CN102487512B - Interference control method and device - Google Patents
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Abstract
The invention discloses an interference control method and device. The method comprises the following steps of: determining subframes of a neighbor cell for transmitting a packet broadcast channel (PBCH) and a synchronous channel (SS) respectively; and processing the determined subframes respectively: determining resource blocks (RBs) corresponding to the RBs occupied by the PBCH and SS of the neighbor cell in the system bandwidth of a cell and reducing the dispatching priorities or transmitting powers of the corresponding RBs to be lower than the dispatching priorities or transmitting powers of the RBs except the corresponding RBs, or processing the determined subframes respectively: determining orthogonal frequency division multiplexing (OFDM) symbols corresponding to the OFDM symbols occupied by the PBCH and SS of the neighbor cell in all the OFDM symbols occupied by the cell and reducing the transmitting powers of the corresponding OFDM symbols to be lower than the transmitting powers of the OFDM symbols except the corresponding OFDM symbols. The properties of the PBCH and SS can be improved by applying the method and the device.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to an interference control method and apparatus.
Background
Currently, the Long Term Evolution (LTE) system mainly adopts the following two networking modes: the network deployment method with the frequency reuse factor of N and the network deployment method with the frequency reuse factor of 1 are provided, and N is a positive integer larger than 1.
In the first networking mode, the total available bandwidth of the system is divided into N subbands, each subband is orthogonal to another subband, and N different cells respectively occupy N different subbands.
Fig. 1 is a schematic diagram of a networking scheme with a frequency reuse factor N in the prior art. As shown in fig. 1, assuming that the total available bandwidth is 60MHz, the total available bandwidth is divided into 3 sub-bands (i.e., the value of N is 3), each sub-band is 20MHz (i.e., the system bandwidths of 3 cells are 20MHz), and each 3 sub-bands are orthogonal to each other, and cell a, cell B, and cell C occupy different sub-bands respectively.
In the second networking mode, the total available bandwidth is not divided, and different cells all occupy the total available bandwidth.
Fig. 2 is a schematic diagram of a networking scheme with a frequency reuse factor of 1. As shown in fig. 2, assuming that the total available bandwidth is 20MHz, cell a, cell B, and cell C all occupy the 20MHz bandwidth.
For the first networking mode, because the subbands occupied by each cell are orthogonal pairwise, the interference between the cells is small, but the bandwidth utilization rate under the networking mode is low. For the second networking method, although the bandwidth utilization rate can be improved, the interference between cells is large, and especially the interference is serious for edge users.
In order to solve the above problem, another networking method, i.e., a frequency shift and frequency reuse networking method, has been proposed in the prior art.
In the networking mode, the total available bandwidth is divided into N sub-bands, N is a positive integer larger than 1, every two of the N sub-bands are orthogonal or have an overlapping part, and at least two sub-bands have an overlapping part; calculating the correlation between each sub-band and other sub-bands respectively, wherein the correlation refers to the proportion of the overlapping part between the two sub-bands to the sum of the bandwidths of the two sub-bands, and the more the overlapping part between the two sub-bands is, the greater the correlation between the two sub-bands is; the less correlated subbands are assigned to adjacent cells and the more correlated subbands are assigned to cells that are further apart.
Fig. 3 is a schematic diagram of a conventional frequency shift and frequency reuse networking scheme. As shown in fig. 3, assuming that the total available bandwidth is 22.16MHz, the total available bandwidth is divided into 3 sub-bands (i.e., the value of N is 3), each sub-band is 20MHz, and overlapping portions exist between every two sub-bands, and a cell a, a cell B, and a cell C occupy different sub-bands respectively.
It can be seen that, compared with the two previous networking modes, the networking mode takes the two factors of inter-cell interference and bandwidth utilization into full consideration, and neither causes too much inter-cell interference nor too low bandwidth utilization. However, this method also has a problem in practical use.
Fig. 4 is a schematic diagram of downlink channels of each cell in the networking mode shown in fig. 3. As shown in fig. 4, a broadcast channel (PBCH) occupies a 1.08MHz frequency band (diagonal filled portion) in the middle of the system bandwidth of each cell, and a Physical Downlink Shared Channel (PDSCH) occupies the rest frequency band (unfilled portion), or a synchronization channel (SS) occupies the 1.08MHz frequency band, and a PDSCH channel still occupies the rest frequency band, and the broadcast channel and the synchronization channel are usually transmitted in different subframes; it can be seen that the frequency bands occupied by the broadcast channels and the synchronization channels of 3 cells are orthogonal to each other, and for any one cell, such as the synchronization channel and the broadcast channel of cell a, when the load of cell C is light, the PDSCH channel is rarely transmitted, and the interference between cells on the broadcast channel and the synchronization channel of cell a is very small, but if the load of cell C is heavy, and the PDSCH channel is continuously transmitted, the interference between cells on the broadcast channel and the synchronization channel of cell a is severe, and the performance of the broadcast channel and the synchronization channel is affected.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide two interference control methods, which can improve the performance of the broadcast channel and the synchronization channel.
Another object of the present invention is to provide two interference control apparatuses capable of improving the performance of a broadcast channel and a synchronization channel.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an interference control method, comprising:
respectively determining subframes of adjacent cells for sending broadcast channels and synchronous channels;
and respectively performing the following processing on each determined subframe: and determining the RB corresponding to the resource block RB occupied by the broadcast channel and the synchronous channel of the adjacent cell in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RB to be lower than that of the RBs except the corresponding RB.
An interference control method, comprising:
respectively determining subframes of adjacent cells for sending broadcast channels and synchronous channels;
and respectively performing the following processing on each determined subframe: determining OFDM symbols corresponding to OFDM symbols occupied by broadcast channels and synchronous channels of adjacent cells in all OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of OFDM symbols except the corresponding OFDM symbols.
An interference control device comprising:
the first processing unit is used for respectively determining the subframes of the adjacent cell for sending the broadcast channel and the synchronous channel;
a second processing unit, configured to perform the following processing on each determined subframe: and determining the RB corresponding to the resource block RB occupied by the broadcast channel and the synchronous channel of the adjacent cell in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RB to be lower than that of the RBs except the corresponding RB.
An interference control device comprising:
the first processing unit is used for respectively determining the subframes of the adjacent cell for sending the broadcast channel and the synchronous channel;
a second processing unit, configured to perform the following processing on each determined subframe: determining OFDM symbols corresponding to OFDM symbols occupied by broadcast channels and synchronous channels of adjacent cells in all OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of OFDM symbols except the corresponding OFDM symbols.
Therefore, by adopting the technical scheme of the invention, the scheduling priority or the transmitting power of the RB which possibly generates interference on the broadcast channel and the synchronous channel is reduced, or the transmitting power of the OFDM symbol which possibly generates interference on the broadcast channel and the synchronous channel is reduced, thereby reducing the interference on the broadcast channel and the synchronous channel and improving the performance of the broadcast channel and the synchronous channel.
Drawings
Fig. 1 is a schematic diagram of a networking scheme with a frequency reuse factor N in the prior art.
Fig. 2 is a schematic diagram of a networking scheme with a frequency reuse factor of 1.
Fig. 3 is a schematic diagram of a conventional frequency shift and frequency reuse networking scheme.
Fig. 4 is a schematic diagram of downlink channels of each cell in the networking mode shown in fig. 3.
FIG. 5 is a flow chart of a first embodiment of the method of the present invention.
FIG. 6 is a flow chart of a second embodiment of the method of the present invention.
FIG. 7 is a schematic diagram of the structure of the device according to the present invention.
Detailed Description
Aiming at the problems in the prior art, the invention provides a brand-new interference control scheme, and the aim of improving the performance of a broadcast channel and a synchronous channel is achieved by reducing the scheduling priority or the transmitting power of Resource Blocks (RBs) which may generate interference on the broadcast channel and the synchronous channel or reducing the transmitting power of Orthogonal Frequency Division Multiplexing (OFDM) symbols which may generate interference on the broadcast channel and the synchronous channel.
In order to make the technical solution of the present invention clearer and more obvious, the solution of the present invention is further described in detail below by referring to the drawings and examples.
FIG. 5 is a flow chart of a first embodiment of the method of the present invention. As shown in fig. 5, the method comprises the following steps:
step 51: and respectively determining the sub-frames of the adjacent cell for transmitting the broadcast channel and the synchronous channel.
The neighboring cell in the solution of the present invention generally refers to a neighboring cell that is relatively close to the physical location of the cell.
In this step, according to the pre-configuration, it is determined whether the time for each cell in the network to transmit the broadcast channel is synchronous, that is, whether the broadcast channels of each cell are transmitted on the same subframe, if so, the subframe for transmitting the broadcast channel of the cell is used as the subframe for transmitting the broadcast channel of the neighboring cell; otherwise, the subframe of the neighboring cell for transmitting the broadcast channel is calculated by using the time (e.g. how many milliseconds ahead or behind) of the difference between the preconfigured neighboring cell and the subframe of the cell for transmitting the broadcast channel, or the time of the difference between the preconfigured neighboring cell and the subframe of the cell for transmitting the broadcast channel is obtained from the neighboring cell by performing information interaction with the neighboring cell, and the subframe of the neighboring cell for transmitting the broadcast channel is calculated, or the information of the subframe of the neighboring cell for transmitting the broadcast channel is directly obtained from the neighboring cell, where the information is usually the subframe number.
Generally, the information about whether the time for each cell in the network to transmit the broadcast channel is synchronized is configured, but the information about the time difference between the subframes for the neighboring cells and the subframes for the cell to transmit the broadcast channel may or may not be configured.
Similarly, for the synchronous channel, determining whether the time for each cell in the network to send the synchronous channel is synchronous according to the pre-configuration, if so, taking the subframe of the synchronous channel sent by the cell as the subframe of the synchronous channel sent by the adjacent cell; otherwise, the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is calculated by using the pre-configured time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel, or the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is acquired from the adjacent cell, and the sub-frame of the adjacent cell sending the synchronous channel is calculated, or the information of the sub-frame of the adjacent cell sending the synchronous channel is directly acquired from the adjacent cell.
Step 52: and respectively performing the following processing on each determined subframe: and determining the RB corresponding to the RB occupied by the broadcast channel and the synchronous channel of the adjacent cell in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RB to be lower than that of the RBs except the corresponding RB.
For each cell, the central frequency points of the adjacent cells are known, and the broadcast channel and the synchronous channel have the characteristic of fixedly occupying a 1.08MHz frequency band in the middle of the system bandwidth, so that the frequency bands of the RBs occupied by the broadcast channel and the synchronous channel of the adjacent cells can be determined, and the RBs with the same frequency as the determined frequency bands are taken as corresponding RBs. The same frequency refers to complete overlapping or partial overlapping of frequency bands.
Then, the scheduling priority of the corresponding RB is reduced to be lower than that of other RBs, namely, the corresponding RB is scheduled after the other RBs are scheduled; alternatively, the transmit power of the corresponding RB is reduced to be lower than the transmit power of the other RBs, even to 0, i.e., the corresponding RB is not used.
It can be seen that, in this embodiment, the scheduling priority or the transmission power of the RB that may interfere with the broadcast channel and the synchronization channel is reduced, so that the interference with the broadcast channel and the synchronization channel is reduced, and the performance of the broadcast channel and the synchronization channel is improved.
FIG. 6 is a flow chart of a second embodiment of the method of the present invention. As shown in fig. 6, the method comprises the following steps:
step 61: and respectively determining the sub-frames of the adjacent cell for transmitting the broadcast channel and the synchronous channel.
The specific implementation of this step is the same as step 51, and is not described again.
Step 62: and respectively performing the following processing on each determined subframe: determining OFDM symbols corresponding to the OFDM symbols occupied by the broadcast channel and the synchronous channel of the adjacent cell in all the OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of the OFDM symbols except the corresponding OFDM symbols.
The positions of the OFDM symbols occupied by the broadcast channel and the synchronization channel of each cell are the same, that is, the positions of the OFDM symbols occupied by the broadcast channel and the synchronization channel of the neighboring cell are known, so that the OFDM symbols at the same positions are the corresponding OFDM symbols.
Thereafter, the transmission power of the corresponding OFDM symbol may be reduced to be lower than the transmission power of the other OFDM symbols, even to 0.
It can be seen that in this embodiment, the transmission power of the OFDM symbols that may interfere with the broadcast channel and the synchronization channel is reduced more finely, so that the interference with the broadcast channel and the synchronization channel is reduced, and the performance of the broadcast channel and the synchronization channel is improved.
Based on the above description, fig. 7 is a schematic structural diagram of an embodiment of the apparatus of the present invention. As shown in fig. 7, includes:
a first processing unit 71, configured to determine subframes for transmitting a broadcast channel and a synchronization channel in neighboring cells, respectively;
a second processing unit 72, configured to perform the following processing for each determined subframe: and determining the RB corresponding to the RB occupied by the broadcast channel and the synchronous channel of the adjacent cell in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RB to be lower than that of the RBs except the corresponding RB.
The second processing unit 72 may specifically include:
a first processing subunit 721, configured to determine, by using a known center frequency point of the neighboring cell and a characteristic that a broadcast channel and a synchronization channel occupy a 1.08MHz frequency band in the middle of a system bandwidth, a frequency band in which an RB occupied by the broadcast channel and the synchronization channel of the neighboring cell are located, and use an RB having the same frequency as the determined frequency band as a corresponding RB;
a second processing subunit 722, configured to reduce the scheduling priority or the transmission power of the corresponding RB to be lower than the scheduling priority or the transmission power of RBs other than the corresponding RB.
Or,
a first processing unit 71, configured to determine subframes for transmitting a broadcast channel and a synchronization channel in neighboring cells, respectively;
a second processing unit 72, configured to perform the following processing for each determined subframe: determining OFDM symbols corresponding to the OFDM symbols occupied by the broadcast channel and the synchronous channel of the adjacent cell in all the OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of the OFDM symbols except the corresponding OFDM symbols.
The second processing unit 72 may specifically include:
a first processing subunit 721, configured to use the known positions of the OFDM symbols occupied by the broadcast channel and the synchronization channel of the neighboring cell, and use, as corresponding OFDM symbols, OFDM symbols at the same position in all OFDM symbols occupied by the cell;
a second processing subunit 722, configured to reduce the transmit power of the corresponding OFDM symbol to be lower than the transmit power of OFDM symbols other than the corresponding OFDM symbol.
For a specific work flow of the apparatus embodiment shown in fig. 7, please refer to corresponding descriptions in the method embodiments shown in fig. 5 and 6, which are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An interference control method, comprising:
respectively determining subframes of adjacent cells for sending broadcast channels and synchronous channels;
and respectively performing the following processing on each determined subframe: determining RBs corresponding to Resource Blocks (RBs) occupied by broadcast channels and synchronous channels of adjacent cells in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RBs to be lower than that of RBs except the corresponding RBs;
wherein the determining of the subframe of the neighbor cell for transmitting the broadcast channel comprises:
determining whether the time for transmitting the broadcast channel by each cell in the network is synchronous according to the pre-configuration, and if so, taking the subframe for transmitting the broadcast channel by the cell as the subframe for transmitting the broadcast channel by the adjacent cell; if not, utilizing the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel to calculate the subframe of the adjacent cell for sending the broadcast channel, or acquiring the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel from the adjacent cell, and calculating the subframe of the adjacent cell for sending the broadcast channel, or directly acquiring the information of the subframe of the adjacent cell for sending the broadcast channel from the adjacent cell;
the determining the subframe of the neighbor cell for sending the synchronization channel comprises:
determining whether the time for sending the synchronous channel by each cell in the network is synchronous or not according to the pre-configuration, and if so, taking the subframe of sending the synchronous channel by the cell as the subframe of sending the synchronous channel by the adjacent cell; otherwise, the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is calculated by using the pre-configured time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel, or the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is acquired from the adjacent cell, and the sub-frame of the adjacent cell sending the synchronous channel is calculated, or the information of the sub-frame of the adjacent cell sending the synchronous channel is directly acquired from the adjacent cell.
2. The method of claim 1, wherein the determining the RBs corresponding to the RBs occupied by the broadcast channel and the synchronization channel of the neighboring cell in the system bandwidth of the current cell comprises:
and determining frequency bands of RBs occupied by the broadcast channels and the synchronous channels of the adjacent cells by utilizing the known central frequency points of the adjacent cells and the characteristic that the broadcast channels and the synchronous channels occupy a 1.08MHz frequency band in the middle of the system bandwidth, and taking the RBs with the same frequency as the determined frequency bands as corresponding RBs.
3. An interference control method, comprising:
respectively determining subframes of adjacent cells for sending broadcast channels and synchronous channels;
and respectively performing the following processing on each determined subframe: determining OFDM symbols corresponding to OFDM symbols occupied by broadcast channels and synchronous channels of adjacent cells in all OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of OFDM symbols except the corresponding OFDM symbols;
wherein the determining of the subframe of the neighbor cell for transmitting the broadcast channel comprises:
determining whether the time for transmitting the broadcast channel by each cell in the network is synchronous according to the pre-configuration, and if so, taking the subframe for transmitting the broadcast channel by the cell as the subframe for transmitting the broadcast channel by the adjacent cell; if not, utilizing the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel to calculate the subframe of the adjacent cell for sending the broadcast channel, or acquiring the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel from the adjacent cell, and calculating the subframe of the adjacent cell for sending the broadcast channel, or directly acquiring the information of the subframe of the adjacent cell for sending the broadcast channel from the adjacent cell;
the determining the subframe of the neighbor cell for sending the synchronization channel comprises:
determining whether the time for sending the synchronous channel by each cell in the network is synchronous or not according to the pre-configuration, and if so, taking the subframe of sending the synchronous channel by the cell as the subframe of sending the synchronous channel by the adjacent cell; otherwise, the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is calculated by using the pre-configured time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel, or the time difference between the adjacent cell and the sub-frame of the cell sending the synchronous channel is acquired from the adjacent cell, and the sub-frame of the adjacent cell sending the synchronous channel is calculated, or the information of the sub-frame of the adjacent cell sending the synchronous channel is directly acquired from the adjacent cell.
4. The method according to claim 3, wherein the determining the OFDM symbols corresponding to the OFDM symbols occupied by the broadcast channel and the synchronization channel of the neighboring cell in all the OFDM symbols occupied by the cell comprises:
and taking the OFDM symbols at the same position in all the OFDM symbols occupied by the cell as corresponding OFDM symbols by using the known positions of the OFDM symbols occupied by the broadcast channel and the synchronization channel of the adjacent cell.
5. An interference control apparatus, comprising:
the first processing unit is used for respectively determining the subframes of the adjacent cell for sending the broadcast channel and the synchronous channel;
wherein the determining of the subframe of the neighbor cell for transmitting the broadcast channel comprises:
determining whether the time for transmitting the broadcast channel by each cell in the network is synchronous according to the pre-configuration, and if so, taking the subframe for transmitting the broadcast channel by the cell as the subframe for transmitting the broadcast channel by the adjacent cell; if not, utilizing the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel to calculate the subframe of the adjacent cell for sending the broadcast channel, or acquiring the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel from the adjacent cell, and calculating the subframe of the adjacent cell for sending the broadcast channel, or directly acquiring the information of the subframe of the adjacent cell for sending the broadcast channel from the adjacent cell;
the determining the subframe of the neighbor cell for sending the synchronization channel comprises:
determining whether the time for sending the synchronous channel by each cell in the network is synchronous or not according to the pre-configuration, and if so, taking the subframe of sending the synchronous channel by the cell as the subframe of sending the synchronous channel by the adjacent cell; if not, the time difference between the preset adjacent cell and the sub-frame of the cell for sending the synchronous channel is utilized to calculate the sub-frame of the adjacent cell for sending the synchronous channel, or the time difference between the preset adjacent cell and the sub-frame of the cell for sending the synchronous channel is acquired from the adjacent cell, and the sub-frame of the adjacent cell for sending the synchronous channel is calculated, or the information of the sub-frame of the adjacent cell for sending the synchronous channel is directly acquired from the adjacent cell;
a second processing unit, configured to perform the following processing on each determined subframe: and determining the RB corresponding to the resource block RB occupied by the broadcast channel and the synchronous channel of the adjacent cell in the system bandwidth of the cell, and reducing the scheduling priority or the transmitting power of the corresponding RB to be lower than that of the RBs except the corresponding RB.
6. The apparatus of claim 5, wherein the second processing unit comprises:
the first processing subunit is used for determining frequency bands of RBs occupied by the broadcast channels and the synchronous channels of the adjacent cells by utilizing the known central frequency point of the adjacent cells and the characteristic that the broadcast channels and the synchronous channels occupy a 1.08MHz frequency band in the middle of a system bandwidth, and taking the RBs with the same frequency as the determined frequency bands as corresponding RBs;
a second processing subunit, configured to reduce the scheduling priority or the transmission power of the corresponding RB to be lower than the scheduling priority or the transmission power of RBs other than the corresponding RB.
7. An interference control apparatus, comprising:
the first processing unit is used for respectively determining the subframes of the adjacent cell for sending the broadcast channel and the synchronous channel;
wherein the determining of the subframe of the neighbor cell for transmitting the broadcast channel comprises:
determining whether the time for transmitting the broadcast channel by each cell in the network is synchronous according to the pre-configuration, and if so, taking the subframe for transmitting the broadcast channel by the cell as the subframe for transmitting the broadcast channel by the adjacent cell; if not, utilizing the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel to calculate the subframe of the adjacent cell for sending the broadcast channel, or acquiring the time difference between the preset adjacent cell and the subframe of the cell for sending the broadcast channel from the adjacent cell, and calculating the subframe of the adjacent cell for sending the broadcast channel, or directly acquiring the information of the subframe of the adjacent cell for sending the broadcast channel from the adjacent cell;
the determining the subframe of the neighbor cell for sending the synchronization channel comprises:
determining whether the time for sending the synchronous channel by each cell in the network is synchronous or not according to the pre-configuration, and if so, taking the subframe of sending the synchronous channel by the cell as the subframe of sending the synchronous channel by the adjacent cell; if not, the time difference between the preset adjacent cell and the sub-frame of the cell for sending the synchronous channel is utilized to calculate the sub-frame of the adjacent cell for sending the synchronous channel, or the time difference between the preset adjacent cell and the sub-frame of the cell for sending the synchronous channel is acquired from the adjacent cell, and the sub-frame of the adjacent cell for sending the synchronous channel is calculated, or the information of the sub-frame of the adjacent cell for sending the synchronous channel is directly acquired from the adjacent cell;
a second processing unit, configured to perform the following processing on each determined subframe: determining OFDM symbols corresponding to OFDM symbols occupied by broadcast channels and synchronous channels of adjacent cells in all OFDM symbols occupied by the cell, and reducing the transmitting power of the corresponding OFDM symbols to be lower than that of OFDM symbols except the corresponding OFDM symbols.
8. The apparatus of claim 7, wherein the second processing unit comprises:
the first processing subunit is configured to use the known positions of the OFDM symbols occupied by the broadcast channel and the synchronization channel of the neighboring cell, and use, as corresponding OFDM symbols, OFDM symbols at the same position in all OFDM symbols occupied by the cell;
a second processing subunit, configured to reduce the transmit power of the corresponding OFDM symbol to be lower than the transmit power of OFDM symbols other than the corresponding OFDM symbol.
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| CN101841851B (en) * | 2009-03-18 | 2013-06-12 | 电信科学技术研究院 | Method and device for multi-cell data transmission |
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| CN101102140A (en) * | 2007-08-13 | 2008-01-09 | 中兴通讯股份有限公司 | Distributed resource mapping method |
| CN101588590A (en) * | 2008-05-20 | 2009-11-25 | 中国移动通信集团公司 | Method and device for estimating channel quality of uplink data channels |
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