CN103188004A - Method and device for executing uplink feedback based on enhanced multimedia broadcast multicast service (eMBMS) system - Google Patents
Method and device for executing uplink feedback based on enhanced multimedia broadcast multicast service (eMBMS) system Download PDFInfo
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Abstract
The invention aims to provide a method and a device for executing uplink feedback based on an enhanced multimedia broadcast multicast service (eMBMS) system. The method for executing uplink feedback based on the eMBMS system comprises: eMBMS timing operation is started to obtain a current eMBMS report time which is used for judging whether a current time is due or not; corresponding feedback statistical information is accumulated each time an eMBMS downlink subframe from a base station is received; quality information related to a current channel is obtained each time an eMBMS downlink subframe from a base station is received; when a timing device judges the time to be due, a random access channel (RACH) request is launched; and when a random access response is obtained in a random access time window, a radio resource control (RRC) connecting request is sent. According to the technical scheme, channel quality indicator (CQI) information and information related to acknowledgement (ACK) and negative acknowledgement (NACK) of a user device are sent to the base station by utilizing the needed feedback information accessed from an RACH, the base station or a multi-role customer edge (MCE) is carried out pointed adjustment according to the information fed back by the user device, and the current eMBMS system is made to achieve the optimum integral performance.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of uplink feedback method and apparatus based on the eMBMS system.
Background technology
At existing eMBMS (enhanced Multimedia Broadcast Multicast Control, the enhanced multimedia broadcast multicast services) in the system, by MCE (Multi Customer Edge, the multiple-user network edge device) be responsible for the positioning time/the frequency wireless electric resources, and the operation of the further details of definite radio configuration, for example, modulation pattern etc.But because in the existing eMBMS system, subscriber equipment can not provide feedback informations such as CQI, ACK/NACK, thus MCE when determining configuration without any foundation.
Summary of the invention
The purpose of this invention is to provide a kind of for method and the device of carrying out uplink feedback based on the eMBMS system.
According to an aspect of the present invention, provide a kind of for the feedback device of carrying out uplink feedback based on the eMBMS system, described feedback device comprises:
Time set be used for to start eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether;
Statistic device is used for every reception from an eMBMS downlink subframe of base station, namely adds up corresponding feedback statistical information;
Quality acquisition is used for every reception from an eMBMS downlink subframe of base station, namely obtains current channel quality relevant information;
The request apparatus for initiating is used for when the time set judgement time expires, and initiates the RACH request;
Dispensing device is used for when obtaining accidental access response in window turn-on time at random, transmission RRC connection request, and wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
According to another aspect of the present invention, also provide a kind of method that is used for carrying out based on the eMBMS system uplink feedback that in user's set, realizes, said method comprising the steps of:
A starts eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether;
The every reception of b namely adds up corresponding feedback statistical information from an eMBMS downlink subframe of base station;
The every reception of c is namely obtained current channel quality relevant information from an eMBMS downlink subframe of base station;
When d expires when the time set judgement time, initiate the RACH request;
E sends the RRC connection request when obtaining accidental access response in window turn-on time at random, wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
Compared with prior art, the present invention has the following advantages: according to the solution of the present invention, send the CQI information of user's set and the relevant information of ACK and NACK to the base station by the required feedback information that utilizes RACH to insert, thereby make base station or MCE to adjust targetedly according to user's set institute feedack, so that the overall performance of current eMBMS system reaches optimum.
Description of drawings
By reading the detailed description of doing with reference to the following drawings that non-limiting example is done, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is according to of the present invention a kind of for the structural representation of carrying out the feedback device of uplink feedback based on the eMBMS system;
Fig. 2 is a kind of method flow diagram of realizing that is used for carrying out based on the eMBMS system uplink feedback according to the present invention in user's set.
Same or analogous Reference numeral represents same or analogous parts in the accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Fig. 1 has illustrated according to of the present invention a kind of for the structural representation of carrying out the feedback device of uplink feedback based on the eMBMS system.Wherein, described feedback device is contained in the user's set of wireless communication system.Described wireless communication system includes but not limited to be the wireless communication system based on 3GPP LTE.Described wireless communication system comprises base station and user's set.Wherein, described base station includes but not limited to BS, e-NodeB, Home eNodeB, macro base station etc.Described user's set comprises and can with wireless mode directly or indirectly and the electronic installation of base station communication include but not limited to mobile phone, PDA etc.Need to prove, it should be appreciated by those skilled in the art that described wireless communication system, base station and user's set are not to be limited with described.
Feedback device according to the present invention comprises time set 1, statistic device 2, quality acquisition 3, request apparatus for initiating 4 and dispensing device 5.
Time set 1 starts eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether.
Then, when user's set received eMBMS downlink subframe from the base station, statistic device 2 namely added up corresponding feedback statistical information.Wherein, described feedback statistical information obtains according to ACK statistical value and NACK statistical value.Preferably, described feedback statistical information comprises ACK statistical value and/or the shared ratio of NACK statistical value.Wherein, described statistic device also comprises the first sub-statistic device (not shown), the second sub-statistic device (not shown) and statistics proportioning device (not shown).
Wherein, when user's set judged that the data check of the eMBMS downlink subframe received is correct, the first sub-statistic device added up 1 with described ACK statistical value.
When the data check of judging the eMBMS downlink subframe that has received was incorrect, the second sub-statistic device added up 1 with described NACK statistical value.
Then, the statistics proportioning device obtains ACK statistical value and/or the shared ratio of NACK statistical value according to acquired ACK statistical value and NACK statistical value.
For example, acquired ACK statistical value is that 3, NACK statistical value is 2, and then adding up proportioning device, to obtain the shared ratio of current ACK statistical value be 60%.
Need to prove, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to acquired ACK statistical value and NACK statistical value, obtain the implementation of the shared ratio of ACK statistical value and/or NACK statistical value, all should be within the scope of the present invention.
And whenever the eMBMS downlink subframe of user's set reception from the base station, quality acquisition 3 is namely obtained current channel quality relevant information, and preferably, described channel quality relevant information comprises SINR.
Wherein, when described channel quality relevant information comprised SINR, the first sub-deriving means (not shown) that described quality acquisition 3 is passed through to comprise and evaluation deriving means (not shown) were obtained current CQI information.
Wherein, when user's set received eMBMS downlink subframe from the base station, the first sub-deriving means namely obtained the value of current SINR (Signal to Interference and Noise Ratio, Signal to Interference plus Noise Ratio).
Then, estimate the mean value that deriving means obtains acquired each SINR, to determine CQI (Channel Quality Indicator, CQI) information based on described mean value.
Particularly, described evaluation deriving means directly with the mean value of each SINR as CQI information, perhaps, described evaluation deriving means obtains the CQI information corresponding with the current SINR mean value that obtains of pre-stored according to predetermined SINR mean value and the corresponding relation of CQI information.
For example, estimate deriving means and adopt following formula, come to upgrade according to each short-term SINR that obtains the SINR long-term average of local storage, to obtain new SINR long-term average: SINR
For a long time(n)=β SINR
For a long time(n-1)+(1-β) SINR
Short-termThen, directly with the long-term average that obtains as current CQI information.
Wherein, those skilled in the art should determine the mode of the mean value of acquisition SINR according to actual conditions and demand, and according to the mode that the SINR that obtains determines CQI information, do not repeat them here.
Need to prove, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any mean value that obtains acquired each SINR, to determine the implementation of CQI information based on described mean value, all should be within the scope of the present invention.
Preferably, described evaluation deriving means also can be according to the mean value of each SINR, and in conjunction with other relevant parameters, and for example signal and noise distortion obtain corresponding CQI information than (SNDR) etc.
Then, when the time set judgement time expired, request apparatus for initiating 4 was initiated the RACH request.
Particularly, when the time set judgement time expired, request apparatus for initiating 4 sent the prefix information that is used for initiating the RACH request to the base station.
Then, when user's set obtained accidental access response in window turn-on time at random, dispensing device 5 sent RRC (Radio Resource Control, Radio Resource control) connection request.Wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
Then, base station or MCE adjust relevant connection according to the received described CQI information in base station and the relevant information of ACK or NACK.But as base station adjuster transmission energy, MCE can adjust current encoding rate etc.
Then, the base station that receives described RRC connection request discharges all RACH resources, reports the relevant information of described CQI information and ACK or NACK by RACH for other subscriber equipmenies in the eMBMS system.
As one of the preferred embodiments of the present invention, described feedback device also comprises the reset apparatus (not shown).
Reset apparatus is restarted the described time set of described startup and is picked up counting, and the described feedback statistical information of resetting.
Particularly, described reset apparatus restarts described time set and picks up counting, obtaining current eMBMS report information, and, described reset apparatus all is set to 0 with ACK statistical value and NACK statistical value, to regain ACK statistical value and and the NACK statistical value in the present timing process.
As another preferred embodiment of the present invention, described feedback device also comprises the first timing adjusting device (not shown) and the second timing adjusting device (not shown).
Wherein, when failing to obtain accidental access response in window turn-on time at random, and current eMBMS report time is during less than predetermined maximum eMBMS report time, and the first timing adjusting device will described current eMBMS report time increase scheduled time increment; Perhaps, when failing to obtain accidental access response in window turn-on time at random, and described current eMBMS report time is during more than or equal to described predetermined maximum eMBMS report time, and the second timing adjusting device arranges predetermined maximum eMBMS report time with described current eMBMS report time.
According to the solution of the present invention, send the CQI information of user's set and the relevant information of ACK and NACK to the base station by the required feedback information that utilizes RACH to insert, thereby make base station or MCE to adjust targetedly according to user's set institute feedack, so that the overall performance of current eMBMS system reaches optimum.
Fig. 2 has illustrated according to a kind of method flow diagram of realizing in user's set that is used for carrying out based on the eMBMS system uplink feedback of the present invention.The method according to this invention comprises step S1, step S2, step S3, step S4 and step S5.
In step S1, user's set starts eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether.
Then, in step S2, when user's set receives eMBMS downlink subframe from the base station, namely add up corresponding feedback statistical information.Wherein, described feedback statistical information obtains according to ACK statistical value and NACK statistical value.Preferably, described feedback statistical information comprises ACK statistical value and/or the shared ratio of NACK statistical value.
Wherein, described step S2 further comprises step S21 (not shown), step S22 (not shown) and step S23 (not shown).
Wherein, in step S21, when the data check of judging the eMBMS downlink subframe that has received was correct, user's set added up 1 with described ACK statistical value.
In step S22, when the data check of judging the eMBMS downlink subframe that has received was incorrect, user's set added up 1 with described NACK statistical value.
Then, in step S23, user's set obtains ACK statistical value and/or the shared ratio of NACK statistical value according to acquired ACK statistical value and NACK statistical value.
For example, acquired ACK statistical value is that 3, NACK statistical value is 2, and then to obtain the shared ratio of current ACK statistical value be 60% to user's set.
Need to prove, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any according to acquired ACK statistical value and NACK statistical value, obtain the implementation of the shared ratio of ACK statistical value and/or NACK statistical value, all should be within the scope of the present invention.
Then, in step S3 China, whenever an eMBMS downlink subframe that receives from the base station, user's set namely obtains current current channel quality relevant information, and preferably, described channel quality relevant information comprises SINR.
Wherein, when described channel quality relevant information comprised SINR, described step S3 further comprised step S31 (not shown) and step S32 (not shown).
In step S31, when eMBMS downlink subframe receiving from the base station, user's set namely obtains the value of current SINR (Signal to Interference and Noise Ratio, Signal to Interference plus Noise Ratio).
Then, in step S32, user's set obtains the mean value of acquired each SINR, to determine CQI information based on described mean value.
Particularly, described user's set directly with the mean value of each SINR as CQI information, perhaps, described user's set obtains the CQI information corresponding with the current SINR mean value that obtains of pre-stored according to predetermined SINR mean value and the corresponding relation of CQI information.
Particularly, described user's set directly with the mean value of each SINR as CQI information, perhaps, described user's set obtains the CQI information corresponding with the current SINR mean value that obtains of pre-stored according to predetermined SINR mean value and the corresponding relation of CQI information.
For example, user's set adopts following formula, comes to upgrade according to each short-term SINR that obtains the SINR long-term average of local storage, to obtain new SINR long-term average: SINR
For a long time(n)=β SINR
For a long time(n-1)+(1-β) SINR
Short-termThen, user's set directly with the long-term average that obtains as current CQI information.
Wherein, those skilled in the art should determine the mode of the mean value of acquisition SINR according to actual conditions and demand, and according to the mode that the SINR that obtains determines CQI information, do not repeat them here.
Need to prove, above-mentioned for example only for technical scheme of the present invention is described better, but not limitation of the present invention, those skilled in the art should understand that, any mean value that obtains acquired each SINR, to determine the implementation of CQI information based on described mean value, all should be within the scope of the present invention.
Need to prove that described step S2 and step S3 do not have precedence relationship, user's set can first execution in step S2 execution in step S3 again, perhaps first execution in step S3 execution in step S2 again, perhaps execution in step S2 and step S3 simultaneously.
Preferably, described evaluation deriving means also can be according to the mean value of each SINR, and in conjunction with other relevant parameters, and for example signal and noise distortion obtain corresponding CQI information than (SNDR, Signal To Noise And Distortion Ratio) etc.
Then, in step S4, when judgement time expired, user's set was initiated RACH (Random Access Channel, Random Access Channel) request.
Particularly, when judgement time expired, user's set sent the prefix information that is used for initiating the RACH request to the base station.
Then, when user's set obtains accidental access response in window turn-on time at random, send RRC (Radio Resource Control, Radio Resource control) connection request.Wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
Then, the base station that receives described RRC connection request discharges all RACH resources, reports the relevant information of described CQI information and ACK or NACK by RACH for other subscriber equipmenies in the eMBMS system.
As one of the preferred embodiments of the present invention, described method also comprises step S6 (not shown).
In step S6, user's set restarts timing, and reset described ACK statistical value and NACK statistical value.
Particularly, described user's set restarts described time set and picks up counting, obtaining current eMBMS report information, and, described user's set all is set to 0 with ACK statistical value and NACK statistical value, to regain ACK statistical value and and the NACK statistical value in the present timing process.
As another preferred embodiment of the present invention, described method also comprises step S7 (not shown) and step S8 (not shown).
Wherein, in step S7, when failing to obtain accidental access response in window turn-on time at random, and current eMBMS report time is during less than predetermined maximum eMBMS report time, and described user's set will described current eMBMS report time increase scheduled time increment.
In step S8, when failing to obtain accidental access response in window turn-on time at random, and described current eMBMS report time is during more than or equal to described predetermined maximum eMBMS report time, and the described current eMBMS report time of described user's set is set to predetermined maximum eMBMS report time.
The method according to this invention, send the CQI information of user's set and the relevant information of ACK and NACK to the base station by the required feedback information that utilizes RACH to insert, thereby make base station or MCE to adjust targetedly according to user's set institute feedack, so that the overall performance of current eMBMS system reaches optimum.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and under the situation that does not deviate from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, therefore is intended to be included in the present invention dropping on the implication that is equal to important document of claim and all changes in the scope.Any Reference numeral in the claim should be considered as limit related claim.In addition, obviously other unit or step do not got rid of in " comprising " word, and odd number is not got rid of plural number.A plurality of unit of stating in system's claim or device also can be realized by software or hardware by a unit or device.The first, the second word such as grade is used for representing title, and does not represent any specific order.
Claims (10)
1. feedback device that is used for carrying out based on the eMBMS system uplink feedback, described feedback device comprises:
Time set be used for to start eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether;
Statistic device is used for every reception from an eMBMS downlink subframe of base station, namely adds up corresponding feedback statistical information, and wherein, described feedback statistical information obtains according to ACK statistical value and NACK statistical value;
Quality acquisition is used for every reception from an eMBMS downlink subframe of base station, namely obtains current channel quality relevant information;
The request apparatus for initiating is used for when the time set judgement time expires, and initiates the RACH request;
Dispensing device, be used for when acquisition accidental access response in window turn-on time at random, send the RRC connection request to the base station, wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
2. feedback device according to claim 1, wherein, described feedback statistical information comprises ACK statistical value and/or the shared ratio of NACK statistical value, wherein, described statistic device also comprises:
The first sub-statistic device is used for when the data check of judging the eMBMS downlink subframe that has received is correct, and the ACK statistical value adds up 1;
The second sub-statistic device is used for when the data check of judging the eMBMS downlink subframe that has received is incorrect, and the NACK statistical value adds up 1;
The statistics proportioning device is used for according to described ACK statistical value and described NACK statistical value, obtains ACK statistical value and/or the shared ratio of NACK statistical value.
3. feedback device according to claim 1 and 2, wherein, when described channel quality relevant information comprised SINR, described quality acquisition also comprised:
The first sub-deriving means is used for every reception from an eMBMS downlink subframe of base station, namely obtains current SINR;
Estimate deriving means, be used for obtaining the mean value of acquired each SINR, to determine CQI information based on described mean value.
4. according to each described feedback device in the claim 1 to 3, wherein, described feedback device also comprises:
The first timing adjusting device is used for when failing obtaining accidental access response in window turn-on time at random, and current eMBMS report time is during less than predetermined maximum eMBMS report time, will described current eMBMS report time increase scheduled time increment;
The second timing adjusting device, be used for when failing obtaining accidental access response in window turn-on time at random, and described current eMBMS report time arranges predetermined maximum eMBMS report time with described current eMBMS report time during more than or equal to described predetermined maximum eMBMS report time.
5. according to each described feedback device in the claim 1 to 4, wherein, described feedback device also comprises:
Reset apparatus is used for restarting described time set and picks up counting, and reset described ACK statistical value and NACK statistical value.
One kind in user's set, realize be used for method based on the uplink feedback of eMBMS system, said method comprising the steps of:
A starts eMBMS timing operation, to obtain to be used for judging current time overdue current eMBMS report time whether;
The every reception of b namely adds up corresponding feedback statistical information from an eMBMS downlink subframe of base station, and wherein, described feedback statistical information obtains according to ACK statistical value and NACK statistical value;
The every reception of c is namely obtained current channel quality relevant information from an eMBMS downlink subframe of base station;
When d expires when the time set judgement time, initiate the RACH request;
E sends the RRC connection request when obtaining accidental access response in window turn-on time at random, wherein, described RRC connection request comprises described feedback statistical information and the CQI information that obtains based on described channel quality relevant information.
7. method according to claim 6, wherein, described feedback statistical information comprises ACK statistical value and/or the shared ratio of NACK statistical value, wherein, described step b also comprises:
-when the data check of judging the eMBMS downlink subframe that has received was correct, the ACK statistical value added up 1;
-when the data check of judging the eMBMS downlink subframe that has received was incorrect, the NACK statistical value added up 1;
-according to described ACK statistical value and described NACK statistical value, obtain ACK statistical value and/or the shared ratio of NACK statistical value.
8. according to claim 6 or 7 described methods, wherein, when described channel quality relevant information comprised SINR, described step c also comprised:
-every reception is namely obtained current SINR from an eMBMS downlink subframe of base station;
-obtain the mean value of acquired each SINR, to determine CQI information based on described mean value.
9. according to each described method in the claim 6 to 8, wherein, described method is further comprising the steps of:
-when failing to obtain accidental access response in window turn-on time at random, and current eMBMS report time is during less than predetermined maximum eMBMS report time, and will described current eMBMS report time increase scheduled time increment;
-when failing to obtain accidental access response in window turn-on time at random, and described current eMBMS report time arranges predetermined maximum eMBMS report time with described current eMBMS report time during more than or equal to described predetermined maximum eMBMS report time.
10. according to each described method in the claim 6 to 9, wherein, described method is further comprising the steps of:
-restart timing, and reset described ACK statistical value and NACK statistical value.
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