WO2013097398A1

WO2013097398A1 - Method and terminal for optimizing use of spectrum resources

Info

Publication number: WO2013097398A1
Application number: PCT/CN2012/075733
Authority: WO
Inventors: 王曼
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-12-31
Filing date: 2012-05-18
Publication date: 2013-07-04
Also published as: CN103188711A

Abstract

Disclosed is a method for optimizing use of spectrum resources, comprising: a terminal periodically monitoring the performance of a frequency spectrum band in a range acceptable to the terminal; when authorized spectrums of the terminal are all occupied, the terminal determining, according to the currently monitored performance of the frequency spectrum band in the range acceptable to the terminal, a to-be-switched-to target unauthorized spectrum from unauthorized spectrums in the frequency spectrum band in the range acceptable to the terminal, and switching to the determined target unauthorized spectrum. Also disclosed is a terminal for optimizing use of spectrum resources. The method and the terminal according to the embodiments of the present invention can effectively improve the utilization of the spectrum resources.

Description

Method and terminal for optimizing spectrum resource use

The present invention relates to a spectrum resource utilization technology in the field of wireless communication, and in particular, to a method and terminal for optimizing use of a spectrum resource. Background technique

The development of wireless networks has shown a trend of high speed, broadband, isomerization, and ubiquity. At the same time, wireless networks are also facing severe challenges, including: shortage of spectrum resources and waste. On the one hand, the increasing demand for wireless services, such as the proliferation of mobile communication users, the application expansion of all aspects of public safety, and the increasing number of TV broadcast channels, make wireless spectrum resources an extremely important resource in the society. As a scarce resource, spectrum resources are very limited. If they are occupied, they cannot be redistributed. If they are allocated, they will be gone. Therefore, there is a shortage of spectrum resources. On the other hand, although some spectrum resources have already been allocated, the owners of these allocated spectrum resources cannot effectively use the spectrum due to technical or business constraints. Surveys show that at a given time, the spectrum resources used by people only account for 2% to 6% of all available spectrum resources, thus consuming a limited amount of spectrum resources. Due to the lack of spectrum cognitive capabilities, the scarcity and waste of spectrum resources cannot be solved in cooperative communication networks, heterogeneous networks, and wireless sensor networks.

In summary, there is currently no technical solution to address the scarcity and waste of spectrum resources. Summary of the invention

In view of this, the main purpose of the embodiments of the present invention is to provide a method and a terminal for optimizing the use of spectrum resources, which can effectively improve the utilization of spectrum resources.

In order to solve the above technical problem, the technical solution of the embodiment of the present invention is implemented as follows: An embodiment of the present invention provides a method for optimizing use of a spectrum resource, where the method includes: periodically monitoring, by a terminal, a performance of a spectrum segment within an acceptable range thereof;

When the licensed spectrum of the user is occupied, the terminal determines the target unlicensed spectrum to be switched from the unlicensed spectrum in the spectrum segment within its acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range. And switch to the determined target unlicensed spectrum.

In the foregoing solution, the periodically monitoring the performance of the spectrum segment within the acceptable range of the terminal is: the terminal periodically monitors the performance of the spectrum segment within the acceptable range by interacting with the information on the network side; or

The terminal periodically monitors the performance of the spectrum segments within its acceptable range in the time domain, frequency domain and airspace multidimensional space.

In the above solution, the terminal periodically monitors the performance of the spectrum segment within its acceptable range by interacting with the information on the network side, as follows:

The terminal obtains the performance of the spectrum segment within its acceptable range by interacting with the periodic information on the network side.

In the above solution, the terminal determines the target unlicensed spectrum of the handover from the unlicensed spectrum in the spectrum segment within the range of its own acceptable range according to the performance of the spectrum segment in the currently-acceptable range, including:

The terminal prioritizes the availability of all monitored spectrum according to the performance of the currently monitored spectrum segment within its own acceptable range;

The unlicensed spectrum with low priority and idle is selected as the target unlicensed spectrum of the handover. In the above solution, after the handover to the determined target unlicensed spectrum, the method further includes: the terminal detecting the authorized terminal corresponding to the target unlicensed spectrum in real time, and determining that the authorized terminal corresponding to the target unlicensed spectrum needs to access, The terminal determines the new target unlicensed spectrum of the handover from the unlicensed spectrum in the spectrum segment within its own acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range, and switches to the determined new target non- Authorized spectrum. In the above solution, the determining that the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed is:

The terminal obtains an access request sent by the authorized terminal corresponding to the target unlicensed spectrum to the network side.

In the above solution, the terminal determines the new target unlicensed spectrum to be switched from the unlicensed spectrum in the spectrum segment within the self-acceptable range according to the performance of the spectrum segment in the currently-acceptable range, including:

An unlicensed spectrum other than the target unlicensed spectrum with a low priority and idle is selected as a new target unlicensed spectrum for handover.

In the above solution, the target unlicensed spectrum is an idle unlicensed spectrum with the best performance among the spectrum segments within the acceptable range of the terminal itself;

Correspondingly, the new target unlicensed spectrum is an idle unlicensed spectrum with the second best performance in the spectrum segment within the acceptable range of the terminal itself.

The embodiment of the present invention further provides a terminal for optimizing the use of the spectrum resource, where the terminal includes: a monitoring module and a switching module;

a monitoring module, configured to periodically monitor performance of a spectrum segment within an acceptable range thereof, and trigger a switching module when the licensed spectrum of the terminal is occupied;

The switching module is configured to: after receiving the triggering information of the monitoring module, determine the target of the switching from the unlicensed spectrum in the spectrum segment within the self-acceptable range according to the performance of the currently monitored spectrum segment within the acceptable range Unlicensed spectrum, and switched to the determined target unlicensed spectrum.

In the above solution, the monitoring module is further configured to: after the switch to the determined target unlicensed spectrum, detect the authorized terminal corresponding to the target unlicensed spectrum in real time, and determine that the authorized terminal corresponding to the target unlicensed spectrum needs to access Triggering the switching module; The switching module is further configured to: after receiving the trigger information of the monitoring module, determine, according to the performance of the currently monitored spectrum segment within the range of its own acceptable range, from the unlicensed spectrum in the spectrum segment within its own acceptable range. Switch the new target unlicensed spectrum and switch to the determined new target unlicensed spectrum.

The method and the terminal for optimizing the use of the spectrum resource provided by the embodiment of the present invention, the terminal periodically monitors the performance of the spectrum segment within its acceptable range; when the licensed spectrum of the user is occupied, the terminal according to the currently monitored self-acceptable range The performance of the spectrum segment within the spectrum, from the unlicensed spectrum in the spectrum segment within its own acceptable range, determines the target unlicensed spectrum of the handover, and switches to the determined target unlicensed spectrum, thus effectively improving the spectrum resources. Utilization rate.

In addition, after the switch to the determined target unlicensed spectrum, the terminal detects the authorized terminal corresponding to the target unlicensed spectrum in real time, and when determining that the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed, the terminal according to the current Detecting the performance of the spectrum segment within its own acceptable range, determining the new target unlicensed spectrum of the handover from the unlicensed spectrum in the spectrum segment within its own acceptable range, and switching to the determined new target unlicensed spectrum, In this way, the terminal can quickly return the occupied unlicensed spectrum, thereby further improving the utilization of spectrum resources. DRAWINGS

1 is a schematic flowchart of a method for optimizing use of a spectrum resource according to an embodiment of the present invention;

2 is a schematic flowchart of a method for implementing optimized spectrum resource usage according to a specific embodiment of the present invention; FIG. 3 is a schematic structural diagram of a terminal for optimizing spectrum resource usage according to an embodiment of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

In recent years, the concept of cognitive radio (CR, Cognitive Radio) has been proposed. The CR refers to: The wireless terminal has sufficient intelligence or cognitive ability to monitor, analyze, learn, reason, and plan the history and current conditions of the surrounding wireless environment, and adjust the corresponding results. The entire transmission parameters are used to complete the wireless transmission using the most suitable wireless resources. In other words, by perceiving the spectral environment characteristics such as frequency, time, and space around, the internal structure of the environment, location, channel, network, protocol, user, and device itself is inferred by an understanding method to make the wireless terminal advance. The blind performers who define the protocol are transformed into intelligent agents in the radio domain, so that the transmission parameters can be adjusted in real time, so that the wireless rules of the system are adapted to the input radio excitation changes, so that the communication system achieves high adaptability to the wireless environment and spectrum sharing. Efficient. Here, the wireless rules of the system include: setting a series of radio frequency bandwidths suitable for rational use of the wireless spectrum, air interfaces, related protocols, and spatial and temporal modes.

The emergence of cognitive wireless networks provides a new way of thinking, methods and approaches for the efficient use of spectrum resources. Based on the foregoing series of CR scenarios, the method for optimizing the use of spectrum resources in the embodiment of the present invention, as shown in FIG. 1, includes the following steps:

Step 100: The terminal periodically monitors the performance of the spectrum segment within its acceptable range, and then performs step 101;

Here, the spectrum segment within the self-acceptable range refers to: a spectrum segment within a range acceptable to the radio frequency device of the terminal; wherein the radio frequency device may specifically be a filter. In order to implement the method for optimizing the use of the spectrum resources in the embodiment of the present invention, the terminal needs to switch between different spectrums, that is, the span of the spectrum is large, and therefore, the communication device, especially the filter, needs a relatively wide spectrum processing range. , a broadband filter is required. In practical applications, the wideband filter refers to a filter having a bandwidth greater than 20M.

Specifically, the terminal periodically monitors the performance of the spectrum segment within its acceptable range by interacting with the information on the network side; or, the terminal periodically monitors its acceptable range in the time domain, the frequency domain, and the spatial multi-dimensional space. The performance of the spectrum segment within. The terminal periodically monitors the performance of the spectrum segment in its own acceptable range by interacting with the information on the network side. Specifically, the terminal can obtain the self-acceptable range by periodically interacting with the network side periodically. The performance of the spectrum segment. The terminal is periodically monitored in a time domain, a frequency domain, and an airspace multidimensional space. Specific implementations of the performance of the spectrum segment within an acceptable range include:

In the frequency domain, the terminal can know the transmitted signal-to-noise ratio and the received signal-to-noise ratio. By comparing the received signal-to-noise ratios on each spectrum, the performance of the spectrum segment within its acceptable range can be known. In the airspace, the terminal The performance of other spectrum segments except for the licensed spectrum of itself is obtained according to the transmission signal and the received signal of the other spectrum segments except for the licensed spectrum by the plurality of antennas. Here, by performing corresponding software, and/or hardware improvement, the existing terminal can implement the above-mentioned skill of the above-mentioned skill, and details are not described herein again.

The performance of the spectrum segment includes: a signal to noise ratio of a spectrum segment, a data flow rate of a spectrum corresponding channel, and the like.

The length of the cycle can be set as needed.

Step 101: When the licensed spectrum of the user is occupied, the terminal determines the target of the handover from the unlicensed spectrum in the spectrum segment within its own acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range. Unlicensed spectrum, and switched to the determined target unlicensed spectrum.

Here, since the terminal periodically monitors the performance of the spectrum segment including its own acceptable range of the licensed spectrum, it can be known whether or not its own licensed spectrum is occupied.

Determining, by the terminal, the target unlicensed spectrum of the handover from the unlicensed spectrum in the spectrum segment within the range of the self-acceptable range, according to the performance of the spectrum segment in the currently-acceptable range, including:

The unlicensed spectrum with low priority and idle is selected as the target unlicensed spectrum of the handover. In actual application, the availability of the spectrum may be classified into three levels according to the performance of the monitored spectrum segment, such as: signal to noise ratio, or data traffic of the corresponding channel of the spectrum, namely: high, medium, and low; Among them, the meaning of high level means: The spectrum is always used or most of the time, That is: the probability of using the monitored spectrum is more than 50%. The meaning of the medium level means: The spectrum is used occasionally, ie: The probability of using the monitored spectrum is less than 50%. The meaning of the low level means: The spectrum is basically not used. The frequency band, for example: The probability of using the monitored spectrum is less than 10%, and the availability level of the spectrum is considered to be low. Here, the specific processing for determining whether the monitored spectrum is in use according to the signal-to-noise ratio or the data flow of the spectrum corresponding channel is prior art, and details are not described herein again. When the availability of the unlicensed spectrum is low and the current is idle, the terminal can determine whether to switch according to the needs of the service. Specifically, if the terminal needs to occupy the unlicensed spectrum for a long time, the switch can only be performed at a low level. If the terminal only temporarily uses the unlicensed spectrum for a short time, it can be switched between the middle level and the low level. When it is determined that it is possible to switch to the unlicensed spectrum, it switches to the unlicensed spectrum. The specific switching process is as follows: The terminal can obtain idle channel information according to the performance of the monitored spectrum segment, and randomly select an idle channel access. Here, the terminal can directly determine which channels are idle channels according to the performance of the monitored spectrum segments. A more specific process of switching to the determined target unlicensed spectrum may employ prior art techniques.

The purpose of selecting an unlicensed spectrum with a low priority and being idle is to prevent the terminal from switching to the alternate channel to re-communicate the communication due to the sudden appearance of the authorized terminal corresponding to the unlicensed spectrum, thereby affecting the communication quality.

After the handover to the determined target unlicensed spectrum, the method may further include: the terminal detecting the authorized terminal corresponding to the target unlicensed spectrum in real time, and determining that the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed, the terminal is configured according to the The performance of the currently monitored spectrum segment within its own acceptable range, from the unlicensed spectrum in the spectrum segment within its own acceptable range, determining the new target unlicensed spectrum for handover, and switching to the determined new target unlicensed spectrum .

The determining, by the authorized terminal corresponding to the target unlicensed spectrum, needs to be accessed, specifically:

The terminal obtains an access request sent by the authorized terminal corresponding to the target unlicensed spectrum to the network side. Here, after switching to the target unlicensed spectrum, the terminal is in the target unlicensed spectrum Communicate with the network side. When the network side receives the access request of the authorized terminal corresponding to the target unlicensed spectrum, the network side immediately sends the handover request information to the terminal according to the priority information saved by the network, and the terminal obtains the target unlicensed spectrum. The corresponding authorized terminal sends an access request to the network side.

The terminal determines the new target unlicensed spectrum of the handover from the unlicensed spectrum in the spectrum segment within the self-acceptable range according to the performance of the currently monitored spectrum segment within the self-acceptable range, including:

Here, in actual application, when the unlicensed spectrum that the terminal switches for the first time is the lowest priority unlicensed spectrum selected from the spectrum segment, that is, when the selected unlicensed spectrum is the optimal spectrum, the second time When switching, the sub-optimal spectrum, that is, the unlicensed spectrum with the lower priority is selected as the new target grant spectrum, and so on.

The method may further include: recovering, by the network side, an original related parameter of the target unlicensed spectrum, and establishing a connection with an authorized terminal corresponding to the target unlicensed spectrum, when the device is switched to the determined new target unlicensed spectrum.

The original related parameter refers to: a parameter related to an authorized terminal corresponding to the target unlicensed spectrum, and the original related parameter includes: a utility function and the like.

The present invention will be further described in detail below with reference to specific embodiments.

Embodiment 1

The application scenario of this embodiment is: The terminal periodically monitors the performance of the spectrum segment within its acceptable range based on the wireless environment map information provided by the upper layer wireless management layer. The following steps:

Step 200: After receiving the specific service request of the user, the terminal periodically submits a request to the upper wireless management layer to obtain environment sensing information.

Here, in the specific embodiment, the specific service request refers to: a video conference call request. The environment-aware information includes: wireless environment map information, spectrum environment information, and a signal-to-noise ratio of a spectrum segment within a range acceptable to the terminal, wherein the spectrum environment information includes: surrounding frequency, time, and space information .

Step 201: The terminal periodically monitors the acquired signal-to-noise ratio of the spectrum segment within the acceptable range by extracting the acquired environment sensing information.

Step 202: When the licensed spectrum of the user is occupied, the terminal prioritizes the availability of the monitored spectrum according to the signal to noise ratio of the currently monitored spectrum segment within the acceptable range. Step 203: The terminal is scheduled according to the schedule. The priority order determines the best unlicensed spectrum and video network that can be used and switches to the best unlicensed spectrum.

Specifically, it is assumed that the wireless environment map information currently sent by the upper layer wireless management layer indicates that the terminal is within the coverage of a wireless area network, and the television channel 9 is available. The terminal detects the video channel 9 and the adjacent channel to verify the wireless environment map information from the upper wireless management layer. If it is confirmed that the television channel 9 is indeed applicable, the terminal sends a handover request to the network side, and after receiving the handover request, the network side determines an appropriate utility function for the terminal, thereby satisfying the service type and quality of service requirements of the terminal, for example: data transmission rate , delay, bit error rate, and power consumption. After that, the terminal switches to TV channel 9. Here, the process of the terminal detecting the television channel 9 and the adjacent channel to verify the wireless environment map information from the upper layer wireless management layer means: determining the best unlicensed spectrum and video network implementation that can be used. Example 2:

The application scenario of this embodiment is as follows: The licensed spectrum of the terminal is occupied, and has been switched to Unlicensed spectrum. The process of performing the secondary handover by the terminal includes: after the terminal accesses the idle channel and starts communication, detecting the authorized terminal corresponding to the unlicensed spectrum, and continuously detecting the authorized terminal corresponding to the unlicensed spectrum. When it is detected that an authorized terminal corresponding to the unlicensed spectrum needs to access, for example, when receiving an access request of an authorized terminal corresponding to the unlicensed spectrum, the terminal initiates an emergency handover. Here, the process of emergency handover includes: First, the terminal saves the current environmental parameters, and selects an appropriate new target unlicensed spectrum according to the priority order of the scheduled availability of all monitored spectrums, and proposes handover to the network side. After the network side receives the handover request and determines that the new target unlicensed spectrum can be switched, the terminal switches to the selected new target unlicensed spectrum and re-establishes the communication connection. At the same time, the network side restores the utility function matching the authorized terminal to meet the service type and service quality requirements of the authorized terminal, for example: data transmission rate, delay, bit error rate, power consumption, etc., and establishes and establishes through the connection establishment process. The communication connection of the authorized terminal. Here, the environmental parameters include: spectral environment parameters such as frequency, time, and space around. The new target unlicensed spectrum is a suboptimal unlicensed spectrum compared to the performance of the target unlicensed spectrum of the first handover. The network side saves a utility function matching the authorized terminal in advance, so that when the authorized terminal needs to access, the utility function matching the authorized terminal can be quickly restored.

It can be seen from the above description that the method for optimizing the use of spectrum resources provided by the embodiments of the present invention firstly realizes accurate wireless spectrum detection capability of the wireless terminal, and can perform multi-dimensional spectrum monitoring within its own acceptable range, thereby discovering The spectrum that can be used. Secondly, since the terminal is licensed to use unlicensed spectrum resources, the terminal realizes the ability to quickly discover the master terminal, and detects the active state of the master terminal at work, thereby ensuring no interference to the master terminal. Here, the primary terminal refers to: an authorized terminal corresponding to an unlicensed spectrum occupied by the terminal. Third, when the authorized terminal corresponding to the unlicensed spectrum occupied by the terminal needs to access, the terminal implements the capability of immediately returning the spectrum resource of the authorized terminal.

In order to implement the foregoing method, the embodiment of the present invention further provides a terminal for optimizing the use of the spectrum resource. As shown in FIG. 3, the terminal includes: a monitoring module 31 and a switching module 32; The monitoring module 31 is configured to periodically monitor the performance of the spectrum segment within its acceptable range, and trigger the switching module 32 when the authorized spectrum of the terminal is occupied.

The switching module 32 is configured to: after receiving the trigger information of the monitoring module 31, determine, according to the performance of the currently monitored spectrum segment within the range of its own acceptable range, determine the handover from the unlicensed spectrum in the spectrum segment within its own acceptable range. The target is unlicensed spectrum and switched to the identified target unlicensed spectrum.

It should be noted that the monitoring module 31 may specifically be a radio frequency module, a baseband module capable of implementing a monitoring function, or a logic module formed by software.

The monitoring module 31 is further configured to detect an authorized terminal corresponding to the target unlicensed spectrum in real time after switching to the determined target unlicensed spectrum, and trigger when the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed. Switching module 32;

The switching module 32 is further configured to: after receiving the trigger information of the monitoring module 31, according to the performance of the currently monitored spectrum segment within the self-acceptable range, from the unlicensed spectrum in the spectrum segment within the self-acceptable range , determine the new target unlicensed spectrum for the handover, and switch to the determined new target unlicensed spectrum.

Here, it should be noted that the specific processing procedures of the monitoring module 31 and the switching module 32 in the terminal in the embodiment of the present invention have been described in detail above, and are not described again.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A method for optimizing use of a spectrum resource, the method comprising: the terminal periodically monitoring performance of a spectrum segment within an acceptable range thereof;

2. The method according to claim 1, wherein the periodically monitoring the performance of the spectrum segment within the acceptable range is:

The terminal periodically monitors the performance of the spectrum segment within its acceptable range by interacting with the information on the network side; or

The method according to claim 2, wherein the terminal periodically monitors the performance of the spectrum segment within its acceptable range by interacting with the information on the network side, as follows:

The method according to claim 1, 2 or 3, wherein the terminal is not in the spectrum segment within its own acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range. In the licensed spectrum, determine the target unlicensed spectrum for handover, including:

The unlicensed spectrum with low priority and idle is selected as the target unlicensed spectrum of the handover.

The method according to claim 1, 2 or 3, wherein, after switching to the determined target unlicensed spectrum, the method further comprises:

The terminal detects the authorized terminal corresponding to the target unlicensed spectrum in real time, when determining the target When the authorized terminal corresponding to the unlicensed spectrum needs to access, the terminal determines the new target to be switched from the unlicensed spectrum in the spectrum segment within its acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range. Unlicensed spectrum, and switch to the determined new target unlicensed spectrum.

The method according to claim 5, wherein the determining that the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed is:

The method according to claim 5, wherein the terminal is from an unlicensed spectrum in a spectrum segment within its own acceptable range according to the performance of the currently monitored spectrum segment within its own acceptable range. Determine the new target unlicensed spectrum for handover, including:

8. The method of claim 5, wherein

The target unlicensed spectrum is an idle unlicensed spectrum with the best performance among the spectrum segments within the acceptable range of the terminal itself;

A terminal for optimizing the use of a spectrum resource, wherein the terminal comprises: a monitoring module and a switching module; wherein

The switching module is configured to: after receiving the trigger information of the monitoring module, according to the performance of the currently monitored spectrum segment within the self-acceptable range, the non-authorization in the spectrum segment within the self-acceptable range In the spectrum, the target unlicensed spectrum of the handover is determined and switched to the determined target unlicensed spectrum.

10. The terminal of claim 9, wherein:

The monitoring module is further configured to: after the switch to the determined target unlicensed spectrum, detect the authorized terminal corresponding to the target unlicensed spectrum in real time, and trigger the handover when determining that the authorized terminal corresponding to the target unlicensed spectrum needs to be accessed. Module

The switching module is further configured to: after receiving the trigger information of the monitoring module, determine, according to the performance of the currently monitored spectrum segment within the range of its own acceptable range, from the unlicensed spectrum in the spectrum segment within its own acceptable range. Switch the new target unlicensed spectrum and switch to the determined new target unlicensed spectrum.