CN102474896B - The apparatus and method controlled for downlink traffic in mobile terminal, relay station and relay management equipment - Google Patents
The apparatus and method controlled for downlink traffic in mobile terminal, relay station and relay management equipment Download PDFInfo
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- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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Abstract
A kind of new be particularly suited for wireless relay network in order to avoid and to eliminate congested flow control plan, wherein, when relay station (RN) (2) finds namely to will appear from congested on the interface between it and relay management equipment (eNB) (3), can initiate to require the request of reduction downlink transmission data rate to eNB (3). In addition, when mobile terminal (UE) (1) namely will appear from congested on the interface found between oneself and RN (2), similar mode can also be adopted to inform RN (2), and data rate when suitably being adjusted to UE (1) transmission data by RN (2). In addition, when RN (2) receives from the request of the requirement reduction data transfer rate of UE (1), it is also possible to determine whether to voluntarily reduce the downlink transmission data rate between eNB (3) and RN (2) to eNB (3) request further.
Description
Technical field
The present invention relates to the flow-control in wireless relay network, particularly for base station, relay station, mobile terminal and method thereof that the downlink traffic in wireless relay network controls.
Background technology
TCP utilizes sliding window mechanism, supports flow-control end to end. The window of TCP is adjusted in units of byte, to adapt to the disposal ability of recipient. In each TCP block, receiving terminal indicates it in reception window territory and receives window size, in order to avoid transmitting terminal transmission is too fast causes that receiving terminal overflows, or because receiving terminal processes wastes resource too soon.
TCP uses substantial amounts of mechanism obtain high reliability simultaneously and avoid congestion collapse. These mechanism controls enter the data rate of network, and they include: sliding window, slowstart algorithm, congestion avoidance algorithm, quickly restart and fast restoration algorithm. For the detailed content of TCP congestion control, see RFC2001, RFC2018, RFC2581, RFC2582, RFC2883 standard.
At the wireless network not introducing relaying, based on above-mentioned TCP scheme, complete flow-control end to end and congestion control mechanism. But, it can only work at source equipment and destination equipment.
With in network standard that the follow-up evolution of LTE (LTE-Advanced calls LTEA in the following text), IEEE802.16m are example, relaying is considered to improve systematic function, it is provided that a possible key technology of arranging net flexibly. In the standardisation process of LTEA, I class relaying as base station in general sense, will have the physical district ID (physicalcellID) of oneself, it means that they are invisible to mobile terminal unlike transparent relay.
Fig. 1 is the schematic diagram of a typical junction network, for the purpose of simple and clear, illustrate only 1, relay station (hereinafter also referred to RN) 2 of a mobile terminal (hereinafter also referred to UE) and a relay management equipment (hereinafter also referred to eNB) 3. Wherein, the interface between mobile terminal 1 and relay station 2 is shown as Uu, and the interface between relay station 2 and relay management equipment 3 is shown as Un.
In the junction network shown in Fig. 1, relay station 2 by from relay management equipment 3 data buffer storage relaying down buffer storage in, for downward forwarding. But, the data transfer rate if from relay management equipment 3 is significantly high, and when occurring congested between relay station 2 and mobile terminal 1, the relaying down buffer storage of relay station 2 is gradually filled with and overflows, and new downlink data is because cannot process in time, and is abandoned by relay station 2.
In addition, relay management equipment 3 does not know mobile terminal 1 place reception situation to the downlink data from relay station 2 yet, therefore, even if the user equipment downlink buffer memory of mobile terminal 1 occurs in that spilling, the data pointing to this mobile terminal 1 still continuously can be sent to relay station 2 by relay management equipment 3. Relay station 2 or constantly these data are transmitted to mobile terminal 1 but are abandoned by mobile terminal 1, or the relaying down buffer storage of relay station 2 is gradually filled with and overflows, and therefore wastes wireless transmission resources, too increases the burden of the network equipment.
As can be seen here, wireless relay network needs a kind of special downlink traffic control mechanism.
Summary of the invention
In order to solve the problems referred to above of the prior art, the invention provides a kind of new be particularly suited for wireless relay network by avoid and eliminate congested for the purpose of flow control plan, wherein, when relay station finds namely to will appear from congested on the interface between it and relay management equipment, can initiate to require the request of reduction downlink transmission data rate to relay management equipment. Additionally, when namely mobile terminal will appear from congested on the interface found between oneself and relay station, it would however also be possible to employ similar mode informs relay station data transfer rate when suitably being adjusted to this terminal transmission data by relay station. Additionally, when relay station is received from the request of the requirement reduction data transfer rate of mobile terminal, it is also possible to determine whether to voluntarily reduce the downlink transmission data rate between relay management equipment and this relay station to relay management device request further. These and the further feature of the present invention, advantage can pass through discussed below become relatively sharp.
According to an aspect of the present invention, provide the stream control auxiliary device for assisting downlink traffic to control in a kind of mobile terminal in wireless relay network, including: the first judgment means, whether the residual capacity being used for judging in the user equipment downlink buffer memory of described mobile terminal is less than or equal to first capacity threshold; First generates device, if for the residual capacity in described user equipment downlink buffer memory less than or equal to described first capacity threshold, then generating a first reduced speed request message, it reduces the downlink transmission data rate between this relay station and described mobile terminal for the relay station request mobile terminal affiliated to this; First dispensing device, for being sent to described relay station by described first reduced speed request message.
According to a further aspect in the invention, it is provided that a kind of first control device being used for carrying out downlink traffic control in relay station, including: the second judgment means, it is used for judging whether predetermined condition meets; Second generates device, for when described predetermined condition meets, generating a second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to the relay management device request belonging to this relay station; Second dispensing device, for being sent to this relay management equipment by this second reduced speed request message.
Preferably, above-mentioned first control device also comprises determining that device, for when described second judgment means judges that described predetermined condition meets, this relay station determining at least one mobile terminal in each mobile terminal serviced; Described second generates device is additionally operable to :-generating described second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate being associated with at least one mobile terminal described between this relay management equipment with this relay station to described relay management device request.
According to can one of a lot of examples of phase trans-substitution, this second judgment means is used for: judge that whether the residual capacity in the relaying down buffer storage of this relay station is less than or equal to second capacity threshold, if the residual capacity in the relaying down buffer storage of this relay station is less than or equal to this second capacity threshold, then judge that this predetermined condition meets.
According to can one of a lot of examples of phase trans-substitution, this second judgment means is used for: judge whether to receive the first reduced speed request message that one or more mobile terminal is sent, wherein every first reduced speed request message is for asking this relay station to reduce the downlink transmission data rate between this relay station and corresponding mobile terminal, if receiving the described first reduced speed request message that one or more mobile terminal is sent, then judge that this predetermined condition meets.
Further, this first judgment means is additionally operable to: if receiving the described first reduced speed request message that one or more mobile terminal is sent, then determine whether that whether the residual capacity of relaying down buffer storage of this relay station is less than or equal to the 3rd capacity threshold, if the residual capacity of the relaying down buffer storage of this relay station is less than or equal to described 3rd capacity threshold, then judge that this predetermined condition meets.
Preferably, this determine device for: the one or more mobile terminal is defined as at least one mobile terminal described.
According to another aspect of the invention, provide in a kind of relay management equipment in wireless relay network for carrying out the second control device of downlink traffic control, including: receive device, for receiving the second reduced speed request message from a relay station, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to this relay management device request; Process device, for based on described second reduced speed request message, reducing the downlink transmission data rate between this relay management equipment and this relay station.
Preferably, second reduced speed request message indicates at least one mobile terminal in each mobile terminal that this relay station services, above-mentioned process device is additionally based upon described second reduced speed request message, reduces the downlink transmission data rate being associated with this at least one mobile terminal between this relay management equipment with this relay station.
According to a further aspect in the invention, provide a kind of method for assisting downlink traffic to control in mobile terminal in wireless relay network, comprise the following steps: A. judges that whether the residual capacity in the user equipment downlink buffer memory of described mobile terminal is less than or equal to first capacity threshold; If B. the residual capacity in described user equipment downlink buffer memory is less than or equal to described first capacity threshold, then generating a first reduced speed request message, it reduces the downlink transmission data rate between this relay station and described mobile terminal for the relay station request mobile terminal affiliated to this; C. described first reduced speed request message is sent to described relay station.
According to another aspect of the invention, it is provided that a kind of method in relay station for carrying out downlink traffic control, comprise the following steps: I. and judge whether predetermined condition meets; III. when described predetermined condition meets, generating a second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to the relay management device request belonging to this relay station; IV. this second reduced speed request message is sent to this relay management equipment.
Preferably, also include after step I and before step III: II. when described predetermined condition meets, this relay station determines at least one mobile terminal in each mobile terminal serviced; Described step III also includes: generate described second reduced speed request message, and this second reduced speed request message is for reducing the downlink transmission data rate being associated with at least one mobile terminal described between this relay management equipment with this relay station to described relay management device request.
According to multiple can one of alternative embodiment mutually, above-mentioned steps I includes: 11. judge that residual capacity in the relaying down buffer storage of this relay station is whether less than or equal to second capacity threshold or receive the first reduced speed request message that one or more mobile terminal is sent; If 12. the residual capacity in the relaying down buffer storage of this relay station is less than or equal to this second capacity threshold, or receiving the first reduced speed request message sent from one or more mobile terminals, then judge that this predetermined condition meets.
Further, this step 11 also includes: if receiving the first reduced speed request message that one or more mobile terminal is sent, relay station determines whether that whether the residual capacity of the relaying down buffer storage of this relay station is less than or equal to the 3rd capacity threshold, if the residual capacity of the relaying down buffer storage of this relay station is less than or equal to described 3rd capacity threshold, then judge that this predetermined condition meets.
According to another aspect of the invention, provide a kind of method for carrying out downlink traffic control in relay management equipment in wireless relay network, comprising the following steps: O. receives the second reduced speed request message from a relay station, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to this relay management device request; P. based on described second reduced speed request message, the downlink transmission data rate between this relay management equipment and this relay station is reduced.
Preferably, wherein, described second reduced speed request message indicates at least one mobile terminal in each mobile terminal that this relay station services; Described step P also includes: based on described second reduced speed request message, reduce the downlink transmission data rate being associated with this at least one mobile terminal between this relay management equipment with this relay station.
Scheme provided by the invention is capable of the resource utilization optimized, and reduces the possibility of TCP slow turn-on, and minimizes the time delay of RTT. At least one embodiment of the present invention can also realize the downlink traffic in wireless relay system with less granularity and signaling consumption and control. At least one embodiment of the present invention is owing to having reused the design of MAC layer, and reduces the introducing present invention impact on existing equipment, system to the full extent. In addition, in at least one embodiment of the present invention, relay management equipment is that those face the resource that congested mobile terminal distribution is extremely limited, wouldn't be even its Resources allocation, so, realize smaller particle size flow-control, avoid the wasting of resources while, ensure that the use to resource of other terminal, it is preferable that distribute to other mobile terminal by the resource these economized out, improve the utilization rate of resource
Accompanying drawing explanation
By reading the detailed description that non-limiting example is made made with reference to the following drawings, the other features, objects and advantages of the present invention will become more apparent upon.
Fig. 1 is the schematic diagram of a wireless relay network;
Fig. 2 be a specific embodiment according to the present invention in wireless relay network for carrying out the system approach flow chart of downlink traffic control;
Fig. 3 be according to a particular embodiment of the invention in flow process shown in Fig. 2 for ask reduce downstream data rate signaling format schematic diagram;
Fig. 4 be according to a particular embodiment of the invention in the flow process shown in Fig. 2 for ask reduce downstream data rate signaling format schematic diagram;
Fig. 5 be a specific embodiment according to the present invention in the mobile terminal of wireless relay network for the stream control auxiliary device block diagram of assisted downlink flow-control;
Fig. 6 be a specific embodiment according to the present invention in relay station for controlling the first control device block diagram of downlink chain circuit data stream amount;
Fig. 7 be a specific embodiment according to the present invention in relay management equipment for controlling the second control device block diagram of downlink chain circuit data stream amount.
Wherein, same or analogous accompanying drawing labelling represents same or analogous steps characteristic or device (module) feature.
Detailed description of the invention
Hereinafter with reference to above-mentioned accompanying drawing, multiple nonlimiting examples of the present invention are described. It will be appreciated by those skilled in the art that these nonlimiting examples are only help and the solution of the present invention is understood, the protection domain of the application is not constituted any restriction, the protection domain of the application is determined by appended claims.
Understand in order to convenient, and clearly explain the scope of the claims of the application, some herein presented conceptual illustration are as follows:
Congested: when carrying out data transmission, sending the speed that the speed of data and recipient receive and process not is moment Perfect Matchings, on the one hand, when data are less, it is likely to occur sender compartment of terrain and sends data, and recipient except minority time except receiving and processing the data that receive, the most of the time is in idle condition; On the other hand, sender also have transmission data transfer rate relatively large time, now, if the data received can not be digested by recipient in time, so it will gradually rise for the full level of the buffer memory of data pending after temporary reception, and when cache overflow or close to, when overflowing, causing the transmission between sender and recipient no longer so smooth and easy, namely occur congested. Depend on the amount of sender's outgoing data and the disposal ability of recipient, this congested be usually temporary transient, but if can not get good process, above-mentioned variety of problems certainly will be caused.
RLC state is reported: in ARQ mechanism, this kind of message refers to ACK and the NACK message in ARQ mechanism, represent whether the data to wherein institute's labelling are correctly received respectively, usually, when receiving ACK message, follow-up new data will be sent to recipient by sender, if receiving NACK message, then the data wherein indicated are retransmitted.
Relay management equipment: herein, relay management equipment refers to the such network equipment being connected to relay station network side, it can receive, via the wireless backhaul links of relay station, the upstream data that this relay station is sent, it is also possible to sends downlink data via downlink to this relay station. It realizes the function of the base station of (such as in WiMAX network) in general sense. Owing to this kind equipment is referred to as E-UTRANNodeB in LTEA, therefore with " relay management equipment ", two aspects are summarized herein.
Relaying down buffer storage: relaying down buffer storage refers to for the downlink data received is carried out buffer memory in relay station, for the buffer memory forwarded subsequently, it is also possible to be called the relay station buffer memory in user side.
User equipment downlink buffer memory: user equipment downlink buffer memory refers in the terminal for the downlink data received is carried out buffer memory, the buffer memory such as play for follow-up process, stored.
In the following description to nonlimiting examples, for ease of understanding, all in conjunction with each network equipment shown in Fig. 1. Fig. 2 illustrate a specific embodiment according to the present invention in wireless relay network for carrying out the system approach flow chart of the flow-control on downlink.
Method shown in it starts from step S20, and wherein relay station 2 judges whether predetermined condition meets. Wherein, the embodiment according to Fig. 2, relay station 2 will judge that when following condition meets this predetermined condition meets:
Condition 1: the capacity in the relaying down buffer storage of relay station 2 is less than second capacity threshold. For judging for condition 1, its residual capacity relaying down buffer storage should be monitored by relay station 2, and the residual capacity real-time monitored and second capacity threshold is compared. Should be appreciated that relay station 2 can be presented as the amount in units of bit or byte for buffer memory residual capacity and the second capacity threshold compared, for instance, to the relaying down buffer storage being always sized to 64Kbytes, arranging its second capacity threshold is 8Kbytes; On the other hand, relay station 2 can also be presented as a ratio value for the buffer memory residual capacity compared with the second capacity threshold, such as, second capacity threshold is set when being 25%, if the relaying down buffer storage of relay station 2 be occupied 75% or more than, step S20 then will obtain the judged result of affirmative, namely judge that predetermined condition meets.
For ensureing fluency herein, for other condition being discussed in step S20, will do again after this example is to flow process introduction shown in Fig. 2 and launch.
It is to be understood that, other implementation can also be had based on the above-mentioned judgement of residual capacity and the second capacity threshold, such as, by determining the capacity being occupied in buffer memory in units of bit or byte, and itself and a threshold value in units of bit or byte are compared, when occupying capacity more than this threshold value, be then equivalent to buffer memory and tending to full. This manner of comparison is suitable with the above-mentioned manner of comparison based on residual capacity and the second capacity threshold, it should is understood as and is covered by above-mentioned manner of comparison. Additionally, can also carry out in the way of ratio value partly as in the way of monitoring and judging object by what already take up.
Advantageously, in this example, owing to relay station 2 just triggers flow-control operation when relaying down buffer storage and the trend overflowed occur, it is to avoid what overflow actually occurs, thus be more beneficial for the Optimum utilization of resource.
When predetermined condition meets, the method enters step S21, wherein, relay station 2 generates a second reduced speed request message, and this second reduced speed request message can have various ways, such as, by defining the message with brand new format, and realize by the sending and receiving end of this message is configured, or, defining a kind of message with typical format, latter approach is conducive to reducing the present invention impact on existing equipment, system.
Multiple according to above-mentioned second reduced speed request message can in alternative example mutually, what generate in step S21 is a RRC signaling, it is referred to as relay capabilities message (RNcapabilitytransfermessage) herein, it is similar in RRC signaling existing terminal capability message (UEcapabilitytransfermessage), in the territory of in the message " RN-category " by name, designate the ability to accept to downstream signal of relay station 2, this ability can be represented by the cache size of the size of maximum transmitted block (transportblock) and layer two (MAC/RLC layer). if continuing to use the form of existing UE capabilities message, in RN-category territory, corresponding value has 5 kinds, distinguishes correspondence 5 class RN, and the ability to accept of the downstream signal from relay management equipment is successively decreased by it.
This RRC signaling concrete is in this example as the application of the second reduced speed request message, when relay station 2 can generate this message in the step s 21, the value of RN-category is adjusted to and indicates than before a more less ability to accept grade, thus showing to relay management equipment 3, the type of relay station 2 is altered, please adjust descending data rate.
In step S22, the second reduced speed request message of generation i.e. this RN capabilities message is sent to relay management equipment 3. Correspondingly, relay management equipment 3 is after receiving this RN capabilities message, can by the parsing of the content to RN-category, recognize the relay station 2 actual speed that can deal with now, it is easier to the speed dealt with in other words conj.or perhaps, then, the QoS characteristic according to radio bearer, the transfer rate on corresponding radio bearer (radiobearer) during for sending downlink data to relay station 2 can be adjusted immediately. Such as, under the premise of the downlink data rate upper limit that relay station type indicated in less than this RN-category can bear, continue to send downlink data to this relay station with an as far as possible high data transfer rate.
Second reduced speed request message of above-mentioned RRC signaling type is while realizing controlling with the downlink traffic of relay station report triggering conditions voluntarily, continue to use original message format, have certain effect for reducing the impact on system, but, owing to the reduction of downstream data rate only will be expected to do to represent by the message format that adopts by several classifications, therefore granularity is bigger, in addition, depend on the build-in attribute of RRC signaling self, RRC information is adopted to carry out the signaling consumption that flow-control can bring very important, additionally, the delay problem of RRC signaling also merits attention.
According to another in multiple embodiments that can mutually replace of this second reduced speed request message, the second reduced speed request message generated in step S20 is the message of a MAC layer, as shown in Figure 3. Compared with RRC signaling, the time delay of MAC message, signaling consumption are all more satisfactory. It is described in detail herein below.
In MAC message, MACPDU attached bag head part can comprise the Logic Channel Identifier corresponding with this message, and its effect is similar to the Type territory in some message, plays the mark action of the type to message, function. Such Logic Channel Identifier is embodied in attached bag head with the form of index such that it is able to represent more information with less data volume, specifically as shown in table 1:
Logic Channel Identifier index in table 1:MAC message
From table 1, the index of 01011 the second reduced speed request message being used as in this example in the original reserved 01011-11001 of utilization without loss of generality.
As the load of this request message, the rate reduction factor (ratereductionfactor) is for showing a new downstream data rate desired by relay station 2 to relay management equipment 3, and its concrete form includes but not limited to shown in table 2:
Table 2: the index of the rate reduction factor
By the second reduced speed request message in this example as above, a desired new downstream data rate can be informed relay management equipment 3 by relay station 2, wherein, each speed shown in table 2 reduces the ratio that the size of the new transmission block of factor representation should be preferably the maximum transmitted block of this relay station, such as, when speed reduce the factor with index 0111 represent time, namely show the downlink data transmission between relay control equipment 3 and the relay station 2 that the most multipotency support of relay station 2 carries out with the transmission block of 70% size of maximum transmitted block.
Then, in this embodiment, the request that relay management equipment 3 is sent in step S22 based on relay station 2, the size of transmission block when adjusting for sending downlink data to relay station 2 in step s 30.
Consider that each mobile terminal has miscellaneous service type, preferably, flow control plan proposed in the present invention acts only on the business of NGBR (not guaranteed rate) type, and for the business of GBR (guaranteed rate) type, for guaranteed rate, not reduction. But, this preference is understood not to the present invention and under any circumstance all cannot be used for reducing the downlink transmission rate of GBR type service. Hereinafter for describing simplicity, do not repartition the type (NGBR or GBR) of downlink business (data).
In two examples told about hereinbefore, relay station 2 all makes relay management equipment 3 integrally reduce all downlink datas being sent to this relay station to the second reduced speed request message that relay management equipment 3 sends, and each mobile terminal that these downlink datas this relay station that has been actually corresponding services, this also implies that, even if it is owing to the problem at one or two mobile terminal place causes that the congested buffer memory in other words at relay station 2 place tends to full, the downstream data rate of all mobile terminals that relay station 2 still can be serviced by relay station management equipment 3 lowers, and this possibility will make other mobile terminals cannot obtain descending data with maximization and suitable speed.
Consider this point, present invention further propose that, after relay station 2 obtains the judged result of affirmative in the situation of the relaying down buffer storage based on self in step S20, at least one mobile terminal (this step not shown) is determined from each mobile terminal that it is servicing, then the identification information of at least one mobile terminal determined is embodied in the MAC message generated in the step s 21, and for these mobile terminals, being referred to table 2 and give a rate reduction factor respectively for it, these factors can be identical, different or part is identical. Importantly, above-mentioned at least one mobile terminal determined should be occur in that congested mobile terminal, is so elected reduction speed targetedly and is only the most rational. In this example, it is congested that relay station 2 determines which mobile terminal occurs in that in such a way, thus causing that its relaying down buffer storage faces spilling.
Typically, relay station 2 selects to be retransmitted those mobile terminals of downlink data as at least one above-mentioned mobile terminal by relay station 2 for it continually within the past period. Such mobile terminal is often the channel circumstance self being in deep fade, or the user equipment downlink buffer memory of self occurs in that spilling. Relay station 2 determines that the reference privacy of this at least one mobile terminal also includes the state relaying down buffer storage of relay station 2 and the ability (maximum transport block size and layer two cache size etc.) of each mobile terminal and the report of RLC state, HARQ feedback report etc.
By such mode, relay station 2 can reduce, to management device request, the downstream data rate being associated with part mobile terminal more targetedly, the MAC message used is as shown in Figure 4, wherein, the identification information of mobile terminal is used to represent the corresponding rate reduction factor is for which mobile terminal. It is, of course, preferable to ground, relay management equipment 3 step S30 thereafter will mainly reduce the downstream data rate of the NGBR type service being associated with at least one mobile terminal described. Additionally, according to the different network architectures, being likely under some network architecture relay management equipment 3 is capable of identify that each mobile terminal that relay station 2 services, therefore, such scheme initiating request to relay management equipment 3 for concrete mobile terminal is more suitable for such network architecture, wherein, relay management equipment 3 is capable of identify which business the mobile terminal that relay station 2 services all is using. It is exactly generally speaking: when relay management equipment 3 can distinguish the mobile terminal under relay station 2 that relay station can inform that relay management equipment reduces the speed of wherein certain terminal; Otherwise, relay station is only capable of the speed of all terminals informing that relay management equipment reduces its service.
In example described above, describe in detail with the criterion that relay station 2 is used as in step S20 according to condition 1, below, referring again to another implementation of step S20. Wherein, when condition 2 is satisfied, relay station 2 can also be judged to that predetermined condition is satisfied, and this condition 2 is exactly: receive the first reduced speed request message from one or more mobile terminals. Certainly, one or more mobile terminal mentioned here is all serviced by this relay station 2.
According to this example, it is similar to the above-mentioned judgement that relay station 2 carries out with regard to its relaying down buffer storage, mobile terminal 1 is with regard to the situation of its user equipment downlink buffer memory, make the following judgment: judge that whether the residual capacity in the user equipment downlink buffer memory of mobile terminal 1 is less than or equal to first capacity threshold, particular content about this judgement, it is essentially identical with the comparison procedure above in connection with relaying down buffer storage and the second capacity threshold, repeats no more. When residual capacity is less than or equal to the first capacity threshold, mobile terminal 1 will generate a first reduced speed request message, and this message is used for reducing the downlink transmission data rate between this relay station and this mobile terminal 1 to relay station 2 request,
For mobile terminal 1, the first reduced speed request message that it generates can be and the second same kind of message of reduced speed request message presented hereinabove, the UE capabilities message in RRC, or the MAC message shown in Fig. 3.
Similarly, the UE-category territory in UE capabilities message can be used for roughly indicating a new downlink transmission rate to relay station 2, and the rate reduction factor in MAC message then can be done to represent to relay station 2 with less granularity.
Relay station 2 is after receiving the first reduced speed request message that one or more mobile terminal is sent, no matter himself relaying down buffer storage can be in which kind of situation (free time or tend to full), all generate a second reduced speed request message as above, issue the data rate of relay station 2 thereby through reduction relay management equipment 3, indirectly reduce relay station 2 and mail to the data rate of mobile terminal. Wherein, relay station 2 can only to the transfer rate of all downlink datas between relay management equipment 3 request reduction and this relay station 2 based on the second reduced speed request message of the request initiation of mobile terminal, certainly, this mode is preferred not, although not occurring congested because being wherein likely to have part mobile terminal, the speed of its downlink data has also suffered from involving. Then, preferably, when relay station 2 generates the second reduced speed request message in the step s 21, specially these one or more mobile terminals having sent the first reduced speed request message are defined as at least one above-mentioned mobile terminal, this at least one mobile terminal will in being asserted the second reduced speed request message generated in the step s 21, as shown in Figure 4, so that reduction of speed has more specific aim.
On the basis of condition 2, further change can be made, namely, relay station 2 and not simply only in decide that after receiving the first reduced speed request message predetermined condition meet, but do further judgement, for instance, it is judged that whether the residual capacity of its relaying down buffer storage is less than or equal to the 3rd capacity threshold, this comparison procedure is referred to above that the second capacity threshold is relevant description, repeats no more. Should be appreciated that aforesaid second capacity threshold and the 3rd capacity threshold can be the same or different, according to the present invention specific embodiment, for same relay station, the second capacity threshold is less than or equal to the 3rd capacity threshold.
Each embodiment according to the present invention, the anxiety considering the buffer memory at relay station or mobile terminal place is often temporary transient, supplementing as such scheme, the mobile terminal of request reduction downlink transmission rate or relay station also can initiate the request of a rate recovery making to be lowered before in due course, this request is typically such as shown in Fig. 3 or 4, and, corresponding value is higher than in the second rate reduction request message sent before for the value of speed therein " reduction " factor, it is achieved thereby that the recovery of speed. Alternatively, above-mentioned recovery process can also be not needed upon asking to realize, such as, relay management equipment 3 (relay station 2) is after the request based on relay station 2 (mobile terminal 1) reduces downlink transmission rate, after the time through a predetermined length, automatically the speed being lowered progressively gently is recovered.
A specific embodiment according to the present invention, it is provided that be used for the stream control auxiliary device assisting downlink traffic to control in a kind of mobile terminal in wireless relay network, as it is shown in figure 5, this stream control auxiliary device 10 includes:
First judgment means 100, whether the residual capacity being used for judging in the user equipment downlink buffer memory of mobile terminal (as shown in Figure 1 mobile terminal 1) is less than or equal to first capacity threshold;
First generates device 101, if for the residual capacity in user equipment downlink buffer memory less than or equal to described first capacity threshold, then generating a first reduced speed request message, it is for asking to reduce the downlink transmission data rate between this relay station and described mobile terminal to the relay station 2 belonging to this mobile terminal 1;
First dispensing device 102, for being sent to described relay station 2 by described first reduced speed request message.
A specific embodiment according to the present invention, it is provided that a kind of first control device being used for carrying out downlink traffic control in relay station, as shown in Figure 6, this first control device 20 includes:
Second judgment means 200, is used for judging whether predetermined condition meets;
Second generates device 201, for when described predetermined condition meets, generating a second reduced speed request message, this second reduced speed request message is for asking to reduce the downlink transmission data rate between this relay management equipment and this relay station to the relay management equipment 3 belonging to this relay station 2;
Second dispensing device 202, for being sent to this relay management equipment 3 by this second reduced speed request message.
Preferably, this first control device 20 also comprises determining that device 203, for when described second judgment means 200 judges that described predetermined condition meets, this relay station 2 determining at least one mobile terminal in each mobile terminal serviced;
Described second generates device 201 is additionally operable to: generating described second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate being associated with at least one mobile terminal described between this relay management equipment with this relay station to described relay management device request.
Preferably, the second judgment means 20 in this first control device 20 is used for: judge that whether the residual capacity in the relaying down buffer storage of this relay station 2 is less than or equal to second capacity threshold, if the residual capacity in the relaying down buffer storage of this relay station 2 is less than or equal to this second capacity threshold, then judge that this predetermined condition meets.
Preferably, this second judgment means 200 is additionally operable to: judge whether to receive the first reduced speed request message that one or more mobile terminal is sent, wherein every first reduced speed request message is for asking this relay station to reduce the downlink transmission data rate between this relay station and corresponding mobile terminal, if receiving the described first reduced speed request message that one or more mobile terminal is sent, then judge that this predetermined condition meets.
Preferably, second judgment means 200 is additionally operable to: if receiving the described first reduced speed request message that one or more mobile terminal is sent, then determine whether that whether the residual capacity of relaying down buffer storage of this relay station is less than or equal to the 3rd capacity threshold, if the residual capacity of the relaying down buffer storage of this relay station is less than or equal to described 3rd capacity threshold, then judge that this predetermined condition meets.
Preferably, this determine device 203 for: the one or more mobile terminal is defined as at least one mobile terminal described.
According to still another embodiment of the invention, it is provided that for carrying out the second control device of downlink traffic control in a kind of relay management equipment in wireless relay network, as it is shown in fig. 7, this second control device 30 including:
Receiving device 300, for receiving the second reduced speed request message from a relay station 2, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to the request of this relay management equipment 3;
Process device 301, for based on described second reduced speed request message, reducing the downlink transmission data rate between this relay management equipment and this relay station.
Preferably, this second reduced speed request message indicates at least one mobile terminal in each mobile terminal that this relay station 2 services; This process device 301 is additionally operable to: based on described second reduced speed request message, reduce the downlink transmission data rate being associated with this at least one mobile terminal between this relay management equipment with this relay station.
Above specific embodiments of the invention are described. It is to be appreciated that the invention is not limited in above-mentioned particular implementation, those skilled in the art can make various deformation or amendment within the scope of the appended claims.
Claims (12)
1. for carrying out a first control device for downlink traffic control in relay station, including:
Second judgment means, is used for judging whether predetermined condition meets;
Second generates device, for when described predetermined condition meets, generating a second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to the relay management device request belonging to this relay station;
Second dispensing device, for being sent to this relay management equipment by this second reduced speed request message;
Wherein, described second judgment means is used for:
-judge whether to receive the first reduced speed request message that one or more mobile terminal is sent, wherein every first reduced speed request message is for asking this relay station to reduce the downlink transmission data rate between this relay station and corresponding mobile terminal, if receiving the described first reduced speed request message that one or more mobile terminal is sent, then judge that this predetermined condition meets.
2. first control device according to claim 1, wherein, also includes:
Determine device, for when described second judgment means judges that described predetermined condition meets, this relay station each mobile terminal serviced determining at least one mobile terminal;
Described second generates device is additionally operable to:
-generating described second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate being associated with at least one mobile terminal described between this relay management equipment with this relay station to described relay management device request.
3. first control device according to claim 2, wherein, described second judgment means is used for:
-judge that the residual capacity in the relaying down buffer storage of this relay station is whether less than or equal to second capacity threshold, if the residual capacity in the relaying down buffer storage of this relay station is less than or equal to this second capacity threshold, then judges that this predetermined condition meets.
4. first control device according to claim 1, wherein, described second judgment means is additionally operable to:
If-receive the described first reduced speed request message that one or more mobile terminal is sent, then determine whether that whether the residual capacity of relaying down buffer storage of this relay station is less than or equal to the 3rd capacity threshold, if the residual capacity of the relaying down buffer storage of this relay station is less than or equal to described 3rd capacity threshold, then judge that this predetermined condition meets.
5. first control device according to claim 2, wherein, described determine device for:
-the one or more mobile terminal is defined as at least one mobile terminal described.
6. for carrying out a second control device for downlink traffic control in the relay management equipment in wireless relay network, including:
Receive device, for receiving the second reduced speed request message from a relay station, this the second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to this relay management device request, wherein, the first reduced speed request message that this second reduced speed request message is this relay station to be sent in response to the one or more mobile terminals received and send, every first reduced speed request message is for asking this relay station to reduce the downlink transmission data rate between this relay station and corresponding mobile terminal;
Process device, for based on described second reduced speed request message, reducing the downlink transmission data rate between this relay management equipment and this relay station.
7. second control device according to claim 6, wherein, described second reduced speed request message indicates at least one mobile terminal in each mobile terminal that this relay station services;
Described process device is additionally operable to:
-based on described second reduced speed request message, reduce the downlink transmission data rate being associated with this at least one mobile terminal between this relay management equipment with this relay station.
8. the method being used for carrying out downlink traffic control in relay station, comprises the following steps:
I. judge whether predetermined condition meets;
III. when described predetermined condition meets, generating a second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to the relay management device request belonging to this relay station;
IV. this second reduced speed request message is sent to this relay management equipment;
Wherein, described step I includes:
I1. judging to receive the first reduced speed request message that one or more mobile terminal is sent, this first reduced speed request message reduces the downlink transmission data rate between this relay station and corresponding mobile terminal for asking this relay station;
If I2. receiving the first reduced speed request message sent from one or more mobile terminals, then judge that this predetermined condition meets.
9. method according to claim 8, wherein, also includes after described step I and before described step III:
II. when described predetermined condition meets, this relay station each mobile terminal serviced determines at least one mobile terminal;
Described step III also includes:
-generating described second reduced speed request message, this second reduced speed request message is for reducing the downlink transmission data rate being associated with at least one mobile terminal described between this relay management equipment with this relay station to described relay management device request.
10. method according to claim 9, wherein, described step I includes:
I1. judge that whether the residual capacity in the relaying down buffer storage of this relay station is less than or equal to second capacity threshold;
If I2. the residual capacity in the relaying down buffer storage of this relay station is less than or equal to this second capacity threshold, then judge that this predetermined condition meets.
11. the method being used in the relay management equipment in wireless relay network carrying out downlink traffic control, comprise the following steps:
O. the second reduced speed request message from a relay station is received, this the second reduced speed request message is for reducing the downlink transmission data rate between this relay management equipment and this relay station to this relay management device request, wherein, the first reduced speed request message that this second reduced speed request message is this relay station to be sent in response to the one or more mobile terminals received and send, every first reduced speed request message is for asking this relay station to reduce the downlink transmission data rate between this relay station and corresponding mobile terminal;
P. based on described second reduced speed request message, this relay management equipment and this relay station are reduced
Between downlink transmission data rate.
12. method according to claim 11, wherein, described second reduced speed request message indicates at least one mobile terminal in each mobile terminal that this relay station services;
Described step P also includes:
-based on described second reduced speed request message, reduce the downlink transmission data rate being associated with this at least one mobile terminal between this relay management equipment with this relay station.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2009/073286 WO2011020228A1 (en) | 2009-08-17 | 2009-08-17 | Device and method for controlling downlink flow in user equipment, relay node and evolved universal terrestrial radio access network nodeb |
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| CN102474896A CN102474896A (en) | 2012-05-23 |
| CN102474896B true CN102474896B (en) | 2016-06-01 |
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| WO (1) | WO2011020228A1 (en) |
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| 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 |
| CN112218339B (en) * | 2020-09-30 | 2023-03-14 | 三维通信股份有限公司 | Relay transmission scheduling method, device, storage medium and electronic equipment |
| CN118233003B (en) * | 2024-05-27 | 2024-07-23 | 微网优联科技(成都)有限公司 | System and method for monitoring rate of optical network access equipment |
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| US7106696B1 (en) * | 2001-08-31 | 2006-09-12 | Juniper Networks, Inc. | Systems and methods for limiting the rates of data to/from a buffer |
| CN1333605C (en) * | 2003-08-22 | 2007-08-22 | 华为技术有限公司 | Method for controlling service transmitting speed ratio of 3G mobile communication system |
| JP2006279612A (en) * | 2005-03-29 | 2006-10-12 | Ntt Docomo Inc | Transmission speed control method, mobile station and radio circuit control station |
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| CN1337130A (en) * | 1999-01-15 | 2002-02-20 | 诺基亚网络有限公司 | Flow control method in telecommunications system |
| US7447774B2 (en) * | 2002-08-27 | 2008-11-04 | Cisco Technology, Inc. | Load balancing network access requests |
| CN1866783A (en) * | 2005-05-18 | 2006-11-22 | 大唐移动通信设备有限公司 | Channel rate adjusting method for packet data service of general mobile communication system |
| CN101253729A (en) * | 2005-10-11 | 2008-08-27 | 思科技术公司 | Methods and devices for backward congestion notification |
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| CN102474896A (en) | 2012-05-23 |
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