Embodiment
Embodiment of the invention RN equipment is determined the flow scheduling parameter according to the down buffer storage data volume, and to base station transmitted traffic scheduling parameter, the data volume of descending back haul link is adjusted according to the flow scheduling parameter in the base station.Because DeNB can control the downlink data amount in the LTE-A system, avoid because DeNB is difficult to the downlink data amount is controlled the downlink data downlink data congested or R-UE of the RN equipment of appearance postpones, thereby reduced the delay of downlink data.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 2, the system of embodiment of the invention adjustment data volume comprises: RN equipment 10 and base station 2 ().
RN equipment 10 is used for determining the flow scheduling parameter according to the down buffer storage data volume, and to the base station 20 transmitted traffic scheduling parameter.
Base station 20 is used for adjusting the data volume of descending back haul link according to the flow scheduling parameter from RN equipment 10 of receiving.
Wherein, RN equipment 10 is according to the down buffer storage data volume, and the mode of determining the flow scheduling parameter has a variety of, and the below enumerates several.
Mode one, report the down buffer storage state of all residential quarters under the RN equipment.
The down buffer storage data volume that RN equipment 10 is corresponding according to logic channel is determined the flow scheduling parameter.
Wherein, the down buffer storage data volume corresponding according to logic channel, the mode of determining the flow scheduling parameter has again a variety of, and the below enumerates several.
Mode A1, RN equipment 10 are determined down buffer storage data volume sum corresponding to self all logic channel, and according to down buffer storage data volume sum, are determined the flow scheduling parameter.
Can be with the value of the down buffer storage data volume sum value as the flow scheduling parameter such as: RN equipment 10; RN equipment 10 can also according to the corresponding relation of predefined number range and call number, be determined the affiliated call number corresponding to number range of value of down buffer storage data volume sum, then with the value of call number as the flow scheduling parameter.
Need to prove, the embodiment of the invention is not limited to above-mentioned dual mode, and other can be according to down buffer storage data volume sum, and the mode of determining the flow scheduling parameter all is to use the embodiment of the invention.
Mode A2, RN equipment 10 are determined the logic channel in each logic channel group according to the logic channel group of dividing in advance;
When only having a logic channel in the logic channel group that corresponding down buffer storage data are arranged, determine the down buffer storage data volume that this logic channel group is corresponding;
The down buffer storage data volume corresponding according to this logic channel group determined the flow scheduling parameter.
Such as: the value of the down buffer storage data volume that RN equipment 10 can be corresponding with this logic channel group is as the value of flow scheduling parameter; RN equipment 10 can also according to the corresponding relation of predefined number range and call number, be determined the affiliated call number corresponding to number range of value of the down buffer storage data volume that this logic channel group is corresponding, then with the value of call number as the flow scheduling parameter.
Need to prove, the embodiment of the invention is not limited to above-mentioned dual mode, and other can be according to down buffer storage data volume sum, and the mode of determining the flow scheduling parameter all is to use the embodiment of the invention.
Mode A3, RN equipment 10 are determined the logic channel in each logic channel group according to the logic channel group of dividing in advance;
When the logic channel in a plurality of logic channel groups are arranged has corresponding down buffer storage data, determine the down buffer storage data volume that all logic channel groups are corresponding;
The down buffer storage data volume corresponding according to each logic channel group determined the flow scheduling parameter that each logic channel group is corresponding respectively.
Concrete, RN equipment 10 is determined after down buffer storage data volume corresponding to each logic channel group (if some logic channel groups do not have the down buffer storage data volume, then the down buffer storage data volume that this logic channel group is corresponding is as 0), according to the down buffer storage data volume, determine the flow scheduling parameter that each logic channel group is corresponding.That is to say have what logic channel groups will determine what flow scheduling parameters.
The mode of determining the flow scheduling parameter that flow scheduling parameter corresponding to each logic channel group is corresponding with a definite logic channel group among the mode A2 among the mode A3 is similar, does not repeat them here.
Wherein, the logic channel group among mode A2 and the A3 can be divided rear notice RN equipment 10 by base station 20, also can be by being stored in respectively in RN equipment 10 and the base station 20 after the agreement regulation.The logicality of dividing can be adjusted as required to group.Because mode A2 and A3 do not need distinguishing cell, so in the logic channel group for mode A2 and A3, the logic channel of same logic channel group can belong to same residential quarter also can belong to different districts.
For mode one, RN equipment 10 during 20 transmitted traffic scheduling parameter, can place data cell to the base station with the flow scheduling parameter.
Here can introduce a new MAC CE (MAC Control Element, media access control layer control unit) and be used for the bearing downlink buffer status, for convenience of description hereinafter to be referred as DL buffer MAC CE.Then data cell can be MAC CE.
Need to prove, the embodiment of the invention is not limited to MAC CE, all is to use the embodiment of the invention as long as the flow scheduling parameter can be sent to the data cell of base station.
Concrete, RN equipment 10 usefulness MAC CE bearer traffic scheduling parameter, and logical channel number placed MAC corresponding to this MAC CE head, wherein to be used to indicate loading section corresponding to MAC head be the MAC CE (being DL buffer MACCE) that carries the flow scheduling parameter of RN equipment to logical channel number;
RN equipment 10 20 sends the MAC PDU (MAC Packet Data Unit, descending media access control protocol data unit) comprise this MAC CE and corresponding MAC to the base station.
No matter be mode A1, A2 and A3, the form of the corresponding MAC head of DL buffer MAC CE all is the same, referring to Fig. 5 A.
Among Fig. 5 A, LCID (Logical ChannelID, Logic Channel Identifier): be used for the logical channel number of the corresponding load part of sign, long BSR (long reporting cached state), short BSR (short reporting cached state), truncated BSR (reporting cached state that does not have the top) respectively have a LCID.
E: extended bit, being used to indicate next byte is MAC head or MAC load.
R: reserved bit.
In specific implementation process, the DL buffer MAC CE of mode A1, A2 and A3 can be different.
The DL buffer MAC CE of mode A1 because mode A1 does not distinguish logic channel corresponding to down buffer storage data, only carries out total amount and reports shown in Fig. 5 B, so also do not need in the DL buffer MAC CE form to divide.
Be 8 bits such as the capacity among Fig. 5 B, the bit number that takies when total buffer memory can also be introduced reserved bit during less than 8 bit in DL buffer MAC CE.
The DL buffer MAC CE of mode A2 is shown in Fig. 5 C, owing to only having a logic channel group that the down buffer storage data volume is arranged, so only need to report this logic channel group to get final product, which logic channel group in order to allow base station 20 know, RN equipment 10 can be according to the corresponding relation of predefined logic channel group and logic channel group sign, determine the logic channel group sign that this logic channel group is corresponding, after the logic channel group sign and the binding of down buffer storage data volume determined, place the MAC CE of bearer traffic scheduling parameter.
Suppose to have 4 logic channel groups, every group of down buffer storage reports and only needs 6bit, when only having a logic channel group that downlink data is arranged, logic channel group sign can be placed front, the back amount of releasing scheduling parameter.
Wherein, notice RN equipment 10 after the corresponding relation of logic channel group and logic channel group sign can be set up by base station 20 also can be by being stored in respectively in RN equipment 10 and the base station 20 after the agreement regulation.
Need to prove, the embodiment of the invention is not limited to the form of Fig. 5 C, and other DL buffer MAC CE forms that logic channel group sign and flow scheduling parameter can be sent to base station 20 all are suitable for the embodiment of the invention.
The DL buffer MAC CE of mode A3 is shown in Fig. 5 D, owing to there being a plurality of logic channel groups that the down buffer storage data volume is arranged, so each flow scheduling parameter can be placed in order the MAC CE of bearer traffic scheduling parameter.
Have 4 logic channel groups such as one, according to the order of logic channel group sign, (namely 0,1,2,3) flow scheduling parameter that the logic channel group is corresponding places DL buffer MAC CE from small to large.
For mode one, RN equipment 10 can determine satisfy the first trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine the flow scheduling parameter.
The flow scheduling parameter that can carry here is according to different modes, and the surplus resources capacity that needs is not identical yet, such as mode A1 the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 B need to be arranged; Mode A2 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 C; Mode A3 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 D.
Wherein, determine to satisfy the first trigger condition during a kind of in satisfying following condition of RN equipment 10:
The first triggering cycle arrived (being periodic triggers), and concrete can arrange DL buffer timer, and DLbuffer reports rear startup or restarts, and triggered reporting behind this timer expiry;
Greater than the first threshold value (being Event triggered), the down buffer storage data volume here also can replace to access link downlink resource utilance to down buffer storage data volume (being the value of back haul link data volume-access link data volume);
Less than the second threshold value (being Event triggered), the down buffer storage data volume here also can replace to access link downlink resource utilance to down buffer storage data volume (being the value of back haul link data volume-access link data volume).
The first threshold value and the second threshold value can arrange as required, such as can rear notice RN equipment 10 being set by base station 20, also can be arranged by RN equipment 10, can also manually be provided with and store in the RN equipment 10.
After in specific implementation process, might occurring determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment RN equipment 10 can be according to the time sequencing that satisfies the first trigger condition, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter.
Then trigger such as timer before this, after be that the down buffer storage data volume triggers greater than the first threshold value, and after the down buffer storage data volume triggers greater than the first threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, down buffer storage data volume when at this moment triggering greater than the first threshold value according to the down buffer storage data volume is determined the flow scheduling parameter.
Because the down buffer storage data volume triggers greater than the first threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment determined the flow scheduling parameter, and timer then triggers and is also keeping, so need the deletion timer to trigger, then RN equipment 10 is after the 20 transmitted traffic scheduling parameter of base station, and deletion the last time is satisfied all triggerings of determining before the first trigger condition.
For mode one, RN equipment 10 can also determine to have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine flow scheduling parameter (being that padding triggers).
The flow scheduling parameter that can carry during Padding triggers is according to different modes, the surplus resources capacity that needs is not identical yet, concrete back haul link uplink have surplus resources can with and can hold DLbuffer MAC CE and MAC the time, can determine to have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources.
In specific implementation process, the priority of Event triggered and periodic triggers can be higher than the priority that padding triggers.
Mode two, report the down buffer storage state of 10 times each residential quarters of RN equipment.
Wherein, the upstream data whether mode two can be distinguished from the different districts of RN equipment 10 according to base station 20 again is divided into dual mode.
The upstream data from the different districts of RN equipment 10 can be distinguished in mode B1, base station 20.
Mode B1 and mode one are similar, also are the down buffer storage data volumes corresponding according to logic channel, determine the flow scheduling parameter.
Difference is: if when adopting mode A1 in the similar fashion one, what RN equipment 10 was determined is not down buffer storage data volume sums corresponding to self all logic channel just, but determines down buffer storage data volume sum corresponding to all logic channels under the same residential quarter.
If adopt mode A2 or A3 (namely dividing the logic channel group) in the similar fashion one, then when dividing the logic channel group, all logic channels in the same logic channel group belong to same residential quarter, and other process and mode one are similar, do not repeat them here.
The upstream data from the different districts of RN equipment 10 can not be distinguished in mode B2, base station 20.
Wherein, RN equipment 10 is determined cell ID corresponding to each logic channel group; The cell ID that each logic channel group is corresponding places the MAC CE of MAC corresponding to the MAC CE of bearer traffic scheduling parameter head or bearer traffic scheduling parameter or as the MAC PDU head of MAC independently.
Concrete, because the upstream data from the different districts of RN equipment 10 can not be distinguished in base station 20, so cell ID need to be placed MAC PDU.
If adopt the mode A1 in the similar fashion one, then can in the DL of Fig. 5 B buffer MAC CE, add cell ID, and what RN equipment 10 was determined is not down buffer storage data volume sums corresponding to self all logic channel, but determines down buffer storage data volume sum corresponding to all logic channels under the same residential quarter.
If adopt mode A2 or A3 (namely dividing the logic channel group) in the similar fashion one, then can in the DL buffer of Fig. 5 C and Fig. 5 D MAC CE, add cell ID, and when dividing the logic channel group, all logic channels in the same logic channel group belong to same residential quarter.
Except the mode of interpolation cell ID above-mentioned, also have some general modes, namely no matter concrete which kind of mode in the employing mode one all is suitable for.
Shown in Fig. 5 E, can introduce total MAC head, the some height heads under this child head and corresponding MAC load belong to same residential quarter.
Shown in Fig. 5 F, in DL buffer MAC, add indication territory, residential quarter, MAC form of DL buffer is as follows, and wherein the length in cell ID (cell ID) territory represents that by the final cell ID that determines mode is definite.
The triggering mode of the triggering mode of mode two and mode one is similar, does not repeat them here.
For mode two, if after determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment RN equipment 10 can be according to the time sequencing that satisfies the first trigger condition, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter.
For mode two, RN equipment 10 can be deleted the last all triggerings determined before the first trigger condition of satisfying after the 20 transmitted traffic scheduling parameter of base station.
Mode three, represent the state of current back haul link downlink transmission data amount with 1~2 bit.
RN equipment 10 is according to the down buffer storage data volume, determines corresponding link information bit value, and according to the link information bit value, determines the value of flow scheduling parameter, and wherein the link information bit value is used to indicate the state of down buffer storage data volume.
Mode three and mode one and two differences are that RN equipment 10 with the value of link information bit value as the flow scheduling parameter, compares the amount of bits that mode one and mode two can reduce transmission like this.
Suppose link information bit stealing 1 bit, then whether different bits represents the current downlink data amount of receiving from back haul link and mates from the data volume that access link sends to user terminal.
For example:
0 expression coupling, 1 expression (back haul link data volume-access link data volume)>first threshold value;
Accordingly, existing back haul link data volume is kept in base station 20 after receiving 0, receive 1 rear minimizing back haul link downlink data amount.
For example:
0 expression (back haul link data volume-access link data volume)<second thresholding, 1 expression (back haul link data volume-access link data volume)>first thresholding;
1 rear minimizing back haul link downlink data amount is received receiving that 0 suitably increases back haul link downlink data amount afterwards according to data status to be sent in base station 20.
Suppose link information bit stealing 1 bit, then can represent 4 states, wherein 3 bit representation back haul link data volumes are greater than the access link data volume in utilization, and the back haul link data volume is less than the access link data volume, and back haul link data volume and link data are flux matched.
For example:
00 expression coupling, 01 expression (back haul link data volume-access link data volume)>first thresholding, 10 expression (back haul link data volume-access link data volume)<second thresholdings;
Accordingly, existing back haul link data volume is kept in base station 20 after receiving 00, receive 01 rear minimizing back haul link downlink data amount, receives that 10 can suitably increase back haul link downlink data amount afterwards according to data status to be sent.
In specific implementation process, specifically adopt several bits, and the concrete meaning of bit is what can by notice RN equipment 10 after 20 settings of base station, also can be stipulated in agreement.
In specific implementation process, mode one and mode two RN equipment 10 are PUSCH (PhysicalUplink Shared channel, Physical Uplink Shared Channel) resource transmission of utilizing.
Owing to reporting the expense that takies very little, can utilize PUSCH resource or PUCCH (Physical Uplink Control channel, Physical Uplink Control Channel) resource transmission in the mode three.
That is to say, RN equipment 10 sends by PUSCH resource or PUCCH resource the flow scheduling parameter to the base station
Concrete, PUSCH resource: need not design special MAC CE, can utilize the reserved bit of the corresponding son head of other MAC CE or MAC SDU, be defined in transmission in certain specific MAC head.
That is to say, RN equipment 10 sends by the reserved bit in special-purpose PUCCH resource or the special MAC head flow scheduling parameter to the base station.
Such as the R bit transfer of utilizing among Fig. 5 A.
In order accurately to find the downlink data amount to report the MAC head at place, can stipulate that it is arranged in specific MAC head, as: upper row cache reports BSR corresponding MAC head or downlink data amount to report the sub-head of first MAC that triggers rear first uplink.
The PUCCH resource: the PUCCH resource is physical layer control resource, by the RRC signaling.Can configure the special-purpose PUCCH resource of 1 or 2 bits for reporting to RN.
Need to prove, the embodiment of the invention is not limited to above-mentioned transmission means, and other can all be suitable for the embodiment of the invention by the mode of PUSCH resource or PUCCH resource transmission flow scheduling parameter.
Wherein, the triggering mode of the triggering mode of mode three and mode one is similar, and Event triggered and periodic triggers are also arranged, and wherein Event triggered can be identical with Event triggered and the periodic triggers in the mode one with periodic triggers.
In the Event triggered such as mode three, can after satisfying, following condition confirm Event triggered:
(back haul link data volume-access link data volume) is greater than the first thresholding;
(back haul link data volume-access link data volume) is less than the second thresholding;
In specific implementation process, (back haul link data volume-access link data volume) can also be replaced with (back haul link data volume-access link data volume)/back haul link data volume.
For 1 bit, if there is not the expression position of " less than the second thresholding ", do not trigger when then satisfying " less than the second thresholding " condition.
Mode three also has a resource triggering mode, the padding of similar fashion one sets out, if namely the downlink data amount of regulation RN equipment 10 utilizes the R bit of special MAC head (such as the corresponding MAC head of up BSR) to report the triggering of can (giving the correct time such as up BSR) when this child head occurs.
Such as finish once trigger after the mode such as other all triggerings of cancellation and mode one similar, do not repeat them here.
For mode three, if after determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment RN equipment 10 can be according to the time sequencing that satisfies the first trigger condition, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter.
For mode three, RN equipment 10 can be deleted the last all triggerings determined before the first trigger condition of satisfying after the 20 transmitted traffic scheduling parameter of base station.
Mode four, report the state of 10 times specific user terminal of RN equipment.
Mode one, two, three all is based on the conceptual data amount control of interface, but congested just certain user terminal channel condition worsens suddenly and causes sometimes, so the report introduced the specific user terminal congestion state of mode four.
Because the data volume of mode four is larger, so mode four can adopt the MACCE bearer traffic scheduling parameter that is mapped on the PUSCH.
The down buffer storage data volume that RN equipment 10 is corresponding according to user terminal is determined the user terminal that need to carry out flow control; Carry out as required the sign of the user terminal of flow control, determine the flow scheduling parameter.
Can be with the sign of user terminal as the flow scheduling parameter such as: RN equipment 10.
The sign of user terminal can be to distribute to the C-RNTI of this user terminal (Cell Radio NetworkTemporary Identifier, Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) or the peculiar sign of user terminal.
Identical with mode one, also be to introduce a new MAC CE to be used for bearing downlink buffer status, i.e. DL buffer MAC here.
Concrete, RN equipment 10 usefulness MAC CE bearer traffic scheduling parameter, and particular logical channel number placed MAC head corresponding to this MAC CE, wherein to be used to indicate the loading section of MAC correspondence be the MAC CE of bearer traffic scheduling parameter to logical channel number; 20 send the MAC PDU that comprises this MACCE to the base station.
Wherein, the form of the MAC head that MAC CE is corresponding is identical with the form of the corresponding MAC head of DL buffer MAC CE in the mode one, specifically can be referring to Fig. 5 A.
In the mode four, the form of DL buffer MAC CE has a variety of, and the below enumerates several.
The sign of mode C1, report of user terminal and flow scheduling parameter.
Down buffer storage data volume corresponding to user terminal that RN equipment 10 carries out flow control with needs places the MAC CE of bearer traffic scheduling parameter, the flow scheduling parameter of this moment comprises the sign of user terminal and down buffer storage data volume two parts content of this terminal, specifically referring to Fig. 5 G.
The sign of mode C2, report of user terminal.
The flow scheduling parameter of this moment comprises the sign of user terminal, specifically referring to Fig. 5 H.
For mode four, RN equipment 10 can determine to satisfy the second trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine the flow scheduling parameter.
The flow scheduling parameter that can carry here is according to different modes, and the surplus resources capacity that needs is not identical yet, such as mode C1 the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 G need to be arranged; Mode C2 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 H.
Wherein, determine to satisfy the second trigger condition during a kind of in satisfying following condition of RN equipment 10:
The second triggering cycle arrived (being periodic triggers), and concrete can arrange DL buffer timer, and DLbuffer reports rear startup or restarts, and triggered reporting behind this timer expiry;
The down buffer storage data volume that user terminal is corresponding (being the value of back haul link data volume-access link data volume) is greater than the 3rd threshold value (being Event triggered);
The downlink transmission parameters that user terminal is corresponding (being the value of back haul link data volume-access link data volume) is greater than the 4th threshold value (being Event triggered), and wherein downlink transmission parameters equals the ratio (i.e. (value of back haul link data volume-access link data volume)/back haul link data volume) of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
In specific implementation process, RN equipment 10 can according to the user terminal of setting up in advance and the corresponding relation of threshold value, be determined the 3rd threshold value and the 4th threshold value that user terminal is corresponding; Or according to the type of service of setting up in advance and the corresponding relation of threshold value, determine to send to affiliated corresponding the 3rd threshold value and the 4th threshold value of type of service of data of user terminal.
Notice RN equipment 10 after the corresponding relation of the corresponding relation of user terminal and threshold value and type of service and threshold value can be set up by base station 20 also can be set in agreement.
Need to prove, above-mentioned two kinds of corresponding relations can be set and upgrade as required.
After the specific implementation process Shen might occur determining to satisfy a plurality of the second trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment can be according to the time sequencing that satisfies the second trigger condition, down buffer storage data volume when satisfying the second trigger condition according to the last time is determined the flow scheduling parameter.
Then trigger such as timer before this, after be that down buffer storage data volume corresponding to user terminal triggers greater than the 3rd threshold value, and after the down buffer storage data volume is greater than the 3rd threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment the down buffer storage data volume during greater than the 3rd threshold value according to the down buffer storage data volume is determined the flow scheduling parameter.
Because the down buffer storage data volume triggers greater than the 3rd threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment determined the flow scheduling parameter, and timer then triggers and is also keeping, so need the deletion timer to trigger, then RN equipment 10 is after the 20 transmitted traffic scheduling parameter of base station, and deletion the last time is satisfied all triggerings of determining before the second trigger condition.
Wherein mode four also can adopt padding to trigger, and concrete mode is identical with padding triggering mode in the mode one, does not repeat them here.
If periodic triggers and Event triggered, RN equipment 10 can determine that needs carry out the user terminal of flow control according to following manner:
When arriving in the second triggering cycle in satisfied the second trigger condition, RN equipment 10 is determined down buffer storage data volume corresponding to each user terminal, and the user terminal (such as the user terminal of down buffer storage data volume maximum) that the down buffer storage data volume is carried out flow control greater than the user terminal of first threshold as needs; Or determine downlink transmission parameters corresponding to each user terminal, and the user terminal (such as the user terminal of downlink transmission parameters maximum) that downlink transmission parameters is carried out flow control greater than the user terminal of Second Threshold as needs;
When to satisfy the second trigger condition be down buffer storage data volume corresponding to user terminal greater than downlink transmission parameters corresponding to the 3rd threshold value or user terminal greater than the 4th threshold value, RN equipment 10 carried out greater than the user terminal of the 4th threshold value the down buffer storage data volume user terminal of flow control as needs greater than the 3rd threshold value or downlink transmission parameters.
If padding triggers, RN equipment 10 can determine that needs carry out the user terminal of flow control according to following manner:
RN equipment 10 is determined down buffer storage data volume corresponding to each user terminal, and the user terminal (such as the user terminal of down buffer storage data volume maximum) that the down buffer storage data volume is carried out flow control greater than the user terminal of the 3rd threshold value as needs; Or
RN equipment 10 is determined downlink transmission parameters corresponding to each user terminal, and the user terminal (such as the user terminal of downlink transmission parameters maximum) that downlink transmission parameters is carried out flow control greater than the user terminal of the 4th threshold value as needs, wherein downlink transmission parameters equals the ratio of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
Wherein, each threshold value can be set as required, and concrete can set rear notice RN equipment 10 by base station 20, also can set in agreement.
In specific implementation process, after the Event triggered, when but the ascending resource time spent is arranged, RN equipment 10 can be by the highest service priority of the user terminal of correspondence or congested (being down buffer storage data volume or downlink transmission parameters) situation of user terminal, and order reports flow scheduling parameter corresponding to each user terminal from high in the end.
The priority that the priority of Event triggered can be higher than periodic triggers is higher than the priority that padding triggers, that is to say Event triggered cause report after, cancellation periodic triggers and padding trigger, periodic triggers cause report after, cancellation padding triggers.
Mode four can independently be used, and also can unite use with mode one, two or three.
In specific implementation process, the down buffer storage data volume of the embodiment of the invention can be according to this fixed timing statistics, and the cycle is added up; Can also add up the down buffer storage data volume in real time.
Need to prove, the embodiment of the invention is not limited to above-mentioned statistical, and other modes that can add up the down buffer storage data volume all are suitable for the embodiment of the invention.
Base station 20 is according to the flow scheduling parameter from RN equipment 10 of receiving, when adjusting the data volume of descending back haul link, if RN equipment 10 employing schemes four report, base station 20 is according to the flow scheduling parameter of receiving, adjust the data volume that sends to the respective user terminal in the descending back haul link, namely only reduce the downlink data amount that sends to specific user terminal (this user terminal identification is included among the DL buffer MAC CE).
In specific implementation process, when the data volume of descending back haul link is adjusted in base station 20, can also adjust the directly downlink resource of the grand user terminal of management of base station 20, when more such as RN equipment 10 down buffer storage data volumes, base station 20 is just many to grand user terminal allocation of downlink scheduling resource, reduces the downlink resource to RN equipment 10.
Base station 20 can also be according to the flow scheduling parameter, adjust the sub-frame number of descending back haul link, concrete, if the information that base station 20 reports according to RN equipment 10, determine that back haul link downlink data amount is lower than the access link data volume for a long time, then base station 20 can increase the number of DL backhaul subframe;
If back haul link downlink data amount is higher than the access link data volume for a long time, the DLbackhaul number of sub-frames can be reduced in base station 20, makes RN equipment 10 have more subframe to can be used for the downlink transfer of access link.
As shown in Figure 3A, embodiment of the invention RN equipment comprises: parameter determination module 100 and sending module 110.
Parameter determination module 100 is used for according to the down buffer storage data volume, determines the flow scheduling parameter;
Sending module 110 is used for sending the flow scheduling parameter that parameter determination module 100 is determined to the base station, and the data volume of descending back haul link is adjusted according to the flow scheduling parameter in the request base station.
Wherein, it is a variety of that parameter determination module 100 determines that the mode of flow scheduling parameter has, and the below enumerates several.
Mode one, the down buffer storage data volume that parameter determination module 100 is corresponding according to logic channel are determined the flow scheduling parameter;
Accordingly, sending module 110 usefulness units of data carry flow scheduling parameters, and data cell sent to the base station.
Wherein, data cell can be MAC CE, sending module 110 usefulness MAC CE bearer traffic scheduling parameter then, and logical channel number placed MAC corresponding to this MAC CE head, send the descending media access control protocol data unit MACPDU that comprises this MAC CE and corresponding MAC head to the base station, wherein logical channel number is used to indicate the MAC CE that loading section corresponding to MAC head is the flow scheduling parameter of carrying RN equipment.
Need to prove, the embodiment of the invention is not limited to MAC CE, all is to use the embodiment of the invention as long as the flow scheduling parameter can be sent to the data cell of base station.
Concrete, parameter determination module 100 has the various ways down buffer storage data volume corresponding according to logic channel, determines the flow scheduling parameter.
1, parameter determination module 100 is determined down buffer storage data volume sum corresponding to all logic channels, and according to down buffer storage data volume sum, determines the flow scheduling parameter.
2, parameter determination module 100 is according to the logic channel group of dividing in advance, determine the logic channel in each logic channel group, when only having a logic channel in the logic channel group that corresponding down buffer storage data are arranged, determine the down buffer storage data volume that this logic channel group is corresponding, the down buffer storage data volume corresponding according to this logic channel group determined the flow scheduling parameter;
Accordingly, the RN equipment of the embodiment of the invention can further include: the first processing module 120, and referring to Fig. 3 B.
The first processing module 120, be used for the corresponding relation according to predefined logic channel group and logic channel group sign, determine the logic channel group sign that this logic channel group is corresponding, after the logic channel group sign and flow scheduling Wire Parameters determined, place the MAC CE of bearer traffic scheduling parameter.
3, parameter determination module 100 is according to the logic channel group of dividing in advance, determine the logic channel in each logic channel group, when the logic channel in a plurality of logic channel groups are arranged has corresponding down buffer storage data, determine the down buffer storage data volume that all logic channel groups are corresponding, according to the value of down buffer storage data volume corresponding to each logic channel group, determine the flow scheduling parameter that each logic channel group is corresponding respectively;
Accordingly, the RN equipment of the embodiment of the invention can further include: the second processing module 130, and referring to Fig. 3 B.
The second processing module 130 is for the MAC CE that each flow scheduling parameter is placed the bearer traffic scheduling parameter.
Mode two, logic channel group can be divided according to the residential quarter, and all logic channels in each logic channel group of then dividing in advance belong to same residential quarter; Then embodiment of the invention RN equipment can further include: the 3rd processing module 140, and referring to Fig. 3 C.
The 3rd processing module 140, be used for to determine that cell ID corresponding to each logic channel group, the cell ID that each logic channel group is corresponding place the MAC CE of MAC corresponding to the MAC CE of bearer traffic scheduling parameter or bearer traffic scheduling parameter or as the MAC PDU head of MAC independently.
Mode three, parameter determination module 100 be according to the down buffer storage data volume, determines corresponding link information bit value, and according to the link information bit value, determine the value of flow scheduling parameter, and wherein the link information bit value is used to indicate the state of down buffer storage data volume;
Accordingly, sending module 110 sends by PUSCH resource or PUCCH resource the flow scheduling parameter to the base station.
Concrete, if send to the base station by the PUSCH resource, sending module 110 sends by the reserved bit in special-purpose PUCCH resource or the special MAC head flow scheduling parameter to the base station.
For mode one, two and three, embodiment of the invention RN equipment can further include: the first trigger module 150, and referring to Fig. 3 D.
The first trigger module 150 be used for to determine satisfies the first trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, trigger parameter determination module 100 is determined the flow scheduling parameters;
Accordingly, parameter determination module 100 is according to the time sequencing that satisfies the first trigger condition, and the down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter.
Wherein, determine to satisfy the first trigger condition during a kind of in satisfying following condition of the first trigger module 100:
The first triggering cycle arrived;
The down buffer storage data volume is greater than the first threshold value;
The down buffer storage data volume is less than the second threshold value.
For mode one, two and three, the RN equipment of the embodiment of the invention can further include: the first removing module 160, and referring to Fig. 3 D.
The first removing module 160 is used at sending module 110 after the transmitted traffic scheduling parameter of base station,
All triggerings of determining before the last satisfied the first trigger condition of deletion.
For mode one, two and three, embodiment of the invention RN equipment can further include: the second trigger module 170, and referring to Fig. 3 D.
The second trigger module 170, be used for to determine the back haul link uplink have can the surplus resources of bearer traffic scheduling parameter after, the trigger parameter determination module is determined the flow scheduling parameter.
Four, the parameter determination module 100 down buffer storage data volume corresponding according to user terminal determined the user terminal need to carry out flow control, carries out as required the sign of the user terminal of flow control, determines the flow scheduling parameter;
Accordingly, sending module 110 usefulness MAC CE bearer traffic scheduling parameter, and particular logical channel number placed MAC head corresponding to this MAC CE, the logical channel number MAC CE that to be used to indicate MAC corresponding loading section be the bearer traffic scheduling parameter wherein, send the MAC PDU that comprises this MAC CE to the base station, be used for the request base station according to the flow scheduling parameter of receiving, adjust the data volume that sends to user terminal in the descending back haul link.
For mode four, embodiment of the invention RN equipment can further include: manages module 180 everywhere, referring to Fig. 3 E.
The manages module 180 everywhere, is used for down buffer storage data volume corresponding to user terminal that needs carry out flow control placed the MAC CE of bearer traffic scheduling parameter.
For mode four, embodiment of the invention RN equipment can further include: the 3rd trigger module 190, and referring to Fig. 3 E.
The 3rd trigger module 190 be used for to determine satisfies the second trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, the trigger parameter determination module is determined the flow scheduling parameter;
Accordingly, parameter determination module 100 is according to the time sequencing that satisfies the second trigger condition, and the down buffer storage data volume when satisfying the second trigger condition according to the last time is determined the flow scheduling parameter.
Wherein, determine to satisfy the second trigger condition during a kind of in satisfying following condition of the 3rd trigger module 190:
The second triggering cycle arrived;
Down buffer storage data volume corresponding to user terminal is greater than the 3rd threshold value;
Downlink transmission parameters corresponding to user terminal be greater than the 4th threshold value, and wherein downlink transmission parameters equals the ratio of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
The 3rd trigger module 190 can also according to the user terminal of setting up in advance and the corresponding relation of threshold value, be determined the 3rd threshold value and the 4th threshold value that user terminal is corresponding; Or
According to the type of service of setting up in advance and the corresponding relation of threshold value, determine to send to affiliated corresponding the 3rd threshold value and the 4th threshold value of type of service of data of user terminal.
Parameter determination module 100 is when arriving in the second triggering cycle in satisfied the second trigger condition, determine the down buffer storage data volume that each user terminal is corresponding, and the down buffer storage data volume is carried out the user terminal of flow control greater than the user terminal of first threshold as needs; Or determine downlink transmission parameters corresponding to each user terminal, and the user terminal that downlink transmission parameters is carried out flow control greater than the user terminal of Second Threshold as needs;
When to satisfy the second trigger condition be down buffer storage data volume corresponding to user terminal greater than downlink transmission parameters corresponding to the 3rd threshold value or user terminal greater than the 4th threshold value, the user terminal that the down buffer storage data volume is carried out flow control greater than the 3rd threshold value or downlink transmission parameters greater than the user terminal of the 4th threshold value as needs.
For mode four, the RN equipment of the embodiment of the invention can further include: the second removing module 191, and referring to Fig. 3 E.
The second removing module 191 is used at sending module 110 after the transmitted traffic scheduling parameter of base station, all triggerings of determining before the last satisfied the second trigger condition of deletion.
For mode four, the RN equipment of the embodiment of the invention can further include: the 4th trigger module 192, and referring to Fig. 3 E.
The 4th trigger module 192, be used for to determine the back haul link uplink have can the surplus resources of bearer traffic scheduling parameter after, the trigger parameter determination module is determined the flow scheduling parameter.
For mode four, parameter determination module 100 is determined down buffer storage data volume corresponding to each user terminal, and the user terminal that the down buffer storage data volume is carried out flow control greater than the user terminal of the 3rd threshold value as needs; Or
Determine the downlink transmission parameters that each user terminal is corresponding, and the user terminal that downlink transmission parameters is carried out flow control greater than the user terminal of the 4th threshold value as needs, wherein downlink transmission parameters equals the ratio of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
As shown in Figure 4, embodiment of the invention base station comprises: receiver module 200 and adjusting module 210.
Receiver module 200 is used for receiving the flow scheduling parameter from RN equipment.
Adjusting module 210 for the flow scheduling parameter of receiving according to receiver module 200, is adjusted the data volume of descending back haul link.
If wherein RN equipment adopts the mode four of introducing above to report, then receiver module 200 also can receive the sign from the user terminal of RN equipment;
Accordingly, adjusting module 210 is adjusted the data volume that sends to user terminal corresponding to sign in the descending back haul link according to the flow scheduling parameter of receiving.
In specific implementation process, when adjusting module 210 is adjusted the data volume of descending back haul link, can also according to the flow scheduling parameter, adjust the downlink resource of the grand user terminal of directly managing the base station.
Adjusting module 210 can also be according to the flow scheduling parameter, adjust the sub-frame number of descending back haul link, concrete, if the information that adjusting module 210 reports according to RN equipment, determine that back haul link downlink data amount is lower than the access link data volume for a long time, then adjusting module 210 can increase the number of DL backhaul subframe;
If back haul link downlink data amount is higher than the access link data volume for a long time, adjusting module 210 can reduce DL backhaul number of sub-frames.
As shown in Figure 6, the method for embodiment of the invention the first adjustment data volume comprises the following steps:
Step 601, RN equipment are determined the flow scheduling parameter according to the down buffer storage data volume.
Step 602, RN equipment are to base station transmitted traffic scheduling parameter, and the data volume of descending back haul link is adjusted according to the flow scheduling parameter in the request base station.
In the step 601, RN equipment is according to the down buffer storage data volume, and the mode of determining the flow scheduling parameter has a variety of, and the below enumerates several.
Mode one, report the down buffer storage state of all residential quarters under the RN equipment.
The down buffer storage data volume that RN equipment is corresponding according to logic channel is determined the flow scheduling parameter.
Wherein, the down buffer storage data volume corresponding according to logic channel, the mode of determining the flow scheduling parameter has again a variety of, and the below enumerates several.
Mode A1, RN equipment are determined down buffer storage data volume sum corresponding to self all logic channel, and according to down buffer storage data volume sum, determine the flow scheduling parameter.
The mode A1 that the mode A1 here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
Need to prove, the embodiment of the invention is not limited to above-mentioned dual mode, and other can be according to down buffer storage data volume sum, and the mode of determining the flow scheduling parameter all is to use the embodiment of the invention.
Mode A2, RN equipment 10 are determined the logic channel in each logic channel group according to the logic channel group of dividing in advance;
When only having a logic channel in the logic channel group that corresponding down buffer storage data are arranged, determine the down buffer storage data volume that this logic channel group is corresponding;
The down buffer storage data volume corresponding according to this logic channel group determined the flow scheduling parameter.
The mode A2 that the mode A2 here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
Need to prove, the embodiment of the invention is not limited to above-mentioned dual mode, and other can be according to down buffer storage data volume sum, and the mode of determining the flow scheduling parameter all is to use the embodiment of the invention.
Mode A3, RN equipment 10 are determined the logic channel in each logic channel group according to the logic channel group of dividing in advance;
When the logic channel in a plurality of logic channel groups are arranged has corresponding down buffer storage data, determine the down buffer storage data volume that all logic channel groups are corresponding;
The down buffer storage data volume corresponding according to each logic channel group determined the flow scheduling parameter that each logic channel group is corresponding respectively.
The mode A3 that the mode A3 here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
Wherein, the logic channel group among mode A2 and the A3 can be divided rear notice RN equipment by the base station, also can be by being stored in respectively in RN equipment and the base station after the agreement regulation.The logicality of dividing can be adjusted as required to group.Because mode A2 and A3 do not need distinguishing cell, so in the logic channel group for mode A2 and A3, the logic channel of same logic channel group can belong to same residential quarter also can belong to different districts.
For mode one, in the step 602, RN equipment can place data cell with the flow scheduling parameter during to base station transmitted traffic scheduling parameter.
Here can introduce a new MAC CE and be used for the bearing downlink buffer status, for convenience of description hereinafter to be referred as DL buffer MAC CE.Then data cell can be MAC CE.
Need to prove, the embodiment of the invention is not limited to MAC CE, all is to use the embodiment of the invention as long as the flow scheduling parameter can be sent to the data cell of base station.
Concrete, RN equipment MAC CE bearer traffic scheduling parameter, and logical channel number placed MAC corresponding to this MAC CE head, wherein to be used to indicate loading section corresponding to MAC head be the MAC CE (being DL buffer MAC CE) that carries the flow scheduling parameter of RN equipment to logical channel number;
RN equipment sends the MAC PDU that comprises this MAC CE and corresponding MAC head to the base station.
No matter be mode A1, A2 and A3, the form of the corresponding MAC head of DL buffer MAC CE all is the same, referring to Fig. 5 A.
In specific implementation process, the DL buffer MAC CE of mode A1, A2 and A3 can be different.
The DL buffer MAC CE of mode A1 because mode A1 does not distinguish logic channel corresponding to down buffer storage data, only carries out total amount and reports shown in Fig. 5 B, so also do not need in the DL buffer MAC CE form to divide.
The DL buffer MAC CE of mode A2 is shown in Fig. 5 C, owing to only having a logic channel group that the down buffer storage data volume is arranged, so only need to report this logic channel group to get final product, which logic channel group in order to allow the base station know, RN equipment can be according to the corresponding relation of predefined logic channel group and logic channel group sign, determine the logic channel group sign that this logic channel group is corresponding, after the logic channel group sign and the binding of down buffer storage data volume determined, place the MAC CE of bearer traffic scheduling parameter.
Wherein, notice RN equipment after the corresponding relation of logic channel group and logic channel group sign can be set up by the base station also can be by being stored in respectively in RN equipment and the base station after the agreement regulation.
Need to prove, the embodiment of the invention is not limited to the form of Fig. 5 C, and other DL buffer MAC CE forms that logic channel group sign and flow scheduling parameter can be sent to the base station all are suitable for the embodiment of the invention.
The DL buffer MAC CE of mode A3 is shown in Fig. 5 D, owing to there being a plurality of logic channel groups that the down buffer storage data volume is arranged, so each flow scheduling parameter can be placed in order the MAC CE of bearer traffic scheduling parameter.
For mode one, in the step 601, RN equipment can determine satisfy the first trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine the flow scheduling parameter.
The flow scheduling parameter that can carry here is according to different modes, and the surplus resources capacity that needs is not identical yet, such as mode A1 the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 B need to be arranged; Mode A2 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 C; Mode A3 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 D.
Wherein, determine to satisfy the first trigger condition during a kind of in satisfying following condition of RN equipment:
The first triggering cycle arrived (being periodic triggers), and concrete can arrange DL buffer timer, and DLbuffer reports rear startup or restarts, and triggered reporting behind this timer expiry;
Greater than the first threshold value (being Event triggered), the down buffer storage data volume here also can replace to access link downlink resource utilance to down buffer storage data volume (being the value of back haul link data volume-access link data volume);
Less than the second threshold value (being Event triggered), the down buffer storage data volume here also can replace to access link downlink resource utilance to down buffer storage data volume (being the value of back haul link data volume-access link data volume).
The first threshold value and the second threshold value can arrange as required, such as can rear notice RN equipment being set by the base station, also can be arranged by RN equipment, can also manually be provided with and store in the RN equipment.
After in specific implementation process, might occurring determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment RN equipment can be according to the time sequencing that satisfies the first trigger condition in the step 601, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter.
Then trigger such as timer before this, after be that the down buffer storage data volume triggers greater than the first threshold value, and after the down buffer storage data volume triggers greater than the first threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, down buffer storage data volume when at this moment triggering greater than the first threshold value according to the down buffer storage data volume is determined the flow scheduling parameter.
Because the down buffer storage data volume triggers greater than the first threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment determined the flow scheduling parameter, and timer then triggers and is also keeping, so need the deletion timer to trigger, then can further include after the step 602:
All triggerings of determining before the last satisfied the first trigger condition of RN unit deletion.
For mode one, in the step 601, RN equipment can also determine to have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine flow scheduling parameter (being that padding triggers).
The flow scheduling parameter that can carry during Padding triggers is according to different modes, and the surplus resources capacity that needs is not identical yet, concrete back haul link uplink have surplus resources can with and can hold DL
When buffer MAC CE and MAC, can determine to have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources.
In specific implementation process, the priority of Event triggered and periodic triggers can be higher than the priority that padding triggers.
Mode two, report the down buffer storage state of each residential quarter under the RN equipment.
Wherein, whether mode two can distinguish upstream data from the different districts of RN equipment according to the base station again, is divided into dual mode.
The upstream data from the different districts of RN equipment can be distinguished in mode B1, base station.
The mode B1 that the mode B1 here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
The upstream data from the different districts of RN equipment 10 can not be distinguished in mode B2, base station 20.
The mode B2 that the mode B2 here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
If adopt the mode A1 in the similar fashion one, then can in the DL of Fig. 5 B buffer MAC CE, add cell ID, and what RN equipment was determined is not down buffer storage data volume sums corresponding to self all logic channel, but determines down buffer storage data volume sum corresponding to all logic channels under the same residential quarter.
If adopt mode A2 or A3 (namely dividing the logic channel group) in the similar fashion one, then can in the DL buffer of Fig. 5 C and Fig. 5 D MAC CE, add cell ID, and when dividing the logic channel group, all logic channels in the same logic channel group belong to same residential quarter.
Except the mode of interpolation cell ID above-mentioned, also have some general modes, namely no matter concrete which kind of mode in the employing mode one all is suitable for, specifically can be referring to 5E and 5F.
The triggering mode of the triggering mode of mode two and mode one is similar, does not repeat them here.
For mode two, in the step 601, if after determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, RN equipment can be according to the time sequencing that satisfies the first trigger condition, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter;
For mode two, can further include after the step 602:
RN equipment can be deleted the last all triggerings determined before the first trigger condition of satisfying.
Mode three, represent the state of current back haul link downlink transmission data amount with 1~2 bit.
RN equipment is according to the down buffer storage data volume, determines corresponding link information bit value, and according to the link information bit value, determines the value of flow scheduling parameter, and wherein the link information bit value is used to indicate the state of down buffer storage data volume.
Mode three and mode one and two differences are that RN equipment with the value of link information bit value as the flow scheduling parameter, compares the amount of bits that mode one and mode two can reduce transmission like this.
The mode three that the mode three here and the embodiment of the invention are adjusted in the system of data volume is identical, does not repeat them here.
In specific implementation process, specifically adopt several bits, and the concrete meaning of bit is what can by notice RN equipment after the base station sets, also can be stipulated in agreement.
In specific implementation process, mode one and mode two RN equipment are PUSCH resource transmission of utilizing.
Owing to reporting the expense that takies very little, can utilize PUSCH resource or PUCCH resource transmission in the mode three.
That is to say, in the step 602, RN equipment sends by PUSCH resource or PUCCH resource the flow scheduling parameter to the base station
Concrete, PUSCH resource: need not design special MAC CE, can utilize the reserved bit of the corresponding son head of other MAC CE or MAC SDU, be defined in transmission in certain specific MAC head.
That is to say, RN equipment sends by the reserved bit in special-purpose PUCCH resource or the special MAC head flow scheduling parameter to the base station.
Such as the R bit transfer of utilizing among Fig. 5 A.
In order accurately to find the downlink data amount to report the MAC head at place, can stipulate that it is arranged in specific MAC head, as: upper row cache reports BSR corresponding MAC head or downlink data amount to report the sub-head of first MAC that triggers rear first uplink.
The PUCCH resource: the PUCCH resource is physical layer control resource, by the RRC signaling.Can configure the special-purpose PUCCH resource of 1 or 2 bits for reporting to RN.
Need to prove, the embodiment of the invention is not limited to above-mentioned transmission means, and other can all be suitable for the embodiment of the invention by the mode of PUSCH resource or PUCCH resource transmission flow scheduling parameter.
In the step 601, the triggering mode of the triggering mode of mode three and mode one is similar, and Event triggered and periodic triggers are also arranged, and wherein Event triggered can be identical with Event triggered and the periodic triggers in the mode one with periodic triggers.
In the Event triggered such as mode three, can after satisfying, following condition confirm Event triggered:
(back haul link data volume-access link data volume) is greater than the first thresholding;
(back haul link data volume-access link data volume) is less than the second thresholding;
In specific implementation process, (back haul link data volume-access link data volume) can also be replaced with (back haul link data volume-access link data volume)/back haul link data volume.
For 1 bit, if there is not the expression position of " less than the second thresholding ", do not trigger when then satisfying " less than the second thresholding " condition.
Mode three also has a resource triggering mode, the padding of similar fashion one sets out, be in the step 601, if the downlink data amount of regulation RN equipment utilizes the R bit of special MAC head (such as the corresponding MAC head of up BSR) to report the triggering of can (giving the correct time such as up BSR) when this child head occurs.
Such as finish once trigger after the mode such as other all triggerings of cancellation and mode one similar, do not repeat them here.
For mode three, in the step 601, if after determining to satisfy a plurality of the first trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, RN equipment can be according to the time sequencing that satisfies the first trigger condition, down buffer storage data volume when satisfying the first trigger condition according to the last time is determined the flow scheduling parameter;
For mode three, can further include after the step 602:
RN equipment can be deleted the last all triggerings determined before the first trigger condition of satisfying.
Mode four, report the state of 10 times specific user terminal of RN equipment.
Mode one, two, three all is based on the conceptual data amount control of interface, but congested just certain user terminal channel condition worsens suddenly and causes sometimes, so the report introduced the specific user terminal congestion state of mode four.
Because the data volume of mode four is larger, so mode four can adopt the MACCE bearer traffic scheduling parameter that is mapped on the PUSCH.
The down buffer storage data volume that RN equipment is corresponding according to user terminal is determined the user terminal that need to carry out flow control; Carry out as required the sign of the user terminal of flow control, determine the flow scheduling parameter.
Can be with the sign of user terminal as the flow scheduling parameter such as: RN equipment.
The sign of user terminal can be to distribute to C-RNTI or the peculiar sign of user terminal of this user terminal.
Identical with mode one, also be to introduce a new MAC CE to be used for bearing downlink buffer status, i.e. DL buffer MAC here.
Concrete, in the step 602, RN equipment is with MAC CE bearer traffic scheduling parameter, and particular logical channel number is placed MAC head corresponding to this MAC CE, and wherein to be used to indicate the loading section of MAC correspondence be the MAC CE of bearer traffic scheduling parameter to logical channel number; Send the MAC PDU that comprises this MAC CE to the base station.
Wherein, the form of the MAC head that MAC CE is corresponding is identical with the form of the corresponding MAC head of DL buffer MAC CE in the mode one, specifically can be referring to Fig. 5 A.
In the mode four, the form of DL buffer MAC CE has a variety of, and the below enumerates several.
The sign of mode C1, report of user terminal and flow scheduling parameter.
Down buffer storage data volume corresponding to user terminal that RN equipment carries out flow control with needs places the MAC CE of bearer traffic scheduling parameter, the flow scheduling parameter of this moment comprises the sign of user terminal and down buffer storage data volume two parts content of this terminal,, specifically referring to Fig. 5 G.
The sign of mode C2, report of user terminal.
The flow scheduling parameter of this moment comprises the sign of user terminal, specifically referring to Fig. 5 H.
For mode four, in the step 601, RN equipment can determine to satisfy the second trigger condition, and have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources the time, determine the flow scheduling parameter.
The flow scheduling parameter that can carry here is according to different modes, and the surplus resources capacity that needs is not identical yet, such as mode C1 the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 G need to be arranged; Mode C2 need to have the surplus resources that can carry the form shown in Fig. 5 A and Fig. 5 H.
Wherein, determine to satisfy the second trigger condition during a kind of in satisfying following condition of RN equipment:
The second triggering cycle arrived (being periodic triggers), and concrete can arrange DL buffer timer, and DLbuffer reports rear startup or restarts, and triggered reporting behind this timer expiry;
The down buffer storage data volume that user terminal is corresponding (being the value of back haul link data volume-access link data volume) is greater than the 3rd threshold value (being Event triggered);
The downlink transmission parameters that user terminal is corresponding (being the value of back haul link data volume-access link data volume) is greater than the 4th threshold value (being Event triggered), and wherein downlink transmission parameters equals the ratio (i.e. (value of back haul link data volume-access link data volume)/back haul link data volume) of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
In specific implementation process, RN equipment can according to the user terminal of setting up in advance and the corresponding relation of threshold value, be determined the 3rd threshold value and the 4th threshold value that user terminal is corresponding; Or according to the type of service of setting up in advance and the corresponding relation of threshold value, determine to send to affiliated corresponding the 3rd threshold value and the 4th threshold value of type of service of data of user terminal.
Notice RN equipment after the corresponding relation of the corresponding relation of user terminal and threshold value and type of service and threshold value can be set up by the base station also can be set in agreement.
Need to prove, above-mentioned two kinds of corresponding relations can be set and upgrade as required.
For mode four, in the step 601, after might occurring determining to satisfy a plurality of the second trigger conditions, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment RN equipment can be according to the time sequencing that satisfies the second trigger condition, down buffer storage data volume when satisfying the second trigger condition according to the last time is determined the flow scheduling parameter.
Then trigger such as timer before this, after be that down buffer storage data volume corresponding to user terminal triggers greater than the 3rd threshold value, and after the down buffer storage data volume is greater than the 3rd threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment the down buffer storage data volume during greater than the 3rd threshold value according to the down buffer storage data volume is determined the flow scheduling parameter.
Because the down buffer storage data volume triggers greater than the 3rd threshold value, just have in the back haul link uplink can the bearer traffic scheduling parameter surplus resources, at this moment determined the flow scheduling parameter, and timer then triggers and is also keeping, so need the deletion timer to trigger, then for mode four, can further include after the step 602:
All triggerings of determining before the last satisfied the second trigger condition of RN unit deletion.
Wherein mode four also can adopt padding to trigger, and concrete mode is identical with padding triggering mode in the mode one, does not repeat them here.
If periodic triggers and Event triggered, in the step 601, RN equipment can determine that needs carry out the user terminal of flow control according to following manner:
When arriving in the second triggering cycle in satisfied the second trigger condition, RN equipment is determined the down buffer storage data volume that each user terminal is corresponding, and the down buffer storage data volume is carried out the user terminal (such as the user terminal of down buffer storage data volume maximum) of flow control as needs greater than the user terminal of first threshold; Or determine downlink transmission parameters corresponding to each user terminal, and the user terminal (such as the user terminal of downlink transmission parameters maximum) that downlink transmission parameters is carried out flow control greater than the user terminal of Second Threshold as needs;
When to satisfy the second trigger condition be down buffer storage data volume corresponding to user terminal greater than downlink transmission parameters corresponding to the 3rd threshold value or user terminal greater than the 4th threshold value, RN equipment carried out greater than the user terminal of the 4th threshold value the down buffer storage data volume user terminal of flow control as needs greater than the 3rd threshold value or downlink transmission parameters.
If padding triggers, in the step 601, RN equipment can determine that needs carry out the user terminal of flow control according to following manner:
RN equipment is determined the down buffer storage data volume that each user terminal is corresponding, and the down buffer storage data volume is carried out the user terminal (such as the user terminal of down buffer storage data volume maximum) of flow control as needs greater than the user terminal of the 3rd threshold value; Or
RN equipment is determined the downlink transmission parameters that each user terminal is corresponding, and the user terminal (such as the user terminal of downlink transmission parameters maximum) that downlink transmission parameters is carried out flow control greater than the user terminal of the 4th threshold value as needs, wherein downlink transmission parameters equals the ratio of back haul link data volume corresponding to down buffer storage data volume corresponding to user terminal and this family terminal.
Wherein, each threshold value can be set as required, and concrete can by notice RN equipment after the base station sets, also can set in agreement.
In the step 602, after the Event triggered, when but the ascending resource time spent is arranged, RN equipment can be by the highest service priority of the user terminal of correspondence or congested (being down buffer storage data volume or downlink transmission parameters) situation of user terminal, and order reports flow scheduling parameter corresponding to each user terminal from high in the end.
The priority that the priority of Event triggered can be higher than periodic triggers is higher than the priority that padding triggers, that is to say Event triggered cause report after, cancellation periodic triggers and padding trigger, periodic triggers cause report after, cancellation padding triggers.
In specific implementation process, mode four can independently be used, and also can unite use with mode one, two or three.
In specific implementation process, the down buffer storage data volume of the embodiment of the invention can be according to this fixed timing statistics, and the cycle is added up; Can also add up the down buffer storage data volume in real time.
Need to prove, the embodiment of the invention is not limited to above-mentioned statistical, and other modes that can add up the down buffer storage data volume all are suitable for the embodiment of the invention.
Wherein, can further include after the step 602:
The data volume of descending back haul link is adjusted according to the flow scheduling parameter of receiving in step 603, base station.
In specific implementation process, the base station is according to the flow scheduling parameter from RN equipment of receiving, when adjusting the data volume of descending back haul link, if RN equipment adopts scheme four to report, the base station is according to the flow scheduling parameter of receiving, adjust the data volume that sends to the respective user terminal in the descending back haul link, namely only reduce the downlink data amount that sends to specific user terminal (this user terminal identification is included among the DL buffer MAC CE).
In the step 603, when the data volume of descending back haul link is adjusted in the base station, can also adjust the directly downlink resource of the grand user terminal of management of base station, when more such as RN equipment down buffer storage data volume, the base station is just many to grand user terminal allocation of downlink scheduling resource, reduces the downlink resource to RN equipment.
The base station can also be according to the flow scheduling parameter, adjust the sub-frame number of descending back haul link, concrete, if the information that the base station reports according to RN equipment, determine that back haul link downlink data amount is lower than the access link data volume for a long time, then the base station can increase the number of DL backhaul subframe;
If back haul link downlink data amount is higher than the access link data volume for a long time, the DLbackhaul number of sub-frames can be reduced in the base station, makes RN equipment have more subframe to can be used for the downlink transfer of access link.
As shown in Figure 7, the method for embodiment of the invention the second adjustment data volume comprises the following steps:
Step 701, base station receive the flow scheduling parameter from RN equipment, and wherein the flow scheduling parameter is that RN equipment is determined according to the down buffer storage data volume.
Wherein, RN equipment is determined the particular content of flow scheduling parameter according to the down buffer storage data volume, can adjust referring to the embodiment of the invention the first corresponding contents of the method for data volume, does not repeat them here.
Step 702, base station according to receive according to the flow scheduling parameter, adjust the data volume of descending back haul link.
Wherein, the particular content of the data volume of descending back haul link is adjusted according to the flow scheduling parameter in the base station, can adjust referring to the embodiment of the invention the first corresponding contents of the method for data volume, does not repeat them here.
If the base station also receives the sign from the user terminal of RN equipment in the step 701; Then the data volume that sends to user terminal corresponding to sign in the descending back haul link is adjusted according to the flow scheduling parameter of receiving in the base station, base station in the step 702.
In the step 702, self directly downlink resource of the grand UE of management can also according to the flow scheduling parameter, be adjusted in the base station.
Wherein, the corresponding contents of the method for data volume can be adjusted referring to embodiment of the invention the first according to the particular content of the downlink resource of the grand UE of flow scheduling parameter adjustment in the base station, does not repeat them here.
In the step 702, the sub-frame number of descending back haul link can also according to the flow scheduling parameter, be adjusted in the base station.
Wherein, the corresponding contents of the method for data volume can be adjusted referring to embodiment of the invention the first according to the particular content according to the sub-frame number of the descending back haul link of flow scheduling parameter adjustment in the base station, does not repeat them here.
Can find out from above-described embodiment: embodiment of the invention RN equipment is determined the flow scheduling parameter according to the down buffer storage data volume; RN equipment asks described base station according to described flow scheduling parameter to base station transmitted traffic scheduling parameter, adjusts the data volume of descending back haul link.
Because DeNB can control the downlink data amount in the LTE-A system, avoid because the very difficult downlink data downlink data congested or R-UE of the downlink data amount being controlled the RN equipment of appearance of DeNB postpones, thereby reduced the delay of downlink data, improved data transmission efficiency and systematic function.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.