CN1819673A - Base-station-controlled time-division plexing scheduling method with data transmission enhancing concerned - Google Patents
Base-station-controlled time-division plexing scheduling method with data transmission enhancing concerned Download PDFInfo
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Abstract
A data transmission strengthens the related base station controlling time-sharing multiplying dispatch method. The Node B of the invention ensure some user's equipment of the area data with the current height separation the according to the UE uploading height information, transmit the user's equipment on the different time intervals and control the transmit speed of the user's data by the attemper, realize the time-sharing multiplying height of the base station control. The invention realize to attemper the data operation transmission of the plot UE by the time-sharing mode, base on the user's need and the channel condition, confirm the user that can transmit on each time interval, and attemper the user's transmit speed to realize the data operation transmission of the plot UE, decrease the noise adding variance of the system, avoid the overload of the system, thus enhances the upward plot throughput of the system, increases the service cover of the system.
Description
Technical field
The present invention relates to the dispatching method of base station (Node B) control of TDD mobile communication system transfer of data enhancing, particularly, the schedule information that Node B uploads according to the user, determine the user that to transmit data at interval in current scheduling, and these users are specified on the different time slots transmission respectively and its transmission rate is controlled, realize control to data traffic transmission in the sub-district.
Background technology
Third generation partner plan (The 3rd Generation Partnership Project is called for short 3GPP) is a technology standardization tissue of implementing 3-G (Generation Three mobile communication system), and wherein the 3G (Third Generation) Moblie technical standard comprises Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) pattern.3GPP is from setting up so far, respectively at having announced the Frequency Division Duplexing (FDD) (FDD) that mainly comprises 3.84Mcps and the 3-G (Generation Three mobile communication system) technical standard of time division duplex (TDD) in October, 1999, is called for short Release 99; Announce the 3-G (Generation Three mobile communication system) technical standard of the time division duplex (LCR-TDD) of the Frequency Division Duplexing (FDD) (FDD), time division duplex (TDD) and the 1.28Mcps that mainly comprise 3.84Mcps in 2000 again, be called for short Release 4; And announced again that in calendar year 2001 the interpolation high-speed data packets inserts (HSDPA) in the 3-G (Generation Three mobile communication system) technical standard of the time division duplex (LCR-TDD) of Frequency Division Duplexing (FDD) (FDD), time division duplex (TDD) and the 1.28Mcps of 3.84Mcps, is called for short Release 5.At present, 3GPP is implementing the technology beforehand research of the 3-G (Generation Three mobile communication system) up link enhancing (Uplink Enhancement) of time division duplex (TDD), and the technology standardization work that up link strengthens (Uplink Enhancement) will be formally studied in expection on the basis of the technology beforehand research that above-mentioned up link is strengthened (Uplink Enhancement), the technical scheme that is produced will be contained in the 3-G (Generation Three mobile communication system) technical standard of following time division duplex (TDD), be called for short Release 6.
The up enhancement techniques of the Frequency Division Duplexing (FDD) (FDD) in the 3-G (Generation Three mobile communication system) no matter, still the up link of time division duplex (TDD) strengthens the technology of (Uplink Enhancement), its purpose all is by to implemented the coverage that effectively management and planning improve the wireless area of the capacity of up link of said system and said system by the uplink transmission resource of the wireless network that 3-G (Generation Three mobile communication system) constituted of Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD), so that be suitable for the stronger data service of transmitting burst; In addition, by improving the performance of uplink dedicated transmission channel, thereby improve the coverage rate and the throughput of sub-district, improve uplink speed, reduce uplink delay.
The discussion that third generation partner plan strengthens about up channel at first is Frequency Division Duplexing (FDD) (FDD) beginning from 3.84Mcps, and in June, 2003,20 meetings of RAN agree to begin one's study up channel of time division duplex (being called for short TDD) system strengthens.The main project of research comprises the scheduling of base station (NodeB) control, the request retransmission of mixing (being called for short HARQ) etc.Dispatching method about base station (Node B) control, at fdd mode, 3GPP TR 25.896V0.4.2 has comprised two kinds of main methods: a kind of is the rate scheduling method (also being two threshold scheme) of base station (Node B) control, and another kind is the speed and the time scheduling method of base station (Node B) control.
In the rate scheduling scheme of first kind of base stations control, each subscriber equipment is in the initialization procedure of dedicated transmission channel, and base station controller (RNC) distributes a transmission format composite set (being called for short TFCS) and two TFC threshold values for each UE.This TFCS has comprised multiple transmission rate.In two threshold values, one is the threshold value of UE, and another is the threshold value of Node B, and the threshold value of UE must not be greater than the threshold value of Node B.In communication process, UE can select transformat combination (TFC) with limitation in the given TFCS of RNC, that is to say that the TFC of selection must not be greater than current UE threshold value.If the TFC that UE uses equals current UE threshold value, and UE thinks when also having a ability (as: current transmit power is much smaller than specified maximum transmission power) with higher rate transmission UE having the demand that improves transmission rate simultaneously, can improve the UE threshold value to Node B request, whether Node B allows UE to improve the threshold value of UE according to current noise situation decision.If allow UE to improve threshold value, the threshold value of UE can not surpass the threshold value of Node B.Concrete process is as follows:
The up signaling of physical layer is called speed application (being called for short RR), is specifically designed to the UE application and changes current UE threshold value.When UE wished to improve current UE threshold value, just UE wished with higher rate sending data, and the value of RR is made as " Up ", when UE does not wish to change current UE threshold value, did not send RR.When the UE selection sends with little data rate, can directly use less TFC to get final product.
There is the downlink signaling of physical layer to be called speed simultaneously and replys (being called for short RG), be specifically designed to the speed application of UE is replied.When the value of RG is " Up ", illustrate that Node B agrees that UE increases its UE threshold value.When UE proposes speed application (promptly sending RR=" Up "), and Node B illustrate that Node B disagrees with UE increase UE threshold value when not replying (promptly not sending RG).When the value of RG is " Down ", illustrate that Node B requires this UE to reduce its UE threshold value.
In the time and rate scheduling scheme of second kind of base station (Node B) control, UE is before carrying out transfer of data, some information need be issued Node B to carry out the request of transfer of data, Node B is according to the information of receiving, calculate the quality of the wireless channel of UE, and, to whether allowing this UE to transmit, carry out transfer of data etc. with great speed and unify scheduling and arrange according to the situation of the request of current noise situation and other UE.Concrete process is as follows:
The first step: UE the uplink scheduling information control channel in, send the request of transfer of data.The information that sends comprises the state of the data buffer of UE, the power rating of UE and the maximum power capability of UE.
Second step: Node B monitors the length of data queue of each UE report and the information of transmitting power, is selecting the few UE even can be that a UE transmitted in the time period of next dispatching cycle of trying one's best under the condition that sub-district (Cell) noise allows.Node B replys selected UE by descending scheduling specified control channel.Institute's information transmitted comprises: allow transmission time and in the time period, maximum other the schedule information such as transmitting power that allows.The speed that the maximum of UE allows is the noise increase surplus according to Node B, the state of the data buffer of UE, and the power rating of UE and the factors such as maximum power capability of UE calculate.
The 3rd step: the UE that receives communication with dispatch instructions is specifying constantly and in the time period, is pressing specified rate transmissioning data.
Speed and time scheduling method have the specific speed scheduling to control the ability of this sub-district noise level more accurately, that is to say the maximum capacity that can make this sub-district.Its cost is to need the schedule information of transmission and instruct more complicated than simple rate scheduling.
Up to the present, the scheduling scheme of TDD also among research, is not decided.
The dispatching method of two kinds of base stations control among the FDD can be controlled the noise level of this sub-district comparatively exactly, makes the maximum capacity of this sub-district.Following surface analysis once this scheme in the feasibility of TDD system.
At first, two kinds of methods all are by to the scheduling of transport format combination set (TFCS), the scheduling that assignment realizes speed.This is no problem in the FDD system, because in the FDD system, UE is up mainly to distinguish the user according to scrambler, so UE can be according to the TFCS of Node B assignment, and oneself selects employed up spreading code.And for the TDD system, the use of up code word is limited, if distributed some code word for certain UE, other user just can't use these code words so.Like this, in the TDD system, depend on the assignment of TFCS merely, can't realize rate scheduling.If use two above-mentioned methods in the TDD system, except for the TFCS assignment, the assignment that also needs to introduce code word could realize the scheduling of speed.Like this, above-mentioned first method (rate scheduling method) just can't be used, because be assignment when can't realize TFCS and code word by a RG message merely.
Secondly,, realize time and rate scheduling in the TDD system, so also exist the signaling problem that over-burden, because the assignment of code word will bring the burden of signaling if adopt the time and the rate scheduling of FDD system to add the code word assignment.In the HSDPA of TDD system technology, the assignment of descending code word needs 8 bits, and 4 are used to refer to opening code, and 4 are used to refer to end code.But well-known, in the TDD system, descending spreading factor can be 1 and 16, and up spreading factor can for: 1,2,4,8,16.In the TDD system, up code word assignment just needs 10 or 11 bits like this.Therefore, in the TDD system, to use the time of FDD system and rate scheduling to add the code word assignment, just have 10 signaling burdens that bit is extra.Will be subjected to bigger influence for descending service feature like this.
From above-mentioned analysis, as can be seen, the up Enhancement Method in the FDD system is applied to TDD, also have a lot of problems to need to solve.
Summary of the invention
The time division multiplexing dispatching method that the purpose of this invention is to provide a kind of base station (Node B) control of the TDD of being used for mobile communication system transfer of data enhancing.
For achieving the above object, a kind of transfer of data strengthens the time division multiplexing dispatching method of relevant base stations control, comprises step:
A) subscriber equipment sends the scheduling reference information to the base station at a certain time interval;
B) the scheduling reference information uploaded according to each user of base station, and some this locality can reference information, determine the user to transmit data, and available transfer of data time slot is distributed to these users, and the speed or the power of these user data transmission is carried out assignment;
C) base station is to the subscriber equipment sending time slots assignment that can transmit data and speed or power assignment;
D) receive subscriber equipment that time gap allocating and corresponding power or speed adjusts will the time slot of appointment and with the speed of institute's assignment to the base station transmits data;
E) whether correctly the energy merging is carried out to the repeatedly re-transmitting data block that receives in the base station, decode, and differentiate reception;
F) if correctly receive, the base station will send correct the reception to subscriber equipment and reply, and otherwise, send correctly to receive and will reply;
G) if having received correct reception replys, subscriber equipment will send new data block by the transmitted power of new assignment, reply if received incorrect the reception, and subscriber equipment will retransmit former data block by the transmitted power of new assignment.
The present invention utilizes the assignment of time slot to realize the time division multiplexing dispatching method of base stations control.Owing to have only unique user device transmissions data in each time slot of being dispatched, therefore can freely use code word space and need not the distribution of code word, avoided corresponding signaling burden.Owing to adopted time-multiplexed mode, and need not the distribution of code word, make in TDD system base station become possibility the relative speed control of subscriber equipment.Timeslot scheduling combines with absolute or relative speed scheduling, and the noise that can reduce system increases the variance of (Noise Rise), avoids the overload of system, thereby improves the uplink cells throughput of system, and the business of increase system covers.The scope of application of the present invention is wider, both has been applicable to high code check TDD mobile communication system, is applicable to low code check TDD mobile communication system again.
Description of drawings
Fig. 1 is the scheduling process schematic diagram of time division multiplexing base stations control;
Fig. 2 is that the local resource of the time division multiplexing dispatching method of the base stations control that strengthens of transfer of data uses schematic diagram;
Fig. 3 is the time division multiplexing dispatching method embodiment of base stations control.
Embodiment
The present invention proposes a kind of time division multiplexing dispatching method of base station (Node B) control of the TDD of being used for mobile communication system transfer of data enhancing, this method be by Node B to the transfer of data of the subscriber equipment in the sub-district (UE) can with time slot dispatch, to control the transfer of data of each subscriber equipment, realize scheduling to customer equipment data transmission in the sub-district.Specifically, the base station is based on user's demand and the channel condition that is had thereof, the definite user that can on each time slot, transmit, and these users' transmission rate dispatched, to realize the control to the upstream data service transmission of UE in the sub-district, the noise that reduces system increases the variance of (Noise Rise), avoids the overload of system, thereby improve the uplink cells throughput of system, the business that increases system covers.
The time division multiplexing dispatching method of base stations control among the present invention, the basic principle that realizes is that common data service can allow bigger time delay, therefore can realize scheduling by scheduling to available transmission time (being time slot) of each user to this user's transmission rate, that is to say if the transmission time slot of assignment is many so corresponding transmission rate height; And if the transmission time slot of assignment is few, so corresponding transmission rate is low.And, in each time slot, only having unique user device transmissions data, this subscriber equipment will freely use code word space and need not the assignment of base station like this.Like this, promptly realized the time and the rate scheduling of base stations control, the signaling burden of having avoided the code word assignment to be brought again.
Specific implementation step to process of the present invention describes below, as shown in Figure 1.
101, subscriber equipment is gone up to the base station and send the scheduling reference information at a certain time interval, and these information can comprise the power rating of buffer possession state and subscriber equipment.
102, the base station is after receiving schedule information, will handle the schedule information that each UE uploads, and in conjunction with some local informations, increase thresholding as noise added value in each time slot and noise, the maximum transmission power that each UE allowed (this performance number can be passed through the high-level signaling informing base station in the initial access of each UE) as the parameter of scheduling assignment, is dispatched.Such as, can know the transfer of data demand of each UE according to the possession state of buffer; Increase the noise increase restriction that thresholding can be known the disturbed condition in current each time slot and be allowed according to noise added value in current each time slot and noise; The power rating of subscriber equipment can obtain the channel quality of this subscriber equipment; Maximum according to each UE allows transmitted power just can know the power headroom that each UE can also use.The base station just can be distributed the time slot that is used for transfer of data according to certain dispatching algorithm like this, distributes to the subscriber equipment that needs most.The base station can also increase thresholding according to noise added value on current each time slot and noise the transmission rate or the speed of subscriber equipment are carried out relative the adjustment in addition.
103, the base station is adjusted signaling with time gap allocating and corresponding power or speed and is passed to corresponding user equipment.
104, receive subscriber equipment that time gap allocating and corresponding power or speed adjusts will the time slot of appointment and with corresponding speed to the base station transmits data.
105, the base station will be carried out repeatedly retransmission energy and merge after being received data block, then it be decoded, and by Cyclic Redundancy Check, the data block that receives be carried out verification, and whether the judgment data piece correctly receives.
106, receive if the base station is correct, then send correct the reception and reply (ACK) to UE, reply (NAGK) otherwise send incorrect the reception to UE.
107, at UE reception is replied, differentiate, if that receive is ACK, will enters step 104 and send new data block with the transmitted power of new appointment; And if that receive is NACK, so also enters step 104 and former data block is retransmitted by the transmitted power of new appointment.
In above-mentioned scheduling process, each scheduling time at interval in, the base station according to user's business demand, residing channel condition with and power condition information, available transfer of data time slot is distributed, these time slot allocation are given the several users equipment of minority, and unique user device transmissions data can only be arranged in each time slot, thereby realized the time division multiplexing of local resource, its schematic diagram as shown in Figure 2.The method has been utilized the characteristic of data service permission than long time delay, allow each user in the different time periods, transmit data, and each user can both be with bigger rate transmissioning data in the one's own time period, thereby has increased the utilization ratio of system resource effectively.
In addition, owing to have only unique user device transmissions data in each time slot, this user just can freely use code word space like this.This makes the base station become possibility to the relative speed control of subscriber equipment.The base station can utilize less relative speed or power control signaling bit that the up emission rate or the power of subscriber equipment are adjusted, to reduce the variance that system noise increases.So both realize the scheduling of speed and time slot, also reduced required signaling burden greatly.
Embodiment
The present invention proposes a kind of time division multiplexing dispatching method of base station (Node B) control of the TDD of being used for mobile communication system transfer of data enhancing, this method be by Node B to the transfer of data of the subscriber equipment in the sub-district (UE) can with time slot dispatch, to control the transfer of data of each subscriber equipment, realize scheduling to customer equipment data transmission in the sub-district.For the ease of understanding the present invention, provided the embodiment of the time division multiplexing dispatching process of a base stations control that is applicable to LCR TDD system below.
Suppose that the number of time slot that current system can be used for the professional transmission of uplink strengthening data is 3, and the number of users that can dispatch transmitting uplink data in the sub-district is 5.
Each scheduling time at interval in, these 5 subscriber equipmenies all send schedule information to the base station, oneself data buffer is taken situation, and the power condition of oneself are reported to the base station.The base station is according to these schedule informations, judge each user's data transmission demand with and channel condition, and it is good that transmission time slot is distributed to those channel conditions as far as possible, the user that the transfer of data demand is big, certainly the quality requirements (QoS) of business also can also be taken into account, to adapt to some delay requirement higher data business.The channel condition of supposing user 1 and user 2 here better and buffer take bigger, therefore the base station will utilize downlink signaling that available time slot is distributed to user 1 and user 2, some adjustment also can be done to the transmitting power or the transmission rate of subscriber equipment in the base station in the time of this external distribution time slot, to guarantee that being no more than noise increases thresholding.After user 1 and user 2 have received time gap allocating and velocity allocating, will be according to the time slot of appointment and the rate transmissioning data of appointment, and other do not receive that the user of time gap allocating will continue the channel of monitoring transmission downlink signaling, and report oneself buffer and power condition, up to the time gap allocating that oneself is arranged, and then the transmission data.
Like this, different users has different time gap allocatings, the user that the assignment time slot is more, and the message transmission rate of its corresponding assignment is also bigger, and the less user of time gap allocating, the message transmission rate of its corresponding assignment is also less.Obviously, the assignment of time slot also can realize time scheduling simultaneously.Therefore utilize method proposed by the invention can realize the scheduling of speed, time and the time slot of TDD system simultaneously with less signaling burden.
Claims (6)
1. a transfer of data strengthens the time division multiplexing dispatching method of relevant base stations control, comprises step:
A) subscriber equipment sends the scheduling reference information to the base station at a certain time interval;
B) the scheduling reference information uploaded according to each user of base station, and some this locality can reference information, determine the user to transmit data, and available transfer of data time slot is distributed to these users, and the speed or the power of these user data transmission is carried out assignment;
C) base station is to the subscriber equipment sending time slots assignment that can transmit data and speed or power assignment;
D) receive subscriber equipment that time gap allocating and corresponding power or speed adjusts will the time slot of appointment and with the speed of institute's assignment to the base station transmits data;
E) whether correctly the energy merging is carried out to the repeatedly re-transmitting data block that receives in the base station, decode, and differentiate reception;
F) if correctly receive, the base station will send correct the reception to subscriber equipment and reply, and otherwise, send correctly to receive and will reply;
G) if having received correct reception replys, subscriber equipment will send new data block by the transmitted power of new assignment, reply if received incorrect the reception, and subscriber equipment will retransmit former data block by the transmitted power of new assignment.
2. method according to claim 1 is characterized in that described local information comprises that noise added value, noise in each time slot increase the maximum transmission power that thresholding, each UE allowed.
3. method according to claim 1 is characterized in that having only in each time slot in scheduling process unique user to transmit data in this time slot.
4. method according to claim 1, the user who it is characterized in that not receiving time gap allocating will continue the control channel of monitoring transmission time slot assignment, wait for the arrival of time gap allocating.
5. method according to claim 1 is characterized in that: in step b), local information that can reference can comprise the delay requirement of user apparatus service transmission, and the higher certain priority of user of delay requirement can be given in the base station like this.
6. method according to claim 1 is characterized in that: in step b), the base station can be that absolute assignment also can be relative assignment to the speed or the power assignment of subscriber equipment.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101400137B (en) * | 2007-09-27 | 2010-04-21 | 鼎桥通信技术有限公司 | User equipment scheduling method and device |
| WO2010096947A1 (en) * | 2009-02-24 | 2010-09-02 | 上海贝尔股份有限公司 | A method, base station and relay station for performing an arq process in a relay based system |
| CN101656585B (en) * | 2009-08-27 | 2012-07-04 | 华为技术有限公司 | Method for dispatching time division multiplexing business and device thereof |
| CN102651682A (en) * | 2006-09-05 | 2012-08-29 | 高通股份有限公司 | Method and apparatus for data symbol and control symbol multiplexing |
| CN101547071B (en) * | 2008-03-26 | 2012-10-10 | 中兴通讯股份有限公司 | Uplink transmission/feedback method and uplink transmission/feedback system based on wireless communication time-division duplex (TDD) system |
| CN104427459A (en) * | 2013-08-27 | 2015-03-18 | 华为技术有限公司 | Data transmission method, terminal and base station |
| WO2015042829A1 (en) * | 2013-09-26 | 2015-04-02 | 华为技术有限公司 | Method for allocating coverage enhancement resources for user equipment, base station and user equipment |
| CN104955156A (en) * | 2014-03-26 | 2015-09-30 | 华为技术有限公司 | Data sending method, apparatus, base station and user's device |
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2005
- 2005-02-07 CN CN 200510008010 patent/CN1819673A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102651682A (en) * | 2006-09-05 | 2012-08-29 | 高通股份有限公司 | Method and apparatus for data symbol and control symbol multiplexing |
| US9094969B2 (en) | 2006-09-05 | 2015-07-28 | Qualcomm Incorporated | Method and apparatus for data and control multiplexing |
| CN102651682B (en) * | 2006-09-05 | 2015-10-07 | 高通股份有限公司 | For data symbol and the multiplexing method and apparatus of control character |
| US9509478B2 (en) | 2006-09-05 | 2016-11-29 | Qualcomm Incorporated | Method and apparatus for data and control multiplexing |
| CN101400137B (en) * | 2007-09-27 | 2010-04-21 | 鼎桥通信技术有限公司 | User equipment scheduling method and device |
| CN101547071B (en) * | 2008-03-26 | 2012-10-10 | 中兴通讯股份有限公司 | Uplink transmission/feedback method and uplink transmission/feedback system based on wireless communication time-division duplex (TDD) system |
| WO2010096947A1 (en) * | 2009-02-24 | 2010-09-02 | 上海贝尔股份有限公司 | A method, base station and relay station for performing an arq process in a relay based system |
| CN101656585B (en) * | 2009-08-27 | 2012-07-04 | 华为技术有限公司 | Method for dispatching time division multiplexing business and device thereof |
| CN104427459A (en) * | 2013-08-27 | 2015-03-18 | 华为技术有限公司 | Data transmission method, terminal and base station |
| CN104427459B (en) * | 2013-08-27 | 2018-04-20 | 华为技术有限公司 | A kind of data transmission method, terminal and base station |
| WO2015042829A1 (en) * | 2013-09-26 | 2015-04-02 | 华为技术有限公司 | Method for allocating coverage enhancement resources for user equipment, base station and user equipment |
| CN104955156A (en) * | 2014-03-26 | 2015-09-30 | 华为技术有限公司 | Data sending method, apparatus, base station and user's device |
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