[0001]The present invention relates to a method and apparatus for controlling access to the spectrum, and more particularly, spectrum access interference alignment method relates to precoding techniques and using apparatus based on this method.
Background technique
[0002]With the rapid development of information technology and multi-service wireless networks, the demand for wireless broadband services continues to increase, the spectrum of this non-renewable resources are becoming increasingly scarce. However, the existing fixed spectrum allocation policy has led to a number of spectrum assigned to authorized users in certain period of time but in an idle state, the lower spectrum efficiency, there is a large spectrum of waste. Emergence of cognitive radio (CR) technology to improve the spectrum efficiency, ease the shortage of spectrum resources, and thus become the research focus in the field of wireless communications.
[0003]
Premise equipment using cognitive radio technology (will be referred to herein as "second apparatus") does not affect the authorized user equipment (referred to herein as "master") of the normal communication, the user equipment access authorization opportunistic idle band, dynamic spectrum access, thereby improving spectrum utilization.
[0004]
Although the introduction of cognitive radio technology can improve the tense spectrum resources, but a lot of times idle band device access to the main device, can cause interference problems, and frequent network status change significantly between users. Cognitive conventional multiple input multiple output (MIMO) information exchange system often requires joint cognitive information exchange system user equipment and a base station, when the number of user equipments is increased, the efficiency of information exchange will be greatly reduced.
[0005]
In addition, also we need to consider the secondary device with different priorities (or quality of service QoS level) situation.
[0006]
SUMMARY
[0007]
To solve the above problems, the present invention provides a method of interference alignment precoding techniques controls access to the master device based on an idle frequency band and an apparatus using the method.
[0008]
According to one aspect of the present invention, there is provided a spectrum management apparatus, comprising one or more processors, the one or more processors are configured to: determine one or more secondary devices each secondary device location information and antenna angle information; idle times in response to a request for access to the master device spectrum, according to each position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; allow access to each of the current service base station apparatus all of the secondary devices to allow access to the secondary device location information and antenna angle information for the serving base station interference alignment precoding.
[0009]
According to another aspect of the present invention, there is provided a method of controlling access to a communication system frequency spectrum, comprising: determining position information and antenna angle information about one or more secondary devices each secondary device; secondary device in response to contact White idle spectrum request apparatus, the position information and antenna angle information of each of the slave device determines to allow access to the secondary device WS; and to allow the secondary device the access times in each service device base station provides all the secondary devices allowed to access the location information and antenna angle information for the serving base station interference alignment precoding.
[0010]
According to another aspect of the present invention, there is provided a method for spectrum access communication system, the communication system comprises a spectrum management device, the one or more host devices, and a device or a plurality of times the method comprising: idle time response to a request to access the master device spectrum, the spectrum management apparatus according to each position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; the spectrum management device to serving base station allowed to access each secondary device notifies all device allows access to the secondary position information and antenna angle information; and the serving base station using the notified position information and antenna angle information about the actual transmission signal interference alignment precoding, serves to transmit to allow the secondary device access.
BRIEF DESCRIPTION
[0011]
Brief description given to a better understanding of the present invention can be incorporated by reference to the following, in which the same or similar reference numerals in the drawings to refer to the same or like parts. Drawings, together with the following detailed description of the present specification comprises a part of this specification and forming, and serve to further illustrate and explain the principles of the embodiments and advantages of the present invention is preferably present invention. In the drawings:
[0012]
1A and 1B schematically shows a flowchart of the idle band access procedure according to the present invention, the secondary device;
[0013]
FIG 2 is a first embodiment of a process flow chart for determining coordinator spectrum band idle secondary device accessible;
[0014]
FIG 3 is determined by the spectrum according to a second embodiment coordinator flowchart of the processing equipment idle time band accessible;
[0015]
FIG 4 shows a functional block diagram of the present invention, the spectrum coordinator; and
[0016]
FIG 5 is a block diagram illustrating an example of a computer hardware configuration.
detailed description
[0017]
1A and 1B show a flowchart of a process according to the access frequency idle invention. 1A, in accordance with the present invention cognitive MIMO system includes a spectrum coordinator 100, the service base station PBS to a master device, a plurality of times and a plurality of serving base station SBS apparatus 1, SBS2, ... SBS s. The plurality of base station SBS 1-s, for example, may be a micro cell (microcell), pico cell base station side (picocells) in.
[0018]
First, the base station SBS 1-s collect the position information and the antenna device each time it serves angle information, and angle information is sent to the coordinator in the spectrum and the position information of each antenna device views acquired in step S110 100. Alternatively capacity, the base station SBS 1-s whether the interference at step S110 will support each secondary device reports to the alignment precoding spectrum coordinator 100.
[0019]
PBS reported to the base station 100 in S115 spectrum coordinator communication performance (e.g., interference noise ratio, INR), and antenna information (e.g., number of antennas, an antenna angle, etc.) the step of the master device. Alternatively, the base station PBS spectrum coordinator in step S115 the position information and also the main direction of the antenna device 100 to the information of the angle. Then, in step S120, the base station PBS idle times for the access device 100 using spectrum spectrum coordinator to report the indication information.
[0020]
A plurality of base stations is assumed that base station SBS SBS 1-s is 1, SBS 2 SBS and minor service S has free access to the master device to the spectrum need for communication, so the base station SBS 1, SBS2 SBS S in step S130, and request are transmitted access request message to the idle spectrum spectrum coordinator 100. Incidentally, the above steps S110-S130 only schematically illustrate the flow of processing, the present invention is not limited to the above-described execution sequence. In fact, it may be different from the order shown in FIG. 1A to implement the steps S110-S130.
[0021]
Next, the spectrum coordinator 100 at step S140 according to the received information about the secondary device and the primary device to determine whether to allow the base station SBS sends a request message 1, SBS 2 SBS S and secondary devices to access the free spectrum. The process to step S140 described in detail below with reference to FIGS. 2 and 3.
[0022]
After determining the idle spectrum allow access to the secondary device, proceed to the flowchart shown in FIG. 1B see. FIG. IB is assumed spectrum coordinator 100 allows only minor spectrum access base station SBS SBS 1 and 2, and therefore the spectrum coordinator 100 times, respectively, position information of all devices allows access to the base station SBS 2 SBS 1 and notification at step S150 and antenna angle information, and by the position information and antenna angle information of other devices to allow access to the secondary device interferes with the service base station.
[0023]
SBS 1 SBS 2 and the base station after receiving the relevant information notified spectrum coordinator 100, using this information allows the access times for the equipment it serves to calculate the channel matrix and the channel matrix interference, as shown in step S160. Then at step S170, the base station SBS 1 SBS 2, respectively, and a transmission signal for allowing access to a respective sub-device interference alignment precoding, and transmits the precoded signals to the respective devices to allow access times.
[0024]
Will be described in detail in conjunction with FIG. 2 is determined by the spectrum coordinator 100 according to the first embodiment allows the access processing device is idle times of the frequency band (FIG. 1A step S140). In FIG. 2, as an initial state, as shown in step 100 to allow access to the spectrum coordinator WS S211 interference noise in the master device in step S115 reported ratio (INR) and the number of antennas information set by the base station according to PBS the maximum number of times a device Nth, the coordinator 100 in addition to the spectrum value N representing the number of times the master device is currently idle spectrum access counter su set to zero.
[0025]
In particular, the base station reports PBS in step S115 may be performed periodically. Thus, in the case where the number of antennas or INR master device is changed, the spectrum coordinator 100 can be informed of the change, and accordingly re-set the maximum number of allowed access Nth. Thus, Nth parameters can be changed dynamically set according to the characteristics of the communication master device. For example, when the master device INR = 0dB, represents the master permits equal disruption and noise. Compared to this, when lowering the INR master device, means allowing reduction of interference received, in this case, the coordinator 100 may be a spectrum parameter Nth reset to a smaller value, i.e., reduced to allow access the number of times idle spectrum White equipment device, thereby reducing interference on the secondary device the master device. Conversely, when the master device is increased INR spectrum coordinator 100 may increase the value Nth.
[0026]
As described above, the base station SBS 1-s may be each device has the capability to support secondary interference alignment precoding report to the SS in step S110, the coordinator 100. In this case, the spectrum may coordinator 100 according to various views of the device has the ability to set the maximum permitted number of times of access devices Nth. For example, due to interference alignment precoding can be better suppressed, and the interference between the secondary device and the master device between the secondary devices, so when the system supports when relatively large number of times interference alignment precoding device, the coordinator 100 may be a spectrum the maximum number of allowed access to Nth set large. On the contrary, it will Nth set smaller.
[0027]
After setting Nth and Nsu, spectrum coordinator 100 enters a wait state, waiting to receive an access request from the secondary device, as shown in step S212. When the spectrum coordinator 100 receives requests to access particular slave device at step S213 when idle spectrum request message in step S214 that the value of the counter is incremented Nsu 1. Then compared with the maximum number of previously set value Nth Nsu counter after step S215, the coordinator 100 will increase the spectrum. If it is determined Nsu larger than Nth, means that the maximum number of the free band will exceed the allowable access, thus requesting the slave device will not be approved, the process ends in step S215. Conversely, if in step S215 is less than or equal to Nth Nsu, it means that even if the specific sub-access device does not exceed the maximum number allowed, the process proceeds to step S216.
[0028]
Spectrum coordinator 100 in accordance with step S216 (e.g. in the step S110 of FIG. 1A) and the angular position information of each antenna device views acquired for the device requesting access times (hereinafter, referred to as the j-th minor) calculate channel matrix H JJ and interference channel matrix H ij of , where i, j = 0,1, ..., s, and i ≠ j. The channel matrix H JJ describes a communication channel between the j-th minor side views corresponding to a communication device, the interfering channel matrix H ij of description interference channel between the j-th sub-device and other secondary devices. In particular, the case where the angle information in the positional information and the antenna base PBS additionally reports the master device to the spectrum coordinator 100 in step S115, the calculated herein interference channel matrix H ij of also describe the j-th secondary device interference channel between the master device.
[0029]
Starting from step S216, the coordinator 100 a request for spectrum access performance of the j-th receiving device views evaluated to decide whether to allow it access to the idle frequency band based on the evaluation. In general, the spectrum coordinator 100 generates a transmission signal for evaluation purposes, alignment precoding interference by the transmission signal (evaluation signal) and transmits the calculated performance of the j-th receiving device for the secondary signal transmission, and in accordance with the reception performance to determine whether to allow access to the j-th minor free spectrum. The following will be described in detail.
[0030]
In step S217, the coordinator 100 using the spectral transmission channel on the j-th secondary device at step S216 computed matrix H JJ calculates the SNR of the j-th transmission of the slave and the following formula:
[0031]
[Number 0001]

[0032]
Wherein H JJ j-th sub-channel transmission device matrix, W is j represents the j-th transmission beam forming matrix secondary device, the Z j is Gaussian noise.
[0033]
When the calculated signal to noise ratio the SNR j is smaller than a predetermined threshold value the SNR TH , this means that the j-th sub-device communication quality deteriorates, thus the spectrum coordinator 100 will reject the access request of the sub-device, as shown in step S218. Thereafter, the processing returns to the standby state S212. Incidentally, the predetermined threshold the SNR TH may be set by one skilled in the art according to the actual design requirements, it is not repeated here.
[0034]
When calculated in step S217 to noise ratio SNR J is greater than or equal to a predetermined threshold value SNR th , the processing proceeds to step S219. In step S219, the spectrum for the coordinator 100 to be sent to the j-th sub-device evaluation signal interference alignment precoding. It shows the formula used in the interference alignment precoding matrix:
[0035]
[Number 0002]

[0036]
Wherein, H 0j denotes the j-th channel interference views of the device to a secondary device 0 matrix, and so on, H SJ represents interference channel matrix times the j-th device to the s-th secondary device. The U- 0j j th secondary device interferes with the 0th sub-device alignment precoding matrix, on the most left when the interference alignment precoding, and so on, the U- SJ j th secondary device for the s-th secondary interfering device alignment precoding matrix, the precoding interference alignment when the rightmost. By aligning alignment precoding the precoding matrix U of the j-th transmission signals for the secondary device (i.e., the signal 100 generated by the evaluation of the spectrum coordinator) interference and using the interference to transmit, the device can be obtained by the j times received signal, as follows:
[0037]
[Number 0003]

[0038]
Wherein, beta] J represents a transmission power control factor, X J represents a transmission signal. As a result of interference alignment precoding, the formula (3) in a will be 0, that indicates interference between the secondary device and the j-th other secondary devices. That is, the interference alignment precoding eliminates mutual interference between the secondary devices.
[0039]
Then, the spectrum coordinator 100 by the received signal from the zero forcing equalization or minimum mean square error (MMSE) criterion to recover the original signal, the recovered signal as follows:
[0040]
[0041]
Since as described above for evaluation by the transmission signal generating spectrum coordinator 100, so in this case the spectrum coordinator 100 may restore a transmitted signal and the signal shown in Equation (4) is used to determine the performance of the j-th receiving device views, such as bit error rate BER. The reception performance under the assumption that the reflected transmission signal for the j-th interfering secondary alignment device precoding, the received signal quality of the j-th secondary device.
[0042]
Then, the spectrum coordinator 100 the determined error rate the BER J with a predetermined threshold value the BER TH are compared, as shown in step S220. The threshold is the BER TH may be set by one skilled in the art according to the actual design requirements, it is not repeated here. When the BER j is less than the threshold value the BER TH , this means that even if the interference alignment precoding, the j-th secondary device can not obtain an acceptable quality of the received signal, so the spectrum coordinator 100 will not be allowed free use of the spectrum, so that the processing proceeds to step S218. Conversely, if the BER j is greater than or equal to the threshold value the BER TH , interfering alignment precoding means can advantageously suppress the interference between the secondary device, the j-th secondary apparatus can obtain good reception performance, and therefore the spectrum coordinator 100 will allow the device access idle time spectrum, as shown in step S221. Thereafter, the process will return to again wait state S212.
[0043]
Note that in the flow shown in FIG. 2, step S217 is optional. That is, the step of determining the SNR is omitted, in this case, the spectrum coordinator 100 is calculated in step S216 after the transmission of channel matrix and the channel matrix interference step S219 to perform direct interference alignment precoding processing.
[0044]
Will be described in detail in conjunction with FIG. 3 coordinated by the spectrum according to a second embodiment of the process 100 determines to allow access to the device is idle times of bands (FIG. 1A step S140). The main difference between the process of the first embodiment shown in FIG. 2 that takes into account the priority of devices with different times of the case.
[0045]
In FIG 3, step S211 of FIG. 2 Similarly, the spectrum coordinator 100 S311 sets the maximum time allowed to access the device idle spectrum Nth number in step, and the value indicating the number of times of access devices WS counter Nsu set to 0. Further, the spectrum coordinator 100 in step S311, the system also determines an initial minor lowest priority [alpha] S .
[0046]
Then, the spectrum coordinator 100 waits to receive an access request from the secondary device at step S312. In step S313, the spectrum coordinator 100 receives priority level [alpha] j requesting access to the j-th idle times devices spectrum request message. Subsequently, the spectrum coordinator 100 at step S314 the value of the counter is incremented Nsu 1, at step S315, and the priority of the [alpha] j-th secondary device j with the lowest priority [alpha] S are compared.
[0047]
When [alpha] j-th priority of the slave device j is higher than the lowest priority in the system, [alpha] S , this means that secondary device access request having higher priority, so the spectrum coordinator 100 is allowed to access free spectrum , as shown in step S316. When the j-th secondary device allowing access, spectrum coordinator 100 in step S317 compares the current value of the counter with the maximum number of allowed access Nsu the Nth. If Nsu less than Nth, the maximum permitted access number yet mean secondary device, that is also allowed access to continue, the process returns to the wait step S312. If Nsu larger than Nth, resulting in the number of times the device is meant to allow the access idle spectrum exceeds the maximum allowed number of times after the j-th access device in step S316, in this case, the spectrum coordinator 100 will terminate the priority in step S318 is the lowest priority level [alpha] S secondary device to continue using the free spectrum, and terminates the operation after the lowest priority in the step S319 [alpha] updating system of S . Further, if the current value of the counter is equal to the Nth Nsu, the same Nsu smaller than Nth, the process returns to the wait step S312, the next waits to receive a request message from a secondary device.
[0048]
Referring back to step S315, the priority if [alpha] j-th secondary device j is equal to or lower than the lowest priority in the system, [alpha] S , it is necessary at this time is further judged whether the counter value Nsu greater than the maximum number of allowed access Nth, such as As shown in step S320.
[0049]
If it is determined in Nsu is greater than the Nth step S320, the slave device is not allowed access to the j-th idle spectrum, as shown in step S321.
[0050]
If it is determined Nsu less than or equal to the Nth In step S320, the process proceeds to step S322, the i.e., position information of each minor spectrum coordinator 100 using the acquired matrix H for the j-th secondary device calculates the transmission channel jj and interference channel matrix H ij of . Thereafter spectrum coordinator 100 performs steps S323-S326, S323-S326 are steps S217, S219, S220, and S221 in the same step shown in FIG. 2, it will not be repeated. Incidentally, similarly to the processing S217, step S323 here in comparison with the SNR of the step in FIG. 2 is optional.
[0051]
In particular, when the secondary device to allow access to the j-th idle spectrum in step S326, the coordinator 100 re spectral determination system of the device the lowest priority secondary [alpha] S , the process proceeds to step S319. After this, the spectrum coordinator 100 returns to S312 to wait state, waiting for the next access request from a secondary device.
[0052]
Incidentally, although described above primarily based on the priority orders processing apparatus to control access, but may be processed based on the QoS level required by the secondary device. Level and the level of priority QoS levels, respectively.
[0053]
4 will be described in conjunction with FIG spectrum coordinator function module according to the present invention 100. 4, the coordinator 100 comprises a spectral information determination unit 410, the interference alignment precoding matrix calculation unit 420, evaluation signal generation unit 430, the evaluation unit 440, a licensing unit 450, and the maximum number of access unit 460 is provided. The following will be described one by one.
[0054]
Information determining unit 410 according to a base station SBS 1-SBS s information and PBS report to determine information relating to the respective slave device and the master device, for example the number of antennas, antenna angle, position information, communication performance information, whether to support the interference alignment precoding, etc. and provides the determined information to the interference alignment precoding matrix calculation unit 420 and the maximum number of access unit 460 is provided.
[0055]
Interference alignment precoding matrix calculation unit 420 uses the secondary device and the primary device information provided by the information determination unit 410 calculates the interference channel matrix between the specific slave device and the other secondary devices and / or master devices using the interference calculated channel matrix generating device for the specific sub-interference alignment precoding matrix, as shown in equation (2).
[0056]
Evaluation signal generation unit 430 generates an evaluation signal, the evaluation signal is assumed to be sent to the specific sub-device, the purpose is to evaluate the reception performance evaluation signal to the specific sub-device.
[0057]
The evaluation unit 440 are respectively aligned from the interference pre-coding matrix computation unit to receive the generated interference 430,420 and evaluation signal generation unit alignment precoding matrix and evaluation signal, and using the interference alignment precoding matrix to precode the evaluation signal, and further give the secondary device may receive specific signal, such as the equation (3). The evaluation unit 440 to restore the evaluation signal, and determines a reception quality evaluation signal (e.g., BER) by comparing the signal to restore the original evaluation signal obtained from the received signal. Then, the reception quality evaluation unit 440 determines as a result to the license evaluation section 450.
[0058]
The licensing unit 450 determines whether to allow access to free spectrum specific sub master apparatus based on the evaluation result. Further, in addition to the reception quality, the licensing unit 450 may further priority (or QoS level) based on a particular sub-device number and the maximum allowed secondary peer access device to determine whether to allow the device to access a particular sub-free spectrum.
[0059]
Setting the maximum number of access antenna unit 460 according to the capability information and communication performance information supplied from the host device information determination unit 410, and / or minor support precoding interference alignment, allowing access to set idle spectrum times the maximum device number, and supplies the maximum number of unit 450 to the license, the license unit 450 for the license made accordingly.
[0060]
Above has the various embodiments of the invention are described in detail in conjunction with the accompanying drawings. According to the invention, by the secondary spectrum coordinator access control apparatus, to select an optimal combination of devices access the master device times the spectrum, which in comparison to unlimited (uncontrolled) for spectrum access spectrum access communication performance can ensure relatively better cognitive apparatus, thereby improving the system capacity and spectrum utilization.
[0061]
In addition, the device requests access to the secondary spectrum, the present invention effectively coordinate the orderly access to the respective sub-spectrum by the device controlling the spectrum coordinator, which can promptly and effectively respond to frequent changes in the network state. Further, since only the mutual information (such as location information, the antenna angle information) on the base station side, it is possible to reduce the use of pilot, thus reducing the system power consumption, and to reduce pilot pollution. Further, the present invention provides a process having a different priority or a case where the QoS level for the secondary device, it is possible to protect the secondary device different QoS requirements.
[0062]
The base station described herein may be implemented as any type of evolved Node B (eNB), such as a macro eNB, and a small eNB. Small eNB may be smaller than a macro cell covering the cell eNB, such as eNB pico, micro and home eNB (femto) eNB. Instead, the base station may also be implemented as any other type of base station, such as base transceiver stations and NodeB (BTS). Even various types of terminals can also be temporarily or semi-permanently perform the functions of the base station to operate as a base station. The base station may include: a body configured to control wireless communication (also referred to as base station apparatus); one or more remote radio head and a body separately provided.
[0063]
The order of steps described herein is illustrative only, not limited to processes or process must be performed in the order described. Without affecting the implementation of the present invention, changes may be made to the order of steps, or some steps may be performed in parallel with other steps.
[0064]
Also to be noted that the various devices or components described herein is merely a logical sense, and not strictly correspond to a physical device or component. For example, the function of each component described herein may be implemented by a plurality of physical entities, or a plurality of functional components described herein may be implemented by a single physical entity.
[0065]
In the above embodiment, a series of processes executed by each device or component may be implemented by software, hardware or a combination of software and hardware. Included in the software program may be stored in advance in a storage medium inside or outside each device or set of components. As one example, during the execution of these programs are written into a random access memory (RAM) and executed by a processor (e.g. CPU).
[0066]
FIG 5 is a block diagram illustrating an exemplary configuration of computer hardware performing the above-described series of processes according to a program.
[0067]
In the computer 500, a central processing unit (CPU) 501, a read only memory (ROM) 502 and random access memory (RAM) 503 are connected to each other by a bus 504.
[0068]
The input / output interface 505 is further connected to the bus 504. The input / output interface 505 is connected to the following components: an input unit to a keyboard, a mouse, a microphone 506 formed; an output to a display unit, a speaker 507, or the like; a storage unit to a hard disk, a nonvolatile memory 508 or the like; to a network interface card (such as a local area network (LAN) card, modem, etc.) formed by the communication unit 509; and a drive 511 drives the removable medium 510, the removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
[0069]
In the computer having the above-described structure, CPU 501 loads the program stored in the storage unit 508 via the input / output interface 505 and the bus 504 into the RAM 503, and executes the program, so as to perform the above-described series of processes.
[0070]
Programs to be executed may be recorded by the computer (CPU 501) in the removable medium 511 as a package medium, the package medium such as magnetic disk (including a flexible disk), optical disc (including compact disk - read only memory (CD-ROM)), digital versatile disc (DVD), etc.), a magneto-optical disk, or a semiconductor memory formed. Further, the program to be executed by the computer (CPU 501) may also be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
[0071]
When the removable medium 511 mounted in the drive 510, the program may be installed in the storage unit 508 via the input / output interface 505. Further, the program may be received by the communication unit 509 via a wired or wireless transmission medium, and installed in the storage unit 508. Alternatively, the program can be installed in the ROM 502 or the storage unit 508.
[0072]
To the computer executes may be a program to execute the processing according to the sequence described in this specification, or may be performed in parallel or when necessary processing (such as when invoked) to execute a process.
[0073]
Has been described in detail in conjunction with the above embodiments and technical effects of the invention are shown, but the scope of the present invention is not limited thereto. One of ordinary skill will appreciate that, depending on design requirements and other factors without departing from the principles and spirit of the present invention, various modifications or variations may be made to the embodiments discussed herein. Scope of the invention defined by the appended claims or the equivalents thereof.
[0074]
Further, the present invention may also be configured as follows.
[0075]
One kind of spectrum management apparatus, comprising one or more processors, the one or more processors are configured to: determine one or more secondary positional information and antenna angle information device in each secondary device; responsive to times idle spectrum master device access request, each according to the position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; and to allow access to the secondary device in each secondary device base station provides service access devices allow all times the position information and antenna angle information for the serving base station interference alignment precoding.
[0076]
The one or more processors are further configured to: determine the master device and antenna information communication performance information, and to set the access times to allow the device idle spectrum determined according to the antenna information and the communication performance information the maximum number, according to each position information and antenna angle information of the second device, and determines the channel matrix interference channel matrix times the access device a request for the idle spectrum; determining from the channel matrix and the interference channel matrix receiving performance of the device requesting access times; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determining whether to permit access to the device requesting access times of the WS .
[0077]
The one or more processors are further configured to: determine the position information and antenna angle information of the master device and slave device is determined based on the access request for the location information of the master device and antenna angle information the interfering channel matrix.
[0078]
The one or more processors are further configured to: generate an evaluation signal; using the determined channel matrix to determine the interference alignment precoding matrix for the interfering devices requesting access times; and using said interference alignment precoding matrix for a case where the evaluation signal precoding interference alignment, the apparatus determines the reception performance times requesting access to said evaluation signal.
[0079]
The one or more processors are further configured to: determine time receiving a signal of the evaluation signal to the access request, and to restore said evaluation signal from the received signal; and a signal recovery and in accordance with the evaluating the evaluation signal reception performance.
[0080]
The one or more processors are further configured to: determine an error rate of the recovered signal, and is smaller than the first threshold value of the error rate, the access to allow the secondary device the access request idle spectrum.
[0081]
The one or more processors are further configured to: request for access to the secondary device, using the determined channel matrix to determine the signal to noise ratio; and where the signal to noise ratio greater than a second threshold value next, determining whether the access request reception performance secondary device.
[0082]
The one or more processors are further configured to: according to a change to the information of the main antenna device and the communication performance information, dynamically set the maximum number of devices allowed to access the idle times of the frequency spectrum.
[0083]
The secondary device having mutually different priorities, and the one or more processors are further configured to: request access to the secondary device priority and the secondary device has access to the priority WS the lowest priority level comparing; and determining whether to allow access to the device requesting access time according to the comparison result of the WS.
[0084]
The one or more processors are further configured to: when the slave device requesting access priority higher than the lowest priority, allowing access to the secondary device requesting access to the WS.
[0085]
The one or more processors are further configured to: when the number of times allowed to access the device requesting access to the WS, if allowed to access the current spectrum of the device is idle times greater than the maximum number of , the ban has the lowest priority of time using the device idle spectrum.
[0086]
The one or more processors are further configured to: when the priority is lower than the secondary device requesting access to or equal to the lowest priority, according to the number of times the device has access to the idle spectrum determined whether to allow access to the slave device requesting access to the WS.
[0087]
The one or more processors are further configured to: when having access to the frequency spectrum times the number of idle apparatus reaches the maximum number, the access apparatus prohibits the idle times of the spectrum requesting access; and when the number of times a device has access to the idle spectrum does not reach the maximum number, determines that the access request reception performance secondary device.
[0088]
A method for controlling access to a communication system frequency spectrum, comprising: determining position information and antenna angle information about one or more secondary devices each secondary device; idle time response to a request the master device access spectrum, in accordance with each position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; all times and allows equipment to allow access to a secondary device in the access times for each device serving base station position information and antenna angle information for the serving base station interference alignment precoding.
[0089]
The method further comprising: determining a master device and antenna information communication performance information, and to specify the maximum number of access times idle spectrum of the device according to the determined information to the antenna and the communication performance information; according to each position information and antenna angle information of the second device, and determines the channel matrix interference channel matrix times the access device a request for the idle spectrum; determining access times of the request based on the channel matrix and the interference channel matrix receiving performance of the device; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determining whether to permit the access request to access the secondary device WS.
[0090]
The method further comprising: generating an evaluation signal; determined using the interference channel matrix to determine the interference of the apparatus for requesting access times of alignment precoding matrix; and in interfering alignment using the pre-coding matrix signal evaluation case of interference alignment precoding, determining whether the device requesting access times of the reception performance evaluation signal.
[0091]
The method further comprising: determining times receiving a signal of the evaluation signal to the access request, and to restore said evaluation signal from said receive signals; and evaluated according to the evaluation signal and said signal recovered said reception performance.
[0092]
Priority, said method having the mutually different times apparatus further comprising: requesting access to the secondary device priority and the lowest priority access has the priority comparing the idle time spectrum of the device ; and determining whether to allow access to the device requesting access time according to the comparison result of the WS.
[0093]
The method further comprising: when the secondary device access request priority higher than the lowest priority, allowing access to the secondary device requesting access to the WS.
[0094]
The method further comprising: when the secondary device access request is less than or equal to the priority of the lowest priority is determined according to the number of times the device has access to the idle spectrum whether to permit the access request secondary device access to the WS.
[0095]
Method for accessing a communication system frequency spectrum, said spectrum communication system comprising a management device, the one or more host devices, and a device or a plurality of times the method comprising: in response to the idle time of the master device access requested spectrum, the spectrum management apparatus based on position information and antenna angle information of each of the slave device determines to allow access to the secondary device idle spectrum; the spectrum management device to each secondary device to allow access to services position information and antenna angle information allows access to the base station notifies all the secondary device; and the serving base station using the notified position information and antenna angle information about the actual transmission signal precoding interference alignment, to send it to service allows access to the secondary device.
[0096]
Determining step of allowing access to the secondary device WS further comprising: determining performance of the communication antenna information and information of the master device, and allowing access to the WS of the antenna according to the determined information and the communication performance information set the maximum number of times a device, according to each position information and antenna angle information of the second device, and determines the channel matrix interference channel matrix times the access device a request for the idle spectrum; according to the transmission channel and the interfering channel matrix matrix determining performance of the receiving device requesting access times; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determining whether to permit access to the device requesting access times of the idle spectrum.
[0097]
Determining reception performance of the secondary device requesting access further comprises the step of: generating an evaluation signal; using the determined channel matrix to determine the interference alignment precoding matrix for the interfering devices requesting access times; and using the interference alignment precoding matrix for the assessment of the interference signal in alignment precoding, determining whether the device requesting access times of the reception performance evaluation signal.
[0098]
Determining the device requesting access times for the performance of said step of evaluating the received signal further comprises: receiving a signal determining the time evaluation signal of the access request, and restores the received signal from the evaluation signal; and evaluated according to the evaluation signal and the recovery signal reception performance.
[0099]
The secondary device having mutually different priorities, said method further comprising: the priority of the spectrum management apparatus WS secondary device in the secondary device access request priority and has access to comparing the lowest priority, and determining whether to permit the access request to access the secondary device WS according to the comparison result.
[0100]
The method further comprising: when the next highest priority device requesting access is greater than the lowest priority, the spectrum management apparatus allows the device to access the idle times of the spectrum access request; and when the said secondary device requesting access priority is less than or equal to the lowest priority, the spectrum management apparatus to determine whether to allow the secondary device the access request according to the number of times the device has access to the idle spectrum free access to the spectrum.

Claims

[Claim 1]One kind of spectrum management apparatus, comprising one or more processors, the one or more processors are configured to: determine one or more secondary positional information and antenna angle information device in each secondary device; responsive to times idle spectrum master device access request, each according to the position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; and to allow access to the secondary device in each secondary device base station provides service access devices allow all times the position information and antenna angle information for the serving base station interference alignment precoding.
[Claim 2]
The spectrum management apparatus according to claim 1, wherein the one or more processors are further configured to: determine a communication antenna information and performance information of the master device, and to determine according to the antenna information and the communication performance information specify the maximum number of access times idle spectrum of said apparatus; determining the channel matrix, and interference channel matrix times the access device a request for the idle spectrum according to each position information and antenna angle information of the second device; according to the said transmission channel matrix and the received interference channel matrix determines the performance request access to the secondary device; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determining whether the request is allowed the access apparatus to access the secondary WS.
[Claim 3]
The spectrum management apparatus according to claim 2, wherein the one or more processors are further configured to: determine the position information and antenna angle information of the master device, and the information based on the position information of the master device and the antenna angle determining the interference channel matrix times for requesting access to the apparatus.
[Claim 4]
The spectrum management apparatus according to claim 2, wherein the one or more processors are further configured to: generate an evaluation signal; determined using the interference channel matrix to determine the interference for the secondary device requesting access alignment pre-coding matrix; and in the case where the interference alignment precoding matrix for the evaluation signal interference alignment precoding, determining whether the access request reception performance of the secondary device of the evaluation signal.
[Claim 5]
Spectrum management apparatus according to claim 4, wherein the one or more processors are further configured to: determine time receiving a signal of the evaluation signal to the access request, and to recover from the received signal the evaluation signal; and a signal recovery was evaluated according to the evaluation signal and the reception performance.
[Claim 6]
Spectrum management apparatus according to claim 5, wherein the one or more processors are further configured to: determine an error rate of the recovered signal, and is smaller than the first threshold value of the error rate, allowing the said apparatus requesting access times to access the WS.
[Claim 7]
The spectrum management apparatus according to claim 2, wherein the one or more processors are further configured to: request for access to the secondary device, using the determined channel matrix to determine the signal to noise ratio; and a case where the signal to noise ratio than the second threshold value, determining that the access request reception performance secondary device.
[Claim 8]
The spectrum management apparatus according to claim 2, wherein the one or more processors are further configured to: according to a change to the information of the main antenna device and the communication performance information, is provided to allow access to the dynamic the maximum number of times said spectral device is idle.
[Claim 9]
The spectrum management apparatus according to claim 2, wherein the secondary device having mutually different priorities, and the one or more processors are further configured to: the priority device requesting access times of and has access to the secondary device WS priority of the lowest priority comparing; and determining whether to allow access to the device requesting access time according to the comparison result of the WS.
[Claim 10]
Spectrum management apparatus according to claim 9, said one or more processors are further configured to: when the next highest priority device requesting access is greater than the lowest priority, the request is allowed access secondary device access to the WS.
[Claim 11]
The spectrum management apparatus according to claim 10, the one or more processors are further configured to: when the secondary device access to grant the request of access to the WS, if allowed to access the idle current the number of spectral times greater than the maximum number of devices, is prohibited having the lowest priority using the secondary device WS.
[Claim 12]
The spectrum management apparatus according to claim 9, said one or more processors are further configured to: when the device requesting access time less than or equal priority to the lowest priority, according to have access the number of times of idle spectrum apparatus determining whether to allow access to the slave device requesting access to the WS.
[Claim 13]
The spectrum management apparatus according to claim 12, said one or more processors are further configured to: when the number of times access has been idle spectrum device reaches the maximum number, prohibits the access request access to the secondary device WS; and when the number of times a device has access to the idle spectrum does not reach the maximum number, determines that the access request reception performance secondary device.
[Claim 14]
A method for controlling access to a communication system frequency spectrum, comprising: determining position information and antenna angle information about one or more secondary devices each secondary device; idle time response to a request the master device access spectrum, in accordance with each position information and antenna angle information of the second device, the access time is determined to allow the device idle spectrum; all times and allows equipment to allow access to a secondary device in the access times for each device serving base station position information and antenna angle information for the serving base station interference alignment precoding.
[Claim 15]
The method according to claim 14, further comprising: determining performance of the communication antenna information and information of the master device, and to set the access times to allow the device idle spectrum determined according to the antenna information and performance information of the communication the maximum number; each according to the position information and antenna angle information of the second device, and determines the channel matrix interference channel matrix times the access device a request for the idle spectrum; according to the channel matrix and the channel matrix determined by the interference said reception performance request access to the secondary device; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determining whether to allow access to the secondary device requesting access to the WS.
[Claim 16]
The method of claim 15, further comprising: generating an evaluation signal; determined using the interference channel matrix to determine the interference of the apparatus for requesting access times of alignment precoding matrix; and using the interference pre-alignment encoding matrix the interference signal evaluation alignment precoding in determining the performance of an access request receiving device to the secondary of the evaluation signal.
[Claim 17]
The method according to claim 16, further comprising: determining times receiving a signal of the evaluation signal to the access request, and to restore said evaluation signal from the received signal; and a signal recovery and in accordance with the said evaluation signal for evaluating the reception performance.
[Claim 18]
The method according to claim 15, wherein the secondary devices having mutually different priorities, said method further comprising: requesting access to the secondary device priority and has access to the secondary WS device priority in comparing the lowest priority; and determining whether to allow access to the device requesting access time according to the comparison result of the WS.
[Claim 19]
The method according to claim 18, further comprising: when the secondary device access request priority higher than the lowest priority, allowing access to the device requesting access times of the WS.
[Claim 20]
The method of claim 18, further comprising: when the secondary device access request is equal to or less than the priority of the lowest priority, to determine whether the access according to the number of times the device has been idle spectrum according allowing the access request to access the secondary device WS.
[Claim 21]
Method for accessing a communication system frequency spectrum, said spectrum communication system comprising a management device, the one or more host devices, and a device or a plurality of times the method comprising: in response to the idle time of the master device access requested spectrum, the spectrum management apparatus based on position information and antenna angle information of each of the slave device determines to allow access to the secondary device idle spectrum; the spectrum management device to each secondary device to allow access to services position information and antenna angle information allows access to the base station notifies all the secondary device; and the serving base station using the notified position information and antenna angle information about the actual transmission signal precoding interference alignment, to send it to service allows access to the secondary device.
[Claim 22]
The method according to claim 21, wherein the determining step of allowing access to the secondary device WS further comprising: determining performance of the communication antenna information and information of the master device, and determining the information and the communication antenna according to performance information provided to allow access to the maximum number of times idle spectrum of said apparatus; determining the channel matrix, and interference channel matrix times the access device a request for the idle spectrum according to each position information and antenna angle information of the second device; channel matrix and the channel matrix to determine the interference reception performance of the device requesting access times according to the transmission; and the reception performance based on the maximum access time and allowing the device number of idle spectrum, determine whether to allow the said apparatus requesting access times to access the WS.
[Claim 23]
The method according to claim 22, wherein the step of receiving performance of the device requesting access time further comprises determining: generating an evaluation signal; determined using the interference matrix to determine a channel for the requesting access times interfering device alignment precoding matrix; and in the case where the interference alignment precoding matrix for the evaluation signal interference alignment precoding, determining reception performance of the device requesting access times of the evaluation signal.
[Claim 24]
The method according to claim 23, wherein said determining device requesting access times for the performance of said step of evaluating the received signal further comprises: determining a received signal of the device requesting access times of the evaluation signal and to recover the received signal from said evaluation signal; and a signal recovery was evaluated according to the evaluation signal and the reception performance.
[Claim 25]
The method according to claim 22, wherein the secondary devices having mutually different priorities, said method further comprising: said pair of secondary spectrum management device requesting access to the device priority and has access to the priority of said slave device in the idle spectrum comparing the lowest priority, and determining whether to permit the access request to access the secondary device WS according to the comparison result.
[Claim 26]
The method according to claim 25, further comprising: when the next highest priority device requesting access is greater than the lowest priority, the spectrum management apparatus to access the secondary device allows the access request free spectrum; and when the priority is less than twice the device requesting access to or equal to the lowest priority, the spectrum management apparatus determines whether to permit the access in accordance with the number of times the device has been idle spectrum according requesting access times of the access device WS.