CN1969482A - Method and apparatus for data transmission/scheduling for uplink packet data service in a mobile communication system - Google Patents
Method and apparatus for data transmission/scheduling for uplink packet data service in a mobile communication system Download PDFInfo
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Abstract
A method and apparatus are provided for scheduling uplink data transmission in a mobile communication system. The method and apparatus include a base station scheduler for efficiently allocating radio communication resources in a mobile communication system using an E-DCH or DCH. The method and apparatus further include a User Equipment (UE) for using both an E-DCH and a conventional DCH to efficiently select the data rate of the E-DCH and the data rate of the conventional DCH. The method and apparatus can maintain the total transmit power of the UE at the time of retransmission the same as the total transmit power of the UE at the time of initial transmission regardless of the existence or absence of the DCH, thereby minimizing the change in the quantity of interference generated in the uplink by the UE.
Description
Technical field
The present invention relates to cellular CDMA (CDMA) communication system.The present invention is specifically related to a kind of method and apparatus of efficient data transmission/scheduling of the uplink dedicated transport channels that is used to strengthen.
Background technology
Universal mobile communications service (UMTS) system is the third generation (3G) mobile communication system, and it uses Wideband Code Division Multiple Access (WCDMA) (WCDMA) scheme based on general packet radio service (GPRS) and European mobile communication system-global system for mobile communications (GSM).The UMTS system provides stable service, can be with the packet-based text of high-speed transmission, digitized speech or video and the multi-medium data of 2Mbps at least.
In the UMTS system, use the up-link (EUDCH or E-DCH) that strengthens to come the performance of transmitted in packets in enhanced uplink (UL) communication, UL communication is exactly, from subscriber equipment (UE) to base station (BS) or the reverse or reverse link communication of Node B (below only be called " Node B ").For the more stable data transmission of realization speed, E-DCH supports multiple technologies, as adaptive modulation and coding (AMC) scheme, mix automatic repeat requests (HARQ) scheme and base stations control is dispatched.
The AMC scheme is the technology that is used to strengthen radio resource efficiency, and it passes through according to the channel status between Node B and the UE, and the modulation scheme of specified data channel and encoding scheme realize.Modulation is the combination of modulation scheme and encoding scheme with encoding scheme (MCS), and provide can be according to the various MCS levels of supported modulation scheme and encoding scheme definition.That is to say that AMC determines the MCS level adaptively according to the channel status between Node B and the UE, thereby strengthen the efficient of wireless frequency.
The HARQ scheme be when before the packet that sends when having mistake retransmission packet with the technology of compensation grouping mistake.The HARQ scheme can be divided into Chase and merge (CC) scheme and incremental redundancy (IR) scheme.According to the CC scheme, when the packet that sends before has mistake, retransmit and the identical grouping of packet format that sends before.According to the IR scheme, when the packet that sends before has mistake, retransmit and the different grouping of packet format that sends before.
Dispatch according to base stations control, Node B determines whether to send uplink data and the possible data transfer rate upper limit when using E-DCH to send data, and UE issues the schedule information of determining of UE from Node B by reference, determine the data transfer rate of up link E-DCH, and send data with determined data transfer rate.
Fig. 1 illustrates in the legacy wireless communication system uplink packet transmission by E-DCH.
In Fig. 1, Reference numeral 100 refers to the Node B of supporting E-DCH, and Reference numeral 101,102,103 and 104 refers to the UE that uses E-DCH.As shown in the figure, UE 101 to 104 sends data by E-DCH111,112,113 and 114 to Node B 100.
When Node B 100 is operated at operation dispatching, utilize the metadata cache zone state of the UE 101 to 104 that uses E-DCH, the data transfer rate or the channel condition information of request, regulate the E-DCH data transfer rate, perhaps whether can send the E-DCH data to each UE report.In aforesaid scheduling, in order to strengthen the performance of whole system, at noise incremental quantity that prevents to measure (noise rise) or rise-over-thermal (Rise-over-Thermal, when RoT) value surpasses desired value, for (for example from Node B UE far away, UE 103 and 104) distributes lower data transfer rate, and be to distribute the higher data rate from the near UE of Node B (for example, UE 101 and 102).
Fig. 2 is the message flow chart of the traditional signal transmission/receiving course that passes through E-DCH.
In step 202, Node B and UE set up E-DCH.Establishment step 202 comprises the transmission of messages by dedicated transmission channel.After E-DCH set up, UE reported schedule information to Node B in step 204.Schedule information can be the uplink traffic channel information that comprises following message: data volume to be sent of accumulating in the information of UE transmission power information, the dump power that can launch about UE, the buffer area of UE etc.
After a plurality of UE from communication with it received schedule information, in step 206, Node B monitored the schedule information from a plurality of UE, so that dispatch the transfer of data of each UE.Specifically, the uplink packet transmission of Node B approval UE, and in step 208, send the scheduling assignment information to UE.The scheduling assignment information comprises about the data transfer rate that allows, to transmitting the information such as timing that allowed.
UE dispatches assignment information by using in step 210, the transformat (TF) of the E-DCH of the definite up link that will transmit, in step 212, send system for uplink packet data, and in step 214, send TF information to Node B by this E-DCH by this E-DCH.TF information comprises transport format resource designator (TFRI), the required information of indication demodulation E-DCH.When sending TF information in step 214, UE selects the MCS level based on data transfer rate and channel status that Node B is distributed to UE, and sends system for uplink packet data based on selected MCS level.
In step 216, Node B determines whether TF information or grouped data have mistake.In step 218, by the ACK/NACK channel, when any of TF information and grouped data had mistake, Node B sent negative response (NACK) information, and when TF information and grouped data all are free from mistakes, transmission affirmative acknowledgement (ACK) information.When having sent the ACK information of expression packet data transmission success, UE sends new E-DCH data by E-DCH.When having sent nack message, UE sends by E-DCH has the E-DCH data of identical content.
In aforesaid conventional procedure, total RoT that Node B is measured and estimated to use in the sub-district, and in the sub-district, distribute the not extra RoT of usefulness for E-DCH in the scope of admissible maximum RoT.Here, RoT represents the uplink resource that Node B is used.
In order to improve the performance of system, be necessary to optimize the extra RoT (as resource) that can be the E-DCH distribution.For this optimization, need a kind of reasonable measurement and estimate the method for the current total RoT that is just using.According to conventional method, current total RoT possibility of just using is measured and estimate too highly, thereby may exceedingly reduce assignable resource, and can make the decreased performance of whole system.In addition, also do not disclose at the same time between the D-DCH that exists as uplink channel and the DCH effectively method of allocating resources.Therefore, existing DCH is difficult to provide gratifying service quality.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to solve the problems referred to above that occur in the prior art, and an object of the present invention is to provide a kind of method and apparatus, base station dispatcher by it can be in the mobile communication system of the uplink dedicated transport channels that use to strengthen distributing radio resource efficiently.
Another object of the present invention provides a kind of method and apparatus, and the subscriber equipment (UE) of the uplink dedicated transport channels that use to strengthen and traditional dedicated transmission channel can be selected the data transfer rate of the uplink dedicated transport channels that strengthens and the data transfer rate of typical dedicated transmission channel efficiently by it.
Another object of the present invention provides a kind of method and apparatus, can determine to use the data transfer rate of the subscriber equipment (UE) of the uplink dedicated transport channels of enhancing and traditional dedicated transmission channel by it, and is not subjected to the restriction of dedicated transmission channel.
Another object of the present invention provides a kind of method and apparatus, it can keep total transmitting power of UE identical with the total transmitting power of UE when sending for the first time when retransmitting, and no matter the existence of DCH whether, thereby make the variation minimum of the interference volume that UE produces in up link.
To achieve these goals, provide a kind of in mobile communication system the method for scheduling uplink transfer of data, this mobile communication system is by first channel and second channel support uplink packet data service.The method comprising the steps of: the average data rate of determining first channel; Based on total Radio Resource and poor corresponding between the Radio Resource of the average data rate of determined first channel, determine the maximum data rate of second channel; And send the scheduling assignment information of the determined maximum data rate of indication to subscriber equipment (UE), wherein, second channel is dispatched, and first channel is not dispatched.
According to a further aspect in the invention, provide a kind of in mobile communication system the device of scheduling uplink transfer of data, this mobile communication system is by first channel and second channel support uplink packet data service.This device comprises: the scheduling signals maker, be used for determining that expection is used for the average data rate of first channel, based on total Radio Resource and poor corresponding between the Radio Resource of the average data rate of determined first channel, determine the maximum data rate of second channel, and generate the scheduling signals of the determined maximum data rate of indication; The scheduling signals transmitter is used for sending the scheduling signals that is generated to subscriber equipment (UE); With the scheduling signals transmission control unit (TCU), be used to control scheduling signals maker and scheduling signals transmitter, make and can send scheduling signals with predetermined dispatching cycle, wherein, second channel is dispatched, and first channel is not dispatched.
According to a further aspect in the invention, provide a kind of method that in the mobile communication system of support uplink packet data service, sends uplink data.The method comprising the steps of: the scheduling assignment information that receives the maximum data rate of indication first channel and second channel; Based on maximum data rate, determine the data transfer rate of first channel; Poor based between the maximum data rate of first channel and the data transfer rate determined the data transfer rate of second channel; And use determined data transfer rate to send the uplink data of first channel and second channel, wherein, second channel is dispatched, and first channel is not dispatched.
According to a further aspect in the invention, provide a kind of device that in the mobile communication system of support uplink packet data service, sends uplink data.This device comprises: dispatch the assignment information receiver, be used to receive the scheduling assignment information of the maximum data rate of indicating first channel and second channel; Controller is used for determining based on maximum data rate the data transfer rate of first channel, and poor based between the maximum data rate of first channel and the available data rate, determines the data transfer rate of second channel; And transmitter, be used to use determined data transfer rate to send the uplink data of first channel and second channel, wherein, second channel is dispatched, and first channel is not dispatched.
Description of drawings
By the detailed description below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention, feature and advantage will be clearer, wherein:
Fig. 1 illustrates the uplink packet transmission of passing through the up-link (E-DCH) of enhancing in the legacy wireless communication system;
Fig. 2 illustrates the message flow chart of traditional signal transmission/receiving course that passes through E-DCH;
The flow chart that Fig. 3 illustrates according to an embodiment of the invention, wherein Node B generates the process of dispatching command for each subscriber equipment (UE);
Fig. 4 illustrates according to an embodiment of the invention, the flow chart of the process of UE specified data rate wherein;
The flow chart that Fig. 5 illustrates according to an embodiment of the invention, wherein UE determines the process of transmitting power;
Fig. 6 illustrates according to an embodiment of the invention, is used for the block diagram of structure of device of the scheduling assignment information of sending node B; And
Fig. 7 illustrates the block diagram according to the device of the transmitting power of the data transfer rate embodiment of the invention, that be used for definite UE and control UE.
Embodiment
Embodiments of the invention are described below with reference to accompanying drawings.In the following description, when to incorporating the known function and the detailed description of configuration when theme of the present invention is not known here into, will omit this detailed description.In addition, the various particular term that occur in describing below are considered function of the present invention and are defined, and can change according to user and operator or client's wish.Therefore, the definition of these terms must be based on the content of the whole specification of the present invention.
Core of the present invention is the improvement to the system for uplink packet data service of mobile communication system.For convenience of description, the up-link (E-DCH) of up-link (DCH) being discussed and being strengthened.Transmitting power used herein and data transfer rate generally have relation one to one.Therefore, in the following description they two all will be used.
At first, in order to prevent of the poor efficiency utilization of aforesaid Node B, the method for the summation of the resource of using in a kind of reasonable measurement of needs and the estimation sub-district to resource.That is to say that the utilizable stock number of Node B (as the RoT of the subscriber equipment that will use the E-DCH in the sub-district (UE)) is poor corresponding to the total RoT's that uses in admissible maximum RoT and the sub-district in the sub-district.Information about admissible maximum RoT in the sub-district is notified Node B by radio network controller (RNC).
The total RoT that uses in the sub-district comprises the RoT of DCH and the RoT of other channels.Under the situation of DCH, UE is from by the transformat combination of selecting the transport format combination set (TFCS) of Node B signaling corresponding to the data transfer rate (or transmitting power) of DCH (TFC).Therefore, Node B can't be learnt the accurate data transfer rate (or transmitting power) of each UE on particular point in time in advance.Therefore, be difficult to carry out accurate estimation to the RoT of DCH.Node B is unique to be exactly RoT corresponding to this data transfer rate (or transmitting power) from what understand for maximum data rate (or transmitting power) that each UE allowed.
If Node B is considered the RoT that used in the calculation plot for the maximum data rate (or transmitting power) that each UE allowed, then can distribute to the RoT a resource shrinkage of E-DCH.This is because the DCH that each UE sends does not always send with the maximum data rate from the TFCS of Node B signaling (or transmitting power).Therefore, embodiments of the invention provide a kind of statistical property of the DCH data transfer rate (or transmitting power) that utilizes each UE so that the method for the DCH RoT that reasonably estimates to have used in the sub-district.
RNC can understand the statistical property of the data transfer rate (or transmitting power) of each UE by test in advance or by the data transfer rate (or transmitting power) of each UE in the observation subdistrict in the section at the fixed time.RNC can estimate average data rate by utilizing statistical property, and can be based on average data rational prediction DCH RoT.In order efficiently to utilize up link RoT resource, with the optimizing scheduling factor alpha of each UE
i(0≤α
i≤ 1, α wherein
iExpression is corresponding to the optimizing scheduling coefficient of i UE) be defined as the ratio of average data rate and the maximum data rate that is allowed of each UE, and RNC can be based on the optimizing scheduling factor alpha
i, rational prediction DCH RoT.RNC sends to Node B with the average data rate of the optimizing scheduling coefficient that calculates or the estimation corresponding with the optimizing scheduling coefficient that calculates, thereby Node B can be used their prediction DCH RoT.In the example of Miao Shuing, the prediction of DCH RoT is carried out by RNC in the above.Yet according to the selection of system designer, Node B also can be predicted DCH RoT.
To describe below according to the method embodiment of the invention, that be used to estimate the optimizing scheduling coefficient.
The optimizing scheduling coefficient is the ratio of DCH average data rate (or transmitting power) and DCH maximum data rate (or transmitting power), and it can be represented with following formula (1):
In formula (1), i is the index of each UE of indication, and j is the index of each TFC of indication, E[R
DCHi, j] expression i UE DCH average data rate (or transmitting power), Pr (DCH
I, j) expression has the DCH probability of happening of i UE of j TFC, R
DCHi, jExpression has the DCH data transfer rate (or transmitting power) of i the UE of j TFC, and
Expression has the maximum data rate (or transmitting power) of permission of i the UE of j TFC.
Fig. 3 is according to the embodiment of the invention, wherein Node B is the flow chart of process of the generation dispatching command of each UE.
In step 301, Node B is to the RoT of each UE calculating corresponding to expection DCH average data rate (or transmitting power).RoT multiply by the DCH maximum data rate (or transmitting power) of each UE and amassing of acquisition corresponding to the optimizing scheduling coefficient of each UE.Utilize the optimizing scheduling coefficient as described above, can prevent owing to calculate excessive the RoT that uses in the sub-district and the waste RoT that may cause.Also can calculate the RoT of other uplink common channel.
In step 302, the total RoT's that calculates in maximum RoT that allows in the Node B use sub-district and the step 301 is poor, as the maximum RoT that can distribute to E-DCH in the sub-district.The total RoT that calculates in the step 301 represents the total RoT to DCH and E-DCH, and can comprise total RoT of common signal channel.Generally speaking, the RoT that distributes to the control channel relevant with data channel and common signal channel is a predetermined fixed, or determine based on the RoT that distributes to respective data channels.Therefore in this manual the Radio Resource of distributing to uplink data channel will only be discussed.The maximum RoT that allows in the sub-district is the value of giving Node B from the RNC signaling.
In step 303, Node B obtains the E-DCH maximum data rate (or transmitting power) of each UE based on the E-DCH schedule information that receives from each UE, and it is no more than total RoT that can distribute to E-DCH in the sub-district.
In step 304, Node B generates the scheduling assignment information of each UE, and it is included in the E-DCH maximum data rate of each UE that calculates in the step 303.The scheduling assignment information is represented the maximum data rate of E-DCH and DCH.For example, the scheduling assignment information can be expressed as one of information of following type.
Information No.1 indicates ' comprising the aggregate date rate that maximum DCH and E-DCH, each UE can send '.That is, UE determines DCH data transfer rate and the E-DCH data transfer rate in the aggregate date rate.
' the maximum E-DCH data transfer rate of each UE ' and ' the optimizing scheduling coefficient of each UE ' in the step 303 of information No.2 indicator diagram 3.Each UE can obtain the information identical with information No.1 by calculating ' E-DCH maximum data rate and optimizing scheduling coefficient multiply by the sum of products that the DCH maximum data rate obtains '.The DCH maximum data rate is the value from the RNC signaling to UE.
' the DCH average data rate that the expection of each UE sends ' in the step 301 of information No.3 indicator diagram 3 and ' the E-DCH maximum data rate of each UE ' (as value of calculating in the step 303).Each UE can obtain the information identical with information No.1 by these two values.
Information No.4 indicates ' the DCH maximum data rate of each UE and E-DCH maximum data rate sum '.The E-DCH maximum data rate is to consider the DCH maximum data rate of each UE rather than the value that the DCH average data rate calculates.
Information No.5 indicates ' E-DCH maximum data rate '.The E-DCH maximum data rate is to consider the DCH maximum data rate of each UE rather than the value that the DCH average data rate calculates.UE generates information No.4 by use information No.5 with from the TFCS of Node B signaling.
Each UE can understand ' comprising that maximum DCH and E-DCH, each UE can send data transfer rate '.Can send data transfer rate if each transmission channel is assigned with maximum, other channels just can not use remaining data transfer rate after each transmission channel uses data transfer rate so, thereby can not realize the resources effective utilization.Yet if each UE has the knowledge of ' comprising that maximum DCH and E-DCH, each UE can send data transfer rate ', it can send in maximum and determine DCH and E-DCH data transfer rate in the data transfer rate neatly so, thereby realizes the efficient utilization of resource.In addition, by information No.4 or No.5, UE can send in maximum and determine DCH and E-DCH data transfer rate in the data transfer rate neatly, thereby realizes the efficient utilization of resource.
Fig. 4 is according to the embodiment of the invention, the flow chart of the process of UE specified data rate wherein.
In step 400, UE receiving scheduling assignment information (or missile total transmitting power), perhaps receiving scheduling assignment information and calculate missile total transmitting power based on the scheduling assignment information that receives from Node B.Total transmitting power comprises the DCH data volume in the UE buffer area, current available transmitting power, current available TFCS and the ability of UE.
In step 401, UE determines the data transfer rate of DCH.Generally speaking, DCH has the same high priority with voice data.Therefore, under the existence of not considering E-DCH whether situation, determine the data transfer rate of DCH.That is, consider total transmitting power in the TFCS of Node B signaling, that UE can launch, determine the data transfer rate (or transmitting power) of DCH.
In step 402, the transmit power limit value of relatively more total transmitting power (comprising that the DCH of distribution and maximum E-DCH, UE can send data transfer rate) of UE and UE.The transmit power limit value of UE is the upper limit of emission power that power amplifier can allow, and can not realize to be higher than the power emission of transmit power limit value physically.Result as a comparison, when total transmitting power during less than the transmit power limit value of UE, UE advances to step 403.
In step 403, relatively total transmitting power of UE and transmitting power corresponding to the DCH data transfer rate of determining in the step 401.When total transmitting power greater than corresponding to the transmitting power of the DCH data transfer rate of determining in the step 401 time, in step 404, UE is defined as the E-DCH maximum data rate with total transmitting power and corresponding to the difference between the transmitting power of DCH data transfer rate, and advances to step 409.In step 409, UE determines the E-DCH data transfer rate in the E-DCH maximum data rate.
As the result who determines in the step 403, when total transmitting power was less than or equal to transmitting power corresponding to the DCH data transfer rate of determining in the step 401, UE advanced to step 405.In step 405, consider the not fact of remaining available launch power, UE is defined as 0 with the E-DCH maximum data rate.Then, in step 409, UE does not send data by E-DCH.
As the result who determines in the step 402, when total transmitting power (comprising the DCH of distribution and the data transfer rate that maximum E-DCH, UE can send) during more than or equal to the transmit power limit value of UE, UE advances to step 406.
In step 406, the transmit power limit value of UE comparison UE and transmitting power corresponding to the DCH data transfer rate of determining in the step 401.When the transmit power limit value of UE greater than corresponding to the transmitting power of the DCH data transfer rate of determining in the step 401 time, UE advances to step 407.When the transmit power limit value of UE was less than or equal to transmitting power corresponding to the DCH data transfer rate of determining in the step 401, UE advanced to step 408.
In step 407, UE is defined as the E-DCH maximum data rate with the transmit power limit value and corresponding to the difference between the transmitting power of the determined DCH data transfer rate of UE.In step 409, UE determines the E-DCH data transfer rate in the E-DCH maximum data rate then.
The DCH data transfer rate can not be defined as surpassing the value of transmit power limit value.Therefore, need to regulate the transmitting power of DCH.Therefore, in step 408, UE DCH data transfer rate is set to ' transmit power limit value '.Then, UE advances to step 405.In step 405, consider the not fact of remaining available launch power, UE is defined as 0 with the E-DCH maximum data rate.Then, in step 409, UE does not send data by E-DCH.
In data transfer rate transmission data conditions, may need to retransmit E-DCH by the HARQ operation with DCH definite and E-DCH by said process.In this case, when not having DCH when when retransmitting, only having E-DCH, originally the power that was taken by DCH when having DCH can be added on the power of distributing to E-DCH, thereby total transmit power levels that UE generates can keep constant, and base station dispatcher can stably be worked.Promptly, be that the transmitting power Tx_power_E-DCH that E-DCH is provided with can be expressed as transmitting power Tx_power_E-DCH_init that in first the transmission E-DCH is used and the transmitting power Tx_power_DCH_init sum of in first the transmission DCH being used as the following formula shown in (2) when retransmitting:
Tx_power_E-DCH=Tx_power_E-DCH_init+Tx_power_DCH_init
……(2)
In addition, when only send E-DCH and DCH in first transmission is when generating when retransmitting E-DCH by HARQ, the transmitting power of the DCH that is generated is configured to have the value corresponding to the DCH data transfer rate, and will be made as the E-DCH transmitting power when retransmitting when sending for the first time by from being that the transmitting power that E-DCH distributes deducts the value that the DCH transmitting power obtains.Therefore, total transmit power levels of UE is identical when total transmit power levels of UE in retransmission can keep with first the transmission, and base station dispatcher can stably be worked.Promptly, be that the transmitting power Tx_power_E-DCH that E-DCH is provided with can be expressed as the poor of transmitting power Tx_power_E-DCH_init that in first the transmission E-DCH is used and the transmitting power Tx_power_DCH that distributes to the DCH that does not exist and occur in first the transmission when retransmitting when retransmitting, as the following formula shown in (3):
Tx_power_E-DCH=Tx_power_E-DCH_init-Tx_power_DCH
……(3)
By formula (2) and formula (3), be the formula (4) below transmitting power Tx_power_E-DCH that E-DCH is provided with may be summarized to be when retransmitting:
Tx_power_E-DCH=Tx_power_E-DCH_init+Δ_release-Δ_add
……(4)
In other words, be the transmitting power Tx_power_E-DCH that is provided with of E-DCH when retransmitting corresponding to by with excess power (Δ _ release) with when first the transmission to the transmitting power Tx_power_E-DCH_init addition of E-DCH use, then from this and deduct the transmitting power (value of Δ _ add) obtain.Here, excess power (Δ _ release) is meant when retransmitting owing to lack the power that DCH causes, and transmitting power (Δ _ add) be meant when first the transmission, do not exist but when retransmitting the channel transmitting power of the interpolation of appearance.
Foregoing description has been discussed the first transmission of E-DCH and the method that the E-DCH transmitting power is set of re-transmission considered.Yet, when the re-transmission of E-DCH is carried out more than once, can when carrying out extra re-transmission, determine the E-DCH transmitting power.For example, under the situation of carrying out maximum four re-transmissions, when in first and second times retransmit, having DCH but when not having DCH in retransmitting for the third time, perhaps in retransmitting for the first time, there is not DCH but when having DCH in retransmitting for the second time, can uses formula (4) that the transmitting power of E-DCH re-transmission is set.
In the above-described embodiments, the DCH transmitting power is reflected in the transmitting power of setting up the E-DCH re-transmission.Yet, according to another embodiment, can consider the E-DCH data transfer rate, in the scope of DCH transmitting power, adopt self adaptation to use.For example, when needs increase the transmitting power of E-DCH re-transmission, that is, when not existing DCH and E-DCH to have High Data Rate in E-DCH retransmits, all transmitting powers that are used for DCH all are applied to the transmitting power of setting up E-DCH.On the contrary, when E-DCH had low data rate, the transmitting power that part is used for DCH can be applied to the transmitting power of setting up E-DCH, perhaps can send E-DCH in the DCH transmitting power before keeping.
After UE had determined the data transfer rate of DCH and E-DCH, the corresponding transient transmission power of UE can increase.For example, when channel status descends, can come the transmitting power of instantaneous increase UE by the power control operation.Therefore, will be described below according to another embodiment of the present invention, wherein UE considers that transient transmission power and transmit power limit value determine the process of the transmitting power of DCH and E-DCH.
Fig. 5 illustrates according to the flow chart embodiment of the invention, determined the process of transmitting power by UE.
In step 501, UE determines whether ' corresponding to the transient transmission power summation of DCH and E-DCH data transfer rate ' surpasses UE ' transmit power limit value ', and the latter is the upper limit of emission power that the power amplifier of UE can allow.
As the result who determines, when ' corresponding to the transient transmission power summation of DCH and E-DCH data transfer rate ' do not surpass ' the transmit power limit value ' of UE, UE advanced to step 507, and UE does not regulate transmitting power in step 507.
As the result who determines, when summation surpassed the transmit power limit value, UE by giving the transmitting power that the DCH priority keeps DCH, and readjusted the transmitting power of E-DCH in step 503 in step 502.As a result, the operation relevant with DCH is subjected to the minimum that influences of E-DCH.Specifically, by the transmitting power of E-DCH being reduced poor between ' corresponding to the transient transmission power summation of DCH and E-DCH data transfer rate ' and ' transmit power limit value ', readjust the transmitting power of E-DCH.That is, UE reduces the part of whole transmitting powers of DCH and E-DCH above the transmit power limit value with the transmitting power of E-DCH.
In step 504, the E-DCH transmitting power after UE determine to regulate whether have on the occasion of.E-DCH transmitting power after regulating have on the occasion of the time, UE advances to step 505.In step 505, UE sends E-DCH with the data transfer rate corresponding to the E-DCH transmission power level after regulating.
As the result who determines in the step 504, the E-DCH transmitting power after regulating do not have on the occasion of the time, UE advances to step 506.Because the emission value can not have negative value, so UE does not send E-DCH in step 506.
Fig. 6 according to the embodiment of the invention, be used for the block diagram of structure of device of the scheduling assignment information of sending node B.
With reference to Fig. 6, base station dispatcher comprises scheduling signals transmit control device 601, scheduling signals maker 602 and scheduling signals transmitter 603.
Scheduling signals transmit control device 601 control scheduling signals maker 602 and scheduling signals transmitters 603, thus scheduling signals can be sent with predetermined dispatching cycle.
Fig. 7 is according to the block diagram of the device of the transmitting power of the embodiment of the invention, the data transfer rate that is used for definite UE and control UE.
With reference to Fig. 7, UE is from Node B receiving scheduling assignment information, and the scheduling assignment information that demodulation/decoding receives in scheduling assignment information demodulation/decoding unit 702, thereby obtains the scheduling assignment information.Here, the scheduling assignment information comprises at least one among aforesaid information No.1, information No.2, information No.3, information No.4 and the information No.5.
UE determines ' comprising that maximum DCH and U-DCH, UE can send data transfer rate (or transmitting power) ' according to the scheduling assignment information.Because the data transfer rate of DCH is to determine not considering under the situation whether E-DCH exists, so the data volume in the buffer area of 706 considerations ' comprising that maximum DCH and U-DCH, UE can send data transfer rate (or transmitting power) ' of DCH data transfer rate determiner, UE, current available TFCS, the ability of UE etc. are determined the DCH data transfer rate.The information that DCH data transfer rate determiner 706 receives about DCH data volume the buffer area of UE from DCH data buffer area 705, and use it so that determine the DCH data transfer rate.
When having determined the DCH data transfer rate, DCH transmit control device 707 is determined the DCH transformat, and applies it to DCH data transmitter 708.By the Dedicated Physical Control Channel (DPCCH) that is used to carry the DCH control information, will send to UE about the information of DCH transformat.DCH data transmitter 708 takes out the data of specified amount from DCH data buffer area 705 according to the DCH transformat, the data of taking out are carried out chnnel coding and modulation, send the data of channel coding and modulation then by physical channel-Dedicated Physical Data Channel (DPDCH).
Based on DCH data transfer rate of determining in ' comprising the data transfer rate (or transmitting power) that maximum DCH and U-DCH, UE can send ', the DCH data transfer rate determiner 706 (or transmitting power) and the data volume in the E-DCH data buffer area 701, determine the data transfer rate of E-DCH.Specifically, the E-DCH data transfer rate determine carry out according to the described process of reference Fig. 4.
When having determined the E-DCH data transfer rate, E-DCH transmit control device 704 is determined the E-DCH transformat, and applies it to E-DCH data transmitter 709.The Dedicated Physical Control Channel (E-DPCCH) of the enhancing by being used to carry the E-DCH control information sends the information about the E-DCH transformat.E-DCH data transmitter 709 takes out the data of specified amount from E-DCH data buffer area 701 according to the E-DCH transformat, the data of taking out are carried out chnnel coding and modulation, then the Dedicated Physical Data Channel (E-DPDCH) of physical channel-enhancings by the E-DCH data that send the channel coding and modulate.
Simultaneously, the transient transmission power of UE may be increased to even surpass ' the transmit power limit value ' that the power amplifier of UE can allow.In this case, transmitting power controller 710 is regulated each channel transmitting power, and the power that will multiply by the adjusting of gain factor is reflected to each channel, thereby the transient transmission power of UE is remained in ' transmit power limit value '.Then, when the transmitting power that keeps DCH was constant, UE reduced the part of whole transmitting powers of DCH and E-DCH above the transmit power limit value with the transmitting power of E-DCH.If even after the transmitting power that reduces E-DCH, the transient transmission power of UE still surpasses ' transmit power limit value ', and UE reduces E-DCH other channel transmitting power in addition in the same way so.
Information No.1 has only been discussed in top description.Yet, use information No.2 realizing also can having identical or equivalent effect aspect the object of the invention to information No.5.
According to the embodiment of the invention recited above, in the situation of using E-DCH, base station dispatcher can distribute wireless communication resources efficiently, and UE can select the data transfer rate of E-DCH and DCH efficiently.In addition, according to this embodiment of the invention, total total transmitting power of UE is identical when the transmitting power of UE in retransmission can keep with first the transmission, and no matter the existence of DCH whether, thereby can make the variation minimum of the interference volume that UE produces in up link.
In addition, use at the same time in the situation of E-DCH and DCH, when the instantaneous power deficiency occurring, can in the power that keeps DCH, readjust the power of E-DCH.
Although illustrate and described the present invention with reference to its specific embodiment, it will be understood by those skilled in the art that under the prerequisite of aim that does not deviate from claims qualification and scope, can carry out the various changes of form and details to it.
Claims (50)
1. the method for a scheduling uplink transfer of data in mobile communication system, this mobile communication system is by first channel and second channel support uplink packet data service, and the method comprising the steps of:
Determine the average data rate of first channel;
Based on total Radio Resource and poor corresponding between the Radio Resource of the average data rate of determined first channel, determine the maximum data rate of second channel; And
Send the scheduling assignment information of indicating determined maximum data rate to subscriber equipment (UE),
Wherein, second channel is dispatched, and first channel is not dispatched.
2. the method for claim 1, wherein the step of the maximum data rate of described definite second channel comprises step:
Difference between described each Radio Resource is set to distribute to the Radio Resource of second channel; And
Above when can distribute to the maximum wireless resource of second channel in the sub-district, determine the maximum data rate of the second channel of UE at the Radio Resource that prevents to distribute to second channel.
3. the method for claim 1, wherein provide and control total Radio Resource by radio network controller.
4. the method for claim 1, wherein the maximum data rate of each UE by will distributing to first channel multiply by corresponding optimizing scheduling coefficient, calculates the average data rate of first channel.
5. method as claimed in claim 4 wherein, is provided the maximum data rate and the optimizing scheduling coefficient of first channel by radio network controller.
6. method as claimed in claim 5, wherein, the optimizing scheduling coefficient is corresponding to the average data rate of first channel and the ratio of the maximum data rate of first channel.
7. the method for claim 1, wherein each Radio Resource is used corresponding to the rise-over-thermal (RoT) of uplink data rate or transmitting power and is represented.
8. the method for claim 1, wherein dispatching assignment information comprises: comprise the data transfer rate that maximum maximum data rate, UE of the data transfer rate of first channel and second channel can send.
9. the method for claim 1, wherein dispatch maximum data rate that assignment information comprises second channel and the optimizing scheduling coefficient of UE.
10. the method for claim 1, wherein dispatch assignment information and comprise the average data rate of first channel and the maximum data rate of second channel.
11. the method for claim 1, wherein dispatch the summation of the maximum data rate of maximum data rate that assignment information comprises first channel and second channel.
12. the method for claim 1, wherein dispatch the maximum data rate that assignment information comprises second channel.
13. the device of a scheduling uplink transfer of data in mobile communication system, this mobile communication system is by first channel and second channel support uplink packet data service, and this device comprises:
The scheduling signals maker, be used for determining that expection is used for the average data rate of first channel, based on total Radio Resource and poor corresponding between the Radio Resource of the average data rate of determined first channel, determine the maximum data rate of second channel, and generate the scheduling signals of the determined maximum data rate of indication;
The scheduling signals transmitter is used for sending the scheduling signals that is generated to subscriber equipment (UE); With
The scheduling signals transmission control unit (TCU) is used to control scheduling signals maker and scheduling signals transmitter, and making can be sending scheduling signals predetermined dispatching cycle,
Wherein, second channel is dispatched, and first channel is not dispatched.
14. device as claimed in claim 13, wherein, when having determined the maximum data rate of second channel, difference between described each Radio Resource is set to distribute to the Radio Resource of second channel, and above when can distribute to the maximum wireless resource of second channel in the sub-district, determine the maximum data rate of the second channel of UE at the Radio Resource that prevents to distribute to second channel.
15. device as claimed in claim 13 wherein, provides and controls total Radio Resource by radio network controller.
16. device as claimed in claim 13, wherein, the maximum data rate of each UE by will distributing to first channel multiply by corresponding optimizing scheduling coefficient, calculates the average data rate of first channel.
17. device as claimed in claim 16 wherein, is provided the maximum data rate and the optimizing scheduling coefficient of first channel by radio network controller.
18. device as claimed in claim 17, wherein, the optimizing scheduling coefficient is corresponding to the average data rate of first channel and the ratio of the maximum data rate of first channel.
19. device as claimed in claim 13, wherein, each Radio Resource is used corresponding to the rise-over-thermal of uplink data rate or transmitting power (RoT) and is represented.
20. device as claimed in claim 13, wherein, the scheduling assignment information comprises: comprise the data transfer rate that maximum maximum data rate, UE of the data transfer rate of first channel and second channel can send.
21. device as claimed in claim 13, wherein, the scheduling assignment information comprises the maximum data rate of second channel and the optimizing scheduling coefficient of UE.
22. device as claimed in claim 13, wherein, the scheduling assignment information comprises the average data rate of first channel and the maximum data rate of second channel.
23. device as claimed in claim 13, wherein, the scheduling assignment information comprises the summation of the maximum data rate of the maximum data rate of first channel and second channel.
24. device as claimed in claim 13, wherein, the scheduling assignment information comprises the maximum data rate of second channel.
25. a method that sends uplink data in the mobile communication system of support uplink packet data service, the method comprising the steps of:
Receive the scheduling assignment information of the maximum data rate of indication first channel and second channel;
Based on maximum data rate, determine the data transfer rate of first channel;
Poor based between the maximum data rate of first channel and the data transfer rate determined the data transfer rate of second channel; And
Use determined data transfer rate to send the uplink data of first channel and second channel,
Wherein, second channel is dispatched, and first channel is not dispatched.
26. method as claimed in claim 25 also comprises step: reduce transmitting power, surpass the transmit power limit value of UE so that prevent transmitting power corresponding to the data transfer rate of first channel and second channel corresponding to the data transfer rate of second channel.
27. method as claimed in claim 25, wherein, the step of the data transfer rate of described definite second channel comprises step:
When total transmitting power during, determine that total transmitting power is whether greater than first transmitting power corresponding to the data transfer rate of first channel less than the transmit power limit value;
When total transmitting power during, will be defined as the maximum data rate of second channel corresponding to the data transfer rate of the difference between the total transmitting power and first transmitting power greater than first transmitting power; And
In described maximum data rate, determine the data transfer rate of second channel.
28. method as claimed in claim 27 also comprises step: when total transmitting power is not more than first transmitting power, interrupt transmission by second channel.
29. method as claimed in claim 25, wherein, the step of the data transfer rate of described definite second channel comprises step:
When total transmitting power is not less than the transmit power limit value, determine that total transmitting power is whether greater than first transmitting power corresponding to the data transfer rate of first channel;
When total transmitting power during, will be defined as the maximum data rate of second channel corresponding to the data transfer rate of the difference between the total transmitting power and first transmitting power greater than first transmitting power; And
In described maximum data rate, determine the data transfer rate of second channel.
30. method as claimed in claim 29 also comprises step: when total transmitting power is not more than first transmitting power, interrupt transmission by second channel.
31. method as claimed in claim 25, wherein, scheduling assignment information indication is based on total Radio Resource and maximum data rate corresponding to the definite second channel of the difference between the Radio Resource of the average data rate of first channel, rather than the maximum data rate of first channel and second channel.
32. method as claimed in claim 25 wherein, in the step of described definite aggregate date rate, directly obtains aggregate date rate from the scheduling assignment information.
33. method as claimed in claim 25, wherein, in the step of described definite aggregate date rate, by from the scheduling assignment information, obtaining the maximum data rate of second channel and the optimizing scheduling coefficient of UE, the product addition of then maximum data rate of second channel and optimizing scheduling coefficient be multiply by the maximum data rate of first channel that receives from radio network controller and obtaining totalizes according to rate.
34. method as claimed in claim 33, wherein, the optimizing scheduling coefficient is corresponding to the average data rate of first channel and the ratio of the maximum data rate of first channel.
35. method as claimed in claim 25, wherein, in the step of described definite aggregate date rate, by from the scheduling assignment information, obtaining the average data rate of first channel and the maximum data rate of second channel, with the average data rate addition of the maximum data rate and first channel of second channel, totalize then according to rate.
36. method as claimed in claim 25 wherein, in the step of described definite aggregate date rate, obtains the summation of the maximum data rate of the maximum data rate of first channel and second channel, and this summation is made as aggregate date rate from the scheduling assignment information.
37. method as claimed in claim 25, wherein, in the step of described definite aggregate date rate, by from the scheduling assignment information, obtaining the maximum data rate of second channel, with the maximum data rate of second channel and based on maximum data rate addition, totalize then according to rate from the first definite channel of the transport format combination set (TFCS) of radio network controller reception.
38. a device that sends uplink data in the mobile communication system of support uplink packet data service, this device comprises:
Dispatch the assignment information receiver, be used to receive the scheduling assignment information of the maximum data rate of indicating first channel and second channel;
Controller is used for determining based on maximum data rate the data transfer rate of first channel, and poor based between the maximum data rate of first channel and the available data rate, determines the data transfer rate of second channel; With
Transmitter is used to use determined data transfer rate to send the uplink data of first channel and second channel,
Wherein, second channel is dispatched, and first channel is not dispatched.
39. device as claimed in claim 38, also comprise transmitting power controller, be used to reduce transmitting power, so that prevent to surpass the transmit power limit value of UE corresponding to the transmitting power of the data transfer rate of first channel and second channel corresponding to the data transfer rate of second channel.
40. device as claimed in claim 38, wherein second channel data transfer rate controller is carried out following operation:
When total transmitting power during, determine that total transmitting power is whether greater than first transmitting power corresponding to the data transfer rate of first channel less than the transmit power limit value;
When total transmitting power during, will be defined as the maximum data rate of second channel corresponding to the data transfer rate of the difference between the total transmitting power and first transmitting power greater than first transmitting power; And
In described maximum data rate, determine the data transfer rate of second channel.
41. device as claimed in claim 40, wherein, when total transmitting power was not more than first transmitting power, second channel data transfer rate controller interrupted the transmission by second channel.
42. device as claimed in claim 38, wherein, second channel data transfer rate controller is carried out following operation:
When total transmitting power is not less than the transmit power limit value, determine that total transmitting power is whether greater than first transmitting power corresponding to the data transfer rate of first channel;
When total transmitting power during, will be defined as the maximum data rate of second channel corresponding to the data transfer rate of the difference between the total transmitting power and first transmitting power greater than first transmitting power; And
In described maximum data rate, determine the data transfer rate of second channel.
43. device as claimed in claim 42, wherein, when total transmitting power was not more than first transmitting power, second channel data transfer rate controller interrupted the transmission by second channel.
44. device as claimed in claim 38, wherein, scheduling assignment information indication is based on total Radio Resource and maximum data rate corresponding to the definite second channel of the difference between the Radio Resource of the average data rate of first channel, rather than the maximum data rate of first channel and second channel.
45. device as claimed in claim 38, wherein, scheduling assignment information receiver directly obtains aggregate date rate from the scheduling assignment information.
46. device as claimed in claim 38, wherein, scheduling assignment information receiver is by obtaining the maximum data rate of second channel and the optimizing scheduling coefficient of UE from the scheduling assignment information, the product addition of then maximum data rate of second channel and optimizing scheduling coefficient be multiply by the maximum data rate of first channel that receives from radio network controller and obtaining totalizes according to rate.
47. device as claimed in claim 38, wherein, the optimizing scheduling coefficient is corresponding to the average data rate of first channel and the ratio of the maximum data rate of first channel.
48. device as claimed in claim 38, wherein, scheduling assignment information receiver is by obtaining the average data rate of first channel and the maximum data rate of second channel from the scheduling assignment information, with the average data rate addition of the maximum data rate and first channel of second channel, totalize then according to rate.
49. device as claimed in claim 38, wherein, scheduling assignment information receiver obtains the summation of the maximum data rate of the maximum data rate of first channel and second channel from the scheduling assignment information, and this summation is made as aggregate date rate.
50. device as claimed in claim 38, wherein, scheduling assignment information receiver is by obtaining the maximum data rate of second channel from the scheduling assignment information, with the maximum data rate of second channel and based on maximum data rate addition, totalize then according to rate from the first definite channel of the transport format combination set (TFCS) of radio network controller reception.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101400081B (en) * | 2007-09-28 | 2010-06-02 | 大唐移动通信设备有限公司 | Uplink scheduling method, system and device in TDD system |
CN110087317A (en) * | 2007-09-28 | 2019-08-02 | 无线创新信号信任公司 | WTRU, WTRU execution method, base station execution method and device |
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ATE437546T1 (en) * | 2005-02-09 | 2009-08-15 | Ntt Docomo Inc | UPLINK RADIO RESOURCE OCCUPANCY METHOD, RADIO BASE STATION, AND RADIO NETWORK CONTROL |
KR100695083B1 (en) * | 2005-04-25 | 2007-03-14 | 에스케이 텔레콤주식회사 | System and Method for Processing Virtual Scrambling Using Scrambling Flag, and Terminal Having Virtual Scrambling Processing Module |
KR100951738B1 (en) * | 2007-11-07 | 2010-04-08 | 엘지노텔 주식회사 | Method for allocating radio resource in high-speed packet data communication system |
WO2012115428A2 (en) | 2011-02-21 | 2012-08-30 | Samsung Electronics Co., Ltd. | Transmit power control method and apparatus |
KR20130022182A (en) | 2011-08-25 | 2013-03-06 | 삼성전자주식회사 | Apparatus and method for transmitting and receiving data according to connection priority between a device to a device in a near field communication system |
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2004
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101400081B (en) * | 2007-09-28 | 2010-06-02 | 大唐移动通信设备有限公司 | Uplink scheduling method, system and device in TDD system |
CN110087317A (en) * | 2007-09-28 | 2019-08-02 | 无线创新信号信任公司 | WTRU, WTRU execution method, base station execution method and device |
CN110087317B (en) * | 2007-09-28 | 2021-01-05 | 无线创新信号信任公司 | WTRU, WTRU execution method, base station execution method and device |
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