CN102056242B - Method, system and equipment for controlling flow of backhaul link - Google Patents

Method, system and equipment for controlling flow of backhaul link Download PDF

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CN102056242B
CN102056242B CN200910236701.4A CN200910236701A CN102056242B CN 102056242 B CN102056242 B CN 102056242B CN 200910236701 A CN200910236701 A CN 200910236701A CN 102056242 B CN102056242 B CN 102056242B
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downlink
downlink data
denb
rate adjustment
adjustment request
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CN102056242A (en
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刘佳敏
谌丽
鲍炜
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Abstract

The embodiment of the invention discloses method, system and equipment for controlling the flow of a backhaul link. The method comprises the following steps: a relay node (RN) acquires a downlink data traffic measurement result; the RN judges whether the downlink data traffic measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering to send a downlink speed adjustment request; when the RN judges that the downlink data traffic measurement result meets the preset trigger condition, the RN sends the downlink speed adjustment request to a donor evolved node B (DeNB), so that the DeNB adjusts the downlink data scheduling and transmission on the backhaul link according to the downlink speed adjustment request; and otherwise, the RN doesn't send the downlink speed adjustment request to the DeNB. The invention avoids the mismatch of data stream between the backhaul link and the access link, so as to solve the problem of downlink data congestion of the RN or downlink data delay of the relay user equipment (R-UE), as well as the problem of waste of the resources on the backhaul link.

Description

Method, system and equipment for controlling flow of backhaul link
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a system, and a device for controlling backhaul link flow.
Background
After the LTE-a (LTE-Advanced, LTE-Advanced evolution) system introduces Relay, as shown in fig. 1, the following nodes, interfaces, and links are defined: the Node comprises a DeNB (Donor eNB), which is an Evolved Node B (Evolved Node B) having a wireless connection with the RN; a RN (Relay-Node), which is an entity existing between a DeNB and a UE (User Equipment); R-UE (Relay-UE), which is a UE performing data interaction with RN, may be LTE (Long Term Evolution) UE; and the macro UE is a UE directly performing data interaction with the DeNB and is independent of the RN. The interface includes: a Un interface which is an interface between the RN and the DeNB; and the Uu interface is an interface between the UE and the RN. The wireless link includes: a Backhaul link, which is a link corresponding to the Un interface; an Access link (Access link) corresponding to the Uu interface; a Direct link (Direct link), which is a link between the DeNB and the macro UE for data transmission, is independent of the RN.
The downlink transmission process after the RN is introduced is as follows: data reaching R-UE under RN needs to be sent to RN by DeNB via downlink backhaul link, and then sent to R-UE by RN via downlink access link; the uplink transmission process after the RN is introduced is as follows: uplink transmission of the R-UE under the RN is firstly sent to the RN by the R-UE through an uplink access link and then sent to the DeNB by the RN through a backhaul link. The backhaul link and the access link are two independent wireless links, and have different link characteristics and channel transmission quality, and a typical scenario is that the backhaul link has better channel quality than the access link. For downlink transmission after the RNs are introduced, the DeNB performs scheduling decision and resource allocation according to the configuration of the backhaul link and the priority condition of data sent to each RN, and transmits the data to the RNs. And each RN performs scheduling decision and resource allocation according to the downlink data received by the RN and transmits the data to each R-UE.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
the existing system after the RN is introduced has no downlink data flow control mechanism, which may cause the data flow of the backhaul link and the access link to be mismatched, thereby bringing the problems of RN downlink data congestion or R-UE downlink data delay and resource waste on the backhaul link.
Disclosure of Invention
Embodiments of the present invention provide a method, a system, and a device for controlling backhaul link flow, which are used to avoid data flow mismatch between a backhaul link and an access link, thereby solving the problems of RN downlink data congestion or R-UE downlink data delay, and resource waste on the backhaul link.
An embodiment of the present invention provides a method for controlling backhaul link flow, including:
the RN acquires a downlink data traffic volume measurement result;
the RN judges whether the downlink data traffic measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request;
when the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition, the RN sends a downlink rate adjustment request to the DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a return link according to the downlink rate adjustment request; otherwise, the RN does not send a downlink rate adjustment request to the DeNB; wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval.
Wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or the logical channel of the RN has packet loss caused by Discard _ Timer timeout; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
Wherein, the sending, by the RN, the downlink rate adjustment request to the DeNB includes:
the RN sends a request for suspending or resuming sending downlink data to the RN to the DeNB; or
And the RN sends a request for adjusting up or down to send a downlink data rate to the RN to the DeNB.
Wherein, when the RN sends a downlink rate adjustment request to the DeNB,
the sending mode comprises the following steps: reporting through an RRC layer; or reporting through an MAC layer;
the transmission format includes: using a bit to indicate to pause or resume sending downlink data to the RN; using bit to indicate down regulation or up regulation to send downlink data rate to the RN;
the granularity of the downlink rate adjustment request comprises: all downlink data based on the RN; or downlink data of any logical channel based on the RN; or based on downlink data of any UE under the RN; or downlink data of any RB of any UE under the RN.
When the RN sends a downlink rate adjustment request to the DeNB, the downlink rate adjustment request carries a duration length indication; the indication of the length of duration specifically comprises one or more of the following:
the duration length is a time length in milliseconds; or
The duration length is a numerical value taking a wireless frame as a unit; or
The duration length is a numerical value in units of subframes; or
The duration length is a numerical value taking a backhaul subframe as a unit; or
The duration length is the absolute system frame number L.
Wherein the adjusting, by the DeNB according to the downlink rate adjustment request, downlink data scheduling and transmission on a backhaul link includes:
the DeNB adjusts the downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request, and the method comprises the following steps: the DeNB suspends or resumes sending downlink data to the RN or the DeNB adjusts or adjusts downwards the sending downlink data rate to the RN according to the downlink rate adjustment request; or
The DeNB adjusts the number of the downlink backhaul subframes according to the downlink rate adjustment request; the method specifically comprises the following steps: when the DeNB judges that the downlink data volume of the return link is lower than the data volume of the access link for a long time according to the long-term statistics and the algorithm design reported by the RN, the DeNB increases the number of the return subframes of the downlink; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, the DeNB reduces the number of downlink backhaul subframes.
The embodiment of the invention provides a method for controlling backhaul link flow, which comprises the following steps:
a DeNB receives a downlink rate adjustment request sent by an RN when the RN judges that a downlink data traffic measurement result meets a preset trigger condition;
the DeNB adjusts the downlink data scheduling and transmission on the backhaul link according to the downlink rate adjustment request; wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval.
Wherein the adjusting, by the DeNB according to the downlink rate adjustment request, downlink data scheduling and transmission on a backhaul link includes:
the DeNB adjusts the downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request, and the method comprises the following steps: the DeNB suspends or resumes sending downlink data to the RN or the DeNB adjusts or adjusts downwards the sending downlink data rate to the RN according to the downlink rate adjustment request; or
The DeNB adjusts the number of the downlink backhaul subframes according to the downlink rate adjustment request; the method specifically comprises the following steps: when the DeNB judges that the downlink data volume of the return link is lower than the data volume of the access link for a long time according to the long-term statistics and the algorithm design reported by the RN, the DeNB increases the number of the return subframes of the downlink; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, the DeNB reduces the number of downlink backhaul subframes.
Before the DeNB receives the downlink rate adjustment request sent by the RN, the method includes:
and the RN judges that the downlink data traffic measurement result meets a preset trigger condition, and sends a downlink rate adjustment request to the DeNB.
An embodiment of the present invention provides a system for controlling backhaul link flow, including:
the RN is used for acquiring a downlink data traffic measurement result; judging whether the downlink data traffic volume measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request; when the downlink data traffic volume measurement result is judged to meet the preset triggering condition, sending a downlink rate adjustment request to the DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB;
the DeNB is used for receiving a downlink rate adjustment request sent by the RN; according to the downlink rate adjustment request, adjusting downlink data scheduling and transmission on a backhaul link; wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval.
An embodiment of the present invention provides an RN, including:
the acquisition module is used for acquiring a downlink data traffic volume measurement result;
a judging module, configured to judge whether the measurement result of the downlink data traffic volume obtained by the obtaining module meets a preset trigger condition, where the trigger condition is used to trigger sending of a downlink rate adjustment request;
the processing module is used for sending a downlink rate adjustment request to the DeNB when the judging module judges that the downlink data traffic volume measurement result obtained by the obtaining module meets the preset triggering condition, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB; wherein, the judging module is specifically configured to: judging whether the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or judging that the downlink data traffic volume measurement result meets the preset trigger condition within a preset time length; or judging that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval.
Wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or the logical channel of the RN has packet loss caused by Discard _ Timer timeout; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
Wherein the processing module is specifically configured to:
sending a request for suspending or resuming sending downlink data to the RN to the DeNB; or
And sending a request for adjusting up or down to send a downlink data rate to the RN to the DeNB.
Wherein,
the processing module is further configured to: reporting through an RRC layer; or reporting through an MAC layer;
the processing module is further configured to: using a bit to indicate to pause or resume sending downlink data to the RN; using bit to indicate down regulation or up regulation to send downlink data rate to the RN;
the granularity of the downlink rate adjustment request comprises: all downlink data based on the RN; or downlink data of any logical channel based on the RN; or based on downlink data of any UE under the RN; or downlink data of any RB of any UE under the RN.
Wherein the processing module is further configured to: carrying a duration length indication in the downlink rate adjustment request; the indication of the length of duration specifically comprises one or more of the following:
the duration length is a time length in milliseconds; or
The duration length is a numerical value taking a wireless frame as a unit; or
The duration length is a numerical value in units of subframes; or
The duration length is a numerical value taking a backhaul subframe as a unit; or
The duration length is the absolute system frame number L.
An embodiment of the present invention provides a DeNB, including:
the receiving module is used for receiving a downlink rate adjustment request sent by the RN when the RN judges that the downlink data traffic measurement result meets a preset trigger condition;
an adjusting module, configured to adjust downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request received by the receiving module; wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval.
Wherein the adjusting module is specifically configured to:
adjusting downlink data scheduling and transmission of the RN and macro UE according to the downlink rate adjustment request received by the receiving module, including: according to the downlink rate adjustment request, suspending or resuming the transmission of downlink data to the RN or adjusting the transmission rate of the downlink data to the RN up or down; or
Adjusting the number of downlink backhaul subframes according to the downlink rate adjustment request received by the receiving module; the method specifically comprises the following steps: when the quantity of the return link downlink data is judged to be lower than that of the access link data for a long time according to long-term statistics and algorithm design reported by the RN, the number of the return link return subframes is increased; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, reducing the number of downlink backhaul subframes.
The embodiment of the invention sends the downlink rate adjustment request through the RN and adjusts the downlink rate according to the request by the DeNB, thereby avoiding the data traffic mismatching of the return link and the access link, and further solving the problems of RN downlink data congestion or R-UE downlink data delay and resource waste on the return link.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings used in the description of the present invention or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LTE-a system with Relay in the prior art;
fig. 2 is a flowchart of a backhaul link flow control method according to an embodiment of the present invention;
fig. 3 is a flowchart of a backhaul link flow control method according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a format of a MAC subheader according to an embodiment of the present invention;
fig. 5 shows a format of a DL flow control CE according to an embodiment of the present invention;
fig. 6 shows a format of a DL flow control CE according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an RN according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a DeNB in an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides that: the RN acquires a downlink data traffic volume measurement result and judges whether the downlink data traffic volume measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request; when the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition, the RN sends a downlink rate adjustment request to the DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a return link according to the downlink rate adjustment request; otherwise, the RN does not send a downlink rate adjustment request to the DeNB.
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
For downlink transmission after the RNs are introduced, the DeNB performs scheduling decision and resource allocation according to the configuration of the backhaul link and the priority condition of data sent to each RN, and transmits the data to the RNs. And each RN performs scheduling decision and resource allocation according to the downlink data received by the RN and transmits the data to each R-UE. For downlink transmission, there is no data flow control method at present. The effects of this are: due to mismatching of the backhaul link and the access link, if the data traffic of the access link is smaller than that of the backhaul link, congestion of downlink data at the RN may be caused, and meanwhile, due to excessive downlink transmission resources of the DeNB used for the backhaul link, the macro UE cannot be well scheduled and transmitted; if the data traffic of the access link is greater than that of the backhaul link, the RN has no downlink data to send, and the DeNB does not send the data late, which may cause unnecessary delay of R-UE data. Particularly, when the R-UE has link degradation or even radio link failure, the DeNB cannot know that the R-UE still transmits downlink data of the UE to the RN, and finally causes the data to be deleted at the RN, which wastes resources on the backhaul link.
An embodiment of the present invention provides a method for controlling backhaul link flow, as shown in fig. 2, which specifically includes the following steps:
step 201, the RN obtains a measurement result of downlink data traffic;
step 202, the RN determines whether the downlink data traffic measurement result meets a preset trigger condition, where the trigger condition is used to trigger sending of a downlink rate adjustment request;
step 203, when the RN determines that the downlink data traffic measurement result meets the preset trigger condition, the RN sends a downlink rate adjustment request to a DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, the RN does not send a downlink rate adjustment request to the DeNB.
An embodiment of the present invention provides a method for controlling backhaul link flow, as shown in fig. 3, specifically including the following steps:
step 301, the RN obtains a measurement result of the downlink data traffic volume.
In order to determine whether the downlink data transmission rate of the backhaul link between the DeNB and the RN needs to be adjusted according to actual conditions, the RN needs to obtain a downlink data traffic measurement result for subsequent determination.
Preferably, the measurement result of the downlink data traffic volume includes: the downlink buffer amount, the packet loss caused by the overtime of the Discard _ Timer of the logic channel of the RN, the UE link under the RN is deteriorated or is good, and the UE under the RN has the measurement results of wireless link failure or successful reconstruction and the like. The buffer amount may be measured based on a real-time value, or may be an average value or an increase amount within a preset time T.
For example: when the RN determines that the downlink data link is congested according to its own downlink data sending and caching condition, that is, a downlink data traffic measurement result, the RN may report to the DeNB that it is required to suspend sending downlink data to the RN or reduce a rate of sending downlink data to the RN; when the RN determines that the downlink data link congestion is eliminated according to the own downlink data caching condition, the RN may report a request to the DeNB to resume downlink data transmission to the RN or to increase the downlink data transmission rate to the RN.
Step 302, the RN determines whether a preset trigger condition is met according to the measurement result of the downlink data traffic volume.
Specifically, the RN determines whether the preset trigger condition is met according to the measurement result of the downlink data traffic volume, where the preset trigger condition includes any one of the following two conditions:
(a) when the judgment result is that the preset trigger condition is met, turning to step 303;
(b) and when the judgment result is that the preset trigger condition is not met, turning to step 301.
The preset trigger conditions include: a down rate trigger condition or an up rate trigger condition. The downward rate triggering condition is used for triggering the RN to send a request for downward regulating to send a downlink data rate to the RN to the DeNB, wherein the downward rate can be as low as the data sending is suspended; the up-regulation rate triggering condition is used for triggering the RN to send a request for up-regulating the downlink data rate sent to the RN to the DeNB, wherein the request for resuming the downlink data sending to the RN is sent to the DeNB after the DeNB suspends the downlink data sending to the RN.
Preferably, the down-rate triggering condition comprises one or more of:
the RN detects that the downlink cache amount is higher than a cache threshold A or the increase amount of the downlink cache amount in a preset time T is higher than a cache increase threshold B; and/or the logical channel of the RN has packet loss caused by the timeout of the Discard _ Timer; and/or UE link degradation under RN; and/or a radio link failure occurs for the UE under the RN.
Preferably, the ramp-up rate trigger condition comprises one or more of:
the RN detects that the downlink buffer amount is lower than a buffer threshold C or the reduction amount of the downlink buffer amount in a preset time T is higher than a buffer reduction threshold D, and can be used in cooperation with a previously reported down-regulation rate adjustment request or used independently; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
Preferably, the trigger condition for downward rate adjustment may be a current time point when the buffer amount is higher than the buffer threshold a, for example: reporting when the buffer storage amount is changed from a value smaller than A to a critical point larger than A, namely, the RN judges that the measurement result of the downlink data traffic volume meets a preset trigger condition at any time point; time _ to _ trigger time T1 can also be set, and the report is performed only when the condition that the buffer memory amount is higher than the buffer threshold A is continuously satisfied after time T1, that is, the RN determines that the downlink data traffic amount measurement result satisfies the preset trigger condition within the preset time length; after reporting, the pending _ time _ to _ trigger duration T2 may also be set, that is, after the request for rate reduction is reported, the request can be triggered or reported again after T2 time, that is, the RN determines that the downlink data traffic volume measurement result meets the preset trigger condition after the preset trigger time interval. The up rate trigger is similar to the down rate trigger and will not be described here.
Preferably, the downlink data traffic volume measurement result and the trigger condition may be configured by RRC (radio resource Control).
Step 303, the RN sends a downlink rate adjustment request to the DeNB.
Preferably, the sending, by the RN, the downlink rate adjustment request to the DeNB includes:
(a) when the downlink rate adjustment request is triggered by a rate reduction triggering condition, the RN sends a request for reducing the downlink data rate to the RN to the DeNB;
(b) when the downlink rate adjustment request is triggered by an uplink rate triggering condition, the RN sends a request for uplink data rate transmission to the RN to the DeNB.
Preferably, when the RN sends the downlink rate adjustment request to the DeNB, the RN may carry a duration length indication, and at this time, the DeNB adjusts to send downlink data to the RN according to the request only within the indicated duration. Wherein the manner of duration length indication includes any one of the following manners:
a. the duration length is duration m in milliseconds, at this time, the DeNB starts to pause sending downlink data to the RN from receiving the downlink rate adjustment request, and the duration is m milliseconds;
b. the duration length is a numerical value N taking a radio frame as a unit, at the moment, the DeNB starts to pause the transmission of downlink data to the RN from the time when receiving the downlink rate adjustment request, and the duration length is N radio frames;
c. the duration length is a numerical value N taking a subframe as a unit, at the moment, the DeNB starts to pause the transmission of downlink data to the RN from the time when receiving the downlink rate adjustment request, and the duration length is N subframes;
d. the duration length is a numerical value N taking backhaul subframes as units, at this time, the DeNB starts to pause sending downlink data to the RN from receiving a downlink rate adjustment request, and the duration length is N backhaul subframes;
e. the duration length is the absolute system frame number L, at which time the DeNB starts to pause sending downlink data to the RN from the time when receiving the downlink rate adjustment request until the radio frame with the system frame number L ends.
Of course, the downlink rate adjustment request may not carry the duration indication, and at this time, the DeNB sends downlink data to the RN according to the request when receiving the downlink rate adjustment request until receiving the next downlink rate adjustment request sent by the RN to the DeNB.
When the RN sends a downlink rate adjustment request to the DeNB, the reported granularity comprises any one of the following:
(a) the RN sends a downlink rate adjustment request to the DeNB, and all downlink data based on the RN are sent;
(b) the RN sends downlink data of any logic channel based on the RN to the DeNB for downlink rate adjustment request;
(c) the RN sends a downlink rate adjustment request to the DeNB, wherein the downlink rate adjustment request is based on downlink data of any UE under the RN;
(d) and the RN sends downlink data of any RB of any UE under the RN to the DeNB for requesting the downlink rate adjustment.
Preferably, a bit is used for indicating to suspend or resume the sending of the downlink data to the RN; and using a bit to indicate the downward regulation or the upward regulation to send the downward data rate to the RN. Specifically, a format of 1bit indicating that the RN transmits the downlink rate adjustment request to the DeNB is shown in table 1, where "0" indicates to resume transmitting the downlink data to the RN, and "1" indicates to suspend transmitting the downlink data to the RN.
TABLE 1, 1bit indication
0 Recovery
1 Pausing
Preferably, a format of indicating that the RN transmits the downlink rate adjustment request to the DeNB by using 2 bits is shown in table 2, where "00" indicates that the speed of transmitting the downlink data to the RN is not limited, "01" indicates that the speed of transmitting the downlink data to the RN is reduced, "10" indicates that the speed of transmitting the downlink data to the RN is increased, and "11" indicates that the transmission of the downlink data to the RN is stopped.
TABLE 2, 2bit indication
00 Without limitation
01 Speed reduction
10 Acceleration of the vessel
11 Stop sending out completely
Preferably, the method for the RN to send the downlink rate adjustment request to the DeNB includes: reporting by an RRC layer; or Media Access Control (MAC) layer.
The reporting mode of the RRC layer specifically comprises the following steps: measuring a downlink data traffic volume measurement result by the MAC layer; the MAC layer reports the downlink data traffic volume measurement result to the RRC after judging that the downlink data traffic volume measurement result meets a preset trigger condition; and the RRC layer three-layer report is sent to the DeNB. Compared with the mode of reporting by the MAC layer, the RRC layer reporting mode can carry more information (for example, a traffic measurement value, etc., and the mode of reporting by the MAC layer is better to indicate a rise or a fall with a small number of bits), and has higher stability.
The reporting mode of the MAC layer specifically comprises the following steps: measuring a downlink data traffic volume measurement result by the MAC layer; and after judging that the downlink data traffic volume measurement result meets the preset trigger condition, the MAC layer reports the downlink data traffic volume measurement result to the DeNB by utilizing the downlink rate adjustment request carried in the MACPDU.
The MAC layer reporting format comprises any one of the following two modes:
(a) a new MAC CE (MAC Control Element) is introduced to carry the downlink rate adjustment request, and the MAC CE is called DL flow Control CE.
When the RN reports the downlink rate adjustment request, the DL flow control CE is placed in an MAC PDU (MAC Packet Data Unit), wherein the MAC PDU comprises two parts of the DL flow control CE and an MAC subheader corresponding to the DL flow control CE.
The format of the MAC subheader is shown in fig. 4, where the MAC subheader is R/E/LCID sub-header, where: LCID (logical Channel id) is used to identify the logical Channel number of the corresponding payload portion, and a special LCID is used to indicate the MAC CE, where it is used to identify the subheader and the corresponding payload portion for rate adjustment; e is an extension bit for indicating whether the next byte is a MAC subheader or a MAC payload; r is a reserved bit, where a downlink rate adjustment request may be indicated with a 1-2bit reserved bit in a format similar to that of table 1 or table 2.
When the MAC PDU does not carry the DL flow control CE, it indicates that the downlink rate adjustment request granularity is based on the downlink data of the entire RN, and the specific downlink rate adjustment request is interpreted by the rabit according to the format of table 1 or table 2.
When the MAC PDU carries DL flow control CE, it is preferable to use 1-2bytes to indicate one or more of the duration length corresponding to the downlink rate adjustment request, the identification information of the specific UE, and the logical channel number of the RN, such as UE ID. When carrying the duration length indication information, the specific format is as shown in fig. 5; when the UE identifies information, the specific format is as shown in fig. 6; when the logical channel number of the RN is carried, the specific format is similar to that of fig. 5 and 6, and is not described herein again.
Preferably, in the case that the required duration length indication information or the UE identification information has remaining bits, an indication of a downlink rate adjustment request similar to table 1 or table 2 may be placed in the DL flowcontrol CE information, so that the MAC subheader format maintains compatibility.
(b) The MAC subheader of the data portion is used to carry the downlink rate adjustment request with its extreme extension.
In the MAC subheader of the normal data, the extension of R bit indicates that the downlink rate adjustment indication is carried for the logical channel. The R bit may be used to directly represent the downlink rate adjustment information as shown in table 1 or table 2, and may also carry duration length indication information and/or UE identity information subsequently; or, the R bit may be used to indicate that downlink rate adjustment information is carried, and downlink rate adjustment information shown in table 1 or table 2 is carried in the duration length indication information or the UE identity information. The method can be used to indicate downlink rate adjustment for a specific logical channel of the RN or rate adjustment for a certain RB of a specific UE in the RN.
And step 304, the DeNB adjusts the downlink data scheduling and transmission on the backhaul link according to the downlink rate adjustment request.
Preferably, adjusting downlink data scheduling and transmission on the backhaul link includes either:
(a) the DeNB adjusts the downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request;
specifically, the DeNB may adjust downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request, where the adjustment includes any one of the following situations:
(1) when the downlink rate adjustment request is a request for suspending the transmission of downlink data to the RN, the DeNB completely suspends the scheduling and the transmission of the downlink data according to the granularity indicated by the report, and caches the data which are suspended to be transmitted;
(2) when the downlink rate adjustment request is a request for recovering the downlink data sent to the RN, the DeNB recovers to participate in normal scheduling and transmission of the specified downlink data according to the granularity specified by the report;
(3) when the downlink rate adjustment request is a request for reducing the downlink data rate sent to the RN, the DeNB determines according to the load and the scheduling algorithm of the DeNB, and slows down the scheduling and transmission of the indicated downlink data, for example, normally schedules all gbr (guaranteed Bit rate) services without reducing the rate; for all NGBR (Non-guarde Bit Rate) services, reducing the Rate to half of the normal scheduling Rate or only maintaining a smaller Rate, and the like;
(4) when the downlink rate adjustment request is a request for up-regulating the downlink data rate sent to the RN, the DeNB may release the limitation on the specified downlink data scheduling or increase the previously limited rate of the NGBR service by 10% or increase the previously limited smaller rate by some.
(b) And the DeNB adjusts the number of DL backhaul (downlink backhaul) subframes according to the downlink rate adjustment request, wherein the DL backhaul subframes are specially used for downlink scheduling and transmission of the RN by the DeNB.
The method for adjusting the number of the DL backhaul subframes by the DeNB according to the downlink rate adjustment request specifically includes:
when the DeNB judges that the downlink data volume of the return link is lower than the data volume of the access link for a long time according to the long-term statistics and the algorithm design reported by the RN, the DeNB increases the number of DL backhaul subframes;
and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, the DeNB reduces the number of DLbackhaul subframes.
An embodiment of the present invention provides a system for controlling backhaul link flow, including:
the RN is used for acquiring a downlink data traffic measurement result; judging whether the downlink data traffic volume measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request; when the downlink data traffic volume measurement result is judged to meet the preset triggering condition, sending a downlink rate adjustment request to the DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB.
The DeNB is used for receiving a downlink rate adjustment request sent by the RN; and adjusting the downlink data scheduling and transmission on the backhaul link according to the downlink rate adjustment request.
An embodiment of the present invention provides an RN700, as shown in fig. 7, including:
an obtaining module 710, configured to obtain a measurement result of downlink data traffic;
a determining module 720, configured to determine whether the measurement result of the downlink data traffic volume obtained by the obtaining module 710 meets a preset trigger condition, where the trigger condition is used to trigger sending of a downlink rate adjustment request;
a processing module 730, configured to send a downlink rate adjustment request to the DeNB when the determining module 720 determines that the measurement result of the downlink data traffic volume obtained by the obtaining module 710 meets the preset trigger condition, so that the DeNB adjusts scheduling and transmission of downlink data on the backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB.
The determining module 720 is specifically configured to: judging whether the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or judging that the downlink data traffic volume measurement result meets the preset trigger condition within a preset time length; or judging that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval; the preset trigger conditions include:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or the logical channel of the RN has packet loss caused by Discard _ Timer timeout; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
The processing module 730 is specifically configured to:
sending a request for suspending or resuming sending downlink data to the RN to the DeNB; or
And sending a request for adjusting up or down to send a downlink data rate to the RN to the DeNB.
Wherein,
the processing module 730 is further configured to: reporting through an RRC layer; or reporting through an MAC layer;
the processing module 730 is further configured to: using a bit to indicate to pause or resume sending downlink data to the RN; using bit to indicate down regulation or up regulation to send downlink data rate to the RN;
the granularity of the downlink rate adjustment request comprises: all downlink data based on the RN; or downlink data of any logical channel based on the RN; or based on downlink data of any UE under the RN; or downlink data of any RB of any UE under the RN.
Wherein the processing module 730 is further configured to: carrying a duration length indication in the downlink rate adjustment request; the indication of the length of duration specifically comprises one or more of the following:
the duration length is a time length in milliseconds; or
The duration length is a numerical value taking a wireless frame as a unit; or
The duration length is a numerical value in units of subframes; or
The duration length is a numerical value taking a backhaul subframe as a unit; or
The duration length is the absolute system frame number L.
An embodiment of the present invention provides a DeNB800, as shown in fig. 8, including:
a receiving module 810, configured to receive a downlink rate adjustment request sent by an RN;
an adjusting module 820, configured to adjust downlink data scheduling and transmission on the backhaul link according to the downlink rate adjustment request received by the receiving module 810.
The adjusting module 820 is specifically configured to:
adjusting downlink data scheduling and transmission of the RN and macro UE according to the downlink rate adjustment request received by the receiving module 810 includes: according to the downlink rate adjustment request, suspending or resuming the transmission of downlink data to the RN or adjusting the transmission rate of the downlink data to the RN up or down; or
Adjusting the number of downlink backhaul subframes according to the downlink rate adjustment request received by the receiving module 810; the method specifically comprises the following steps: when the quantity of the return link downlink data is judged to be lower than that of the access link data for a long time according to long-term statistics and algorithm design reported by the RN, the number of the return link return subframes is increased; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, reducing the number of downlink backhaul subframes.
The embodiment of the invention sends the downlink rate adjustment request through the RN and adjusts the downlink rate according to the request by the DeNB, thereby avoiding the data traffic mismatching of the return link and the access link, and further solving the problems of RN downlink data congestion or R-UE downlink data delay and resource waste on the return link.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for enabling a terminal device (which may be a mobile phone, a personal computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.

Claims (15)

1. A method of backhaul link flow control, comprising:
a relay node RN acquires a downlink data traffic volume measurement result;
the RN judges whether the downlink data traffic measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request;
when the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition, the RN sends a downlink rate adjustment request to a donor base station DeNB (donor evolved node B), so that the DeNB adjusts downlink data scheduling and transmission on a return link according to the downlink rate adjustment request; otherwise, the RN does not send a downlink rate adjustment request to the DeNB;
wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval;
wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or a packet loss of a logical channel of the RN caused by the overtime of Discard _ Timer; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
2. The method of claim 1, wherein the RN sending a downlink rate adjustment request to the DeNB comprises:
the RN sends a request for suspending or resuming sending downlink data to the RN to the DeNB; or
And the RN sends a request for adjusting up or down to send a downlink data rate to the RN to the DeNB.
3. The method of claim 1, wherein when the RN sends a downlink rate adjustment request to the DeNB,
the sending mode comprises the following steps: reporting through an RRC layer; or reporting through an MAC layer;
the transmission format includes: using a bit to indicate to pause or resume sending downlink data to the RN; using bit to indicate down regulation or up regulation to send downlink data rate to the RN;
the granularity of the downlink rate adjustment request comprises: all downlink data based on the RN; or downlink data of any logical channel based on the RN; or based on downlink data of any UE under the RN; or downlink data of any RB of any UE under the RN.
4. The method of claim 1 or 2, wherein when the RN sends a downlink rate adjustment request to a DeNB, the downlink rate adjustment request carries a duration length indication; the indication of the length of duration specifically comprises one or more of the following:
the duration length is a time length in milliseconds; or
The duration length is a numerical value taking a wireless frame as a unit; or
The duration length is a numerical value in units of subframes; or
The duration length is a numerical value taking a backhaul subframe as a unit; or
The duration length is the absolute system frame number L.
5. The method of claim 1, wherein the DeNB adjusting downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request comprises:
the DeNB adjusts the downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request, and the method comprises the following steps: the DeNB suspends or resumes sending downlink data to the RN or the DeNB adjusts or adjusts downwards the sending downlink data rate to the RN according to the downlink rate adjustment request; or
The DeNB adjusts the number of the downlink backhaul subframes according to the downlink rate adjustment request; the method specifically comprises the following steps: when the DeNB judges that the downlink data volume of the return link is lower than the data volume of the access link for a long time according to the long-term statistics and the algorithm design reported by the RN, the DeNB increases the number of the return subframes of the downlink; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, the DeNB reduces the number of downlink backhaul subframes.
6. A method of backhaul link flow control, comprising:
a DeNB receives a downlink rate adjustment request sent by an RN when the RN judges that a downlink data traffic measurement result meets a preset trigger condition;
the DeNB adjusts the downlink data scheduling and transmission on the backhaul link according to the downlink rate adjustment request;
wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval;
wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or a packet loss of a logical channel of the RN caused by the overtime of Discard _ Timer; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
7. The method of claim 6, wherein the DeNB adjusting downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request comprises:
the DeNB adjusts the downlink data scheduling and transmission of the RN and the macro UE according to the downlink rate adjustment request, and the method comprises the following steps: the DeNB suspends or resumes sending downlink data to the RN or the DeNB adjusts or adjusts downwards the sending downlink data rate to the RN according to the downlink rate adjustment request; or the DeNB adjusts the number of the downlink backhaul subframes according to the downlink rate adjustment request; the method specifically comprises the following steps: when the DeNB judges that the downlink data volume of the return link is lower than the data volume of the access link for a long time according to the long-term statistics and the algorithm design reported by the RN, the DeNB increases the number of the return subframes of the downlink; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, the DeNB reduces the number of downlink backhaul subframes.
8. The method of claim 7, wherein before the DeNB receives the downlink rate adjustment request sent by the RN, the method comprises:
and the RN judges that the downlink data traffic measurement result meets a preset trigger condition, and sends a downlink rate adjustment request to the DeNB.
9. A system for backhaul link flow control, comprising:
the RN is used for acquiring a downlink data traffic measurement result; judging whether the downlink data traffic volume measurement result meets a preset trigger condition, wherein the trigger condition is used for triggering and sending a downlink rate adjustment request; when the downlink data traffic volume measurement result is judged to meet the preset triggering condition, sending a downlink rate adjustment request to the DeNB, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB; the DeNB is used for receiving a downlink rate adjustment request sent by the RN; according to the downlink rate adjustment request, adjusting downlink data scheduling and transmission on a backhaul link; wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval;
wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or a packet loss of a logical channel of the RN caused by the overtime of Discard _ Timer; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
10. An RN, comprising:
the acquisition module is used for acquiring a downlink data traffic volume measurement result;
a judging module, configured to judge whether the measurement result of the downlink data traffic volume obtained by the obtaining module meets a preset trigger condition, where the trigger condition is used to trigger sending of a downlink rate adjustment request;
the processing module is used for sending a downlink rate adjustment request to the DeNB when the judging module judges that the downlink data traffic volume measurement result obtained by the obtaining module meets the preset triggering condition, so that the DeNB adjusts downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request; otherwise, not sending a downlink rate adjustment request to the DeNB; the determining module is specifically configured to enable the downlink data traffic volume measurement result to meet the preset trigger condition at any time point; or judging that the downlink data traffic volume measurement result meets the preset trigger condition within a preset time length; or judging that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval;
wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or the logical channel of the RN has packet loss caused by Discard _ Timer timeout; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
11. The RN of claim 10, wherein the processing module is specifically configured to:
sending a request for suspending or resuming sending downlink data to the RN to the DeNB; or
And sending a request for adjusting up or down to send a downlink data rate to the RN to the DeNB.
12. The RN of claim 10 or 11,
the processing module is further configured to: reporting through an RRC layer; or reporting through an MAC layer;
the processing module is further configured to: using a bit to indicate to pause or resume sending downlink data to the RN; using bit to indicate down regulation or up regulation to send downlink data rate to the RN;
the granularity of the downlink rate adjustment request comprises: all downlink data based on the RN; or downlink data of any logical channel based on the RN; or based on downlink data of any UE under the RN; or downlink data of any RB of any UE under the RN.
13. The RN of claim 10 or 11, wherein the processing module is further configured to: carrying a duration length indication in the downlink rate adjustment request; the indication of the length of duration specifically comprises one or more of the following:
the duration length is a time length in milliseconds; or
The duration length is a numerical value taking a wireless frame as a unit; or
The duration length is a numerical value in units of subframes; or
The duration length is a numerical value taking a backhaul subframe as a unit; or
The duration length is the absolute system frame number L.
14. A DeNB, comprising:
the receiving module is used for receiving a downlink rate adjustment request sent by the RN when the RN judges that the downlink data traffic measurement result meets a preset trigger condition;
an adjusting module, configured to adjust downlink data scheduling and transmission on a backhaul link according to the downlink rate adjustment request received by the receiving module;
wherein the determining, by the RN, that the downlink data traffic volume measurement result satisfies the preset trigger condition includes: the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition at any time point; or the RN judges that the downlink data traffic measurement result meets the preset trigger condition within a preset time length; or the RN judges that the downlink data traffic volume measurement result meets the preset trigger condition after a preset trigger time interval;
wherein the preset trigger condition comprises:
the downlink cache amount of the RN is higher than a cache threshold or the increase of the downlink cache amount in a preset time is higher than a cache increase threshold; and/or a packet loss of a logical channel of the RN caused by the overtime of Discard _ Timer; and/or a UE link degradation under the RN; and/or the UE under the RN has radio link failure; or
The downlink buffer amount of the RN is lower than a buffer threshold or the reduction of the downlink buffer amount in a preset time is higher than a buffer reduction threshold; and/or link improvement of the UE under the RN; and/or the UE radio link under the RN is successfully reestablished.
15. The DeNB of claim 14, wherein the adjustment module is specifically configured to:
adjusting downlink data scheduling and transmission of the RN and macro UE according to the downlink rate adjustment request received by the receiving module, including: according to the downlink rate adjustment request, suspending or resuming the transmission of downlink data to the RN or adjusting the transmission rate of the downlink data to the RN up or down; or
Adjusting the number of downlink backhaul subframes according to the downlink rate adjustment request received by the receiving module; the method specifically comprises the following steps: when the quantity of the return link downlink data is judged to be lower than that of the access link data for a long time according to long-term statistics and algorithm design reported by the RN, the number of the return link return subframes is increased; and when the downlink data volume of the backhaul link is higher than the data volume of the access link for a long time, reducing the number of downlink backhaul subframes.
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Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130235724A1 (en) * 2012-03-09 2013-09-12 Sevis Systems, Inc. System and Method for Optimizing and Eliminating Congestion for WAN Interfaces within the Access Domain
US10187822B2 (en) * 2013-07-10 2019-01-22 Kt Corporation Method and apparatus for transmitting data in wireless LAN system
CN104604287B (en) 2013-08-30 2019-04-23 华为技术有限公司 A kind of control method and device of wireless communication network data transmission
CN104981026B (en) * 2014-04-04 2019-02-19 华为技术有限公司 A kind of backhaul link method of adjustment, mobile node and system
CN107634783B (en) * 2015-11-28 2019-06-25 Oppo广东移动通信有限公司 The carrier aggregation mode setting method and communication terminal and medium product of communication terminal
US10708854B2 (en) 2017-10-12 2020-07-07 Airspan Networks Inc. Apparatus and method for providing network configurability in a wireless network
US11102785B2 (en) 2017-10-12 2021-08-24 Airspan Ip Holdco Llc Apparatus and method selecting a base station in a network
US10616824B2 (en) * 2017-11-03 2020-04-07 Airspan Networks Inc. Apparatus and method for providing network configurability in a wireless network
CN110366206A (en) 2018-03-26 2019-10-22 华为技术有限公司 A kind of information transferring method and device
WO2019204992A1 (en) 2018-04-24 2019-10-31 北京小米移动软件有限公司 Wireless backhaul connection method and device
CN110856222B (en) * 2018-08-20 2022-06-28 华为技术有限公司 Flow control method and device
WO2020097883A1 (en) * 2018-11-15 2020-05-22 北京小米移动软件有限公司 Method and device for message transmission
CN111586803B (en) * 2019-02-15 2021-09-07 华为技术有限公司 Communication method and related equipment
CN109951398B (en) * 2019-03-22 2021-09-17 腾讯科技（深圳）有限公司 Data sending method and device and computer equipment
CN110611620B (en) * 2019-09-29 2021-11-05 新华三信息安全技术有限公司 Link updating method and device
CN111566985B (en) * 2020-04-16 2023-09-19 北京小米移动软件有限公司 Transmission processing method, device, user equipment, base station and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101521624A (en) * 2008-02-26 2009-09-02 大唐移动通信设备有限公司 Method and device for distributing downlink bandwidth of lub port
CN101969669A (en) * 2009-07-27 2011-02-09 大唐移动通信设备有限公司 Method, system and device for adjusting data volume

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101521624A (en) * 2008-02-26 2009-09-02 大唐移动通信设备有限公司 Method and device for distributing downlink bandwidth of lub port
CN101969669A (en) * 2009-07-27 2011-02-09 大唐移动通信设备有限公司 Method, system and device for adjusting data volume

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