CN108934015B - Different network interference notification and processing method, base station and terminal - Google Patents
Different network interference notification and processing method, base station and terminal Download PDFInfo
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- H—ELECTRICITY
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Abstract
According to the method, the base station and the terminal for notifying and processing the interference of the different network, the transmitting signal frequency band frequency point of the different network is obtained, the different network is a network sharing a frequency band with the different network, and the obtained transmitting signal frequency band frequency point comprises the frequency points of the different network and the shared frequency band of the different network; and then, generating an interference notification message according to the acquired frequency point of the frequency band of the transmitting signal and transmitting the interference notification message to the terminal, so that the terminal can process the different network interference of the shared frequency band according to the interference notification message, and the demodulation performance of the channel is prevented from being reduced. The base station can acquire the transmitting signal frequency band point of the different network and inform the terminal so that the terminal can process the different network interference, thereby eliminating the different network interference and ensuring and improving the communication quality.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method, a base station, and a terminal for notifying and processing interference of a different network.
Background
With the development of wireless communication technology, efficient use of limited network spectrum has become a problem for wireless communication. The network spectrum sharing is the application for realizing the sharing spectrum allocation between the operator A and the different operators B. Network sharing presents problems, however, primarily referring to the interference of two networks. Currently, LTE (Long Term Evolution ) networks also have applications for network band sharing, such as LTE and GSM (Global System for Mobile Communication, global system for mobile communications) networks. GSM is mainly voice communication and is a high-priority network; LTE is primarily data communication. In the process of sharing frequency bands by GL (GSM & LTE), when the GSM and the LTE have overlapping frequency bands, the GSM can cause interference to the LTE and influence the communication quality of the LTE.
The bandwidths of the existing LTE are various, and the scene of sharing the frequency band by the different network and the LTE is as follows: the heterogeneous network shares partial band resources in the LTE left and right bands. Such sharing may be single-sided or double-sided with respect to LTE systems. And is shared from both sides of the band toward the center band. However, in order to ensure the communication quality of the two systems in the shared frequency band, there is also a limitation in the proportion of the shared frequency band, for example, not more than 10% of the bandwidth of the LTE system. When the LTE shared band network schedules at the base station side, the LTE system avoids the interference band of the different network as much as possible to schedule, but for some channels and signals which must be transmitted in full bandwidth, the interference scheduling cannot be avoided, so that the interference has an influence on the transmission and the reception of the channels. For example, the transmission of the cell reference signal is full bandwidth, so that for a downlink channel (such as a downlink service channel without beamforming) demodulated by the cell reference signal, the demodulation performance of the channel is reduced due to the interference of the heterogeneous network. Therefore, solving the heterogeneous network interference in network spectrum sharing is a technical problem which needs to be solved urgently at present.
Disclosure of Invention
The embodiment of the invention provides a different network interference notification and processing method, a base station and a terminal, which mainly solve the technical problems that: the method solves the problem of heterogeneous network interference in network spectrum sharing.
In order to solve the above technical problems, an embodiment of the present invention provides a method for notifying heterogeneous network interference, including:
acquiring a transmitting signal frequency band frequency point of a different network, wherein the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network;
generating an interference notification message according to the acquired frequency points of the transmitting signal frequency band;
and transmitting the interference notification message to a terminal.
The embodiment of the invention also provides a method for processing the interference of the different networks, which comprises the following steps:
receiving an interference notification message from a base station, wherein the interference notification message is generated by the base station based on an acquired transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network;
and processing the different network interference of the shared frequency band according to the interference notification message.
The embodiment of the invention also provides a base station, which comprises:
the system comprises a frequency point information acquisition module, a frequency point information acquisition module and a data processing module, wherein the frequency point information acquisition module is used for acquiring a transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the different network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the different network;
the interference information generation module is used for generating an interference notification message according to the acquired frequency points of the transmitting signal frequency band;
and the information sending module is used for sending the interference notification message to the terminal.
The embodiment of the invention also provides a terminal, which comprises:
the information receiving module is used for receiving an interference notification message from a base station, wherein the interference notification message is generated by the base station based on an acquired transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network;
and the interference processing module is used for processing the different network interference of the shared frequency band according to the interference notification message.
The embodiment of the invention also provides a computer storage medium, wherein the computer storage medium stores computer executable instructions for executing the method for notifying the interference of the different network or the method for processing the interference of the different network.
The beneficial effects of the invention are as follows:
according to the method, the base station and the terminal for notifying and processing the interference of the different network, which are provided by the embodiment of the invention, the frequency point of the transmitting signal frequency band of the different network is obtained, the different network is a network sharing the frequency band with the network, and the obtained frequency point of the transmitting signal frequency band comprises the frequency points of the different network and the sharing frequency band of the network; and then, generating an interference notification message according to the acquired frequency point of the frequency band of the transmitting signal and transmitting the interference notification message to the terminal, so that the terminal can process the different network interference of the shared frequency band according to the interference notification message, and the demodulation performance of the channel is prevented from being reduced. The base station can acquire the transmitting signal frequency band point of the different network and inform the terminal so that the terminal can process the different network interference, thereby eliminating the different network interference and ensuring and improving the communication quality.
Drawings
Fig. 1 is a schematic flow chart of a method for notifying interference of different networks according to a first embodiment of the present invention;
fig. 2 is a schematic flow chart of generating an interference notification message according to a first embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for processing interference of a different network according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a base station structure according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a terminal structure according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a GL unilateral shared bandwidth communication model under 20M according to a third embodiment of the present invention;
fig. 7 is a schematic diagram of a 20M lower GL bilateral sharing bandwidth communication model according to a third embodiment of the present invention;
fig. 8 is a schematic diagram of a GL bilateral-shared-bandwidth communication model under 10M according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the embodiments of the present invention is given with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
the embodiment provides a method for notifying heterogeneous network interference, which is shown in fig. 1, and includes:
s101: and acquiring the frequency band point of the transmitting signal of the different network.
The different network in this embodiment refers to a network sharing a frequency band with the present network, and the frequency points of the frequency bands of the transmission signal include the frequency points of the frequency bands shared by the different network and the present network. For example, if the network is an LTE network and the network sharing the network spectrum with the LTE network is a GSM network, the GSM network is a heterogeneous network. The LTE base station acquires a transmitting signal frequency band point of the GSM network.
In this embodiment, a management network element may be added on the basis of the existing technology, where the management network element is disposed between the LTE network and the GSM network, and the management network element may store information of a frequency point of a transmission signal frequency band of the GSM network, and a base station of the LTE network may extract the frequency point of the transmission signal frequency band of the GSM network from the management network element. Otherwise, the management network element can also store the frequency point of the transmitting signal frequency band of the LTE network, and the base station of the GSM network can also extract the frequency point of the transmitting signal frequency band of the LTE network from the management network element.
S102: and generating an interference notification message according to the acquired frequency points of the transmitting signal frequency band.
The manner in which the interference notification message is generated in this step is shown with reference to fig. 2, which includes:
s201: and calculating an index of the acquired transmitting signal frequency band frequency point of the different network relative to a shared Resource Block (RB) of the bandwidth of the network.
S202: and generating an interference notification message according to the calculated index of the shared resource block.
S103: and the generated interference notification message is issued to the terminal so that the terminal can process the heterogeneous network interference of the shared frequency band.
In this embodiment, the base station of the present network may issue the generated interference notification message to the terminal through various messages of the downlink channel, or may generate a new message format for issue to the terminal. And the mode of issuing the mobile terminal to the terminal can adopt a broadcast communication mode or a unicast communication mode.
For example, when the network is an LTE network, the LTE base station may be placed in the original bits of the PBCH channel of LTE through the bit information field SharedBand carried in the LTE physical downlink broadcast channel (Physical Broadcast Channel, PBCH), so as to complete transmission of shared band information, that is, transmission of the interference notification message.
In one example, the interference notification message in this embodiment may be a master information block (Master Information Block, MIB) message. In this example, generating the interference notification message from the calculated index of the shared resource block includes:
and converting the calculated index of the shared resource block into idle bits of the main information block message to generate an interference notification message.
In this embodiment, the MIB message includes an idle bit, where the idle bit includes an offset indication bit and an overlapping resource block number representation bit; converting the index of the shared resource block into the idle bit of the main information block message at this time includes:
determining offset values of the shared resource block and the corresponding resource block according to the calculated index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an offset indication bit according to the offset values;
and determining the number of the overlapped resource blocks according to the calculated index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks.
In this embodiment, considering the limit of the number of idle bits contained in the MIB message, in order to be more flexible and characterize more resource block numbers, in this embodiment, the overlapping resource block number characterization bits are set to include a fixed number characterization bit and a dynamic number characterization bit; the idle bits also comprise number indication bits for indicating the number of resource blocks represented by the dynamic number representation bits; at this time, setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks includes:
and setting the values of the fixed number representation bit, the number indication bit and the dynamic number representation bit according to the number of the overlapped resource blocks.
The following is an illustration in a MIB message format, in particular:
1) The defined MIB (Master Information Block) message in the LTE standard protocol carries the system parameters of LTE, corresponding to the transmission on the downlink PBCH channel. The MIB message body is 24 bits in total. The specific information is as follows:
wherein:
dl-Bandwidth is 3bits for representing downlink Bandwidth information, and n6, n15, n25, n50, n75, n100 represent downlink 1.4,3,5, 10, 15, 20M bandwidths (including 6, 15, 25, 50, 75, 100RB, respectively);
PHICH-Config is 3bits, which is used to represent the duration PHICH duration (including both normal duration and extended duration, and indicated by 1 bit) and the size PHICH size (including configuration values of 1/6,1/2,1,2, and indicated by 2 bits);
the systemFrameNumber is 8bits and is used for representing a system frame number;
spare is the remaining idle 10 bits.
2) The shared band domain of the spare domain which is carried in the existing MIB information of the LTE is defined by fully utilizing the spare domain of the MIB, and the shared band information, namely the heterogeneous network interference band information, is carried in the original bit of the PBCH channel of the LTE to be transmitted.
The shared band information SharedBand field includes two information fields, namely a bitmap and shift. Wherein:
shift indicates the shift of the shared band resource block, and the number of RBs indicated by the bitmap in the middle of the shared band indicates that the shared band occupies 2 bits. In particular, the method comprises the steps of,
the first bit (i.e. offset indication bit) indicates the number of offset RBs of the shared band RB with respect to LTE0# RBs (RBs of LTE starting from 0, 0# RB being the first RB), and a value of 0 indicates no offset, i.e. the shared band starting RB is aligned with LTE0# RBs; a value of 1 indicates that there is an offset, and the specific offset RB amount can be defined according to practical applications;
the second bit (i.e. the number indication bit) indicates the RB number indication indicated by a certain bit or bits (e.g. the middle bit) of the bitmap, e.g. a value of 0 indicates the middle one bit bitmap indicates N consecutive RBs and a value of 1 indicates the middle one bit bitmap indicates M consecutive RBs;
bitmap represents the mapping condition of continuous Q RBs of left and right shared frequency bands, and occupies 8 bits;
-wherein the first 3bits (fixed number of characterizing bits) and the last 3bits (fixed number of characterizing bits), each bit representing a succession of K RB index indications;
-the middle 2bits (dynamic number characterization bits) represent the left and right F consecutive RB index indications, respectively;
to sum up, the first 4bits represent consecutive L RB index indications of the left band, and the last 4bits represent consecutive S RB index indications of the right band.
The overall MIB message body is defined in LTE band-shared network applications as follows:
in addition, when the interference band information is changed, the corresponding MIB message is also changed. The change of the general interference message is of the order of seconds, and the MIB message is transmitted in a period of 40 ms.
Based on the MIB message format, the LTE terminal and the LTE base station complete downlink synchronization, detect the PBCH channel, acquire system information and acquire shared frequency band information. Acquiring different network sharing frequency band information by analyzing a 10bit SharedBand domain of the detected PBCH; and the LTE terminal can eliminate the interference of the different networks according to the acquired shared frequency band information of the different networks. That is, the method for processing the heterogeneous network interference at the terminal side at this time, as shown in fig. 3, includes:
s301: an interference notification message is received from a base station.
The interference notification message is generated by the base station based on the acquired frequency point of the frequency band of the transmitting signal of the different network, wherein the different network is a network sharing the frequency band with the network, and the frequency point of the frequency band of the transmitting signal comprises the frequency point of the frequency band shared by the different network and the network;
s302: and processing the different network interference of the shared frequency band according to the acquired interference notification message. In this embodiment, after the terminal side obtains the interference notification message, the terminal side may perform corresponding analysis on the interference notification message to obtain corresponding shared resource block information, so as to perform interference processing.
When the terminal side in this embodiment performs interference processing, it may perform 0 setting processing on data on an interference frequency point, or may set an estimated value of an interference frequency point by using an estimated value of an adjacent frequency point of the interference frequency point, so as to reduce setting and eliminate interference of different networks as much as possible.
The method for notifying and eliminating the interference of the different network provided by the embodiment is suitable for networks with various shared frequency bands, including but not limited to an LTE network, a GSM network and the like. And the bit information domain carried in the LTE downlink broadcast channel can be specifically defined, and the downlink broadcast channel is transmitted, so that the terminal can acquire the frequency band information of the different network in the frequency band sharing during the process of receiving and detecting the downlink physical broadcast channel, thereby suppressing the frequency band of the different network interference and ensuring the demodulation performance of the LTE downlink physical channel. And the spare bits of the existing broadcast channel information of the LTE can be used for carrying the frequency band information of the heterogeneous network in the frequency band sharing, on the basis of not changing the existing LTE network, the LTE terminal normally receives signals, acquires the shared frequency band information through detection and analysis of the broadcast information, eliminates the influence of the heterogeneous network on the LTE in the transmission process, and ensures the downlink communication quality of the LTE in the shared frequency band. Thereby achieving efficient and reliable spectrum sharing network communication.
Embodiment two:
the present embodiment provides a base station, as shown in fig. 4, including:
the frequency point information obtaining module 41 is configured to obtain a frequency point of a transmission signal frequency band of the different network.
The different network in this embodiment refers to a network sharing a frequency band with the present network, and the frequency points of the frequency bands of the transmission signal include the frequency points of the frequency bands shared by the different network and the present network. For example, if the network is an LTE network and the network sharing the network spectrum with the LTE network is a GSM network, the GSM network is a heterogeneous network. The LTE base station acquires a transmitting signal frequency band point of the GSM network.
In this embodiment, a management network element may be added on the basis of the existing technology, where the management network element is disposed between the LTE network and the GSM network, the management network element may store the information of the frequency point of the transmission signal frequency band of the GSM network, and the frequency point information obtaining module 41 of the LTE network base station may extract the frequency point of the transmission signal frequency band of the GSM network from the management network element. Otherwise, the management network element can also store the frequency point of the transmitting signal frequency band of the LTE network, and the base station of the GSM network can also extract the frequency point of the transmitting signal frequency band of the LTE network from the management network element.
The interference information generating module 42 is configured to generate an interference notification message according to the acquired frequency point of the transmission signal frequency band.
And the information sending module 43 is configured to send the interference notification message to a terminal, so that the terminal processes the heterogeneous network interference of the shared frequency band. The information sending module 43 may send the generated interference notification message to the terminal through various messages of the downlink channel, or may generate a new message format for sending to the terminal. And the mode of issuing the mobile terminal to the terminal can adopt a broadcast communication mode or a unicast communication mode.
For example, when the network is an LTE network, the information sending module 43 of the LTE base station may be placed in the original bits of the PBCH channel of LTE through the bit information field SharedBand carried in the LTE physical downlink broadcast channel (Physical Broadcast Channel, PBCH), so as to complete the transmission of shared band information, that is, the transmission of the interference notification message.
The interference information generating module 42 in the present embodiment includes a calculating unit 421 and an information generating unit 422;
the calculating unit 421 is configured to calculate an index of the acquired transmitting signal frequency band frequency point of the heterogeneous network relative to the shared resource block of the bandwidth of the local network;
the information generating unit 422 is configured to generate an interference notification message according to the calculated index of the shared resource block.
The interference notification message in this embodiment may be a main information block message; the information generating unit 422 is configured to convert the index of the shared resource block into a spare bit of the main information block message to generate an interference notification message.
In this embodiment, the MIB message includes an idle bit, where the idle bit includes an offset indication bit and an overlapping resource block number representation bit; the information generating unit 422 then converts the index of the shared resource block into the spare bit of the main information block message, including:
determining offset values of the shared resource block and the corresponding resource block according to the calculated index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an offset indication bit according to the offset values;
and determining the number of the overlapped resource blocks according to the calculated index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks.
In this embodiment, considering the limit of the number of idle bits contained in the MIB message, in order to be more flexible and characterize more resource block numbers, in this embodiment, the overlapping resource block number characterization bits are set to include a fixed number characterization bit and a dynamic number characterization bit; the idle bits also comprise number indication bits for indicating the number of resource blocks represented by the dynamic number representation bits; at this time, setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks includes:
and setting the values of the fixed number representation bit, the number indication bit and the dynamic number representation bit according to the number of the overlapped resource blocks.
The following is an illustration in a MIB message format, in particular:
the defined MIB (Master Information Block) message in the LTE standard protocol carries the system parameters of LTE, corresponding to the transmission on the downlink PBCH channel. The MIB message body is 24 bits in total. The specific information is as follows:
the spark is the remaining idle 10 bits.
The information generating unit 422 may fully use the spark domain of the MIB, define the shared band information SharedBand domain of the spark domain that is idle in the existing MIB message of LTE, and carry the shared band information, i.e. the heterogeneous network interference band information, in the PBCH channel original bits of LTE for transmission.
The shared band information SharedBand field includes two information fields, namely a bitmap and shift. Wherein:
shift indicates the shift of the shared band resource block, and the number of RBs indicated by the bitmap in the middle of the shared band indicates that the shared band occupies 2 bits. In particular, the method comprises the steps of,
the first bit (i.e. offset indication bit) indicates the number of offset RBs of the shared band RB with respect to LTE0# RBs (RBs of LTE starting from 0, 0# RB being the first RB), and a value of 0 indicates no offset, i.e. the shared band starting RB is aligned with LTE0# RBs; a value of 1 indicates that there is an offset, and the specific offset RB amount can be defined according to practical applications;
the second bit (i.e. the number indication bit) indicates the RB number indication indicated by a certain bit or bits (e.g. the middle bit) of the bitmap, e.g. a value of 0 indicates the middle one bit bitmap indicates N consecutive RBs and a value of 1 indicates the middle one bit bitmap indicates M consecutive RBs;
bitmap represents the mapping condition of continuous Q RBs of left and right shared frequency bands, and occupies 8 bits;
-wherein the first 3bits (fixed number of characterizing bits) and the last 3bits (fixed number of characterizing bits), each bit representing a succession of K RB index indications;
-the middle 2bits (dynamic number characterization bits) represent the left and right F consecutive RB index indications, respectively;
to sum up, the first 4bits represent consecutive L RB index indications of the left band, and the last 4bits represent consecutive S RB index indications of the right band.
The overall MIB message body is defined in LTE band-shared network applications as follows:
in addition, when the interference band information is changed, the corresponding MIB message is also changed. The change of the general interference message is of the order of seconds, and the MIB message is transmitted in a period of 40 ms.
Based on the MIB message format, the LTE terminal and the LTE base station complete downlink synchronization, detect the PBCH channel, acquire system information and acquire shared frequency band information. And acquiring the information of the different network shared frequency bands by analyzing the 10bit SharedBand domain of the detected PBCH. And the LTE terminal can eliminate the interference of the different networks according to the acquired shared frequency band information of the different networks.
Referring to fig. 5, the terminal in this embodiment includes:
the information receiving module 51 is configured to receive an interference notification message from a base station, where the interference notification message is generated by the base station based on an acquired transmission signal frequency band frequency point of a different network, and the different network is a network sharing a frequency band with the present network, and the transmission signal frequency band frequency point includes a frequency point of a shared frequency band of the different network and the present network.
The interference processing module 52 is configured to process the heterogeneous network interference of the shared frequency band according to the interference notification message. When the interference processing module 52 performs interference processing, it may perform 0 setting processing on data on the interference frequency points, or may set an estimated value of the interference frequency point by using an estimated value of an adjacent frequency point of the interference frequency point, so as to reduce setting and eliminate interference of different networks as much as possible. It should be understood that the interference processing module 52 in this embodiment is not limited to the above-described exemplary interference processing method when performing the heterogeneous network interference processing.
The shared frequency point information of the different network can be obtained between the terminal and the base station on the basis of not changing the existing protocol, and then the terminal performs interference processing of the different network according to the shared frequency point information obtained from the base station when needed, so that efficient and reliable spectrum sharing network communication is completed.
Embodiment III:
for a better understanding of the present invention, the present embodiment is described with a focus on specific application examples.
Example 1:
let the shared band network of GSM and LTE, here assume that the downlink communication scenario is: LTE is 20M system bandwidth. GSM has 3 paths of voice, each path occupies 200kHz frequency band, and GL unilaterally shares bandwidth communication model under 20M shown in figure 6 at the left side frequency band of LTE.
The first step, a frequency point information acquisition module. The LTE base station side obtains the information of the frequency band and the frequency point of the transmitting signal of the GSM network through a network element at the network side, and the information is respectively: LTE center frequency point 1835MHz; the GSM has 3 paths, and the corresponding frequency bands are respectively: 1827-1827.2, 1827.4-1827.6, 1827.8-1828 MHz.
And secondly, a resource block index calculation module. And the LTE base station side calculates and acquires an RB (Resource Block) index of a GSM network transmitting signal frequency band frequency point relative to the LTE bandwidth through a GSM network frequency band calculation module. In particular, the method comprises the steps of,
the LTE center frequency point 1835MHz corresponds to the effective data transmission frequency band of 1827-1844 MHz;
GSM is 3 paths altogether, and corresponding frequency bands are respectively: 1827-1827.2 MHz, 1827.4-1827.6 MHz, 1827.8-1828 MHz. Therefore, the RB index for LTE is: 0-1 #, 2-3 #, 4-5 # RB.
And thirdly, sharing the frequency band information transmitting module. And (3) putting the RB index obtained in the step into the original bit of the PBCH channel of the LTE for transmission through the bit information field SharedBand carried in the downlink broadcast channel of the LTE.
Specifically, the SharedBand comprises two parts of domain information, namely bitmap and shift;
the bits are 8bits in total, each bit represents 2RB, the first 4bits represent LTE 0-7#RB, and the last 4bits represent LTE 92-99#RB. So in this embodiment, bitmap is [ 11 100 00 0];
shift is 2bits in total, the value [ 00 ] indicates no offset, and the middle bitmap is defined as 3RB.
The GSM shared band information is processed, and the original bit defined by the LTE protocol is also processed. The following are provided:
dl-bandwidth= [ 10 ]; PHICH-config= [ 00 ]; systemframenumber= [ 00 00 00 00 ]. Therefore, the PBCH message is [ 11 00 00 00 00 00 00 01 11 00 00 0].
Fourth, the frequency band information receiving module is shared. The LTE terminal completes downlink synchronization, detects a PBCH channel, acquires a SharedBand domain, and analyzes the SharedBand domain to acquire different network sharing frequency band information;
and fifthly, an interference processing module. And the LTE terminal eliminates interference of the different network according to the different network frequency band information. Specifically, the cancellation may be a correction of the channel estimation (for example, the estimation value of the adjacent frequency point of the interference frequency point is used to set the estimation value of the interference frequency point), that is, the interference information has an effect on the channel estimation, and the interference part is cancelled to reduce the effect on the channel estimation.
Example 2:
let the shared band network of GSM and LTE, here assume that the downlink communication scenario is: LTE is 20M system bandwidth. GSM has 4 voice channels, each channel occupies 200kHz band, and in the left and right bands of LTE, see the 20M bilateral shared bandwidth communication model shown in fig. 7.
The first step, a frequency point information acquisition module. The LTE base station side obtains the information of the frequency band and the frequency point of the transmitting signal of the GSM network through a network element at the network side, and the information is respectively: LTE center frequency point 1835MHz; GSM has 2 paths, corresponding frequency bands are respectively: 1827.4-1827.6 MHz and 1843.8-1843.6 MHz.
And secondly, a resource block index calculation module. And the LTE base station side calculates and acquires an RB (Resource Block) index of a GSM network transmitting signal frequency band frequency point relative to the LTE bandwidth through a GSM network frequency band calculation module. In particular, the method comprises the steps of,
the LTE center frequency point 1835MHz corresponds to the effective data transmission frequency band of 1827-1844 MHz;
GSM totally 2 paths, the corresponding frequency bands are respectively: 1827.4-1827.6 MHz and 1843.8-1843.6 MHz. Therefore, the RB index for LTE is: 2-3 # and 96-97 # RB.
And thirdly, sharing the frequency band information transmitting module. And (3) putting the RB index obtained in the step into the original bit of the PBCH channel of the LTE for transmission through the bit information field SharedBand carried in the downlink broadcast channel of the LTE.
Specifically, the SharedBand comprises two parts of domain information, namely bitmap and shift;
the bits are 8bits in total, each bit represents 2RB, the first 4bits represent LTE 0-7#RB, and the last 4bits represent LTE 92-99#RB. So in this embodiment, bitmap is [ 01 00 00 10 ];
shift is 2bits in total, the value [ 00 ] indicates no offset, and the middle bitmap is defined as 3RB.
The GSM shared band information is processed, and the original bit defined by the LTE protocol is also processed. The following are provided:
dl-bandwidth= [ 10 ]; PHICH-config= [ 00 ]; systemframenumber= [ 00 00 00 00 ]. Therefore, the PBCH message is [ 11 00 00 00 00 00 00 00 100 00 10 ].
Fourth, the frequency band information transmitting module is shared. The LTE terminal completes downlink synchronization, detects a PBCH channel, acquires a SharedBand domain, and analyzes the SharedBand domain to acquire different network sharing frequency band information;
and fifthly, an interference processing module. And the LTE terminal eliminates interference of the different network according to the different network frequency band information. Specifically, cancellation may be correction of channel estimation, that is, interference information has an effect on channel estimation, and interference is partially cancelled to reduce the effect on channel estimation.
Example 3:
let the shared band network of GSM and LTE, here assume that the downlink communication scenario is: LTE is a 10M system bandwidth. GSM has 2 voice channels, each occupying 200kHz band, and in the left band of LTE, see the 10M bilateral shared bandwidth communication model shown in fig. 8.
The first step, a frequency point information acquisition module. The LTE base station side obtains the information of the frequency band and the frequency point of the transmitting signal of the GSM network through a network element at the network side, and the information is respectively: LTE center frequency point 1835MHz; the GSM has 3 paths, and the corresponding frequency bands are respectively: 1830.5-1830.7 MHz and 1830.9-1831.1.
And secondly, a resource block index calculation module. And the LTE base station side calculates and acquires an RB (Resource Block) index of a GSM network transmitting signal frequency band frequency point relative to the LTE bandwidth through a GSM network frequency band calculation module. In particular, the method comprises the steps of,
the LTE center frequency point 1835MHz corresponds to the effective data transmission frequency band of 1830.5-1839.5 MHz;
GSM totally 2 paths, the corresponding frequency bands are respectively: 11830.5-1830.7 MHz and 1830.9-1831.1. Therefore, the RB index for LTE is: 0-1 # and 2-3 # RB.
And thirdly, sharing the frequency band information transmitting module. And (3) putting the RB index obtained in the step into the original bit of the PBCH channel of the LTE for transmission through the bit information field SharedBand carried in the downlink broadcast channel of the LTE.
Specifically, the SharedBand comprises two parts of domain information, namely bitmap and shift;
the bits are 8bits in total, each bit represents 2RB, the first 4bits represent LTE 0-7#RB, and the last 4bits represent LTE 42-49#RB. So in this embodiment, bitmap is [ 11 00 00 00 ];
shift is 2bits in total, the value [ 00 ] indicates no offset, and the middle bitmap is defined as representing 2RB.
The GSM shared band information is processed, and the original bit defined by the LTE protocol is also processed. The following are provided:
dl-bandwidth= [ 10 ]; PHICH-config= [ 00 ]; systemframenumber= [ 00 00 00 00 ]. Therefore, the PBCH message is [ 11 00 00 00 00 00 00 01 100 00 00 ].
Fourth, the frequency band information receiving module is shared. The LTE terminal completes downlink synchronization, detects a PBCH channel, acquires a SharedBand domain, and analyzes the SharedBand domain to acquire different network sharing frequency band information;
and fifthly, an interference processing module. And the LTE terminal eliminates interference of the different network according to the different network frequency band information. Specifically, cancellation may be correction of channel estimation, that is, interference information has an effect on channel estimation, and interference is partially cancelled to reduce the effect on channel estimation.
Therefore, the method and the device can restrain the frequency band of the different network interference by defining the bit information domain borne in the LTE downlink broadcast channel and transmitting the downlink broadcast channel, so that the terminal can acquire the frequency band information of the different network in the frequency band sharing in the process of receiving and detecting the downlink physical broadcast channel, thereby ensuring the demodulation performance of the LTE downlink physical channel. In summary, the method of the invention uses spare bits of the existing broadcast channel information of the LTE to carry the frequency band information of the heterogeneous network in the frequency band sharing, and on the basis of not changing the existing LTE network, the LTE terminal normally receives signals, acquires the shared frequency band information through detection and analysis of the broadcast information, eliminates the influence of the heterogeneous network on the LTE in the transmission process, and ensures the downlink communication quality of the LTE in the shared frequency band. Thereby achieving efficient and reliable spectrum sharing network communication.
The foregoing is a further detailed description of embodiments of the invention in connection with the specific embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (5)
1. A heterogeneous network interference notification method, comprising:
acquiring a transmitting signal frequency band frequency point of a different network, wherein the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network;
calculating the index of the obtained transmitting signal frequency band frequency point of the different network relative to the shared resource block of the bandwidth of the network;
converting the index of the shared resource block into idle bits of a main information block message to generate an interference notification message; the interference notification message is a main information block message; the idle bits comprise offset indication bits and overlapping resource block number representation bits;
the interference notification message is issued to the terminal;
wherein converting the index of the shared resource block into the idle bit of the master information block message comprises:
determining offset values of the shared resource block and the index of the corresponding resource block of the network according to the index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an offset indication bit according to the offset value;
and determining the number of the overlapped resource blocks according to the index of the shared resource blocks and the index of the corresponding resource blocks of the network, and setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks.
2. The heterogeneous network interference notification method of claim 1, wherein the overlapping resource block number characterization bits comprise fixed number characterization bits and dynamic number characterization bits; the idle bit also comprises a number indication bit used for indicating the number of the resource blocks represented by the dynamic number representation bit;
setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks comprises:
and setting the values of the fixed number representation bit, the number indication bit and the dynamic number representation bit according to the number of the overlapped resource blocks.
3. A method for heterogeneous network interference processing, comprising:
receiving an interference notification message from a base station, wherein the interference notification message is generated by the base station based on an acquired transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network; the base station generates the interference notification message by the following method: calculating the index of the obtained transmitting signal frequency band point of the different network relative to the shared resource block of the bandwidth of the network, and converting the index of the shared resource block into idle bits of a main information block message to generate an interference notification message; the interference notification message is a main information block message, and the idle bit comprises an offset indication bit and an overlapped resource block number representation bit; converting the index of the shared resource block into the spare bit of the master information block message includes: determining offset values of the shared resource block and the index of the corresponding resource block of the network according to the index of the shared resource block and the index of the corresponding resource block of the network, setting the value of an offset indication bit according to the offset value, determining the number of overlapped resource blocks according to the index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an overlapped resource block number representation bit according to the number of the overlapped resource blocks;
and processing the different network interference of the shared frequency band according to the interference notification message.
4. A base station, comprising:
the system comprises a frequency point information acquisition module, a frequency point information acquisition module and a data processing module, wherein the frequency point information acquisition module is used for acquiring a transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the different network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the different network;
the interference information generation module is used for generating an interference notification message according to the acquired frequency points of the transmitting signal frequency band;
the information sending module is used for sending the interference notification message to the terminal;
the interference information generation module comprises a calculation unit and an information generation unit;
the calculating unit is used for calculating the index of the obtained transmitting signal frequency band frequency point of the different network relative to the shared resource block of the network bandwidth;
the information generating unit is used for converting the index of the shared resource block into idle bits of a main information block message to generate an interference notification message; the interference notification message is a main information block message; the idle bits comprise offset indication bits and overlapping resource block number representation bits;
the information generation unit is used for:
determining offset values of the shared resource block and the index of the corresponding resource block of the network according to the index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an offset indication bit according to the offset value;
and determining the number of the overlapped resource blocks according to the index of the shared resource blocks and the index of the corresponding resource blocks of the network, and setting the value of the representation bit of the number of the overlapped resource blocks according to the number of the overlapped resource blocks.
5. A terminal, comprising:
the information receiving module is used for receiving an interference notification message from a base station, wherein the interference notification message is generated by the base station based on an acquired transmitting signal frequency band frequency point of a different network, the different network is a network sharing a frequency band with the network, and the transmitting signal frequency band frequency point comprises a frequency point of the frequency band shared by the different network and the network; the base station generates the interference notification message by the following method: calculating the index of the obtained transmitting signal frequency band point of the different network relative to the shared resource block of the bandwidth of the network, and converting the index of the shared resource block into idle bits of a main information block message to generate an interference notification message; the interference notification message is a main information block message, and the idle bit comprises an offset indication bit and an overlapped resource block number representation bit; converting the index of the shared resource block into the spare bit of the master information block message includes: determining offset values of the shared resource block and the index of the corresponding resource block of the network according to the index of the shared resource block and the index of the corresponding resource block of the network, setting the value of an offset indication bit according to the offset value, determining the number of overlapped resource blocks according to the index of the shared resource block and the index of the corresponding resource block of the network, and setting the value of an overlapped resource block number representation bit according to the number of the overlapped resource blocks;
and the interference processing module is used for processing the different network interference of the shared frequency band according to the interference notification message.
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