CN102148638A - Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames - Google Patents
Method, device and system for configuring multicast broadcast single frequency network (MBSFN) sub-frames Download PDFInfo
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Abstract
The invention relates to the field of communication, and discloses a method, a device and a system for configuring multicast broadcast single frequency network (MBSFN) sub-frames, which are used for balancing the data throughput of a long term evolution advanced (LTE-A) system. The method comprises that: a relay node reports MBSFN configuration reference information which is locally configured or downloaded by an operation administration and maintenance (OAM) entity, and a donor E-UTRAN NodeB (DeNB) can acquire the resource need conditions of an access link of the relay node according to the received MBSFN configuration reference information to configure an accurate number of MBSFN sub-frames at accurate positions for the RN. Therefore, the phenomenon of data jamming or small data volume in the system can be avoided, the data capacity of the system can be balanced, and the overall data throughput performance of the system can be further improved effectively. Simultaneously, the invention discloses the DeNB, the RN and a communication system.
Description
Technical field
The present invention relates to the communications field, particularly a kind of collocation method of MBSFN subframe, Apparatus and system.
Background technology
Consult shown in Figure 1, at (the Long Term Evolution Advanced of long-term evolution upgrading system, LTE-A) in the system, user terminal (User Equipment, UE) link the relaying joint by wave point and account for (Relay Node, RN) or donor base station (Donor E-UTRAN NodeB, DeNB).UE and RN, the interface between UE and the DeNB is called the Uu interface.The UE that is connected with RN is called R-UE again, with grand UE of being called of DeNB direct communication.
There are three in the feasible mobile communication system Radio Link based on Relay of the introducing of RN: the direct projection link of DeNB-＞grand UE (direct link), the access link (access link) of the back haul link of DeNB-＞RN (backhaul link) and RN-＞R-UE, consider the signal interference-limited of radio communication, above-mentioned three links need use the Radio Resource of quadrature.
At present, at signal interference problem, its settling mode is to make RN not be transmitted to UE simultaneously when receiving the DeNB data, promptly creates gap ' gaps ' in the transmission time at descending access.(Multicast Broadcast Single Frequency Network, MBSFN) mode of subframe makes RN that ' gaps ' is set can to pass through the multimedia broadcast multi-broadcasting business single frequency network.Consult shown in Figure 2ly, in ' gaps ', UE can not expect to receive the data that RN sends.
Existing MBSFN sub-frame configuration is that (MultimediaBroadcast/Multicast Service MBMS) carries out, and is directly disposed by network side at multimedia broadcast/multi broadcast business.The backhaul resource of RN is shared from DeNB and is obtained, therefore, under the prior art, the most direct configuration mode is the MBSFN subframe of directly being distributed access link by DeNB for RN, perhaps (Operation Administration and Maintenance OAM) directly is RN configuration MBSFN subframe by the Operations, Administration and Maintenance entity with relay function.
Yet under the prior art, there is following defective in the mode of configuration MBSFN subframe:
DeNB can not know accurately that RN needs the size of loaded service amount and the channel quality of access link, and therefore, the MBSFN subframe of distribution might can not satisfy the resource requirement of access link.For example, if backhaul link channel quality is fine, it is also fine that DeNB is defaulted as access link channel quality, then DeNB will distribute 5 MBSFN subframes (DLbackhaul subframe) for RN in a radio frames (10 subframes), and then RN has only 5 subframes to can be used for access link, and this downlink data that might cause DeNB to send to RN can not in time send to R-UE by RN, cause downlink data to be deposited in RN, even packet loss.Otherwise,, may cause being lower than the throughput that expectation reaches to the downlink data amount of R-UE if the access link MBSFN subframe that DeNB is RN to be distributed is seldom.
Summary of the invention
The embodiment of the invention provides a kind of method, Apparatus and system of the MBSFN of distribution subframe, in order to realize the equilibrium of LTE-A system data throughput.
The specific embodiments that present embodiment provides is as follows:
A kind of method that disposes the MBSFN subframe comprises:
DeNB receives the MBSFN sub-frame configuration reference information that RN reports;
DeNB is described RN configuration MBSFN subframe according to the MBSFN sub-frame configuration reference information that receives;
DeNB notifies described RN with configuration result.
A kind of method that disposes the MBSFN subframe comprises:
RN obtains the MBSFN sub-frame configuration reference information at this RN;
Described RN mails to donor base station DeNB with the MBSFN sub-frame configuration reference information that obtains, and indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN configuration MBSFN subframe;
Receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to this configuration result.
A kind of DeNB comprises:
Communication unit is used to receive the MBSFN sub-frame configuration reference information that RN reports;
Dispensing unit is used for according to the described MBSFN sub-frame configuration reference information that receives, and is described RN configuration MBSFN subframe;
Notification unit is used for notifying described RN with configuration result.
A kind of via node comprises:
Acquiring unit is used for RN and obtains MBSFN sub-frame configuration reference information at this RN;
Transmitting element, the MBSFN sub-frame configuration reference information that is used for obtaining mails to donor base station DeNB, indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN configuration MBSFN subframe;
Receiving element is used to receive the configuration result that DeNB returns;
Dispensing unit is used for according to described configuration result MBSFN subframe under this RN being set.
A kind of communication system comprises some DeNB and RN, wherein,
DeNB is used to receive the MBSFN sub-frame configuration reference information that RN reports, and according to described MBSFN sub-frame configuration reference information, is described RN configuration MBSFN subframe, and notifies described RN with configuration result;
RN, be used to obtain MBSFN sub-frame configuration reference information at this RN, and the MBSFN sub-frame configuration reference information that obtains mail to donor base station DeNB, indicate this DeNB according to the MBSFN sub-frame configuration reference information that receives, be this RN configuration MBSFN subframe, and receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to described configuration result.
In sum, in the embodiment of the invention, by RN with this locality configuration or report to DeNB by the MBSFN configuration reference information that OAM downloads, make DeNB can know the resource requirement situation of the access link of RN according to the MBSFN configuration reference information that receives, thereby MBSFN subframe for its configuration accurate quantity and position, thereby avoid occurring in the system data jamming or the low excessively phenomenon of data volume, it is balanced to make the system data capacity realize, and then has effectively improved the overall data throughput performance of system.
Description of drawings
Fig. 1 is LTE-A Solution Architecture figure;
Fig. 2 utilizes the MBSFN subframe to carry out repeated link downlink transfer schematic diagram under the prior art;
Fig. 3 A is a DeNB illustrative view of functional configuration in the embodiment of the invention;
Fig. 3 B is a RN illustrative view of functional configuration in the embodiment of the invention;
Fig. 4 is a configuration MBSFN subframe flow chart in the embodiment of the invention.
Embodiment
For the data throughout that makes the LTE-A system is realized balanced.In the embodiment of the invention, send MBSFN sub-frame configuration reference information by RN to DeNB, DeNB is according to the configuring condition of the MBSFN subframe under this MBSFN sub-frame configuration reference information decision RN, and notice RN.The embodiment of the invention is applicable to the initial configuration and the reprovision of MBSFN subframe.Be specially:
At DeNB, DeNB receives the MBSFN sub-frame configuration reference information that RN reports; DeNB is described RN configuration MBSFN subframe according to the MBSFN sub-frame configuration reference information that receives; DeNB notifies described RN with configuration result.
And at RN, RN obtains the MBSFN sub-frame configuration reference information at this RN; Described RN mails to donor base station DeNB with the MBSFN sub-frame configuration reference information that obtains, and indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN configuration MBSFN subframe; Receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to this configuration result.
MSBSFN subframe under the so-called RN promptly is meant the DL backhaul subframe that is used for downlink transfer between DeNB and the RN.
Be elaborated below in conjunction with the accompanying drawing preferred embodiment of the present invention.
Consult shown in Figure 1ly, in the embodiment of the invention, comprise some DeNB and RN in the LTE-A system, wherein, comprising:
DeNB is used to receive the MBSFN sub-frame configuration reference information that RN reports, and according to described MBSFN sub-frame configuration reference information, is described RN configuration MBSFN subframe, and notifies described RN with configuration result;
RN, be used to obtain MBSFN sub-frame configuration reference information at this RN, and the MBSFN sub-frame configuration reference information that obtains mail to donor base station DeNB, indicate this DeNB according to the MBSFN sub-frame configuration reference information that receives, be this RN configuration MBSFN subframe, and receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to described configuration result.
Consult shown in Fig. 3 A, in the embodiment of the invention, DeNB comprises communication unit 10, dispensing unit 11 and notification unit 12, wherein,
Communication unit 10 is used to receive the MBSFN sub-frame configuration reference information that RN reports;
Dispensing unit 11 is used for according to the described MBSFN sub-frame configuration reference information that receives, and is described RN configuration MBSFN subframe;
Notification unit 12 is used for notifying described RN with configuration result.
Consult shown in Fig. 3 B, in the embodiment of the invention, RN comprises acquiring unit 20, transmitting element 21, receiving element 22 and dispensing unit 23, wherein,
Acquiring unit 20 is used for RN and obtains MBSFN sub-frame configuration reference information at this RN;
Transmitting element 21, the MBSFN sub-frame configuration reference information that is used for obtaining mails to alms giver's fiduciary point DeNB, indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN configuration MBSFN subframe;
Receiving element 22 is used to receive the configuration result that DeNB returns;
Dispensing unit 23 is used for according to described configuration result MBSFN subframe under this RN being set.
Based on the said system framework, to consult shown in Figure 4ly, in the embodiment of the invention, DeNB is that the detailed process of RN configuration MBSFN subframe is as follows:
Step 400:RN sends MBSFN sub-frame configuration reference information to DeNB.
The MBSFN sub-frame configuration reference information that RN sends to DeNB can adopt medium to insert (MediaAccess Control, MAC) layer control command or Radio Resource control (RRC Radio ResourceControl, RRC) mode of layer control command.Can be a kind of or combination in any wherein including but not limited to following information:
The physical resource occupied information of access link (Physical Resource Block, PRB), the professional needed MBSFN sub-frame configuration of MBMS under ratio, RN down buffer storage state and the RN of the MBSFN subframe that is used for descending backhaul (DownLink backhaul, i.e. DL backhaul) of the MBSFN sub-frame number of the channel quality information of access link, RN expectation or access link descending sub frame quantity, RN expectation and access link descending sub frame.
If the Un interface is asynchronous with Uu interface subframe, RN also needs to feed back the timing relationship difference of Un mouth and Uu mouth, can be configured to the MBSFN subframe of access link so which subframe DeNB determines;
On the other hand, RN also needs to preset the special-purpose MBSFN subframe that is used for special purpose and reports to DeNB, as be used for locating, senior multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) special-purpose MBSFN subframe, special-purpose MBSFN subframe of heterogeneous network air interface synchronization position or the like.The MBSFN sub-frame configuration of special use is reported DeNB, and purpose is in order to make DeNB be used for avoiding these special-purpose MBSFN subframes in the MBSFN subframe under the RN of DLbackhaul in configuration.
Step 410:DeNB determines the MBSFN subframe configuration information on this RN access link (being access link) according to MBSFN sub-frame configuration reference information and other information.
Step 420:DeNB is issued to RN with the MBSFN subframe configuration information, and in the present embodiment, DeNB can adopt the RRC signaling to send above-mentioned MBSFN subframe configuration information.
Step 430:RN feeds back the MBSFN subframe configuration information of DeNB, and uses the MBSFN subframe of the Uu interface that DeNB disposed.
In the above-described embodiments, it can be trigger-type that RN reports MBSFN sub-frame configuration reference information, also can be periodic.Report mode to describe in detail respectively to these two kinds below.
1, trigger-type reports.
(1) at physical resource occupied information (PRB):
RN is provided with threshold value x1 and x2, x1＞x2 wherein, and x1 represents the resource occupation height, and x2 represents resource occupation low.
If the PRB of RN statistical average takies quantity greater than x1 or less than x2, then report the PRB occupied information.
The physical resource occupied information specifically reports content to be:
PRB takies quantity, and preferably, this PRB takies the average result that quantity is statistics in the fixed time scope, non-instantaneous value;
The mean P RB of statistics takies the ratio of quantity and PRB sum in the fixed time scope;
Need to increase or reduce the sign of MBSFN sub-frame number, for example, PRB takies then to indicate greater than x1 needs to reduce the MBSFN sub-frame number, and PRB takies can indicate less than x2 increases the MBSFN sub-frame number;
Need to increase or reduce the sign of access link descending sub frame quantity, wherein, PRB takies then to indicate greater than x1 needs to increase access link descending sub frame quantity, and PRB takies can indicate less than x2 and reduces access link descending sub frame quantity.
(2) report the channel quality information of access link:
RN is provided with threshold value x3 and x4, x3＞x4 wherein, and x3 represents channel quality good, and x4 represents bad channel quality.
If the channel quality of RN statistical average greater than x3 or less than x4, then reports the channel quality information of access link.
The content that specifically reports of the channel quality information of access link can be:
The average channel quality parameter of access link, for example, the average of the channel quality of UE and variance, the shared ratio of the UE of different channels quality;
Need to increase or reduce the sign of MBSFN sub-frame number, wherein, the channel quality of access link can increase the MBSFN sub-frame number greater than x3, and the channel quality of access link need reduce the MBSFN sub-frame number less than x4;
Need to increase or reduce the sign of access link descending sub frame quantity, wherein, channel quality can reduce access link descending sub frame quantity greater than x3, and channel quality need increase access link descending sub frame quantity less than x4
(3) MBSFN sub-frame number or the access link descending sub frame quantity that reports RN to expect:
At first, RN is according to the channel quality measurement of back haul link and the channel quality of access link are reported; In conjunction with by the determined data quantity transmitted that needs of the traffic performance of UE under the current RN, estimate the optimum capacity coupling of access link and back haul link, i.e. the resource occupation optimal proportion of back haul link and access link.
Secondly, RN can not satisfy professional transmitted data amount demand in current MBSFN sub-frame number or access link descending sub frame quantity, assessment is thought when can reach better capacity coupling by the adjustment of MBSFN subframe, DeNB is reported the MBSFN sub-frame number or the access link descending sub frame quantity of expectation.
(4) report the MBSFN subframe that is used for DL backhaul of RN expectation and the ratio of access link descending sub frame:
At first, RN is according to the channel quality measurement of back haul link and the channel quality of access link are reported; In conjunction with by the determined data quantity transmitted that needs of the traffic performance of UE under the current RN, estimate the optimum capacity coupling of access link and back haul link, i.e. the resource occupation optimal proportion of back haul link and access link.
Secondly, RN can not satisfy professional transmitted data amount demand in current MBSFN sub-frame number or access link descending sub frame quantity, assessment is thought when can reach better capacity coupling by the adjustment of MBSFN subframe, DeNB is reported the MBSFN subframe that is used for DL backhaul of expectation and the ratio of access link descending sub frame.
(5) report RN down buffer storage state:
RN is provided with thresholding x5 and x6, and wherein, on behalf of the RN down buffer storage, x5＞x6, x5 take height, and it is low that on behalf of the RN down buffer storage, x6 take.
If the average RN down buffer storage of RN statistics then reports RN down buffer storage state greater than x5.After reporting the RN down buffer storage of x5 condition triggering,, then report RN down buffer storage state once more if the down buffer storage amount drops to less than x6 in setting-up time.
The content that specifically reports of RN down buffer storage state can be:
RN down buffer storage state, what this RN down buffer storage state comprised is the average result of statistics in the fixed time scope, non-instantaneous value;
Need to increase or reduce the sign of MBSFN sub-frame number, wherein, the RN down buffer storage is then indicated greater than x5 needs to reduce the MBSFN sub-frame number.Before the MBSFN sub-frame number is adjusted,, then cancel the MBSFN sub-frame number adjustment that the x5 condition triggers if RN down buffer storage state drops to less than x6.
Need to increase or reduce the sign of access link descending sub frame quantity, wherein the RN down buffer storage need increase access link descending sub frame quantity greater than x5; Before the MBSFN sub-frame number is adjusted,, then cancel the access link sub-frame number adjustment that the x5 condition triggers if the RN down buffer storage drops to less than x6.
(6) report the professional needed MBSFN sub-frame configuration of MBMS under the RN.
In the practical application, DeNB is that the MBSFN subframe that is used for access link of RN configuration is not that RN is actual on these subframes to be at the downlink data that receives DeNB for real MBMS business service.And the MBSFN subframe that is used for the MBMS business under RN to be RN send downlink transfer (MBMS transmission) in order to the UE to access link.Therefore DeNB must avoid being actually used in the MBSFN subframe of MBMS business when configuration is used for the MBSFN subframe of access link.
For example, the MBSFN subframe that is used for the MBMS business under the multi-plot joint transmission means is by many cell multicasts coordination entity (Multi-cell/multicast Coordination Entity, MCE) dispose, though this information sends RN to by DeNB, DeNB does not understand this information.RN need report this configuration information to DeNB after MCE is for its configuration MBSFN subframe, DeNB need be actually used in MBSFN sub-frame configuration under the RN of DL backhaul according to this information adjustment.
Again for example, under the uni-cell MBMS transmission means, the MBSFN subframe that is used for the MBMS business is disposed voluntarily by RN, and RN reports DeNB as the MBSFN sub-frame configuration reference that is used for DL backhaul after being identified for the MBSFN sub-frame configuration of MBMS.
(7) report the timing relationship difference of Un interface and Uu interface:
RN reports situation of change when Un mouth and Uu mouth timing relationship change, to guarantee correct configuration and the use of DeNB to the MBSFN subframe.
(8) report the special-purpose MBSFN subframe that is used for special purpose.
Above-mentioned various information, the information of (7) and (8) two types preferably reports in the trigger-type mode.
2, periodically report.
RN regularly reported above-mentioned various types of information in the cycle of DeNB configuration, and the particular content that reports is identical with the description of " trigger-type reports " part, does not repeat them here.
At above-mentioned different MBSFN sub-frame configuration reference information, DeNB has different processing modes.Specifically be described below:
Embodiment one: RN comprises built-in MBSFN sub-frame configuration reference information in the initial operational parameter that reports.
Embodiment one is applicable to MBSFN subframe initial configuration.
At first, RN in RRC connection request or other up RRC message, carries the initial operational parameter of operator's configuration when connecting with DeNB.
These initial operational parameters can be used to indicate this RN to be used for which kind of purposes, as, focus covers, the suburb covers or the like, on the other hand, above-mentioned initial operational parameter can also comprise MBSFN sub-frame number or access link descending sub frame quantity, the perhaps characteristic parameter of RN of RN expectation, as, RN dual-mode antenna number, the RF capabilities of RN, maximum transmitting-receiving speed of RN or the like.
Secondly, initial operational parameter and other information that DeNB reports according to RN, as, grand UE resource requirement, interference coordination requirement etc., the MBSFN subframe under the configuration RN is also used RRC signaling RN.
In the present embodiment, during MBSFN subframe under the DeNB configuration RN, employed algorithm is including but not limited to following content:
1) the MBSFN sub-frame number (being the quantity of DLbackhaul subframe) under the calculation of parameter RN that reports according to RN of DeNB, RN Data Receiving ability is weak more, offside in hot spot coverage, its required MBSFN sub-frame number is many more, otherwise, RN Data Receiving transmitting-receiving ability is strong more, offside in non-hot spot coverage, and the quantity of the MBSFN subframe that it is required is few more.
2) DeNB adjusts the quantity of the MBSFN subframe under the RN according to the resource requirement of the grand UE (being the directly UE of service of DeNB) of this locality configuration, for example, if grand UE resource requirement surpasses predetermined threshold value, then should suitably reduce the quantity of the MBSFN subframe under the RN.
3) on the other hand, DeNB also can take the lower subframe position of possibility with the MBSFN sub-frame configuration with reference to the interference coordination information of other sub-districts in other sub-districts when the MBSFN subframe of configuration under the RN.
At last, RN notifies UE under it with the MBSFN subframe of DeNB configuration by the form of broadcasting.
Embodiment two: RN reports the MBSFN subframe configuration information of downloading from OAM to DeNB
Embodiment two is applicable to MBSFN subframe initial configuration.
At first, RN is after connecting with DeNB, download MBSFN sub-frame configuration reference information from OAM, these MBSFN sub-frame configuration reference informations are used to indicate this RN to be used for which kind of purposes, as, focus covers, the suburb covers or the like, can also comprise the MBSFN sub-frame number or the access link descending sub frame quantity of RN expectation;
Secondly, RN reports MBSFN sub-frame configuration reference information to DeNB, i.e. MBSFN sub-frame number or the access link descending sub frame quantity of self expecting;
Once more, DeNB is according to RN request and other information, as, grand UE resource requirement, interference coordination require or the like, and when determining that desired value that RN reports is feasible, the desired value that reports according to RN directly disposes the MBSFN subframe RN under, and employing RRC signaling RN;
MBSFN subframe time the adopt algorithm of DeNB under configuration RN is with embodiment one among the embodiment two.
At last, RN notifies UE under it with the MBSFN subframe of DeNB configuration by the form of broadcasting.
Embodiment three: the MBSFN subframe under the PRB occupied information reprovision RN that DeNB reports according to RN.
At first, RN reports the PRB occupied information of access link with trigger-type mode or periodic mode.
In the present embodiment, reporting content can be that the mean P RB that adds up takies quantity, or the mean P RB of statistics takies the ratio of quantity and PRB sum, or take the indication that needs that thresholding obtains increase or reduce the MBSFN subframe, or take the indication that needs that thresholding obtains increase or reduce the access link descending sub frame according to PRB according to PRB.
Secondly, the MBSFN sub-frame configuration reference information that DeNB reports according to RN, in conjunction with the back haul link channel quality, as, grand UE resource requirement, interference coordination demand or the like are determined the MBSFN sub-frame number and the position of access link, and by RRC signaling RN.
In the present embodiment, during PRB occupied information that DeNB reports according to RN, employed algorithm is including but not limited to following content:
1) quantity (being DLbackhaul quantity) of the MBSFN subframe under the calculation of parameter RN that reports according to RN of DeNB is higher than threshold value if the PRB of access link takies quantity, then needs to reduce the quantity of MBSFN subframe, can use subframe to increase access link; Otherwise, can suitably increase the MBSFN sub-frame number.
2) DeNB can also judge that indication increases or reduce the reasonability and the possibility of MBSFN sub-frame number under the RN according to the channel quality of back haul link, for example, if the back haul link channel quality is higher, then can suitably reduce the MBSFN sub-frame number under the RN; Otherwise,, then can suitably increase MBSFN sub-frame number under the RN if the back haul link channel quality is lower.
3) DeNB can also adjust the quantity of the MBSFN subframe under the RN according to the resource requirement of grand UE, and for example, if grand UE resource requirement surpasses predetermined threshold value, then DeNB can not satisfy for the demand that RN increases the MBSFN sub-frame number.
4) DeNB can also take the little subframe position of possibility with the MBSFN sub-frame configuration with reference to the interference coordination information of other sub-districts in other sub-districts.
At last, RN notifies UE under it with the MBSFN subframe of DeNB configuration by the form of broadcasting.
It is the situation of the channel quality information and the RN down buffer storage state of access link that the execution flow process of the foregoing description three is equally applicable to the MBSFN sub-frame configuration reference information that RN reports, and the specifying information content that only reports is difference to some extent, does not repeat them here.
Embodiment four: expectation MBSFN sub-frame number that DeNB reports according to RN or the MBSFN subframe under the access link descending sub frame quantity reprovision RN.
At first, RN reports this MBSFN sub-frame configuration reference information based on the MBSFN sub-frame number or the access link descending sub frame quantity of the expectation of assessment when satisfying trigger condition;
Secondly, the MBSFN sub-frame configuration reference information that DeNB reports according to RN in conjunction with many-sided factors such as grand UE resource requirement, interference coordination demands, is determined the MBSFN sub-frame number and the position of access link, and by RRC signaling RN.
In the present embodiment, when the MBSFN sub-frame number of the expectation that DeNB reports according to RN or the MBSFN subframe under the access link descending sub frame quantity reprovision RN, employed algorithm is including but not limited to following content:
When 1) DeNB receives the MBSFN sub-frame number of the expectation that RN reports or the MBSFN subframe under the access link descending sub frame quantity reprovision RN, MBSFN sub-frame number under the RN that can join according to the resource requirement adjustment of grand UE, as, if grand UE resource requirement surpasses predetermined threshold value, then DeNB can not satisfy for the requirement that RN increases the MBSEN sub-frame number.
2) DeNB takies the little subframe position of possibility with reference to the interference coordination information of other sub-districts with the MBSFN sub-frame configuration in other sub-districts.
At last, RN notifies UE under it with the MBSFN subframe of DeNB configuration by the form of broadcasting.
If MBSFN sub-frame configuration reference information is the MBSFN subframe that is used for DL backhaul of RN expectation and the ratio of access link descending sub frame, then its configuration flow is identical with embodiment four.
Embodiment five: DeNB is used for the MBSFN subframe initial configuration of MBMS business or the MBSFN subframe under the reprovision RN according to RN.
At first, RN reports DeNB in the MBSFN sub-frame configuration of receiving MCE or after disposing the MBSFN subframe according to MBMS transmission needs voluntarily with this MBSFN subframe configuration information;
Secondly, the MBSFN subframe configuration information that is used for the MBMS business that DeNB reports according to RN, whether judgement needs to carry out to be applied under the RN adjustment of the MBSFN subframe of DL backhaul, if desired, then adjust access link MBSFN sub-frame number and the position that is actually used in DL backhaul, and by RRC signaling RN.
In the present embodiment, when MBSFN sub-frame configuration that is used for the MBMS business that DeNB reports according to RN or the MBSFN subframe under the reprovision RN, employed algorithm is including but not limited to following content:
1) DeNB judges the MBSFN sub-frame number under the RN that is used for DL backhaul.
2) in the MBSFN subframe position configuration of DeNB under the RN that is used for DL backhaul, forbid disposing the descending sub frame position that is used for the MBMS business that RN reports.
At last, RN notifies UE it under in conjunction with the MBSFN subframe that is used for the MBMS business by the form of broadcasting with the MBSFN subframe of DeNB configuration.
Embodiment five is equally applicable to the report flow of the special-purpose MBSFN subframe of other special purposes, the configuring condition of these special-purpose MBSFN subframes also need report DeNB by RN, and DeNB will take all factors into consideration it when being actually used in the access link MBSFN sub-frame configuration of DL backhaul.
Embodiment six: RN reports Un interface and Uu interface timing relationship difference
RN is the UE identity for DeNB during initial the access, does not have timing relationship difference with DeNB, and is always synchronous, so present embodiment is applicable to MBSFN subframe reprovision situation.
At first, RN is when there are timing relationship difference in definite Un interface and Uu interface, the timing relationship difference of Un interface and Uu interface is reported RN as MBSFN sub-frame configuration reference information, for example SFN (System Frame Number) is 0 concerning the Un interface, to Uu interface SFN is 1, and then RN reports (the Uu mouth meets SFN)-(Un interface SFN)=1.
Secondly, Un interface and Uu interface timing relationship difference that DeNB reports according to RN are adjusted the MBSFN sub-frame configuration under the RN.
In the present embodiment, Un interface and Uu interface timing relationship difference that DeNB reports according to RN, when adjusting the MBSFN sub-frame configuration under the RN, the algorithm that is adopted is including but not limited to following content:
1) DeNB judges MBSFN sub-frame number under the RN that is used for DL backhaul.
2) under carrying out RN, be used in the MBSFN subframe position configuration of DL backhaul MBSFN subframe position under the RN that Un mouth that reports according to RN and Uu mouth timing relationship difference accurately dispose expectation.
At last, RN notifies UE under it with the MBSFN subframe of DeNB configuration by the form of broadcasting.
In sum, in the embodiment of the invention, by RN with this locality configuration or report to DeNB by the MBSFN configuration reference information that OAM downloads, make DeNB can know the resource requirement situation of the access link of RN according to the MBSFN configuration reference information that receives, thereby MBSFN subframe for its configuration accurate quantity and position, thereby avoid occurring in the system data jamming or the low excessively phenomenon of data volume, it is balanced to make the system data capacity realize, and then has effectively improved the overall data throughput performance of system.
Obviously, those skilled in the art can carry out various changes and modification to the embodiment among the present invention and not break away from the spirit and scope of the present invention.Like this, if these in the embodiment of the invention are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the embodiment among the present invention also is intended to comprise these changes and modification interior.
Claims (21)
1. a method that disposes multimedia broadcast multi-broadcasting business single frequency network MBSFN subframe is characterized in that, comprising:
Donor base station DeNB receives the MBSFN sub-frame configuration reference information that via node RN reports;
DeNB is described RN configuration MBSFN subframe according to the MBSFN sub-frame configuration reference information that receives;
DeNB notifies described RN with configuration result.
2. the method for claim 1 is characterized in that, DeNB is described RN configuration MBSFN subframe according to the MBSFN sub-frame configuration reference information that receives, and comprising:
Described DeNB is the MBSFN sub-frame configuration reference information that receives, and combines with the resource requirement information of the grand mobile terminal UE of this locality configuration and the interference coordination demand information of other sub-districts, is defined as the quantity and the position of the MBSFN subframe of described RN configuration.
3. method as claimed in claim 2, it is characterized in that, described DeNB combines the resource requirement information of the grand mobile terminal UE of this locality configuration and the interference coordination demand information of other sub-districts, is defined as the quantity and the position of the MBSFN subframe of described RN configuration, comprising:
The resources requirement of determining grand UE surpasses when presetting thresholding, does not increase the quantity of MBSFN subframe;
According to the interference coordination demand of other sub-districts, the unappropriated subframe position in other sub-districts is distributed to MBSFN subframe under the RN.
4. as claim 1,2 or 3 described methods, it is characterized in that described MBSFN sub-frame configuration reference information comprises: the MBSFN subframe of the MBSFN sub-frame number of the physical resource occupied information of access link, the channel quality information of access link, RN expectation or access link descending sub frame quantity, RN expectation and the ratio of access link descending sub frame and in the RN down buffer storage state any one or multiple.
5. method as claimed in claim 4 is characterized in that, if comprise physical resource PRB occupied information in the described MBSFN sub-frame configuration reference information, during MBSFN subframe under the then described DeNB configuration RN, comprising:
When determining that according to described PRB occupied information PRB takies quantity and is higher than first thresholding, reduce the quantity of the MBSFN subframe under the RN; Perhaps, when determining that according to described PRB occupied information PRB takies quantity and is lower than second thresholding, improve the quantity of the MBSFN subframe under the RN, wherein, first thresholding is higher than second thresholding.
6. method as claimed in claim 4 is characterized in that, if comprise the channel quality information of access link in the described MBSFN sub-frame configuration reference information, during MBSFN subframe under the then described DeNB configuration RN, comprising:
When determining the access link channel quality, improve the quantity of the MBSFN subframe under the RN greater than the 3rd thresholding, and, when determining the access link channel quality, reduce the quantity of the subframe of the MBSFN under the RN less than the 4th thresholding, wherein, the 3rd thresholding is higher than the 4th thresholding.
7. method as claimed in claim 4, it is characterized in that, if comprise the MBSFN sub-frame number or the access link descending sub frame quantity of RN expectation in the described MBSFN sub-frame configuration reference information, or/and, the MBSFN subframe of RN expectation and the ratio of access link descending sub frame, during MBSFN subframe under the then described DeNB configuration RN, comprising:
In conjunction with the resource requirement information of grand UE and the interference coordination demand information of other sub-districts, when determining that desired value that RN reports is feasible, the desired value that reports according to RN directly disposes the quantity of the MBSFN subframe under the RN.
8. method as claimed in claim 4 is characterized in that, if described MBSFN is if comprise RN down buffer storage state in the described MBSFN sub-frame configuration reference information, during MBSFN subframe under the then described DeNB configuration RN, comprising:
When determining the RN down buffer storage, reduce the quantity of the MBSFN subframe under the RN greater than the 5th thresholding, and before adjustment, if determine that the RN down buffer storage is dropped to less than the 6th thresholding by the 5th thresholding, then cancel the adjustment of MBSFN sub-frame number, wherein, the 5th thresholding is higher than the 6th thresholding.
9. as claim 1,2 or 3 described methods, it is characterized in that, further comprise the timing relationship difference of Un interface and Uu interface in the described MBSFN sub-frame configuration reference information.
10. as claim 1,2 or 3 described methods, it is characterized in that, further comprise special-purpose MBSFN subframe indication information in the described MBSFN sub-frame configuration reference information.
11. method as claimed in claim 10 is characterized in that, described MBSFN comprises during according to the MBSFN subframe under the described special-purpose MBSFN subframe indication information configuration RN:
The unappropriated subframe position of described special-purpose MBSFN subframe is distributed to MBSFN subframe under the RN.
12. a method that disposes multimedia broadcast multi-broadcasting business single frequency network MBSFN subframe is characterized in that, comprising:
Via node RN obtains the MBSFN sub-frame configuration reference information at this RN;
Described RN mails to donor base station DeNB with the MBSFN sub-frame configuration reference information that obtains, and indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN configuration MBSFN subframe;
Receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to this configuration result.
13. method as claimed in claim 12, it is characterized in that the MSBSFN sub-frame configuration reference information that described RN reports comprises: the MBSFN subframe of the MBSFN sub-frame number of the physical resource occupied information of access link, the channel quality information of access link, RN expectation or access link descending sub frame quantity, RN expectation and the ratio of access link descending sub frame and in the RN down buffer storage state any one or multiple.
14. method as claimed in claim 13 is characterized in that, if subframe is asynchronous between intrasystem Un interface and the Uu interface, also comprises the timing relationship difference of Un interface and Uu interface in the MSBSFN sub-frame configuration reference information that then described RN reports.
15. method as claimed in claim 13 is characterized in that, if Installed System Memory in special-purpose MBSFN subframe, also comprises described special-purpose MBSFN subframe in the MSBSFN sub-frame configuration reference information that then described RN reports.
16., it is characterized in that described RN obtains described MBSFN sub-frame configuration reference information and comprises: obtain described MBSFN sub-frame configuration reference information from local configuration information as each described method of claim 12-15; Perhaps, described Operation and Maintenance entity OAM downloads described MBSFN sub-frame configuration reference information.
17., it is characterized in that described RN reports described MBSFN configuration reference information according to pre-conditioned triggering, perhaps, periodically reports described MBSFN configuration information as each described method of claim 12-15.
18., it is characterized in that described RN inserts MAC layer control signaling by medium or the radio resource control RRC signaling reports described MBSFN sub-frame configuration reference information as each described method of claim 12-15.
19. a donor base station DeNB is characterized in that, comprising:
Communication unit is used to receive the multimedia broadcast multi-broadcasting business single frequency network MBSFN sub-frame configuration reference information that via node RN reports;
Dispensing unit is used for according to the described MBSFN sub-frame configuration reference information that receives, and is described RN configuration MBSFN subframe;
Notification unit is used for notifying described RN with configuration result.
20. a via node is characterized in that, comprising:
Acquiring unit is used for via node RN and obtains multimedia broadcast multi-broadcasting business single frequency network MBSFN sub-frame configuration reference information at this RN;
Transmitting element, the MBSFN sub-frame configuration reference information that is used for obtaining mails to donor base station DeNB, indicates this DeNB according to the MBSFN sub-frame configuration reference information that receives, and is this RN MBSFN subframe;
Receiving element is used to receive the configuration result that DeNB returns;
Dispensing unit is used for according to described configuration result MBSFN subframe under this RN being set.
21. a communication system is characterized in that, comprises some donor base station DeNB and via node RN, wherein,
DeNB is used to receive the multimedia broadcast multi-broadcasting business single frequency network MBSFN sub-frame configuration reference information that RN reports, and according to described MBSFN sub-frame configuration reference information, is described RN configuration MBSFN subframe, and notifies described RN with configuration result;
RN, be used to obtain multimedia broadcast multi-broadcasting business single frequency network MBSFN sub-frame configuration reference information at this RN, and the MBSFN sub-frame configuration reference information that obtains mail to donor base station DeNB, indicate this DeNB according to the MBSFN sub-frame configuration reference information that receives, be this RN configuration MBSFN subframe, and receive the configuration result that DeNB returns, and MBSFN subframe under this RN is set according to described configuration result.
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