CN1777332A - Method and apparatus for scheduling uplink data transmission for mobile station in soft handover region - Google Patents

Method and apparatus for scheduling uplink data transmission for mobile station in soft handover region Download PDF

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Publication number
CN1777332A
CN1777332A CNA2005101315851A CN200510131585A CN1777332A CN 1777332 A CN1777332 A CN 1777332A CN A2005101315851 A CNA2005101315851 A CN A2005101315851A CN 200510131585 A CN200510131585 A CN 200510131585A CN 1777332 A CN1777332 A CN 1777332A
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uplink data
node
uplink
serving node
data rate
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郭龙准
许允亨
李周镐
赵俊暎
金泳范
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and apparatus for scheduling uplink data transmission for a UE in a mobile communication system supporting an uplink packet data service are provided. A serving Node B and at least one non-serving Node B are included in an active set of a UE located in a soft handover region. The UE receives a dedicated scheduling grant from the serving Node B by dedicated scheduling and a common scheduling grant from the at least one non-serving Node B, controls an uplink data rate not to exceed a previous uplink data rate during a predetermined validity duration, if the common scheduling grant indicates a rate-down, and transmits uplink data at the controlled uplink data rate.

Description

Method and apparatus for the travelling carriage scheduling uplink transfer of data of soft handover area
Technical field
The present invention relates generally to asynchronous wide-band code division multiple access (WCDMA) communication.Especially, the present invention relates to method and apparatus about the effective scheduling uplink transmitted in packets of the travelling carriage in the soft handover area.
Background technology
Use provides the unified service of transmitting packet-based text, digitize voice and video and multi-medium data with 2Mbps or above speed based on 3-G (Generation Three mobile communication system), the universal mobile telecommunications service (UMTS) of the WCDMA of global mobile communication (GSM) system in Europe to mobile subscriber or computer user, and no matter they are in which position in the world.Along with the introducing of virtual access notion, the UMTS system allows to be linked into all the time any one terminal in the network.This virtual access is called packet switching and inserts, and it uses such as the such packet oriented protocol of Internet protocol (IP).
Fig. 1 shows the configuration of the UMTS Terrestrial radio access network network (UTRAN) of traditional UMTS system.
Referring to Fig. 1, UTRAN12 comprises radio network controller (RNC) 16a and 16b and Node B 18a to 18d, and connects subscriber equipment (UE) 20 to core net (CN) 10.A plurality of sub-districts are as the basis of Node B 18a to 18d.The Node B of each RNC 16a or 16b control below it, and the sub-district of each Node B control below it.RNC and Node B and sub-district under RNC control form RNS (RNS) 14a or 14b jointly.
RNC 16a and 16b distribute separately or managing radio resources to their control under Node B 18a to 18d, Node B 18a plays the actual effect that Radio Resource is provided to 18d.Radio Resource is based on that the sub-district disposes, and this Radio Resource that is provided to 18d by Node B 18a relates to the Radio Resource of the sub-district of their management.UE sets up wireless channel communication, the Radio Resource that this channel uses the specific cell below the specific Node B to provide is provided.From the angle of UE, Node B 18a is insignificant to the difference between the sub-district of 18d and their control, and 20 processing of this UE are based on the physical layer of cell configuration.Therefore, term " Node B " and " sub-district " here can be used alternatingly.
Between UE and RNC, defined the Uu interface.The layered protocol architecture at this Uu interface will be described in detail in Fig. 2.This interface is divided into control plane (C-plane) 30 that is used for exchange control signal between UE and RNC and the user plane (U-plane) 32 that is used to send real data.
Referring to Fig. 2, Radio Resource control (RRC) layer 32, Radio Link control (RLC) layer 40, medium access control (MAC) layer 42 and physics (PHY) layer 44 are defined within on the C-plane 30.Packet data control agreement (PDCP) layer 36, broadcast/group broadcast control (BMC) layer 38, rlc layer 40, MAC layer 42 and PHY layer 44 are defined within U-plane 32.This PHY layer 44 is arranged in each sub-district and MAC layer 42 is configured in each RNC usually to rrc layer 34.
PHY layer 44 provides information transfer service by Radio Transmission Technology, and is consistent with layer 1 (L1) in open system interconnection (OSI) (OSI) model.PHY layer 44 is connected to MAC layer 42 by transmission channel.Mapping relations between transmission channel and the physical channel are according to how deal with data is determined in PHY layer 44.
MAC layer 42 is connected to rlc layer 40 by logic channel.MAC layer 42 is delivered to PHY layer 44 to the data from rlc layer 40 that receive on logic channel on suitable transmission channel, and the data from PHY layer 44 that receive on transmission channel, be delivered to rlc layer 40 on suitable logic channel.MAC layer 42 inserts additional information or the insertion data of explanation from the data that logic channel receives, and the control arbitrary access.In MAC layer 42, the part relevant with the U-plane is called MAC-data (MAC-d), and the part relevant with the C-plane is called MAC-control (MAC-c).
The foundation and the release of rlc layer 40 control logic channels.Rlc layer 40 is with the operation of the pattern of affirmation mode (AM), negative mode (UM) and transparent mode (TM) thrin, and provides different functional in these patterns.Typically, rlc layer 40 is cut apart the Service Data Units (SDU) that receive from last layer or is connected into suitable size and error correction.
PDCP layer 36 is arranged on the rlc layer 40 on U-plane 32.This PDCP layer 36 is responsible for the datagram header of compression and decompression with the form transmission of IP grouping, and under the reformed situation of Serving RNC that the mobility owing to UE causes, guarantees the integrality of transfer of data.
The characteristic that connects the transmission channel of PHY layer 44 and last layer depends on transformat (TF), this formal definition the processing of PHY layer, comprise the convolution chnnel coding, interweave and the rate-matched of specific transactions.
Especially, in order further to improve the packet transmitting performance of the up link from UE to the Node B, the UMTS system uses enhanced uplink dedicated channel (E-DCH).In order to guarantee more reliable high speed data transfer, E-DCH utilizes the scheduling that mixes automatic repeat requests (HARQ) and Node B-control.
Fig. 3 conceptually illustrates by the typical data transmission of Radio Link on E-DCH.The Node B of E-DCH 111 to 114 is supported in Reference numeral 100 indications, and Reference numeral 101 to 104 indications send the UE of E-DCH 111 to 114.
Referring to Fig. 3, Node B 100 is estimated the channel status of UE 101 to 104, and dispatches its uplink data transmission based on this channel status.In order to improve total systematic function, this scheduling is carried out like this, and promptly the tolerance of noise incremental quantity can not surpass the target noise increment in Node B 100.Therefore, Node B 100 distributes low data rate to give long-range UE 104, and distributes high data rate to give short range UE 101.
Fig. 4 is the figure that diagram is used for the classical signal flow process of the message transmission/reception on E-DCH.
Referring to Fig. 4, in step 202, Node B and UE set up E-DCH.Step 202 is included in the transmission of messages on the dedicated transmission channel.In step 204, UE sends schedule information to Node B.This schedule information can comprise uplink channel state information, i.e. the transmitted power of UE and dump power, and the data cached total amount that will be sent to Node B.
In step 206, the Node B monitoring comes the transmission for single UE scheduling uplink data from the schedule information that a plurality of UE transmit.In step 208, Node B decision approval is dispatched assignment information to this UE from uplink packet transmission and the transmission of UE.This scheduling assignment information is absolute permission (AG) (maximum data rate that indication is allowed) or relative grant (RG) (the indication maximum data rate of allowing changes with respect to increase/reduction/nothing of previous maximum data rate of allowing).This AG or RG be by sending at the dedicated signaling of each UE, or sent by the general signaling at all UE in one or more UE groups or the sub-district.
In step 210, UE determines at the TF of the maximum data rate that allows with interior E-DCH based on the scheduling assignment information.Then, in step 212 and 214, UE sends this TF information to Node B, sends uplink packet simultaneously on E-DCH.In step 216, Node B determines whether TFRI and system for uplink packet data be wrong.In step 218, when mistake occurring for one in TFRI and the system for uplink packet data, Node B sends confirms (ACK) signal to UE, otherwise when mistake did not appear in the both, Node B sent Negative Acknowledgement (NACK) signal to UE.
In the previous case, transmission of packet data has been finished and UE sends new grouped data to Node B on E-DCH.On the contrary, in the later case, UE retransmits identical grouped data to Node B on E-DCH.
This E-DCH has the essential characteristic of dedicated channel, because it is to be developed the packet transmitting performance that is used for improving transmission channel.One of them feature is to support soft handover.That is, UE can receive the downlink information that all Node B from active set transmit in soft handover area.Therefore, the Node B receiving scheduling assignment information of UE from active set is to send E-DCH.Because the scheduling assignment information that receives from each Node B may be different, so UE does not need to determine whether to use different scheduling assignment information to send E-DCH.
As mentioned above, in the communication system of traditional support E-DCH, all Node B in the active set send the scheduling assignment information to the UE in soft handover area, are used for the uplink data transmission scheduling.Therefore, producing expense aspect downlink channel coding resource or the transmitted power, and receiving the UE of a large amount of scheduling assignment information, be difficult to determine that E-DCH sends.
Summary of the invention
The present invention is directed to the problems referred to above and/or defective at least, following at least advantage is provided.Thereby, the object of the present invention is to provide method and apparatus, be used for dispatching effectively about the UEE-DCH in the soft handover area and transmit in mobile communication system.
The invention provides method and apparatus, be used for effective scheduling uplink transfer of data, and consider the non-serving node B in the active set about the UE of soft handover area.
The invention provides method and apparatus, be used for being positioned at the UE of soft handover area, the scheduling assignment information of using the Node B from active set to receive is uplink packet transmission specified data speed.
The invention provides method and apparatus, be used for receiving from RNC the information of effective duration of indication, the scheduling assignment information that transmits from non-serving node B in this effective duration is effective at the UE that is arranged in soft handover area.
The invention provides method and apparatus, be used for receiving from RNC the information of effective duration of indication, is effective from the serving node B of scheduling assignment information under soft handover area covers that non-serving node B transmits in this effective duration.
The present invention can typically implement to be used to the method and apparatus of UE scheduling uplink transfer of data to realize by in the communication system of support uplink grouped data.
According to an exemplary realization of the present invention, in the UE of the mobile communication system of support uplink Packet data service in the method for scheduling uplink transfer of data, in soft handover with serving node B and at least one non-serving node B communication period, this UE receives the specific schedule permission by specific schedule from serving node B, and receives general scheduling grant from least one non-serving node B.If this general scheduling grant shows that speed descends, then UE is no more than previous uplink data rate at predetermined effective duration control uplink data rate, and sends uplink data with the uplink data rate of being controlled.
According to another exemplary realization of the present invention, be in the method for the UE scheduling uplink transfer of data in the Node B in the mobile communication system of support uplink Packet data service, this Node B sends specific schedule by specific schedule and permits the UE that is arranged in soft handover area, and receives the uplink data that transmits from UE after sending the specific schedule permission.If the data rate of the uplink data that receives is lower than the data rate of appointment in the specific schedule permission, then at predetermined effective duration, this Node B control uplink data rate is no more than previous uplink data rate, and the specific schedule of transmission indication control uplink data rate is permitted to UE.
Another exemplary realization according to the present invention, the mobile communication system that is used in the support uplink Packet data service is in the device of UE scheduling uplink transfer of data, has a serving node B and at least one the non-serving node B relevant with soft handover area.The UE that is arranged in soft handover area receives the specific schedule permission by specific schedule from serving node B, and receive general scheduling grant from least one non-serving node B, if general scheduling grant indicated speed descends, then control uplink data rate and be no more than previous uplink data rate, and send uplink data with in check uplink data rate at predetermined effective duration.
Description of drawings
The feature and advantage of exemplary realization of the present invention are clearer in the detailed description with the accompanying drawing below, it will be appreciated that, and identical identical part, element and the structure of Reference numeral indication, wherein:
Fig. 1 illustrates the configuration of the UTRAN in the typical UMTS system;
Fig. 2 illustrates the layered architecture that is defined in the interface between UE and the RNC;
Fig. 3 illustrates the traditional E-DCH transmission via Radio Link;
Fig. 4 is the figure that diagram is used for the classical signal flow process of the message transmission/reception on E-DCH.
Fig. 5 diagram according to the exemplary realization of embodiment information, to the scheduling of the UE that is positioned at soft handover area;
Fig. 6 is the exemplary according to an embodiment of the invention realization of diagram, be used for the figure of the signaling of the effective duration information of transmission/reception between RNC and UE;
Fig. 7 is the exemplary according to an embodiment of the invention realization of diagram, send the flow chart of the operation of uplink data based on the effective duration information among the UE;
Fig. 8 is diagram another exemplary realization according to an embodiment of the invention, send the flow chart of the operation of uplink data based on the effective duration information among the UE;
Fig. 9 is diagram according to the 3rd exemplary realization of the present invention, is used for the figure of the signaling of the effective duration information of transmission/reception between RNC and Node B.
Figure 10 is diagram according to the 3rd exemplary realization of the present invention, the flow chart of scheduling operation in the Node B that has received an effective duration information; And
Figure 11 be exemplary realization according to an embodiment of the invention, be used for TTI according to the UE of soft handover area and determine the transmitting continuous time of overload bit and the effective figure of the signal flow of duration and related system operation.
Embodiment
The exemplary realization of specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.In the following description, for brevity, known function and structure will no longer be described.
One aspect of the present invention is for being positioned at the UE scheduling uplink transfer of data of soft handover area, and purpose is that the enhanced uplink Packet data service is provided in mobile communication system.
According to an aspect of the present invention, be positioned at the UE of soft handover area, the non-master scheduling Node B (or non-service node) that is used to the master scheduling Node B (or service node) of this UE and other UE scheduling uplink packet data transmission and is different from the serving node B that is included in active set involves the uplink data transmission scheduling.This UE sends system for uplink packet data based on the scheduling assignment information from host node B and the reception of non-serving node B in soft handover area.
As mentioned above, be positioned at the UE of soft handover area by the related signaling of scheduling, from serving node B and one or more non-serving node B receiving scheduling assignment information.This host node B and non-serving node B with different modes to the UE operation dispatching.Especially, serving node B goes up in dedicated channel (being dedicated signaling) and sends the scheduling assignment information to UE, but not service node is gone up transmission scheduling assignment information to UE at common signal channel (being common signaling).The scheduling of dedicated signaling and common signaling will be described in detail later.
Fig. 5 illustrate according to the exemplary realization of embodiment information, at the scheduling of the UE that is positioned at soft handover area.
Referring to Fig. 5, first and second UE 504 and 505 (UE 1 and UE 2) are positioned at soft handover area.UE 1 management comprises the active set of first and second Node B 501 and 502 (Node B 1 and Node B 2).Node B 1 is the serving node B that is used for UE 1.UE 2 management comprise the active set of the second and the 3rd Node B 502 and 503 (Node B 2 and Node B 3).Node B 3 is the serving node B that are used for UE 2.
Node B 1, Node B 2 and Node B 3 are UE 1 and UE 2 scheduling uplink transfer of data according to the state of UE.In order to reach this purpose, UE 1 and UE 2 send their UE state information in up link.This UE state information goes up transmission in enhanced dedicated physical data channel (E-DPDCH), no matter whether there is system for uplink packet data, E-DCH is mapped on this E-DPDCH, and in upward transmission of enhancement mode Dedicated Physical Control Channel (E-DPCCH), and E-DPCCH carries the control information of E-DCH when having system for uplink packet data.
The UE state information of E-DPDCH is that buffer memory takies (BO) information and transmitted power state (TPS) information.Node B in the MAC-e protocol Data Unit (PDU) that this BO and TPS information can send at E-DCH, that is, and by the MAC-e signaling.
When having system for uplink packet data, the UE state information of transmitting on E-DPCCH is a rate request.The power that this E-DPCCH also carries transformat sign (TFI), re-transmission sequence number, service quality (QoS) and E-DPDCH data strengthens information.
This rate request is by one or more bit representations.The request of UE through-rate is to the data rate of the next transmission of serving node B request data.For example, suppose that 1 usefulness is request of data, if the rate request position is " 1 ", then its indicated speed increases.If the rate request position is " 0 ", then its indication does not have speed to increase.In the previous case, UE is the node B scheduling device request higher data rate of next E-DCH transmission to serving node B.In the later case, UE is satisfied with current data rate.
Whether Node B 1, Node B 2 and Node B 3 decisions agree uplink data transmission in next Transmission Time Interval (TTI), in addition maximum data rate and the available radio resources that also allows based on the UE state information decision from UE 1 and UE 2 receptions.Then, the maximum data rate that Node B 1 and Node B 3 allow by dedicated signaling notice UE 1 and UE 2, on the contrary Node B 2 is by general dispatch notification UE 1 and UE 2 scheduling result.If the no good cake of uplink resource state of the sub-district under Node B covers, then Node B notice UE 1 and UE 2 uplink resources transship.That is, Node B 2 transmission rates descend order to UE 1 and UE 2, and wherein Node B 2 is set to non-serving node B.
Node B 1 sends the specific schedule permission 506 to UE 1 of indicating the maximum data rate that allows, and Node B 3 also sends the specific schedule permission 507 to UE 2 of the maximum data rate of indication permission.On the other hand, Node B 2 sends general scheduling grant 508 to UE 1 and UE 2, and wherein Node B 2 is non-serving node B.General scheduling grant 508 shows that the general speed to UE 1 and UE 2 changes.Therefore, UE 1 and UE 2 based on this specific schedule permission 506 or 507 and general scheduling grant 508 determine the TF of an E-DCH respectively, and on E-DPDCH and E-DPCCH, send the TF information of uplink data and this uplink data.
Like this, be arranged in the UE of soft handover area on E-DPCCH or by the Node B of its UE state information of MAC-e signaling transmission to its active set.Then, Node B is this UE scheduling uplink transfer of data based on the state information of this UE.This UE determines the TF of E-DCH based on specific schedule permission that receives from serving node B and the general scheduling grant that receives from non-serving node B.
Below the description exemplary realization of having illustrated certain specific embodiments of the present invention, relate to as UE and receive general scheduling grant and when service node receives the specific schedule permission, the processing of general scheduling grant from least one non-serving node B.
First specific embodiment
The UE that is positioned at soft handover area receives the specific schedule permission from serving node B, and from the overload bit of non-serving node B reception as general scheduling grant.If this overload bit is " 0 ", then this UE is based on the definite uplink data rate of specific schedule permission.If overload bit is " 1 ", then UE does not increase uplink data rate at predetermined effective duration.
That is to say that the UE from non-serving node B reception overload bit considers overload bit earlier, rather than, operate based on the specific schedule permission that receives from serving node B.Or rather, UE not rate request position is set to " increase ", surpasses current TTI with the uplink rate that stops next TTI.The rate request position is assumed to be effective duration of not being arranged to " increase " to be fixed value or to be notified by RNC.
Fig. 6 is diagram according to one exemplary embodiment of the present invention, is used for the figure of the signaling of the effective duration information of transmission/reception between RNC and UE.
Referring to Fig. 6, RNC 603 sends effective duration information 604 by Node B 602 to UE 601, and this information indication is by effective duration of the overload bit of non-main node B setting.That is, RNC 603 sends effective duration information 604 to UE 601, and UE 601 receives 1 overload bit from the non-serving node B of active set, thereby allows at the limited operation of effective duration to UE 601.
Effectively duration information 604 is delivered to UE 601 by Radio Resource control (RRC) signaling.This UE 601 is positioned at a soft handover area, and obtains to be set to effective duration of 1 overload bit from effective duration information 604.This effective duration information 604 can be different for each UE, perhaps according to each non-serving node B and difference.According to an exemplary realization of the present invention, effective duration information 604 is that QoS, current data speed or the UE state information according to uplink data determined.
As mentioned above, for the overload bit that is set to 1, UE 601 limits its operation, rather than sends uplink data with iptimum speed.This limited operation will be described in conjunction with Fig. 7.
Fig. 7 is the exemplary according to an embodiment of the invention realization of diagram, determine the flow chart of the operation of uplink data based on the effective duration information among the UE.
Referring to Fig. 7, in step 701, positioning UE in soft handover area, and in step 702, receive the effective duration information that is associated with the overload bit that is provided with by non-main signaling node B from RNC by the RRC signaling.According to another exemplary realization of the present invention, UE can read predetermined effective duration information from its internal storage.In step 703, UE receives the specific schedule permission from serving node B, and receives overload bit as general scheduling grant from non-serving node B.
In step 704, UE determines whether this overload bit is set to 1.If overload bit is 1, then be set to effective duration VD according to effective duration information timer T, and activate this timer T at this UE of step 705, enter step 706 then.This effective duration is the multiple of E-DCH TTI.At effective duration, the uplink resource of non-serving node B has obtained fully effectively utilizing.On the other hand, if overload bit is not 1, then represent not overload of non-serving node B, UE jumps to step 706.
In step 706, UE determines that whether the value T of timer is greater than 0.If T is greater than 0, then UE subtracts 1 with the value of T in step 707, and sends uplink data with predetermined method on E-DCH in step 709.In more detail, the data rate of this E-DCH is set to be lower than rank of E-DCH speed of previous TTI, or is controlled as the more uplink resources that do not take non-serving node B.Because UE knows that the uplink resource of non-serving node B is in overload, therefore in step 709, it is provided with this E-DCH speed and is no more than last E-DCH speed.The data rate of last E-DCH speed when receiving overload bit is relevant.
Still in step 709, UE sends the TF information of uplink data on the E-DPCCH of the control information that is designed to carry the E-DCH association.Here, UE ignores other state information, and unconditionally the rate request position is set to be different from the numerical value of " increase " on E-DPCCH.The rate request position is set for not having " increase " value in all UE or according to the priority of UE or according to the generation that is provided with of RNC.This effective duration can be used to limit the MAC-e signaling.Although the MAC-e signaling makes serving node B can distribute more resources to give specific UE, other UE is got rid of from equal resource, thereby has reduced systematic function.Therefore, the MAC-e signaling can be restricted to UE at effective duration.
On the contrary, if T equals 0 in step 706, then in step 710, permission sends uplink data to UE on E-DCH according to specific schedule.When definite E-DCH speed, UE only uses the specific schedule permission and ignores overload bit.This UE also is set to " increase " or non-" increase " value according to the rate request position of its state E-DPCCH.
According to one exemplary embodiment of the present invention, the non-serving node B in the active set sends overload bit as the general scheduling grant to the UE that is positioned at soft handover area.Serving node B distributes uplink resource to give UE by the specific schedule permission.Then, UE under the situation of the uplink resource of considering non-serving node B, selects E-DCH speed according to effective duration information relevant with overload bit, and sends uplink data with this selected E-DCH speed.
Second specific embodiment
The UE that is positioned at soft handover area receives overload bit as general scheduling grant from non-serving node B, and receives the specific schedule permission from serving node B, is used to distribute uplink resource.If overload bit is not 0, then UE is to send first or retransmit to distribute uplink resource according to current uplink data.If non-serving node B is transshipped, and uplink data is to send first, and then UE ignores this specific schedule permission, and it is non-" increase " value that the rate request position is set.
Fig. 8 be diagram according to another exemplary embodiment of the present invention, send the operation of uplink data based on the effective duration information among the UE.UE considers that uplink data is to send or retransmit the data rate that decides uplink data first.
Referring to Fig. 8, in step 801, positioning UE in soft handover area.In step 802, UE receives the specific schedule permission from serving node B, and from the overload bit of non-serving node B reception as general scheduling grant, this host node B and non-serving node B belong to the active set of UE.
In step 803, UE determines whether overload bit is 1, and it indicates the uplink resource of non-serving node B whether to transship.If overload bit is 1, then in step 804, UE is not " increase " for next E-DCH transmission is provided with the rate request position in E-DPCCH.When the next E-DCH of dispatch service Node B transmission,, will alleviate the overload of the uplink resource in the non-serving node B to the limited distribution of the uplink resource of UE.On the other hand, if overload bit is not 1 in step 803, then UE jumps to step 806.In step 805, it is 1 to wait first transmission that UE is provided with the initial transmission label.
In step 806, under the situation that sends current uplink data first, this UE determines whether the initial transmission label is 1.If satisfy the condition of step 806, then ignore the specific schedule permission at this UE of step 807, on E-DCH, send uplink data with predetermined method.This preordering method can be that the speed of for example uplink data obtains by reducing one-level from last data rate, or remain last data speed, so that exceed the uplink resource that uses non-service node B.
On the contrary, if the condition of step 806 does not satisfy, then in step 808, it is 0 that UE is provided with the initial transmission label, and ignores overload bit in step 809, and permission sends uplink data on E-DCH based on specific schedule.That is, the E-DCH data rate is determined according to the specific schedule permission.And the rate request position of E-DPCCH can be provided with according to the state of this UE.
The 3rd specific embodiment
Positioning UE in soft handover area.This UE receives overload bit as general scheduling grant from the non-serving node B of active set, and receives the specific schedule permission from the serving node B of active set.
If overload bit is 0, then permission distributes uplink resource to this UE based on specific schedule.If overload bit is 1, then this UE operates with following limited manner.
Transship because overload bit is the non-serving node B of 1 indication, be non-" increase " value so this UE is provided with the rate request position, and operate the transmission first that arrives the earliest with predetermined method.For example, UE uses the data rate than the low one-level of the specific schedule admission rate that allows, or hangs down the speed of one-level than last data speed.
According to the 3rd one exemplary embodiment of the present invention, effective duration of RNC notification service Node B overload bit, and serving node B is used the data rate that hangs down one-level than the specific schedule admission rate that allows at effective duration control UE.Like this, at effective duration, consider the state of UE, less relatively uplink resource is assigned to UE.
Fig. 9 is the figure exemplary realization, that be used for RNC and Node B between the signaling of transmission/reception effective duration information of diagram according to the 3rd one exemplary embodiment of the present invention.
Referring to Fig. 9, RNC 902 sends effective duration information 903 of effective duration of indicating the overload bit that is provided with by non-serving node B to serving node B 901.This effective duration information 903 is transmitted by Node B application protocol (NBAP) signaling.If RNC 902 is not the inclined to one side RNC of working control serving node B 901, then this effective duration information 903 is transmitted by RNSAP signaling and NBAP signaling.
This effective duration information may be different for each UE, or according to each non-serving node B and difference.Another exemplary realization according to an embodiment of the invention, effectively duration information 903 decides according to the UE state information of QoS, current data speed and UE.When UE comprises the non-serving node B of active set, or when effective duration changed, this effective duration information 903 can be sent out.
Figure 10 is diagram according to the 3rd one exemplary embodiment of the present invention, the flow chart of scheduling operation in the serving node B that has received effective duration information.
Referring to Figure 10, in step 1001, serving node B receives the effective duration information relevant with an overload bit from RNC, and described overload bit is the UE that is used for being dispatched and being positioned at by serving node B soft handover area.In another situation, serving node B reads predetermined effective duration information from its internal storage.In step 1002, serving node B sends specific schedule and permits UE, and in step 1003, on E-DCH from UE receiving uplink data.
In step 1004, this serving node B comparison is by the data rate of specific schedule permission data rate that distributes and the uplink data that receives.If employed data rate is lower than the data rate that is distributed, then in step 1005, serving node B thinks that UE is set to 1 overload bit from receiving near the non-serving node B of serving node B.
In step 1006, serving node B timer T is set to effective duration VD of being provided with in effective duration information, and activates this timer.In step 1007, serving node B determines that whether the value T of timer is greater than 0.If T is greater than 0, then serving node B subtracts 1 with the value of T in step 1008, and in step 1009, considers the overload of non-serving node B, with respect to other UE, distributes a small amount of uplink resource to give UE.If T equals 0, then serving node B distributes the best uplink resource to give UE,, guarantees high as far as possible data rate in step 1011 for UE that is.
To be described in the scheduling under the situation that has a plurality of UE to use different TTI in the soft handover area below.
Be useful for the UE of a plurality of reception overload bit is provided with equal effective duration as far as possible.For the UE that uses 2 microsecond TTI with use the UE of 10 microsecond TTI to be present in the situation of soft handover area simultaneously, need be set identical effective duration for these UE.
All use 2 microsecond TTI if be positioned at all UE of soft handover area, then be provided with based on 2 microseconds between the transmission period of overload bit, and effectively the duration also is provided with based on 2 microseconds.On the other hand, if some UE uses 2 microsecond TTI and other UE uses 10 microsecond TTI in the soft handover area, then they receive common overload bit from the Node B as the non-serving node B the soft handover area.Because overload bit can use different TTI to send to UE at different time, so this UE must be provided with new overload bit time of reception.Effective duration of this overload bit also must be reset.
In an exemplary realization of the embodiment of the invention, for the UE of UE that uses 2 microsecond TTI and use 10 microsecond TTI, overload bit all sends with 10 microseconds, so that this overload bit transmission can be general to them.Therefore, effective duration is set to the multiple of 10 microseconds.
Can be that UE in the soft handover area is provided with transmitting continuous time of overload bit and effective duration with several different methods.
According to an exemplary realization, the transmitting continuous time of overload bit is set to 10 microseconds all the time, and is indifferent to the difference of 2 microseconds and 10 microsecond TTI.Therefore, effectively the duration is the multiple of 10 microseconds.Even all UE in the soft handover area use 2 microsecond TTI, overload bit still sends to them with 10 microseconds.
According to another exemplary realization, RNC determines the TTI of each UE in the soft handover area, and the Node B that the transmitting continuous time announcement of overload bit is relevant with UE and soft handover area.
Figure 11 is the exemplary according to an embodiment of the invention realization of diagram, is used for using different TTI to send the figure of effective duration information to the signal flow of UE in soft handover area.Though show a Node B relevant with soft handover area 1102 and a UE 1101 who is arranged in soft handover area, same principle can be applied to other Node B and the UE that does not illustrate here.The information that UE 1101 and Node B 1102 receive about the transmitting continuous time of overload bit from RNC 1103 by RRC signaling and NBAP signaling, based on transmitting continuous time transmission of this overload bit and reception overload bit, and effective duration of change overload bit.
Referring to Figure 11, in step 1104, UE 1101 reports its TTI information by RRC message to RNC 1103.In step 1105, RNC 1103 determines the general transmitting continuous time of overload bit of a plurality of UE that are arranged in soft handover area based on the TTI information that receives from the UE that comprises UE 1101.
In step 1106, RNC 1103 notifies the transmitting continuous times of overload bit by the NBAP signaling to Node B 1102.In step 1108, the Node B 1102 storage transmitting continuous times of overload bit, and effective duration that overload bit is set be the integral multiple of transmitting continuous time of overload bit.Node B 1102 belongs to the active set of UE 1101.
In step 1107, RNC 1103 also notifies the transmitting continuous times of overload bit by the RRC signaling to UE 1101.In step 1109, UE stores the transmitting continuous time of overload bit, and in step 1110 integral multiple that effective duration is the transmitting continuous time of overload bit is set.
According to aforesaid one exemplary embodiment of the present invention, receive from non-serving node B under the situation of the general scheduling grant of indicating overload at the UE that is positioned at soft handover area, they do not allow to increase uplink data rate at predetermined effective duration.Therefore, the overall efficiency of mobile communication system is improved.
Though the present invention is illustrated and describes in conjunction with particular specific embodiment, but it will be evident to one skilled in the art that, can make various modifications and variations in detail thus, and not break away from the spirit and scope of the present invention that limit by appended claims.

Claims (17)

1. the method for scheduling uplink transfer of data in the subscriber equipment in the mobile communication system of support uplink Packet data service (UE), the method comprising the steps of:
In soft handover,, receive the specific schedule permission from serving node B, and receive general scheduling grant from least one non-serving node B by specific schedule with serving node B and at least one non-serving node B communication period;
If general scheduling grant indicated speed descends, then be no more than last uplink data rate at predetermined effective duration control uplink data rate; And
Send uplink data with the uplink data rate of being controlled.
2. method as claimed in claim 1, the control information of wherein following uplink data to send comprises the rate request position, and controlled step comprises the step that this rate request position is the value that increases of non-speed is set.
3. method as claimed in claim 1 further comprises the step of determining effective duration according to the duration of the Transmission Time Interval (TTI) that sends uplink data.
4. method as claimed in claim 1, whether wherein general scheduling grant comprises overload bit, indicate the uplink resource of at least one non-serving node B to transship.
5. method as claimed in claim 1 further comprises step: if the not indicated speed decline of general scheduling grant is then determined uplink data rate according to specific schedule information, and send uplink data with this uplink data rate of determining.
6. method as claimed in claim 5, wherein control information comprises the rate request position, and controlled step may further comprise the steps: if the not indicated speed decline of general scheduling grant, then the state according to UE is provided with the rate request position.
7. method as claimed in claim 1 further comprises by Radio Resource control (RRC) signaling, receives the information of effective duration of indication from the radio network controller (RNC) of the Radio Resource of control UE.
8. one kind is the method for subscriber equipment (UE) the scheduling uplink transfer of data of Node B in the mobile communication system of support uplink Packet data service, and the method comprising the steps of:
Send specific schedule by specific schedule and permit the UE that is arranged in soft handover area;
After sending the specific schedule permission, from UE receiving uplink data;
If the speed of the uplink data that receives is lower than the uplink data rate of indication in the specific schedule permission, then be no more than last uplink data rate at predetermined effective duration control uplink data rate; And
The specific schedule that sends indication control uplink data rate is permitted to UE.
9. method as claimed in claim 8 further comprises the step of determining effective duration according to the duration of the Transmission Time Interval (TTI) that sends uplink data.
10. method as claimed in claim 8 further comprises step: the information that receives effective duration of indication by Node B application protocol (NBAP) signaling from the radio network controller (RNC) of the Radio Resource of control UE.
11. a mobile communication system that is used in the support uplink Packet data service is the device of subscriber equipment (UE) scheduling uplink transfer of data, this device comprises:
The serving node B relevant and at least one non-serving node B with soft handover area; And
Be positioned at the UE of soft handover area, be used for receiving the specific schedule permission from serving node B by specific schedule, and receive general scheduling grant from least one non-serving node B, if general scheduling grant indicated speed descends, then be no more than last uplink data rate, and send uplink data with the uplink data rate of this control at predetermined effective duration control uplink data rate.
12. as the device of claim 11, the control information of wherein following uplink data to send comprises the rate request position, and UE is provided with the value that this rate request position is non-speed increase.
13. as the device of claim 11, wherein this effective duration was determined according to the duration of the Transmission Time Interval (TTI) that sends uplink data.
14. whether as the device of claim 11, wherein general scheduling grant comprises overload bit, indicate the uplink resource of at least one non-serving node B to transship.
15. as the device of claim 11, if the not indicated speed decline of wherein general scheduling grant, then this UE determines uplink data rate according to specific schedule information, and sends uplink data with determined uplink data rate.
16. as the device of claim 15, wherein control information comprises the rate request position, if the not indicated speed decline of general scheduling grant, then this UE is provided with the rate request position according to the state of UE.
17. as the device of claim 11, wherein UE is by Radio Resource control (RRC) signaling, receives information about effective duration from the radio network controller (RNC) of the Radio Resource of control UE.
CNA2005101315851A 2004-11-04 2005-11-04 Method and apparatus for scheduling uplink data transmission for mobile station in soft handover region Pending CN1777332A (en)

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