F14 (residential quarter 3) are overlapping on time domain, like this, just there is interference in the upward signal of the downstream signal of TDD 5:3 mode and TDD 4:4 mode.

In embodiments of the present invention, can make the R0 physical frame of the F4 physical frame (residential quarter 3) of the F4 physical frame (residential quarter 1) of TDD 5:3 mode and TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low Power PHY Frame, particularly, if make two F4 physical frames of TDD 5:3 mode all adopt the mode of Low Power PHY Frame, the R0 physical frame of TDD 4:4 mode just can transmit with normal power so, also can the low power transmissions signal, also can part physical resource low power transmissions signal; If make the R0 physical frame of TDD 4:4 mode adopt the mode of Low Power PHY Frame, one or two F4 physical frames of TDD 5:3 mode just can transmit with normal power so, also can the low power transmissions signal, also can part physical resource low power transmissions signal; In a word, the R0 physical frame of two of the TDD5:3 mode F4 physical frames and TDD 4:4 mode can not all transmit with normal power simultaneously.In other words, in embodiments of the present invention, make the R0 physical frame of two F4 physical frames of TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low PowerPHY Frame.Like this, the R0 physical frame of two of TDD 5:3 mode F4 physical frames and the TDD 4:4 mode problem that just can not exist signal to disturb.

In like manner, for fear of interference, can make the R4 physical frame of two F9 physical frames of TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low Power PHY Frame; Make the R8 physical frame of two F14 physical frames of TDD 5:3 mode or TDD 4:4 mode adopt the mode of Low Power PHY Frame.

For the different situation of the superframe length of each neighbor cell, the present invention is applicable too.That is, as long as have ascending physical signal frame and downstream physical frame overlapping on the time domain, whole ascending physical signal frames or the whole downstream physical frame mode that is set to adopt Low Power PHY Frame just.Certainly, to those skilled in the art, easily expect, can adopt other mode that physical frame or the physical resource that adopts Low Power PHY Frame mode is set.

Described above is interference elimination method in the not identical situation of the uplink/downlink physical frame ratio of neighbor cell, in fact, no matter whether the uplink/downlink physical frame ratio of neighbor cell is identical, do not have in the situation of alignment at the superframe of above-mentioned neighbor cell, all may occur disturbing.Following embodiment has further provided concrete solution.

Embodiment of the method two

According to the embodiment of the invention, a kind of inter-cell interference cancellation method based on the TDD system is provided, be used for eliminating the from beginning to end interference of the uplink/downlink signals of unjustified a plurality of neighbor cells of same frequency range superframe, the uplink/downlink physical frame ratio of a plurality of neighbor cells of mentioning here can be identical, also can be different, and the length of the superframe of neighbor cell can be identical, also can be different.

As shown in Figure 4, the inter-cell interference cancellation method based on the TDD system according to the embodiment of the invention comprises following processing:

Step S402 determines in the physical frame of a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different;

Step S404, for each physical frame groups, part physical resource in the physical frame groups or part or all of physical frame are set to the low power transmissions signal respectively, particularly, can be respectively all ascending physical signal frames in the physical frame groups (can be one or more) or all downstream physical frame (can be one or more) be set to adopt the mode of Low Power PHY Frame.

In addition, similar with embodiment of the method one, the whole physical resources in can physical frame are set to the low power transmissions signal, and the part physical resource in also can physical frame is set to the low power transmissions signal.

By the technical scheme that the present embodiment provides, can eliminate the uplink/downlink interference that causes owing to the superframe head and the tail are unjustified between the neighbor cell of similar frequency bands.

Device embodiment

According to the embodiment of the invention, a kind of inter-cell interference cancellation device based on the TDD system is provided, interference for the uplink/downlink signals between a plurality of neighbor cells of eliminating same frequency range, comprise the interference that causes owing to uplink/downlink physical frame ratio difference, and other are because the unjustified interference that causes of superframe head and the tail.

Fig. 5 is the block diagram based on the inter-cell interference cancellation device of TDD system that illustrates according to the embodiment of the invention.As shown in Figure 5, this device comprises: determination module 502, determine in the physical frame of a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different; Module 504 is set, be connected to determination module 502, for each physical frame groups, part or all of physical frame is set to the low power transmissions signal in the physical frame groups respectively, particularly, can (can be one or more modes that adopt Low Power PHYFrame that are placed as with all ascending physical signal frames in the physical frame groups (can be one or more) or all downstream physical frame.

A plurality of details among this embodiment can be understood with reference to the embodiment of the method that provides above, no longer same or similar content are repeated in this description at this.

As mentioned above, the above-mentioned one or more technical schemes that provide by means of the embodiment of the invention, by so that on time domain the part or all of physical frame in the overlapping physical frame do not transmit with normal power simultaneously, the interference of uplink/downlink signals appears when having avoided the neighbor cell up/down row physical frame number ratio of similar frequency bands not identical, avoided because the interference of the uplink/downlink signals that causes of alignment of similar frequency bands neighbor cell superframe head and the tail has remedied the defective that correlation technique exists in this technical problem.

The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (14)

1. the inter-cell interference cancellation method based on tdd systems is used for eliminating the interference of the uplink/downlink signals between the different a plurality of neighbor cells of same frequency range uplink/downlink physical frame ratio, it is characterized in that, described method comprises:
Determine in the physical frame of described a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different;
For each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively.
2. method according to claim 1, it is characterized in that, the operation that physical frame is set to the low power transmissions signal is specially: the whole physical resources in the described physical frame are set to the low power transmissions signal, perhaps, the part physical resource in the described physical frame is set to the low power transmissions signal.
3. method according to claim 2 is characterized in that, the mode of dividing described physical resource be following any: time domain mode, frequency domain mode, time-frequency two-dimensional mode.
4. method according to claim 1 and 2, it is characterized in that, in the situation that described physical frame groups comprises two above physical frames, whole ascending physical signal frames of described physical frame groups are set to the low power transmissions signal, perhaps, whole downstream physical frame of described physical frame groups are set to the low power transmissions signal.
5. method according to claim 1, it is characterized in that, the operation that physical frame is set to the low power transmissions signal is specially: described physical frame is set to zero energy and transmits, and perhaps, the part physical resource in the described physical frame is set to zero energy and transmits.
6. method according to claim 1 is characterized in that, the length of the superframe at the physical frame place of described a plurality of neighbor cells is identical or different.
7. method according to claim 6 is characterized in that, in the identical situation of the length of the superframe at the physical frame place of described a plurality of neighbor cells, by in time domain the superframe of described a plurality of neighbor cells being alignd to determine described physical frame groups from beginning to end.
8. method according to claim 1 is characterized in that, describedly overlappingly refers to that ascending physical signal frame and downstream physical frame in the described physical frame groups have part or all of physical resource overlapping.
9. the inter-cell interference cancellation method based on tdd systems is used for eliminating the from beginning to end interference of the uplink/downlink signals of unjustified a plurality of neighbor cells of same frequency range superframe, it is characterized in that, described method comprises:
Determine in the physical frame of described a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different;
For each physical frame groups, the part or all of physical frame in the physical frame groups is set to the low power transmissions signal respectively.
10. method according to claim 9, it is characterized in that, the operation that physical frame is set to the low power transmissions signal is specially, whole physical resources in the described physical frame are set to the low power transmissions signal, perhaps, part physical resource in the described physical frame is set to the low power transmissions signal, wherein, the mode of dividing described physical resource be following any: time domain mode, frequency domain mode, time-frequency two-dimensional mode.。
11. method according to claim 9, it is characterized in that, in the situation that described physical frame groups comprises two above physical frames, whole ascending physical signal frames of described physical frame groups are set to the low power transmissions signal, perhaps, whole downstream physical frame of described physical frame groups are set to the low power transmissions signal.
12. method according to claim 9 is characterized in that, the uplink/downlink physical frame ratio of described a plurality of neighbor cells is identical or different.
13. inter-cell interference cancellation device based on tdd systems, be used for eliminating the interference of the uplink/downlink signals between the different a plurality of neighbor cells of same frequency range uplink/downlink physical frame ratio or be used for eliminating the from beginning to end interference of the uplink/downlink signals of unjustified a plurality of neighbor cells of same frequency range superframe, it is characterized in that, described device comprises:
Determination module is determined in the physical frame of described a plurality of neighbor cells one or more physical frame groups overlapping on time domain and that transmission means is different;
Module is set, and for each physical frame groups, part or all of physical frame is set to the low power transmissions signal in the physical frame groups respectively.
14. device according to claim 13, it is characterized in that, describedly the operation that the module physical frame is set to the low power transmissions signal is set is specially, whole physical resources in the described physical frame are set to the low power transmissions signal, perhaps, the part physical resource in the described physical frame is set to the low power transmissions signal.
CN2008100816796A 2008-03-05 2008-03-05 Method and device for removing interference between cells based on time division duplex wireless communication system CN101527593B (en)

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CN1925631A (en) * 2005-08-31 2007-03-07 华为技术有限公司 Method for providing broadcast multicast service to users

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