WO2012068964A1

WO2012068964A1 - Method and apparatus for switching spectrum resource bearing unicast service

Info

Publication number: WO2012068964A1
Application number: PCT/CN2011/082291
Authority: WO
Inventors: 刘星; 李岩; 苟伟; 赵楠; 李峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-11-23
Filing date: 2011-11-16
Publication date: 2012-05-31
Also published as: CN102480686B; CN102480686A

Abstract

Disclosed is a method for switching spectrum resources bearing unicast service. An evolved Node B (eNB) collects statistics of currently available spectrum resources when the remaining spectrum resources do not meet the requirements of multimedia broadcast multicast service (MBMS); and switches the unicast service of a user equipment (UE) with cognitive radio function to a borrowable frequency band when the currently available spectrum resources satisfy the MBMS requirements. Also disclosed is an apparatus for addressing the MBMS resource requirements. Through the scheme of the present invention, a long term evolution system can obtain sufficient spectrum resources to support MBMS operation, thereby avoiding the problem of the entire multimedia broadcast multicast service single frequency network (MBSFN) area unable to provide MBMS due to insufficient spectrum resources of a certain eNB, thus improving MBMS user experience.

Description

Method and device for carrying spectrum resource switching of unicast service

The present invention relates to a wireless communication technology, and in particular, to a method and apparatus for switching a spectrum resource of a unicast service. Background technique

Long Term Evolution version 9 (LTE R9) supports Multimedia Broadcast Multicast Service (MBMS) transmission. In a multimedia broadcast multicast service single frequency network (MBSF) area, an enhanced base station (eNB) obtains transmission data from a multimedia broadcast multicast service gateway (MBMS GW). , providing MBMS service services for user equipment (UE, User Equipment). Within the coverage of the eNB, the unicast service and the MBMS service share the allocated spectrum resources, which are ultimately used by each operator for Long Term Evolution/Advanced Long Term Evolution (LTE/LTE-A, Long Term Evolution/Long Term Evolution- The spectrum resources of the system are very limited. As the unicast service continues to develop, it is likely that when the network side triggers the MBMS service, an eNB does not have enough spectrum resources to run the MBMS service. On the other hand, in the current protocol, if there is no spectrum resource in any MBSFN area, the MBMS service cannot be performed in the entire MBSFN area. In the MBSFN area, the probability that an eNB with a certain hot spot has insufficient unicast traffic and insufficient spectrum resources to satisfy the MBMS service status is very high, which greatly reduces the feeling of the MBMS user. Summary of the invention

In view of this, the main purpose of the present invention is to provide a spectrum resource for carrying a unicast service. The method and device for switching avoid the problem that the MBSS service cannot be provided in the entire MBSFN area because the spectrum resources of an eNB are insufficient.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides a method for carrying a unicast service spectrum resource switching, the method includes: eNB, when the remaining spectrum resource does not meet the MBMS service requirement, statistics the currently allowed spectrum resource;

When the currently allowed spectrum resource satisfies the MBMS service requirement, the unicast service of the UE having the Cognitive Radio (CR) function is switched to the borrowable frequency band.

In the above solution, the spectrum resource currently allowed to be provided by the statistic is: The eNB evaluates the spectrum resource that is allowed to be released by switching the unicast service, and sums the remaining spectrum resource to obtain the currently allowed spectrum resource.

In the above solution, the spectrum resource that is allowed to be released by switching the unicast service is: the eNB counts the number of UEs that have its own CR function, and the spectrum resources occupied by the unicast services of each CR-enabled UE, and obtains the CR. The total number of spectrum resources occupied by the unicast service of the functioning UE; and, the eNB obtains the currently allowed borrowed band spectrum resource status information, and statistics the spectrum resources allowed to be borrowed by the borrowing band, according to the unicast service of the CR-enabled UE The total number of occupied spectrum resources and the spectrum resources allowed in the borrowable frequency band are obtained, and the spectrum resources allowed to be released by switching the unicast service are obtained.

In the foregoing solution, the CR function includes: supporting working in a borrowed frequency band, supporting adjustment of wireless communication technical parameters, and supporting changing of a working frequency point and a frequency band.

In the foregoing solution, the method further includes: when the currently allowed spectrum resource does not meet the MBMS service requirement, the eNB feeds back to the network side that the resource does not support the MBMS service.

In the above solution, the method further includes: when the currently allowed spectrum resource is greater than the MBMS service requirement, the eNB performs selective switching according to the degree of attribute matching between the unicast service of the UE having the CR function and the allowed borrowed frequency band. In the above solution, the allowed borrowing frequency band includes at least one of the following frequency bands: a TV band white space (TVWS, TV White Spaces) frequency band, and a global mobile communication system (GSM, Global System for Mobile Communications) S idle frequency band.

The device provides a device for switching the spectrum resource of the unicast service, and the device includes: a statistics module and a switching module, where

The statistics module is configured to: when the remaining spectrum resources do not meet the MBMS service requirements, collect the currently allowed spectrum resources, and send the data to the switching module;

The switching module is configured to switch the unicast service of the CR-enabled UE to the allowed borrowed frequency band when the currently allowed spectrum resource satisfies the MBMS service requirement.

In the above solution, the statistic module is specifically configured to evaluate the spectrum resources that are allowed to be released by switching the unicast service, and sum and the remaining spectrum resources to obtain the currently allowed spectrum resources.

In the above solution, the switching module is further configured to feed back the resource-free MBMS service to the network side when the currently allowed spectrum resource does not meet the MBMS service requirement.

In the foregoing solution, the switching module is further configured to perform selective switching according to the degree of attribute matching between the unicast service of the CR-capable UE and the allowed borrowed frequency band when the currently allowed spectrum resource is greater than the MBMS service requirement.

The present invention provides a method and apparatus for carrying a unicast service spectrum resource handover. When the remaining spectrum resources do not meet the requirements of the MBMS service, the eNB currently allows the provision of spectrum resources. When the spectrum resources are currently allowed to meet the MBMS service requirements, The unicast service of the CR-enabled UE is switched to allow the borrowing of the frequency band. In this way, the LTE system can obtain sufficient spectrum resources to support the MBMS service, and avoid the MBMS service cannot be provided in the entire MBSFN area due to insufficient spectrum resources of an eNB. The problem is to improve the feelings of MBMS users. DRAWINGS

FIG. 1 is a schematic flowchart of a method for implementing switching of a spectrum resource of a unicast service according to the present invention; 2 is a schematic diagram of scheduling the unicast service in the spectrum resource required by the MBMS service to the remaining spectrum resource except the spectrum resource required by the MBMS service in the prior art;

3 is a schematic diagram of performing unicast service switching when there is a unicast service of a UE that does not have a CR function in a spectrum resource required by the MBMS service according to the present invention;

4 is a schematic diagram of performing unicast service switching when the current spectrum resource is not required to meet the MBMS service requirement;

FIG. 5 is a schematic structural diagram of an apparatus for implementing switching of a spectrum resource of a unicast service according to the present invention. detailed description

The basic idea of the present invention is: When the remaining spectrum resources do not meet the requirements of the MBMS service, the eNB is currently allowed to provide the spectrum resources. When the spectrum resources are currently allowed to meet the MBMS service requirements, the unicast service of the CR-enabled UE is switched to Allow borrowing of frequency bands.

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

The present invention implements a method for carrying spectrum resource switching of a unicast service. As shown in FIG. 1, the method includes the following steps:

Step 101: The network side triggers the MBMS service, and notifies each eNB in the MBSFN to prepare for the MBMS service transmission;

Here, the content notified by the network side to each eNB includes at least: a multicast subframe configuration parameter, a start time, and an overlay parameter.

Step 102: When the eNB determines that the remaining spectrum resources do not meet the MBMS service requirements, the eNB calculates the spectrum resources that are currently allowed to be provided.

Specifically, the eNB determines, according to the multicast subframe configuration parameter that is notified by the network side, whether the remaining spectrum resource meets the MBMS service requirement. If not, the eNB evaluates the spectrum resource that is allowed to be released by switching the unicast service, and obtains the remaining spectrum resource. And obtaining the spectrum resources that are currently allowed to be provided; the spectrum resources that are allowed to be released by switching the unicast service are generally: The number of the UEs having the CR function, and the spectrum resources occupied by the unicast services of the UEs having the CR function, obtaining the total number of spectrum resources occupied by the unicast service of the CR-enabled UE; and, the eNB acquires the spectrum of the currently allowed borrowed band The resource status information, the statistics permitting the borrowing of the spectrum resources allowed by the frequency band, the total number of spectrum resources occupied by the unicast service of the CR-enabled UE, and the spectrum resources allowed by the allowed borrowed frequency band, obtained by switching the unicast The spectrum resource that is allowed to be released by the service, that is, when the total number of spectrum resources occupied by the unicast service of the UE having the CR function is greater than the spectrum resource allowed by the allowed borrowed frequency band, the spectrum resource allowed by the allowed borrowed frequency band is switched. The unicast service of the CR-enabled UE when the total number of spectrum resources occupied by the unicast service of the UE having the CR function is less than or equal to the spectrum resource allowed by the allowed borrowed frequency band. The total number of spectrum resources occupied is the spectrum resources allowed to be released by switching unicast services. ;

The CR function includes at least: supporting working in a borrowed frequency band; supporting adjustment of wireless communication technical parameters, such as modulation type, transmission power, etc.; supporting changing of working frequency points and frequency bands;

The allowed borrowed frequency band includes at least one of the following frequency bands: a TVWS frequency band, or a GSM idle spectrum frequency band;

The obtaining the currently allowed borrowing of the spectrum resource status information may be obtained by accessing the database of the stored spectrum resource status information or performing the full-band sensing acquisition in the borrowing frequency band. In this step, if the requirement is met, the MBMS is implemented through the existing scheduling. The service is sent, and the process ends; the existing scheduling, as shown in FIG. 2, scheduling the unicast service in the spectrum resource required by the MBMS service to the remaining spectrum resource other than the spectrum resource required by the MBMS service, the unicast service The occupied spectrum resources are represented by the grid box in Figure 1, and the remaining spectrum resources are represented by blank boxes.

Step 103: When the currently allowed spectrum resource meets the MBMS service requirement, the eNB switches the unicast service of the UE with the CR function to the allowed borrowing frequency band;

Specifically, the eNB determines that the current provision is allowed according to the multicast subframe configuration parameter notified by the network side. Whether the spectrum resource meets the requirements of the MBMS service, and when the currently allowed spectrum resource satisfies the MBMS service requirement, the eNB switches the unicast service of the CR-enabled UE to the allowed borrowed frequency band;

The step further includes: when there is a unicast service of the UE that does not have the CR function in the spectrum resource required by the MBMS service, the eNB switches the unicast service of the CR-enabled UE to the allowed borrowing frequency band, and also needs the MBMS service. The unicast service of the UE that does not have the CR function in the spectrum resource is switched to the white space resource resource other than the spectrum resource required by the MBMS service, and the white space spectrum resource includes the spectrum resource vacated by the unicast service of the UE with the CR function. And the remaining spectrum resources, as shown in FIG. 3, the spectrum resources occupied by the unicast service of the UE having no CR function are represented by a grid box, and the spectrum resources occupied by the unicast service of the UE having the CR function are represented by black boxes. , the remaining spectrum resources are indicated by blank boxes;

The step further includes: when the current allowed spectrum resource does not meet the MBMS service requirement, the eNB feeds back to the network side that the resource does not support the MBMS service; as shown in FIG. 4, the UE that does not have the CR function in the spectrum resource required by the MBMS service There are three unicast services, one for the CR-capable UE, and one for the CR-capable UE unicast service and one remaining spectrum resource in addition to the required spectrum resources of the MBMS service. After the unicast service is switched to allow the borrowing of the frequency band, the unicast service of the UE that does not have the CR function in the spectrum resource required by the MBMS service can only have two blank spectrum resources that can be switched to other than the spectrum resources required by the MBMS service. The eNB will not be able to meet the requirements of the MBMS service, and the eNB will feed back to the network side without resources to support the MBMS service. The network side includes at least: a cell-based cooperative entity (MCE, Multi-cell/multicast Coordination Entity), and a broadcast multicast service center (BMSC, Broadcast- Multicast - Service Centre), MBMS Gateway (MBMS GW, MBMS GateWay).

The step further includes: when the currently allowed spectrum resource is greater than the MBMS service requirement, the eNB matches the unicast service of the UE with the CR function and the attribute of the allowed borrowed frequency band. The degree of selective switching, that is, the unicast service of the CR-capable UE with a high degree of matching is selected to be switched to the allowed borrowing frequency band; the attributes include: service start and stop time, geographical characteristics, or restrictions on the service of the borrowed frequency band; The information about the currently allowed borrowed band spectrum resource status obtained by the eNB includes, in addition to the frequency and frequency band information of the allowed borrowing frequency band, the following: the starting and ending time, the coverage range, and the maximum allowed transmitting power allowed for the borrowed frequency band to be borrowed. When the selective handover is to be performed according to the degree of matching, the eNB measures the attributes of the unicast service of the CR-enabled UE, and selects a handover with a higher degree of matching with the above-mentioned allowed borrowed band spectrum resource status information. For example, when the eNB uses the start and end time as the parameter for judging the matching degree, the start and end time of the borrowing allowed for the borrowed frequency band and the start and end time of the unicast service of the CR-enabled UE are determined, that is, the matching degree is allowed. The time period in which the borrowed frequency band is allowed to be borrowed is greater than the time period occupied by the unicast service, thereby reducing the possibility of the unicast service being switched again.

In order to implement the foregoing method, the present invention further provides a device for carrying a unicast service spectrum resource switching, and the device is disposed in each eNB. As shown in FIG. 5, the device includes: a statistics module 51, a switching module 52, where

The statistic module 51 is configured to: when the remaining spectrum resources do not meet the MBMS service requirements, the spectrum resources that are currently allowed to be provided are sent to the switching module 52;

The switching module 52 is configured to switch the unicast service of the CR-enabled UE to the allowed borrowing frequency band when the currently allowed spectrum resource satisfies the MBMS service requirement;

The statistic module 51 collects the currently allowed spectrum resources, and specifically: the statistic module 51 evaluates the spectrum resources that are allowed to be released by switching the unicast service, and sums the remaining spectrum resources to obtain the currently allowed spectrum resources;

The statistic module 51 evaluates the spectrum resources that are allowed to be released by switching the unicast service. Generally, the statistic module 51 counts the number of UEs with CR functions and the spectrum resources occupied by the unicast services of the UEs with CR functions. Obtaining the total number of spectrum resources occupied by the unicast service of the CR-enabled UE; and, the statistics module 51 acquires the currently allowed borrowed frequency band spectrum resource. The status information, the statistics permit the borrowing of the spectrum resources allowed by the frequency band, the total number of spectrum resources occupied by the unicast service of the UE with the CR function, and the spectrum resources allowed by the allowed borrowed frequency band, and the release of the unicast service is allowed to be released. Spectrum resources;

When there is a unicast service of the UE that does not have the CR function in the spectrum resource required by the MBMS service, the switching module 52 is further configured to switch the unicast service of the UE with the CR function to the allowed borrowing frequency band, and also the MBMS. The unicast service of the UE that does not have the CR function in the spectrum resource of the service is switched to the white space resource other than the spectrum resource required by the MBMS service; the switching module 52 is further configured to not satisfy the MBMS in the currently allowed spectrum resource. When the service needs, feedback to the network side that there is no resource to support the MBMS service;

The switching module 52 is further configured to: when the currently allowed spectrum resource is greater than the MBMS service requirement, perform selective switching according to the attribute matching degree of the unicast service of the UE with the CR function and the allowed borrowed frequency band, that is, select the matching degree. The unicast service of the high CR-capable UE is switched to allow the borrowing of the frequency band; the attributes include: the start and end time of the service, the geographical characteristics, or the restrictions on the services allowed by the borrowed frequency band.

With the method of the present invention, the LTE system can obtain sufficient system spectrum resources to support the transmission of its MBMS service, avoiding the problem that the MBSS service cannot be provided in the entire MBSFN area due to insufficient spectrum resources of an eNB, and improving the MBMS user. Feel.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method for carrying a unicast service spectrum resource handover, the method comprising: the base station (eNB), when the remaining spectrum resources do not meet the requirements of the multimedia broadcast multicast service (MBMS), statistics the currently allowed spectrum resources. ;

When the currently allowed spectrum resource satisfies the MBMS service requirement, the unicast service of the cognitive radio (CR)-enabled user equipment (UE) is switched to the allowed borrowed frequency band.

The method according to claim 1, wherein the statistic currently allowed to provide the spectrum resource is: the eNB evaluates the spectrum resource that is allowed to be released by switching the unicast service, and sums the remaining spectrum resource to obtain The spectrum resources currently allowed to be provided.

The method according to claim 2, wherein the spectrum resource that is allowed to be released by switching the unicast service is: the eNB counts the number of UEs that have a CR function, and the UEs each having the CR function. The unicast service occupies the spectrum resource, and obtains the total number of spectrum resources occupied by the unicast service of the CR-capable UE; and the eNB obtains the spectrum information of the currently allowed borrowed band spectrum resource, and statistics the spectrum resources allowed to be borrowed by the borrowed band. The total number of spectrum resources occupied by the unicast service of the UE having the CR function, and the spectrum resources allowed to be provided by the allowed borrowed frequency band, obtain spectrum resources that are allowed to be released by switching the unicast service.

The method according to claim 1, wherein the CR function comprises: supporting operation in a borrowed frequency band, supporting adjustment of wireless communication technical parameters, and supporting changing of a working frequency point and a frequency band.

The method according to claim 1, wherein the method further comprises: when the currently allowed spectrum resource does not meet the MBMS service requirement, the eNB feeds back to the network side that the resource-free MBMS service is supported.

The method according to claim 1, wherein the method further comprises: when the currently allowed spectrum resource is greater than the MBMS service requirement, the eNB according to the unicast service of the CR-enabled UE and the attribute of the allowed borrowed frequency band The degree of matching is selectively switched.

The method according to any one of claims 1 to 6, wherein the allowed borrowing frequency band comprises at least one of the following frequency bands: a television band white space spectrum (TVWS) frequency band, a global mobile communication system (GSM) idle spectrum Frequency band.

A device for carrying a spectrum resource switching of a unicast service, the device comprising: a statistics module, a switching module, wherein

The device according to claim 8, wherein the statistic module is specifically configured to evaluate a spectrum resource that is allowed to be released by switching a unicast service, and sums the remaining spectrum resource to obtain a spectrum resource that is currently allowed to be provided. .

The device according to claim 8, wherein the switching module is further configured to feed back to the network side that the MBMS service is not supported by the network side when the currently allowed spectrum resource does not meet the MBMS service requirement.

The device according to claim 8, wherein the switching module is further configured to: according to the unicast service and the allowed borrowed frequency band of the UE with CR function when the currently allowed spectrum resource is greater than the MBMS service requirement The degree of attribute matching is selectively switched.