WO2013000252A1

WO2013000252A1 - Method and device for dynamically sharing spectrum resources

Info

Publication number: WO2013000252A1
Application number: PCT/CN2011/084091
Authority: WO
Inventors: 沈正辉; 窦建武; 姚强; 郝瑞晶
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-29
Filing date: 2011-12-15
Publication date: 2013-01-03
Also published as: CN102857926A

Abstract

Disclosed are a method and device for dynamically sharing spectrum resources. The method comprises: pre-determining multiple spectrum resources to be shared, each spectrum resource belonging to a different cell; evaluating total uplink and downlink interference from other cells suffered by each spectrum resource; determining whether the total uplink interference and the total downlink interference are each less than a first predetermined threshold, and when it is determined that the total uplink interference and the total downlink interference are each less than the first predetermined threshold, allocating the spectrum resource. In the present invention, the interference suffered by the spectrum resources is evaluated, thereby further improving the utilization of the spectrum of the network.

Description

Method and device for realizing dynamic spectrum resource sharing

The present invention relates to communication technologies, and in particular, to a method and apparatus for implementing dynamic spectrum resource sharing. Background technique

Spectrum resources are the foundation of wireless communication technology, and continuously improving spectrum efficiency is the core driving force for the development of wireless communication technology.

In recent years, with the rapid development of wireless communication technology, 2G (2nd Generation), 3G (2rd Generation), 4G (4th Generation) multi-network convergence has become a future development trend. Operators have 2G, 3G, and even 4G operating licenses. In the case of limited spectrum resources, flexible and efficient spectrum resource allocation must be adopted to improve spectrum efficiency and increase operating revenue.

The traditional fixed spectrum resource allocation method lacks flexibility and the spectrum utilization rate is low. However, the existing dynamic spectrum resource allocation only moves the spectrum resources in time or according to the service priority. It still lacks flexibility and does not realize real. Dynamic spectrum resource sharing in the sense. Summary of the invention

In view of the above analysis, the present invention aims to provide a method and apparatus for realizing dynamic spectrum resource sharing, which solves the problem of lack of flexibility of the existing dynamic spectrum resource sharing method.

The object of the present invention is mainly achieved by the following technical solutions:

The present invention provides a method for implementing dynamic spectrum resource sharing, including:

Determining a plurality of pieces of spectrum resources that need to be shared, and each piece of spectrum resources belongs to a different cell; Each segment of the spectrum resource is evaluated by the uplink and downlink total interference of other cells; determining whether the total uplink interference and the downlink interference are both smaller than the first predetermined threshold, and allocating the spectrum resource to the segment when the determination is less than the first predetermined threshold.

The method further includes:

When it is determined that the unevenness is less than the first predetermined threshold, the system is switched to reduce the interference; and it is determined again whether the total uplink and downlink interference after the interference reduction is less than the first predetermined threshold, and if yes, the spectrum resource is allocated, otherwise Assigned.

The uplink total interference of the spectrum resources received by the other cells is obtained by: for each mobile terminal that uses the spectrum resource in the other cell, measuring the downlink receiving level of the cell in the mobile terminal and the spectrum resource sharing cell;

Calculating the uplink transmit power of the mobile terminal = the known transmit power of the cell in which the mobile terminal is located - the downlink receive level of the cell in which the mobile terminal is reported + the known uplink receive power of the cell in which the mobile terminal is located;

Calculating the uplink interference of the mobile terminal to the spectrum resource of the segment=the downlink receiving power of the spectrum resource sharing cell reported by the mobile terminal, the known broadcast control channel carrier frequency transmitting power of the spectrum resource sharing cell, and the uplink transmission of the mobile terminal Power

The uplink interferences of all the mobile terminals using the spectrum resources of the other cells are added, and the uplink total interference of the spectrum resources of the other cells is obtained.

The downlink total interference of the spectrum resources received by the other cells is obtained by: obtaining, for each mobile terminal in the spectrum resource sharing cell, a downlink receiving level of each of the other cells using the spectrum resource;

Calculating the downlink interference of the spectrum resource of the segment by other cells = the transmit power of other cells using the segment of the spectrum resource, and the downlink receive level of other cells reported by the mobile terminal - the known broadcast control channel carrier frequency transmit power of other cells;

Adding downlink interferences of all other cells using the spectrum resource to obtain the spectrum Resources are subject to downlink total interference from other cells.

The method further includes:

When a mobile terminal accesses or cuts in, the shared frequency resource is evaluated by the uplink or downlink interference of the access or the cut-in mobile terminal, and it is determined whether the uplink and downlink interferences are all smaller than the second predetermined threshold, and the determination is smaller than the second predetermined. At the threshold, access or cut-in is allowed.

The method further includes:

When it is determined that the unevenness is less than the second predetermined threshold, the interference is reduced by the system switching;

It is judged again whether the total uplink interference and the downlink interference after the interference reduction are less than a predetermined threshold. If yes, the mobile terminal is allowed to access or cut in, otherwise the access or the handover is denied.

The uplink interference of the shared spectrum resource that is accessed or cut into the mobile terminal is obtained by:

Measure the downlink receiving level of the cell that is accessed or cut into the cell where the mobile terminal is located and the other cell shared by the shared spectrum resource;

Calculating the uplink transmit power of the access or handover to the mobile terminal = the known transmit power of the cell in which the mobile terminal is connected or cut-in - the downlink reception level of the cell in which the mobile terminal is located or switched in + the access or handover into the mobile terminal The uplink receiving power of the cell itself;

Calculating the uplink interference of the access or handover mobile terminal to the spectrum resource of the segment=the downlink reception power of the other cell that is connected to the mobile terminal and shared with the shared spectrum resource, and the other common site of the shared spectrum resource The known broadcast control channel carrier frequency transmit power of the cell + the uplink transmit power of the access or handover to the mobile terminal.

The downlink interference of the shared spectrum resource that is accessed or cut into the mobile terminal is obtained by:

Each mobile terminal in another cell co-sited with the shared spectrum resource measures the downlink receiving level of the cell in which the access or the mobile terminal is located;

Calculating the downlink interference of the shared spectrum resource subject to the access or handover to the cell where the mobile terminal is located= The downlink transmission power of the traffic channel currently connected to or cut into the mobile terminal + the downlink reception level of the cell where the mobile terminal is connected or cut into the mobile terminal measured by the mobile terminal shared by the shared spectrum resource - the access Or cutting into the broadcast control channel carrier frequency transmission power of the cell where the mobile terminal is located;

The other cells co-sited with the shared spectrum resource are added by the downlink interference of the access or the handover to the mobile terminal, and the downlink interference of the shared spectrum resource by the access or the handover to the mobile terminal is obtained.

The present invention also provides an apparatus for implementing dynamic spectrum resource sharing, including:

a spectrum resource determining unit, configured to predetermine a plurality of pieces of spectrum resources that need to be shared, and each piece of spectrum resources belongs to a different cell;

The interference assessment unit is configured to evaluate each of the spectrum resources by the uplink and downlink total interference of other cells;

The determining processing unit is configured to determine whether the total uplink interference and the downlink interference are both smaller than the first predetermined threshold, and allocate the spectrum resource to the segment when determining the parity d.

The determining processing unit is further configured to: when the determining that the unevenness is less than the first predetermined threshold, reduce the interference by the system switching; and determine again whether the total uplink and downlink interference after the interference reduction is less than the first predetermined threshold, and if yes, The spectrum resources of this section will be allocated, otherwise they will not be allocated.

The interference assessment unit is further configured to: when a mobile terminal accesses or cuts in, the frequency resource is affected by uplink or downlink interference of accessing or cutting into the mobile terminal;

The determining processing unit is further configured to determine whether the uplink and downlink interferences are all less than a second predetermined threshold, and allow access or hand-in when the determination is less than the second predetermined threshold.

The determining processing unit is further configured to: when the determining that the unevenness is less than the second predetermined threshold, reduce the interference by the system switching; and determine again whether the total uplink and downlink interference after the interference reduction is less than a predetermined threshold, and if yes, allow the mobile The terminal accesses or cuts in, otherwise it refuses to access or cut in.

The beneficial effects of the present invention are as follows:

The invention further improves the utilization of network spectrum by evaluating the interference of spectrum resources Rate.

Other features and advantages of the invention will be set forth in the description in the description which follows. DRAWINGS

1 is a schematic flow chart of a first method embodiment of the present invention;

2 is a schematic flow chart of a second method embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings in which FIG.

First, the method according to the embodiment of the present invention will be described in detail with reference to FIG.

In order to facilitate the understanding of the present invention, the following will evaluate GSM in the case of dynamic spectrum resource sharing using Global System for Mobile Communications (GSM) and Wideband Code Division Multiple Access (WCDMA) dual-mode systems. The uplink and downlink interference of the WCDMA network is taken as an example for description.

As shown in FIG. 1 , FIG. 1 is a schematic flowchart of a first method embodiment of the present invention, which may specifically include the following steps:

Step 101: GSM determines a multi-segment spectrum resource that needs to be shared (each spectrum resource belongs to a different GSM cell);

Step 102: Evaluate each segment of the spectrum resource by the uplink and downlink total interference of other GSM cells;

The following (1) to (7) are specific processes for evaluating the uplink and downlink total interference of each spectrum resource by other GSM cells (one or more), where (1) to (4) are each spectrum resource. The evaluation process of uplink total interference from other GSM cells, (5) to (7) for each spectrum The evaluation process of resources being subject to downlink total interference of other GSM cells;

(1) It is assumed that a mobile terminal in a certain other GSM cell uses a frequency point on the spectrum resource, and it measures that the downlink receiving levels of the GSM cell and the spectrum resource sharing cell are DlRxLevel and DlRxLevel2, respectively;

(2) Calculating the uplink transmit power UlTxPw of the mobile terminal according to the transmit power DlTxPw of the GSM cell itself, the uplink receive power UlRxLevd, and the downlink receive level DlRxLevd measured in (1):

UlTxPw = DlTxPw - DlRxLevel + UlRxLevel;

(3) The carrier transmit power of the broadcast control channel (BCCH, Broadcast Control Channel) of the known spectrum resource sharing cell is D1TxPw2, and the downlink received power of the spectrum resource shared cell on the mobile terminal is DlRxLevd2, and the calculation is performed. The mobile terminal's uplink interference MS_INT for the segment spectrum resource:

MS—INT = DlRxLevel2 - DlTxPw2 + UlTxPw

(4) Adding the uplink interferences of all the mobile terminals of the other GSM cells using the spectrum resources, and obtaining the uplink total interference of the spectrum resources of the other GSM cells.

(5) A mobile terminal under the GSM cell of the spectrum resource (relative to other GSM cells, the GSM cell to which the spectrum resource originally belongs), which measures the downlink of other GSM cells using the same spectrum resource as the segment. The receiving level is DlRxLevel3;

(6) It is known that the BCCH carrier frequency transmission power of other GSM cells is DlTxPw3, and the transmission power of other cells using the spectrum resource is DlTxPw, so the specific size of downlink interference of other GSM cells received by the spectrum resource is:

BTS_INT = DlTxPw + DlRxLeve - DlTxPw3;

(7) Adding the downlink interferences of all other GSM cells using the spectrum resource, that is, the downlink interference level of the spectrum resources of the other GSM cells can be obtained;

Step 103: For each spectrum resource, determine whether the total uplink and downlink interferences of other GSM cells are less than a first predetermined threshold (including upper and lower thresholds, threshold size) Generally, it can be determined according to the empirical value), if yes, step 104 is performed, otherwise step 105 is performed; step 104: the spectrum resource is allocated to the segment;

Step 105: Notifying the GSM system that the interference is too large, triggering the GSM system handover, to reduce the interference of the spectrum resource; for example, the mobile terminal that uses the spectrum resource of another GSM cell may be handed over to the cell that does not use the spectrum resource; Then, it is determined again whether the uplink or downlink total interference of the spectrum resource is smaller than the first predetermined threshold, if yes, go to step 104, otherwise go to step 106;

Step 106: The spectrum resources of the segment are not allocated.

As shown in FIG. 2, FIG. 2 is a schematic flowchart of a second method embodiment of the present invention, which may specifically include the following steps:

Step 200: The GSM mobile terminal initiates a service request (or a hand-in request) to the network, and the shared dynamic spectrum resource exists in the network;

Step 201: Evaluating uplink and downlink interference of the shared spectrum resource to the access or handover mobile terminal;

The following 1 to 6 are specific processes for evaluating the uplink and downlink interference of the shared spectrum resource to the mobile terminal, where 1 to 3 are the uplink total interference of the shared spectrum resource received by the access or the mobile terminal. The evaluation process, 4 to 6 is an evaluation process in which the shared spectrum resource is subjected to downlink interference of the access or handover into the mobile terminal.

1 The downlink receiving levels of the GSM cell in which the cell is located and the shared spectrum resource shared with the mobile terminal are DlRxLevel4 and DlRxLevd5, respectively;

2 Calculate the uplink transmit power of the mobile terminal, UlTxPw4, according to the transmit power DlTxPw4, the uplink receive power UlRxLevel4, and the DlRxLevel4 in the GSM cell where the mobile terminal is connected or cut into:

UlTxPw4 = DlTxPw4 - DlRxLevel4 + UlRxLevel4;

3 BCCH carrier frequency transmit power known from the GSM cell co-sited with the shared spectrum resource DlTxPw5, the access power DlRxLevd5 of the GSM cell co-sited with the shared spectrum resource reported by the mobile terminal is input or cut, and the uplink interference of the access or handover mobile terminal to the shared spectrum resource is calculated:

MS_INT = DlRxLevel5 - DlTxPw5 + UlTxPw;

4, the mobile terminal under the GSM cell sharing the spectrum resource co-site measured the downlink receiving level of the cell in which the access or the mobile terminal is located is DlRxLevel6;

5 according to the BCCH carrier frequency transmission power D1TxPw6 of the cell in which the mobile terminal is located, or the downlink transmission power D1TxPw4 of the traffic channel currently located in the mobile terminal, and the shared spectrum resource is calculated by the access or the mobile terminal in the cell where the mobile terminal is located. Downside interference:

BTS_INT = DlTxPw4 + DlRxLevel6 - DlTxPw6;

6 Adding the GSM cell shared by the shared spectrum resource to the downlink interference of the access or handover to the mobile terminal, and obtaining the downlink interference of the shared spectrum resource by the access or the handover into the mobile terminal.

Step 203: Determine whether the shared spectrum resource is subjected to the uplink or downlink total interference of the access or the handover to the mobile terminal, and the total interference is less than a second predetermined threshold (including upper and lower thresholds, and the threshold size may generally be determined according to an empirical value). If yes, go to step 204, otherwise go to step 205; Step 204: Allow access or cut-in;

Step 205: Notifying the GSM system that the interference is too large, triggering the GSM system to switch to reduce the interference of the spectrum resource. After reducing the interference, determining whether the shared spectrum resource is less than the total uplink and downlink interference of the access or the cut-in mobile terminal. Second predetermined threshold, if yes, step 204 is performed, otherwise step 206 is performed;

Step 206: Deny access or cut in.

Next, the device according to the embodiment of the present invention will be described in detail with reference to FIG.

As shown in FIG. 3, FIG. 3 is a schematic structural diagram of an apparatus according to an embodiment of the present invention. a spectrum resource determining unit, configured to predetermine a plurality of pieces of spectrum resources that need to be shared; and an interference estimating unit, configured to evaluate each piece of spectrum resources from uplink and downlink total interference of other cells;

The determining processing unit is configured to determine whether the total uplink and downlink interferences are all less than the first predetermined threshold, and if the threshold is less than the predetermined threshold, allocate the spectrum resource to the segment; otherwise, reduce the interference by the system switching, and determine the interference reduction again. Whether the total downlink interference is less than the first predetermined threshold. If yes, the spectrum resources of the segment are allocated, otherwise they are not allocated.

When a mobile terminal accesses or cuts in, the interference assessment unit evaluates the uplink frequency interference of the segment of the frequency resource by the access or the cut-in mobile terminal; the determining processing unit determines whether the uplink and downlink interferences are all smaller than the second predetermined threshold. If it is less than the second predetermined threshold, access or cut-in is allowed; otherwise, the interference is reduced by the system switching, and it is determined again whether the total uplink and downlink interference after the interference reduction is less than a predetermined threshold, and if so, the mobile terminal is allowed to access or cut in, Otherwise the access or cut is denied.

The specific implementation process of the device of the present invention has been described in detail in the above method, and therefore will not be described herein.

In the embodiment of the present invention, the GSM and WCDMA dual-mode systems are used to evaluate the uplink and downlink interference of the GSM to the WCDMA network when the dynamic spectrum resources are shared. However, those skilled in the art should also be aware that the embodiments of the present invention are also applicable to Other dual-mode systems share the same in dynamic spectrum resources. The principle is the same and will not be described here.

In summary, the embodiments of the present invention provide a method and a device for implementing dynamic spectrum resource sharing, which further improves the utilization rate of the network spectrum by using the interference of the spectrum resources, and the flexibility is better, and the dynamic spectrum is truly realized. Resource Sharing.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope disclosed by the present invention. Alternatives are intended to be covered by the scope of the present invention. Therefore, this The scope of protection of the invention should be determined by the scope of the claims.

Claims

Claim

A method for realizing dynamic spectrum resource sharing, wherein the method includes: predetermining a plurality of pieces of spectrum resources that need to be shared, and each piece of spectrum resources belongs to different small areas;

Each segment of spectrum resources is evaluated by the total uplink and downlink interference of other cells;

A determination is made as to whether the total uplink interference is less than the first predetermined threshold, and when the determination is less than the first predetermined threshold, the spectrum resource is allocated.

The method according to claim 1, wherein the method further comprises: when determining that the unevenness is less than the first predetermined threshold, reducing the interference by system switching; and re-determining the total uplink and downlink interference after reducing the interference Whether it is less than the first predetermined threshold, if yes, allocate the spectrum resources of the segment, otherwise it will not be allocated.

The method according to claim 1 or 2, wherein the uplink total interference of the spectrum resources by other cells is obtained as follows:

For each mobile terminal that uses the spectrum resource in the other cell, measure the downlink receiving level of the cell in which the mobile terminal is located and the spectrum resource shared cell;

The method according to claim 1 or 2, wherein the downlink total interference of the spectrum resources by other cells is obtained as follows: For each mobile terminal in the spectrum resource sharing cell, the downlink receiving level of each of the other cells using the spectrum resource is measured;

The downlink interferences of all other cells using the spectrum resource are added to obtain the downlink total interference of the spectrum resources of other segments.

The method according to claim 1 or 2, wherein the method further comprises: when a mobile terminal accesses or cuts in, the shared frequency resource is subjected to uplink or downlink interference of accessing or cutting into the mobile terminal. The evaluation determines whether the uplink and downlink interferences are all less than the second predetermined threshold, and allows access or hand-in when the determination is less than the second predetermined threshold.

The method according to claim 5, wherein the method further comprises: when determining that the unevenness is less than the second predetermined threshold, reducing interference by system switching;

7. The method according to claim 5, wherein the uplink interference of the shared spectrum resource being accessed or cut into the mobile terminal is obtained by:

Calculating the uplink interference of the access or handover mobile terminal to the spectrum resource of the segment=the downlink reception power of the other cell that is connected to the mobile terminal and shared with the shared spectrum resource, and the other common site of the shared spectrum resource Cell's known broadcast control channel carrier frequency transmit power + the access Or cut into the uplink transmit power of the mobile terminal.

8. The method according to claim 5, wherein the downlink interference of the shared spectrum resource being accessed or cut into the mobile terminal is obtained by:

Calculating the downlink interference of the shared spectrum resource subjected to the access or handover to the cell where the mobile terminal is located = the downlink transmission power of the traffic channel currently connected to the mobile terminal and the mobile terminal of the other cell sharing the shared spectrum resource The downlink receiving level of the cell in which the mobile terminal is located or cut into the broadcast control channel of the cell in which the mobile terminal is located;

A device for implementing dynamic spectrum resource sharing, the device includes: a spectrum resource determining unit, configured to predetermine a plurality of pieces of spectrum resources that need to be shared, and each piece of spectrum resources belongs to a different cell;

10. Apparatus according to claim 9 wherein:

The determining processing unit is further configured to: when the determining that the unevenness is less than the first predetermined threshold, reduce the interference by the system switching; and determine again whether the total uplink and downlink interference after the interference reduction is less than the first predetermined threshold, and if yes, Segment spectrum resources are allocated, otherwise they are not allocated.

11. Apparatus according to claim 9 or 10, characterized in that

The interference assessment unit is further configured to: when a mobile terminal accesses or cuts in, the segment frequency The resource is evaluated by the uplink and downlink interference of the access or cut into the mobile terminal;

12. Apparatus according to claim 11 wherein:

The determining processing unit is further configured to: when the determining that the unevenness is less than the second predetermined threshold, reduce the interference by the system switching; and determine again whether the total uplink and downlink interference after the interference reduction is less than a predetermined threshold, and if yes, allow the mobile terminal to connect Enter or cut in, otherwise refuse access or cut in.