CN1627844A - Dispatching method controlled from base station for enhancing up going dedicated channel in mobile communication system - Google Patents
Dispatching method controlled from base station for enhancing up going dedicated channel in mobile communication system Download PDFInfo
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Abstract
The disclosed method includes steps: Node B broadcasts information of shared channels through broadcast channel; Node B sets up time interval of reporting dispatch information; Node B transfers serial number of shared channels through down going DPCH of UE in sequence to selected UE; after receiving serial number of shared channels, UE sends dispatch information through up going enhanced shared channel; after receiving dispatch information of all UE, Node B determines UE to be dispatched and assignation information for dispatch; the said assignation information for dispatch through EU-SCCH related to EU-SICH is sent to UE needed to dispatch. Using signaling in physical layer combines transmission format of DCH transmission of UE in subzone, the invention controls transmission time, time slot and transmission codes so as to realize quick dispatching for DCH transmission of UE in subzone.
Description
Technical field
The present invention relates to have in time-division duplex (the being called for short TDD CDMA) mobile communication system dispatching method of up enhancing base station (Node B) control, particularly, Node B utilizes physical layer signaling that transmission rate, transmission time, transmission time slot and the transmitted codewords of the dedicated channel (DCH) of the subscriber equipment in the sub-district (UE) are controlled, to realize the scheduling of Node B to the DCH transmission of the UE in the sub-district.
Background technology
Third generation partner plan (being 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, the 3-G (Generation Three mobile communication system) up link technique for enhancing that 3GPP is implementing Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) is given and being ground, and expection will be in formal research up link technique for enhancing standardization effort on the basis that above-mentioned up link technique for enhancing is given grinding in 2004, the technical scheme that is produced will be contained in following Frequency Division Duplexing (FDD) (FDD) and the 3-G (Generation Three mobile communication system) technical standard of 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, or the up link technique for enhancing of time division duplex (TDD), 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 data service stronger to 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 (Node B) control, the request retransmission of mixing (being called for short HARQ) etc.Wherein about base station (Node B) control dispatching method, 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.For tdd mode, they also are possible scheduling schemes.
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 to be called for short TFCS for each UE) and two TFC threshold values.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 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) and is specifically designed to the current UE threshold value of UE application change.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.
Having the downlink signaling of physical layer to be called speed simultaneously replys (being called for short RG) and is 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 power 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 maximum permission transmitting power of UE is the noise increase surplus according to NodeB, 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/the slot transmission 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.
The time of above-mentioned second kind of base station (Node B) control at the FDD system and the noise level that the rate scheduling scheme can be controlled this sub-district more accurately make the maximum capacity of this sub-district.Following surface analysis once this scheme in the feasibility of TDD system.
At first, the content of the information that needs from Node B dispatching office, in the TDD system, the schedule information that UE reports can be identical with the schedule information that UE in the FDD system reports, and also is the state of the data buffer of UE, the power rating of UE and the maximum power capability of UE.But for holding at Node B, it is different that the available noise that measure increases surplus.In the FDD system, need be at Node B end, measure available noise increases surplus.Yet in the TDD system, business is transmitted on time slot, and therefore at Node B end, measure noise available on each time slot increases surplus, as the foundation of scheduling assignment.
Secondly, the content from the scheduling assignment information of Node B in the FDD system, when Node B sends scheduling assignment to UE, in its scheduling assignment information, comprise transport format combination set (TFCS), the initial moment of transmission and Transmission Time Interval.Yet in the TDD system, business is transmitted on time slot, the TDD system is that up code word is limited in addition, its transmission channel code word, can not independently select by UE, therefore in the TDD system, except will comprising transport format combination set (TFCS), the initial moment of transmission and Transmission Time Interval, also to comprise transmission time slot and transmission channel code word in the schedule information that Node B sends to UE.
In addition, from the transmission of physical layer signaling, in the FDD system, exist the Dedicated Physical Control Channel (DPCCH) relevant to be used for power control and synchronous etc. with Dedicated Physical Data Channel (DPDCH), therefore in the FDD system, can transmit the physical layer signaling of Node B scheduling with DPCCH.Yet in the TDD system, power control and synchronous signaling transmit in the data field of corresponding physical channel, therefore do not have DPCCH, therefore also can't transmit the physical layer signaling of Node B scheduling with this channel.Therefore, in the TDD system, need to introduce the physical layer signaling that new physical channel transmits Node B scheduling.
As can be seen, time and the rate scheduling scheme controlled at the base station (Node B) of FDD system also not exclusively are suitable for for the TDD system from above-mentioned analysis.The present invention proposes the dispatching method of base station (Node B) control that special uplink channel (DCH) strengthens in a kind of TDD of being applicable to CDMA mobile communication system, to realize the scheduling of Node B to the DCH transmission of the UE in the sub-district.
Summary of the invention
The dispatching method that the purpose of this invention is to provide base station (Node B) control that special uplink channel (DCH) strengthens in a kind of TDD of being applicable to CDMA mobile communication system.
For achieving the above object, the dispatching method of the base stations control that special uplink channel strengthens in a kind of mobile communication system comprises step:
A) Node B broadcasting share channel information on broadcast channel;
B) time interval of reporting of Node B configuration scheduling information;
C) Node B passes to selected UE by the descending DPCH of UE successively with serial number of shared channels;
D) after UE receives serial number of shared channels, UE will share on the information channel in specified up enhancing and send schedule information;
E) Node B determines UE and the scheduling assignment information that will dispatch after receiving the schedule information of all UE;
F) with scheduling assignment information with EU-SCCH that EU-SICH is associated on send to the UE that need dispatch.
The present invention utilizes physical layer signaling that transformat combination, transmission time, transmission time slot and the transmitted codewords of the DCH transmission of UE in the sub-district are controlled, and can realize the fast dispatch to the DCH transmission of UE in the sub-district.Define two kinds of novel shared physical control channels and come the physical layer for transmission signaling, avoided giving each UE to distribute a Dedicated Physical Control Channel, can alleviate the limited problem of up code word of TDD system better, made channel resource to be utilized effectively.Provided the method for Node B assignment UE use shared channel, the collision problem of having avoided shared channel to use effectively.Node B comes to UE assignment shared channel by the idle TFCI field of the descending DPCH of UE, and the outer spread spectrum code word of occupying volume has not effectively utilized channel resource.The present invention is transmitted DCH and is dispatched, 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 that increases 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 mobile communication system again.
Description of drawings
Fig. 1 is the business burst structure that has TFCI in the high code check TDD system;
Fig. 2 is the business burst structure that has TFCI in the low code check TDD system;
Fig. 3 is the operational flowchart of Node B in the dispatching method of the Node B control that strengthens of up DCH;
Fig. 4 is the operational flowchart of UE in the dispatching method of the Node B control that strengthens of up DCH;
Fig. 5 is the signaling process figure of the dispatching method of the Node B control that strengthens of up DCH;
Fig. 6 is the embodiment schematic diagram of the scheduling process of Node B control in the low code check TDD system.
Embodiment
The present invention proposes the dispatching method of base station (Node B) control that special uplink channel (DCH) strengthens in a kind of TDD of being applicable to CDMA mobile communication system, this method is by Node B the transmission of the dedicated channel (DCH) of the subscriber equipment in the sub-district (UE) to be controlled, and realizes the scheduling to the DCH transmission of UE in the sub-district.Specifically, Node B utilizes physical layer signaling, transport format combination set (TFCS), transmission time, transmission time slot and transmitted codewords to the DCH of UE are controlled, realization is to the scheduling of the DCH transmission of UE in the sub-district, the noise that reduces system increases the variance of (Noise Rise), avoid the overload of system, thereby improve the uplink cells throughput of system, the business that increases system covers.
The basic principle that the dispatching method of Node B control is realized among the present invention is that the UE in the sub-district utilizes physical layer signaling to send the schedule information that dispatching office needs to Node B, Node B is according to schedule information that each UE reported up then, dispatch, determine which UE can be engaged in transmitting in the enterprising industry of DCH, and determine these UE that can carry out professional transmission are in which time slot, which code word, when from, transmission how long.Node B utilizes physical layer signaling that these scheduling assignment information are passed to UE more then.In order to realize this method, in the present invention:
At first, the present invention has provided the definition of two kinds of physical layer signalings that the dispatching office of Node B control needs.Comprising the definition of the required information signaling of base station scheduling and the definition of base station scheduling assignment signaling.In base station scheduling information needed signaling, UE can provide the information of dispatching office need to Node B, such as buffer possession state, power headroom and maximum power capability.Utilize some information of these information and Node B local measurement, for example available noise increases the space in each ascending time slot, and Node B just can dispatch the UE in the sub-district.When in base station scheduling assignment signaling, NodeB can send scheduling assignment to UE, and which time slot UE just can know at like this, uses which code word, and from, with which type of speed, transmission how long.
Secondly, the present invention has provided the definition of the transmission channel after strengthening in the dispatching method of Node B control and the definition that is used for two kinds of shared physical channels of physical layer for transmission signaling.In the TDD system, there is not Dedicated Physical Control Channel (DPCCH), therefore need the new physical channel of definition to transmit the physical layer signaling that dispatching office needs.Transmit physical layer signaling, can adopt the mode of time division multiple access (TDM) and code division multiple access (CDM).If transmit physical layer signaling, need in physical channel, punch so with the TDM mode.Since the information transmitted bit of wanting more, on physical channel, punch, will seriously influence link gain, so the TDM mode, also inapplicable here.Therefore adopted the CDM mode to come the physical layer for transmission signaling in the present invention.In addition, because the TDD systematic codeword is limited, all distribute a Dedicated Control Channel to come the physical layer for transmission signaling for each user, cost is too big, therefore provided the method for coming the physical layer for transmission signaling with two kinds of shared control channels in the present invention, these two kinds of shared channels are respectively: information channel (EU-SICH) and up enhancing shared control channel (EU-SCCH) are shared in up enhancing.
The 3rd, the present invention gives a kind of method of avoiding the collision problem of generation in the shared channel use.Because being a plurality of UE, shares shared channel, therefore when certain UE transmits information in Uplink Shared Channel, another one UE may also can use this shared control channel, because two UE have used identical spreading code to transmit separately information, will cause loss of data like this.Therefore the present invention has provided the method for avoiding the collision problem of generation in this shared channel use.
The present invention has provided the dispatching method of base station (Node B) control that special uplink channel (DCH) strengthens, and has at first provided the concrete definition of two kinds of physical layer signalings that the dispatching office of Node B control needs in invention:
● base station scheduling information (NSI), this signaling are to pass to Node B by UE.
The parameter that comprises in this signaling has: buffer possession state, power headroom and maximum power capability.
● base station scheduling assignment (NSA), this signaling are to pass to UE by Node B.
The parameter that comprises in this signaling has: transformat combination, time slot, code word, duration, and beginning System Frame Number (for high code check TDD system) or beginning system subframe numbers (for low code check TDD system).
Secondly, provided the definition of the transmission channel after strengthening in the dispatching method of Node B control and the definition that is used for two kinds of shared physical channels of physical layer for transmission signaling in the present invention:
●EU-DCH
In the TDD system, for a kind of novel uplink dedicated transmission channel that carries out up enhancing of existing dedicated transmission channel.
●EU-SICH
In the TDD system, be used to transmit the up shared physical channel of up enhancing control information and schedule information.
●EU-SCCH
In the TDD system, be used to transmit the up shared physical channel of up enhancing control information and scheduling assignment.
It should be noted that an EU-SICH always is associated with a specific EU-SCCH in the present invention, that is to say that this relation to EU-SICH and EU-SCCH is predefined, can represent with a sequence number.Time relationship between EU-SICH and EU-SCCH will meet some requirements in addition, that is to say that the time migration between EU-SICH and EU-SCCH is greater than certain scope, need the number of the maximum number of user dispatched and shared channel relevant in the main and sub-district of the size of this skew, need the number of users of scheduling many more, the shared channel number is few more, and this time skew is big more.This time migration is also relevant with the dispatching algorithm processing time of Node B in addition.
In addition, the present invention gives the method for avoiding the collision problem of generation in the shared channel use.Because Node B knows the operating position of shared channel, if the use that comes to distribute shared channel to UE by Node B, the collision problem that uses of shared channel just can be avoided so.Here provided Node B distributes shared channel to UE method.At first, Node B goes up the information of the lasting broadcasting share channel of UE in the sub-district at broadcast channel (BCH).This information content is as shown in table 1.
The shared channel information content that table 1 is broadcasted on BCH
| The shared channel sequence number | ????EU-SICH | ????EU-SCCH | The frame of EU-SICH and EU-SCCH or sub-frame interval | ||
| Time slot | Code word | Time slot | Code word | ||
| ????1 | ??TS SI1 | ????C SI1 | ??TS SC1 | ??C SC1 | ????n 1 |
| ????2 | ??TS SI2 | ????C SI2 | ??TS SC2 | ??C SC2 | ????n 2 |
| ???? | ?? | ???? | ?? | ?? | ???? |
| ????N usc | ??TS SIN | ????C SIN | ??TS SCN | ??C SCN | ????n n |
In the table, N
UscBe the number of the shared control channel (EU-SICH/EU-SCCH) that is provided with in the sub-district, TS
SIiFor sequence number is the time slot at the EU-SICH place of i, C
SIiFor sequence number is the used code word of EU-SICH of i, TS
SCiFor sequence number is the time slot at the EU-SCCH place of i, C
SCiFor sequence number is the used code word of EU-SCCH of i, n
iFor sequence number be the EU-SICH of i and the frame of EU-SCCH (for high code check TDD) or subframe (for low code check TDD) at interval.
As can be seen from the above table, after UE receives above-mentioned broadcast message, if can receive the serial number of shared channels of Node B assignment, which time slot UE just can know on so, which code word to transmit the schedule information of oneself with, and then how many frames of interval or subframe, at which time slot, which code word to have received the scheduling assignment information of oneself with.
Provide Node B below and send the method for shared channel sequence number, before providing this method, at first provide in high code check TDD system and the low code check TDD system, send the business burst structure of transformat combination indication (TFCI) to UE.Its business burst structure chart is respectively shown in Fig. 1 and Fig. 2.
The method of the transmission shared channel sequence number that the present invention proposes is: have the UE of up enhancement function, it is descending to have two DPCH (DPCH) at least, and these two DPCH carry out business with the burst structure type as Fig. 1 or Fig. 2 as shown in and transmit.The TFCI field of one of them DPCH is used for transmitting TFCI, and the TFCI field of an other DPCH is used for transmitting the serial number of shared channels of institute's assignment.The advantage of transmitting the shared channel sequence number in this way is, do not need to introduce new physical channel, reduced expense, need not punch on channel in addition, also can not influence channel transmission quality.
Provide the detailed process of the dispatching method of base station (Node B) control that special uplink channel (DCH) that the present invention proposes strengthens below, at first provide the operating process of Node B in this method, the operating process flow chart of NodeB as shown in Figure 3.
301, flow process begins.
302, Node B goes up the broadcasting share channel information at broadcast channel (BCH).
303, Node B configuration scheduling time interval timer.The value of setting in this timer is the time interval of reporting of scheduling information (SI).That is to say that the UE with up enhancement function in the sub-district every the regular hour, will give Node B reporting of scheduling information (SI), Node B determines whether and need dispatch the DCH transmission of UE again according to schedule information then.The setting of time interval value and the performance of scheduling, the burden of system signaling, the number that has up enhancement function user in shared channel number of setting in the sub-district and the sub-district is relevant.This time interval establishes more for a short time, so schedule information report frequently more, schedule information is also just accurate more like this, thereby scheduling performance is also good more.But blanking time is short more, and the signaling burden of system is also heavy more.If the shared channel number of setting in the sub-district is bigger, and the up enhancing number of users in the sub-district is less, so this time interval can establish less, otherwise this time interval will establish greatlyyer.
304, Node B passes to selected UE by the descending DPCH of UE successively with all serial number of shared channels.Suppose that the EU-SICH that sets in the sub-district has N
UscIndividual, Node B will select N at the most so
UscIndividual UE with up enhancement function, and with this N
UscIndividual serial number of shared channels is passed to these UE.The number N of shared channel
UscSetting and the level of resources utilization of system, the time delay of the scheduling of Node B control, need the number of users dispatched in the system what are relevant.Need the number of users dispatched many more in the system, the scheduling time delay is more little, so the N of Yao Qiuing
UscBig more, but N
UscBig more, the available traffic channel of system is few more, and the level of resources utilization of system reduces.
305, Node B receives the schedule information (NSI) that UE sends on the EU-SICH of appointment.
306, judge whether that all UE with up enhancement function have passed to Node B with NSI information, if not, forward 304 to, continue selected UE, the shared channel sequence number is passed to selected UE.If then forward 307 to.
307, after all UE with up enhancing have passed to Node B with NSI information, Node B will make scheduling assignment according to these NSI information, and generation will be passed to the Node B scheduling assignment (NSA) of the UE that needs scheduling.
308, Node B will pass to NSA information the UE that needs scheduling respectively uploading on the EU-SCCH that the EU-SICH of NSI information is associated with the assignment UE of institute.
309, whether Node B will continue to monitor the scheduling interval timer after sending scheduling assignment, overflow.Forward 310 to if overflow.
310, judge that up DCH goes up all data services of transmitting and whether finishes, forward 303 if not to, if forward 311 to.
311, flow process finishes.
Afterwards, provide the operating process of UE in this method, the operating process flow chart of UE as shown in Figure 4.
401, flow process begins.
402, UE goes up the shared channel information that receives Node B broadcasting at broadcast channel (BCH).
403, whether to some extent UE goes up the monitoring shared channel sequence number of assignment at the descending DPCH of each frame (for high code check TDD) or each subframe (for low code check TDD), and whether Node B has distributed the shared channel of transmitting scheduling information for this UE to monitor.If forward 404 to; If not, forward 407 to.
404, UE sends schedule information (NSI) to Node B on the specified EU-SICH of shared channel sequence number.
405, UE with EU-SCCH that specified EU-SCCH is associated on monitoring whether the scheduling assignment information (NSA) of Node B to its transmission is arranged.If not, forward 403 to; If forward 406 to.
406, UE begins the assignment according to schedule information, at the time slot of appointment, with the code word of appointment, from specified system-frame or system's subframe, begins to carry out the business transmission with duration of appointment.
407, then whether the transmitting continuous time of judging appointment in the NSA information.Attention: if this moment, UE did not also receive Node B scheduling assignment, then this Rule of judgment is for denying.If forward 408 to; If not, forward 409 to.
408, get back to the preceding transmission state of Node B scheduling.
409, judge whether the up enhancing business of this UE finishes.If forward 410 to: if not, forward 403 to.
410, flow process finishes.
Provided the physical layer signaling flow process of the dispatching method of base station (Node B) control that special uplink channel (DCH) that the present invention proposes strengthens at last, as shown in Figure 5.
501, Node B is the broadcasting share channel information on broadcast channel.The content of shared channel is as shown in table 1.
502, Node B configuration scheduling time interval timer.
503, Node B sends serial number of shared channels on the TFCI field on the descending DPCH of UE.Parameter: shared channel sequence number.
504, after UE receives serial number of shared channels, UE will send schedule information (NSI) on specified EU-SICH.Parameter: buffer possession state, power headroom and maximum power capability.
505, Node B is after receiving the schedule information of all UE, will with some local measurement information, noise as local measurement increases the foundation that surplus is adjudicated as scheduling together, definite UE that will dispatch and scheduling assignment information (NSA), then with NSA information with EU-SCCH that EU-SICH is associated on send to the UE that need dispatch.Parameter: transport format combination set, time slot, code word, starter system frame number (for high code check TDD) or starter system subframe numbers (for low code check TDD), and duration.
506, when scheduling time interval timer then after, repeat 502 to 505 processes.
Embodiment
The present invention proposes the dispatching method of base station (Node B) control that special uplink channel (DCH) strengthens in a kind of TDD of being applicable to CDMA mobile communication system, this method is by Node B the transmission of the dedicated channel (DCH) of the subscriber equipment in the sub-district (UE) to be controlled, and realizes the scheduling to the DCH transmission of UE in the sub-district.For the ease of understanding the present invention, provided the embodiment of a Node B scheduling process in low code check TDD (LCR-TDD) system below, its schematic diagram is as shown in Figure 6.
Suppose and in the LCR-TDD system, in current area, be provided with N
Usc=4 pairs of shared control channels (EU-SICH/EU-SCCH), and total N in the current area
u=11 up enhancing users that carrying out professional transmission.Owing in the sub-district 4 pairs of shared control channels are only arranged, therefore in each subframe, can only have 4 UE to send schedule information at most.So, transmit all up enhancing users' schedule information, the number of sub frames that needs at least is:
Scheduling process is as follows:
The first step, Node B selectes N
UscIndividual UE, and on the TFCI field of the descending DPCH of each UE, send the EU-SICH/EU-SCCH channel designator of this UE assignment respectively to.
In second step, Node B wants the configuration scheduling time interval timer, notices that dispatch interval time is greater than N
f, reason is just can make the scheduling judgement after Node B will receive all up enhancing users' schedule information, dispatch interval time also will comprise the processing time of Node B in addition.
The 3rd step, selected N
UscIndividual UE sends the schedule information of oneself respectively to Node B on specified EU-SICH.
In the 4th step, Node B selects N again in remaining UE
UscIndividual, EU-SICH is given in assignment, and UE sends schedule information on corresponding EU-SICH then.All schedule information is issued Node B up to all up enhancing UE.
In the 5th step, Node B processes schedule information, provides scheduling assignment information, sends scheduling assignment information on corresponding EU-SCCH the UE that makes scheduling assignment.It should be noted that, schedule information the transmission on the EU-SCCH and do not require scheduling time at interval in, also may in next one scheduling time interval, send scheduling assignment, as long as the sub-frame interval that the sequential relationship of EU-SCCH and EU-SICH satisfies in the table 1 requires just passable.
In the 6th step,, repeat the first step in scheduling time interval last subframe then.Begin second to the 6th step of repetition in next subframe then.
As can be seen from Figure 6, according to said method, Node B can with the shared control channel timesharing distribute to UE with up enhancing, make it schedule information can be reported Node B by Uplink Shared Channel, and the collision that shared channel uses do not take place.Node B also can send to UE with scheduling assignment by DSCH Downlink Shared Channel after receiving schedule information, finish scheduling process.
Claims (13)
1. the dispatching method of the base stations control that special uplink channel strengthens in the mobile communication system comprises step:
A) Node B broadcasting share channel information on broadcast channel;
B) time interval of reporting of Node B configuration scheduling information;
C) Node B passes to selected UE by the descending DPCH of UE successively with serial number of shared channels;
D) after UE receives serial number of shared channels, UE will share on the information channel in specified up enhancing and send schedule information;
E) Node B determines UE and the scheduling assignment information that will dispatch after receiving the schedule information of all UE;
F) with NSA information with EU-SCCH that EU-SICH is associated on send to the UE that need dispatch.
2. by the described method of claim 1, it is characterized in that also comprising step: when scheduling time at interval then after, repeat b) to f) process, the up enhancing number of users that is carrying out professional transmission in the sub-district is zero.
3. by the described method of claim 1, it is characterized in that: in step a), the shared channel information that Node B broadcasts on broadcast channel comprises the sequence number of shared channel EU-SICH/EU-SCCH, the time slot of each EU-SICH and code word, the time slot of each EU-SCCH and code word, and the frame of the EU-SICH of same sequence number and EU-SCCH or sub-frame interval.
4. by the described method of claim 1, it is characterized in that: in step b), suppose to be provided with N in the sub-district
UscTo shared control channel, and total N in the sub-district
uThe individual up enhancing user who is carrying out professional transmission, Node B is T for the processing time of schedule information (NSI)
p, the dispatch interval time T that sets of Node B so
dSatisfy following condition:
(2)
5. by the described method of claim 1, what it is characterized in that described UE descendingly has two DPCH at least, the TFCI field of one of them DPCH is used for transmitting TFCI, and the TFCI field of another DPCH is used for transmitting the serial number of shared channels of institute's assignment.
6. by the described method of claim 1, it is characterized in that: in step c), because the number of the up enhancing user in the sub-district may be greater than set shared channel number, so Node B wants a frame one frame or subframe ground of a subframe that the shared channel sequence number is passed to all up enhancing UE.
7. by the described method of claim 1, it is characterized in that: in step d), UE sends schedule information on the specified EU-SICH of shared channel sequence number.
8. by the described method of claim 7, it is characterized in that the schedule information that described UE sends comprises: buffer possession state, power headroom and maximum power capability.
9. by the described method of claim 1, it is characterized in that: in step e), Node B determines following scheduling assignment information according to schedule information: transformat combination, transmission time slot, transmitted codewords, duration, and beginning System Frame Number and beginning system subframe numbers.
10. by the described method of claim 1, it is characterized in that: in step f), refer to and send the EU-SCCH that the EU-SICH of NSI information has identical shared channel sequence number with EU-SCCH that EU-SICH is associated.
11. by the described method of claim 10, it is characterized in that: after UE receives NSA information, to carry out the business transmission according to the parameter of institute's assignment, if before the duration of assignment finishes, do not receive new assignment, so when the assignment time then after, will come back to transmission state before the scheduling.
12., it is characterized in that described EU-SICH is used to transmit the ascending control information of up enhancing and the up shared physical channel of schedule information in the TDD system by the described method of claim 1.
13., it is characterized in that described EU-SCCH is used to transmit the Downlink Control Information of up enhancing and the Physical Downlink Shared Channel of scheduling assignment in the TDD system by the described method of claim 1.
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