CN1694571A - Method and apparatus for selecting serving scheduling cell for soft handover user equipment - Google Patents

Method and apparatus for selecting serving scheduling cell for soft handover user equipment Download PDF

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Publication number
CN1694571A
CN1694571A CNA2005100788148A CN200510078814A CN1694571A CN 1694571 A CN1694571 A CN 1694571A CN A2005100788148 A CNA2005100788148 A CN A2005100788148A CN 200510078814 A CN200510078814 A CN 200510078814A CN 1694571 A CN1694571 A CN 1694571A
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sub
district
service dispatch
information
service
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郭龙准
崔成豪
李周镐
严桂霞
赵俊暎
许允亨
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
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

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

Abstract

A method and apparatus selects serving scheduling Node B for efficiently controlling and scheduling uplink traffic transmission from user equipments (UEs) located in a soft handover region. The UE selects a serving scheduling cell among cells included in its active set and transmits information on the selected serving scheduling cell to a Node B through uplink signaling. A service scheduling cell and non-serving scheduling cells efficiently control uplink traffic from the UE through independent scheduling. The efficient use of uplink resources contributes to an increase in the entire system performance and system stability.

Description

Select the apparatus and method of service dispatch sub-district for soft handover user equipment
Technical field
The present invention relates generally to Wideband Code Division Multiple Access (WCDMA) (WCDMA) communication.More specifically, the present invention relates to a kind of apparatus and method of when the subscriber equipment that is positioned at soft handover area is served the up-link (enhanced uplink dedicated channel) of the enhancing that is used for the uplink packet transmission, dispatching the up-link of this enhancing effectively.
Background technology
Based on the global system that is used for mobile communication system (GlobalSystem for Mobile Communications system as European mobile communication system, GSM) and use the 3-G (Generation Three mobile communication system) of Wideband Code Division Multiple Access (WCDMA) (WCDMA), the i.e. mobile energising in whole world telecommunications services (Universal MobileTelecommunications, UMTS) system provides a kind of and can send packet-based text with 2Mbps or higher two-forty, digitized voice or video and multi-medium data and no matter mobile phone user or computer user are positioned at the stable service where in the whole world.UMTS uses the virtual access notion be called " packet-switched access ", and it uses the packet oriented protocol of similar Internet Protocol (IP), and any terminal in can accesses network.
Fig. 1 is the schematic diagram that illustrates the configuration of traditional UTMS terrestrial radio access network (UTRAN).With reference to figure 1, UTRAN12 comprises radio network controller (RNC) 16a and 16b and Node B 18a, 18b, 18c and 18d, and terminal or subscriber equipment (UE) 20 are connected to core network 10.Among Node B 18a, 18b, 18c and the 18d each can have a plurality of sub-districts in its lower level.Among RNC16a and the 16b each is controlled a plurality of Node B that are associated with them in their lower level.For example in Fig. 1, RNC16a Control Node B18a and 18b, RNC16b Control Node B18c and 18d.A plurality of sub-districts that among Node B 18a, 18b, 18c and the 18d each is all controlled and they are associated.A RNC and a plurality of Node B that are associated with it and a plurality of sub-districts of being controlled by this RNC have constituted radio network sub-system (RNS) 14a and 14b.
RNC distributes or manages the radio resource of its a plurality of Node B, and in fact Node B provides this radio resource.The radio resource that is provided by Node B is meant the radio resource by these self-administered a plurality of sub-districts of Node B.The radio resource that UE can use a certain specific cell by a certain specific Node B to provide is created radio channel, and uses the channel of this establishment to communicate.Because distinguishing UE between Node B and sub-district is nonsensical and this UE only discerns the physical layer of being made up of the sub-district, uses so term " Node B " and " sub-district " will be used as the same meaning here.
Interface between UE and Node B is called the Uu interface, and its detailed hierarchy as shown in Figure 2.This Uu interface is divided into control interface (plane) that is used for exchange control signal between this UE and this Node B and the user interface that is used to send real data.
According to Fig. 2, control interface (C-plane) signaling 30 is handled through radio resource control (RRC) layer 34, radio link control (RLC) layer 40, media interviews controls (MAC) layer 42 and physics (PHY) layer 44, and user interface (U-plane) information 32 is handled through packet data control agreement (PDCP) layer 36, broadcast/group broadcast control (BMC) layer 38, rlc layer 40, MAC layer 42 and PHY layer 44.Among shown here each layer, PHY layer 44 is arranged in each sub-district and MAC layer 42 is arranged in RNC to rrc layer 34.
PHY layer 44 provides the information translation service by using radio conversion (transfer) technology, and corresponding to the ground floor of OSI(Open Systems Interconnection) model.Connection between PHY layer 44 and the MAC layer 42 realizes by transmission channel, and is that coming of how handling defines these transmission channels in PHY layer 44 according to particular data.
MAC layer 42 is connected to rlc layer 40 by logic channel.MAC layer 42 will be sent to PHY layer 44 from the data that rlc layer 40 receives by suitable transmission channel by logic channel, and will be sent to rlc layer 40 from the data that PHY layer 44 receives by suitable logic channel by transmission channel.In addition, MAC layer 42 is inserted into additional information by in the received data of logic channel or transmission channel, or analyzes the additional information that is inserted in the data and carry out suitable operation according to the additional information of having analyzed.In addition, MAC layer 42 control random access operation.In this MAC layer 42, the part that relates to user interface 32 is called as MAC-d, is called as MAC-c and relate to the part of controlling interface 30.
The foundation and the release of rlc layer 40 management logic channels.Rlc layer 40 can be that one of affirmation mode (AM), Unacknowledged Mode (UM) and transparent mode (TM) are operated with three kinds of operator schemes, and each operator scheme all provides different functions.Substantially, rlc layer 40 is provided by the function that the service data unit (SDU) that will provide from the upper strata split or be assembled into suitable size, and carries out error correction.
PDCP layer 36 is arranged in the upper strata of the rlc layer 40 of user interface 32, and the head with data that the form with the IP bag is sent carries out the function of compression and decompression, and has the function of lossless transmission data under the situation that the RNC that the service of moving is provided to particular UE changes.
The characteristic of transmission channel on upper strata that PHY layer 44 is connected to it is definite by transformat (TF), and this transformat has defined and carried out convolution chnnel coding for example, interweaved and the physical layer process of the processing of special services rate-matched.
Especially, the up-link (EUDCH or E-DCH) of UTMS system use enhancing strengthens the grouping transmission performance in the uplink communication from UE to the Node B.In order to support stable high-speed data to send, this E-DCH supports adaptive modulation and coding (AMC) for example, mix the technology such as scheduling that automatic repeat requests (HARQ) and Node B are controlled.The processing of E-DCH is to realize by the MAC-e layer of the lower level that is positioned at the MAC-d layer, and is called as the Medium Access Control (MAC) Protocol Data Unit (MAC-e PDU) of enhancing in the E-DCH data of MAC-e layer output.
Fig. 3 shows the concept map that sends the conventional method of system for uplink packet data on the E-DCH of radio link.With reference to figure 3, the Node B of this E-DCH is supported in reference number 100 representatives, and reference number 101,102,103 and 104 representatives send the UE of this E-DCH.Node B 100 analysis is used the state of the UE101 to 104 of these E-DCH, and is each UE data dispatching speed according to analysis result.In order to improve the performance of whole system, the mode of operation dispatching is that to specify lower data rate apart from Node B local UE far away be that the UE that is positioned at the place nearer apart from Node B specifies higher data speed in order to be positioned at, (Rise-over-Thermal, RoT) value does not exceed target heat increasing value as long as the heat of the Node B that records increases.
Fig. 4 shows the signaling diagram that sends and receive the conventional procedure of message on E-DCH.With reference to figure 4, in step 202, Node B and UE set up E-DCH between them.The foundation of this E-DCH is handled 202 and is comprised the processing that sends message by dedicated transmission channel.After this E-DCH set up, this UE offered Node B with schedule information in step 204.The total amount of the information of the excess power that this schedule information can comprise the power information of the UE that represents uplink traffic channel information, can use about this UE and the transmission data of in the buffer memory of UE, piling up.
In step 206, the schedule information that receives from this a plurality of UE place from the Node B supervision of a plurality of UE receiving scheduling information of communication with it is so that dispatch the data rate of each UE.Especially, in step 208, this UE of Node B decision permission sends uplink packet, and sends the scheduling appointed information to this UE.This scheduling appointed information comprises licensed data rate and licensed transmission timing.
In step 210, this UE uses this scheduling appointed information to determine the transformat (TF) of the E-DCH that will be sent out on opposite direction.In step 212, this UE sends up link (UL) grouped data by this E-DCH, and meanwhile in step 214, sends TF information to Node B.In step 216, Node B determines whether there is mistake in this TF information and this grouped data.In step 218, if there is mistake in any one among them, Node B just sends by the ACK/NACK channel does not confirm that (NACK) is to this UE.Yet if all there is not mistake among them, Node B just sends an acknowledgement (ACK) to this UE by this ACK/NACK channel.
If sent ACK, the transmission of so corresponding grouped data has just been finished, and therefore, this UE sends new data by this E-DCH.Yet if sent NACK, this UE retransmits same grouped data by this E-DCH so.
The aforesaid dispatching method that is used for the uplink packet transmission can be divided into SOME METHODS.Typical dispatching method comprises rate scheduling method and time and rate scheduling method.In the rate scheduling method, Node B progressively rank is controlled the data rate of each UE (step).In time and rate scheduling method, Node B is controlled time and the speed that uplink packet sends that is used for of UE simultaneously.
Fig. 5 is the schematic diagram that illustrates traditional rate scheduling method of carrying out between UE and Node B.UE502 is just in rate request information 505 and E-DCH data 506, and Node B 501 is sending the speed License Info 503 of representative about the information of the speed that is assigned to UE502 by scheduling.
That is to say that UE502 determines that the up link in its buffer memory sends data volume and its available excess power, and comes through-rate solicited message 505 transmission rate raising/reductions request according to definite result, thereby specifies the speed of next expectation.It is synthetic from UE502 with by the rate request information of other UE transmission of Node B 501 controls to receive the node 501 of rate request information 505, and determine whether to improve, reduces or keep the speed of UE502, and will determine that by use speed License Info 503 result notification gives UE502 according to synthetic result.
With reference to the special case of figure 5, at step S508, UE502 increases its speed by using rate request information 507 to send the raising rate request.The Node B 501 that receives this rate request information 507 uses speed License Info 509 to send the raising rate information to this UE502 by scheduling in step S510.Through-rate License Info 509 receives the UE502 that improves the speed permission can send uplink packet with speed 11 (512), and this speed is compared with speed 10 (511) before and improved a step.
In aforesaid rate scheduling, rate information can be represented with multistage speed in the identical form in being stored in Node B and UE before.In another case, rate information can be represented by the transmission block combination (TBC) of representing transmission block size (TBS).
Fig. 6 illustrates a kind ofly to send up link and down link control information and send the traditional time of uplink packet and the schematic diagram of rate scheduling method by UE according to this control information.
With reference to figure 6, UE603 is periodically sending to Node B 601 with UE state information 604 on the basis of Event triggered or on the basis based on the Event triggered that periodically sends.The Node B 601 that receives UE state information 604 selects UE603 as will permit the UE that sends in the duration of next frame, and be the speed that selected UE603 determines permission, and by using scheduling appointed information 602 that the admission rate of determining is sent to UE603.UE603 sends the E-DCH data in the other direction in the given time by using these scheduling appointed information 602 indicated speed then.
For example, UE603 at first uses speed 1 (610) to send E-DCH data 605.At step S621, if UE603 sends to Node B 601 with UE state information 611, Node B 601 operation dispatchings are to determine whether to permit that UE603 carries out the E-DCH transmission in the duration of next frame so.If Node B 601 is determined permission E-DCH and send that it just determines the speed of permission for UE603, also determine the information of the time that permission sends simultaneously.At step S641, Node B 601 sends to UE603 by using scheduling appointed information 631 with (permission) temporal information of appointment and (permission) rate information of appointment.UE603 speed 10 (651) according to appointment in based on the time of this scheduling appointed information 631 sends the E-DCH data.Owing to comprise the information that permission sends with speed 10 in the schedule information 631, so UE603 sends E-DCH data 605 with speed 10 (651).Yet if like that the be UE603 of Node B 601 shown in reference number 630 specifies the scheduling appointed information, UE603 uses speed 1 (650) so, and just minimum speed limit sends E-DCH data 605.Then, in step 642, if Node B 601 has sent the scheduling appointed information 632 of representing speed 15, UE603 can dispatch appointed information 632 according to this and send E-DCH data 605 with speed 15 (652) so.
So far, traditional dispatching method has been described.Owing to E-DCH is the channel that strengthens for dividing into groups in the uplink transmission channels to send, so it follows the fundamental characteristics of dedicated channel.One of them supports soft handover exactly, and in this case, the UE that is arranged in soft handover area can be subordinated to all Node B place receiving downlink information of its active set (active set).Therefore, this UE that is arranged in this soft handover area is subordinated to all Node B place receiving scheduling appointed information of its active set, so that send this E-DCH.
In this case, when scheduling is arranged in the UE of this soft handover area, all Node B that belong to the active set of this UE all send their scheduling appointed information separately to this UE, produced signaling consumption, and also may when being identified for the TF of E-DCH transmission, have difficulties from the UE of all Node B reception signaling appointed information.
Summary of the invention
Therefore, in order to solve foregoing problems, the invention provides a kind of method and apparatus that is used for dispatching for the subscriber equipment (UE) that is arranged in soft handover area the up-link (E-DCH) that strengthens in Wideband Code Division Multiple Access (WCDMA) (WCDMA) communication system.
In addition, the present invention also provides a kind of method and apparatus that is used to the UE that is arranged in soft handover area to select service (or optimum) scheduling node B.
At last, the present invention also provides a kind of Signalling method and device, and the UE that wherein is arranged in soft handover area can carry out signaling, makes the information of service dispatch Node B of relevant selection to share between Node B and this UE like this.
According to an aspect of the present invention, provide a kind of by in the mobile communication system of the system for uplink packet data service that support to strengthen because soft handover and send the method for system for uplink packet data with the subscriber equipment (UE) that a plurality of sub-districts communicate, this method may further comprise the steps: the service dispatch sub-district that is used to this UE scheduling uplink packet data service according at least one selection in downlink path-loss information, uplink load state information and affirmation (ACK) the rate information; Indicate the information of selected service dispatch sub-district to a plurality of cell notification; Selected service dispatch sub-district and unselected non-service dispatch sub-district receive the speed License Info that is used to send system for uplink packet data from a plurality of sub-districts; And send this system for uplink packet data to a plurality of sub-districts according to this speed License Info.
According to a further aspect in the invention, a kind of subscriber equipment (UE) device that is used for sending system for uplink packet data when the mobile communication system of the system for uplink packet data service of supporting to strengthen communicates owing to soft handover and with a plurality of sub-districts is provided, this device comprises: service dispatch cell selecting device is used for being used to this UE to dispatch the service dispatch sub-district of this system for uplink packet data service according at least one selection of downlink path-loss information, uplink load state information and affirmation (ACK) rate information; The control information transmitter is used for sending the identifying information of representing selected service dispatch sub-district to a plurality of sub-districts; And data transmitter, be used for receiving the speed License Info that is used for the system for uplink packet data transmission, and send system for uplink packet data to these a plurality of sub-districts according to this speed License Info from the selected service dispatch sub-district and the unselected non-service dispatch sub-district of a plurality of sub-districts.
According to a further aspect in the invention, provide a kind of in the mobile communication system of the system for uplink packet data service of supporting to strengthen, receive method by the Node B that communicates with the subscriber equipment of carrying out soft handover (UE) from the system for uplink packet data of UE, this method may further comprise the steps: from this UE receive representative from a plurality of sub-districts that this UE communicates by letter the information of selected service dispatch sub-district, wherein the service dispatch sub-district is that this UE is according to downlink path-loss information, in uplink load state information and affirmation (ACK) the rate information at least one is selected; According to this service dispatch cell information, the speed License Info that will be represented as the specified speed of system for uplink packet data transmission by selected service dispatch sub-district or unselected non-service dispatch sub-district sends to this UE; And according to this speed License Info from this UE receiving uplink grouped data.
Description of drawings
Above and other purpose, characteristics and advantage of the present invention are incited somebody to action following detailed in conjunction with the drawings and are become clear:
Fig. 1 is the schematic diagram that illustrates the conventional arrangement of UTMS terrestrial radio access network (UTRAN);
Fig. 2 is traditional hierarchy of the interface of representative between UE and Node B;
Fig. 3 shows the concept map that sends a kind of conventional method of system for uplink packet data in conventional wireless current source road by E-DCH;
Fig. 4 shows the signaling diagram that sends and receive the conventional procedure of message by E-DCH;
Fig. 5 is the schematic diagram that illustrates traditional rate scheduling method of carrying out between UE and Node B;
Fig. 6 illustrates the traditional time of carrying out and the schematic diagram of rate scheduling method between UE and Node B;
Fig. 7 is the schematic diagram that illustrates traditional E-DCH operation of the UE that is arranged in soft handover area;
Fig. 8 shows and is sending UE, the E-DCH of sub-district and the concept map of the traditional communication between the Node B;
Fig. 9 shows the signaling diagram that sends the process of UL load condition information according to embodiments of the invention by BCH;
Figure 10 shows the signaling diagram that sends the process of UL load condition information according to embodiments of the invention by dedicated channel;
Figure 11 illustrates the flow chart of selecting the operation of service dispatch sub-district according to embodiments of the invention;
Figure 12 illustrates the device schematic diagram that is used for determining the service dispatch sub-district according to embodiments of the invention;
Figure 13 shows the signaling diagram that the process of sub-district ID is set according to embodiments of the invention;
Figure 14 illustrates according to embodiments of the invention to send the UE schematic representation of apparatus of service dispatch cell information by using DPCCH;
Figure 15 illustrates according to embodiments of the invention to send the UE schematic representation of apparatus of service dispatch cell information by using E-DPCCH; With
Figure 16 illustrates the schematic diagram of structure that is used to send the MAC-e PDU of service dispatch cell information according to embodiments of the invention.
Embodiment
Several exemplary embodiment of the present invention is described in detail with reference to the accompanying drawings.In the following description, for simplicity, be combined in this known function and the detailed description of structure and be omitted.
The present invention has remedied following shortcoming (for example low quality and signal attenuation), promptly when subscriber equipment (UE) is arranged in the soft handover area of system of the up-link (E-DCH) that support to strengthen, downlink signaling information increases on total amount and the UE of receiving scheduling appointed information can not determine the transformat (TF) of this E-DCH clearly.In addition, the present invention to select service (or optimum) dispatching cell/Node B and signals the information that (signal) accompanies with it in order effectively to dispatch.
Embodiments of the invention are intended to improve the E-DCH scheduling of the UE that is arranged in soft handover area.
Now with reference to accompanying drawing 7 traditional operating in soft handover is described.In Fig. 7, Node B 1 701 and Node B 2 702 can receive the E-DCH data, and UE1 to UE3, just 703,706 and 710 can send the E-DCH data.UE1 703 and UE2 706 do not belong to soft handover area, and respectively only by Node B 1 701 with only carry out E-DCH scheduling by Node B 2 702.Therefore, UE1703 can receive the scheduling appointed information 704 from Node B 1 701, and uses this scheduling appointed information 704 to send E-DCH data 705.On the other hand, UE2 706 can receive the scheduling appointed information 707 from Node B 2 702, and uses this scheduling appointed information 707 to send E-DCH data 708.
Yet the UE3 710 that belongs to soft handover area has Node B 1 701 and Node B 2 702 unit as its active set simultaneously.Therefore, this UE3 710 can receive the signal that sends from Node B 1 701 and Node B 2 702, and Node B 1 701 and Node B 2 702 both also can receive the signal that sends from UE3 710.Like this, send for the E-DCH data of UE3 710, Node B 1 701 and Node B 2 702 are carried out the E-DCH scheduling to UE3 710 independently of one another, and will dispatch appointed information 711 and 713 respectively and send to UE3 710.Because the independent scheduling appointed information that UE3 710 receives from Node B 1 701 and Node B 2 702, so it has difficulties in the transformat of determining E-DCH data 712 and 714.Therefore, the UE3 710 that is arranged in soft handover area carries out the E-DCH transmission with different methods with UE1 703 that is arranged in non-soft handover area and UE2 706.
In one embodiment of the invention, the UE that is arranged in soft handover area selects and can improve the optimal node B of systematic function and stability as " service dispatch Node B " in scheduling process in a plurality of Node B that belong to the active set that they control oneself, and provide relevant information to selected service dispatch Node B, and this service dispatch Node B is used different E-DCH dispatching methods with non-service dispatch Node B.The Node B that the E-DCH that selects the simplest approach of service dispatch Node B to be selected to receive the noise aspect sent by UE has the greatest impact is as the service dispatch Node B.
Service dispatch Node B and the employed different dispatching method of non-service dispatch Node B are described now.
(a) In the system that only uses rate scheduling
The UE that is arranged in soft handover area selects the service dispatch Node B, and only selected Node B is carried out the E-DCH scheduling to this UE.That is to say to have only selected Node B transmission rate License Info to give this UE.Be included in the active set of this UE but a plurality of Node B of non-service dispatch Node B are not carried out the E-DCH scheduling to this UE.In other words, these non-service dispatch Node B not the transmission rate License Info give this UE.This UE is also only from service dispatch Node B receiving velocity License Info, and uses the speed License Info that is received when determining the transformat of E-DCH.
(b) In the system of only service time and rate scheduling
The UE that is arranged in soft handover area selects the service dispatch Node B, and only selected Node B sends the scheduling appointed information to this UE, and those are included in the active set of this UE but the Node B of non-service dispatch Node B is not then carried out the scheduling to this UE.That is to say that non-service dispatch Node B does not send the scheduling appointed information to this UE.The scheduling appointed information comprises the speed of appointment and sends the permission timing information.This UE also only uses the scheduling appointed information that is received from service dispatch Node B receiving scheduling appointed information and when determining the transformat of E-DCH.
(c) In use in the system of scheduling and time and rate scheduling
The UE that is arranged in soft handover area selects the service dispatch Node B, and only selected service dispatch Node B is carried out rate scheduling and time and rate scheduling and transmission rate License Info or dispatched appointed information to this UE.The Node B of non-service dispatch Node B is only carried out the rate scheduling to this UE and those are included in the active set of this UE.That is to say that those non-service dispatch Node B are given this UE with the transmission rate License Info only.This UE is from service dispatch Node B receiving velocity License Info and scheduling appointed information, and from those non-service dispatch Node B receiving velocity License Info only.This UE uses from the scheduling appointed information of service dispatch Node B and determines the transformat of this E-DCH from the speed License Info of those non-service dispatch Node B.
1. service dispatch sub-district/Node B determines
To the UE that is arranged in soft handover area implement this dispatching method the technology of eager needs be to determine the method for service dispatch Node B.UE uses from the various information of Node B reception and state information thereof and determines this UE is carried out the service dispatch Node B that E-DCH dispatches.
The UE that now description is arranged in soft handover area determines the method for service dispatch Node B.In the following description, will suppose that each Node B all comprises a plurality of sub-districts, and these sub-districts are distinguished mutually according to their unique frequency configuration (FA) and scrambler.In this case, this UE can select specific sub-district as the service dispatch sub-district, or selects the affiliated Node B in this specific sub-district as the service dispatch Node B.
According to one embodiment of present invention, the UE that is arranged in soft handover area selects to have the sub-district of minimal path loss in the sub-district that belongs to its active set, and selects the affiliated Node B in this selecteed sub-district as the service dispatch Node B.Below detailed system of selection will be described according to one embodiment of present invention.
(a) Consider the system of selection of the downlink path-loss of each sub-district/Node B
Each sub-district that UE communicates by letter with it all have public control pilot channel (common controlpilot channel, CPICH).Because this UE will measure signal code power (the received signal code power of the CPICH that is received, RSCP) and by the top signaling path receive the transmitted power of CPICH from system, so the equation (1) of this UE below using calculates the downlink path-loss (Downlink_Path_Loss) of each sub-district.
Downlink_Path_Loss (dB)=original CPICH Tx power (dB)-CPICH_RSCP (dB) ... equation (1)
The transmitted power of the CPICH that receives by the top signaling path of " original CPICH Tx power " expression wherein, and CPICH_RSCP represents the RSCP of CPICH.
After using equation (1) to calculate the downlink path-loss value of the sub-district that belongs to its active set, this UE relatively selects the service dispatch Node B mutually by the downlink path-loss value that will calculate.This downlink path-loss value becomes the parameter of the preferred channels state of representative between Node B and UE, and has having the greatest impact that the Node B of minimal path loss value is subjected in the up link process of transmitting of this UE.Although between uplink pathloss value and downlink path-loss value, may have some differences, can think that the downlink path-loss value equals the uplink pathloss value in the long time interval.
Fig. 8 is a concept map, and it illustrates the traditional communication between the UE in soft handover area and a plurality of Node B.With reference to Fig. 8, Node B 1801 is being managed sub-district A803, and Node B 2802 is being managed sub-district B804 and sub-district C805.The UE810 in zone 806 that is arranged in the lap of sub-district A803, sub-district B804 and sub-district C805 has sub-district 803,804 and 805 unit as its active set, and Node B 801 and 802 is included in this active set.Sub-district 803,804 and 805 sends CPICH811,812 and 813 respectively, and UE810 803,804 and 805 receives CPICH811,812 and 813 from the sub-district respectively, and by the top signaling road through receiving information about the transmitted power of CPICH.Therefore, UE810 is based on the various computing downlink path-loss value between CPICH RSCP and CPICH transmitted power of sub-district 803,804 and 805, and selects to have the sub-district of minimal path loss value by the path loss values that relatively calculates.UE810 is defined as the service dispatch sub-district with selected sub-district then, will comprise that maybe the Node B of selected sub-district is defined as the service dispatch Node B.
In the description in front, a kind of method of selecting to have the sub-district of minimal path loss value by path loss values has relatively been proposed.In another embodiment, UE can select the service dispatch Node B by the Node B of selecting to have the minimal path loss value.That is to say, because the uplink signal that receives from the several sub-districts by a Node B management carries out soft combination in Node B, so UE can calculate the path loss values of each Node B.The process of path loss values of calculating each Node B is identical with the process of the path loss values of each sub-district of previous calculations.That is to say that UE obtains the path loss values of Node B by the path loss values of all sub-districts of belonging to Node B is sued for peace.Then, the Node B with minimal path loss value is selected as the service dispatch Node B.
(b) Use the system of selection of RoT
In the process of selecting the service dispatch Node B, UE also considers up link (UL) load condition except the path loss values of considering above-mentioned CPICH as additional parameter.This UL load condition information comprises Node B the exceeding the quata of employed uplink resource in the process that UE is dispatched, for example RoT.That is to say to have the influence that up link that Node B that less uplink resource exceeds the quata is subjected to UE biglyyer sends.Therefore, UE selects to have the Node B of maximum RoT as the service dispatch Node B.
In order to allow UE to use the UL load condition in the process of determining the service dispatch Node B, Node B offers this UE with UL load condition information.When being arranged in soft handover area, UE all sub-districts from the active set that is included in it receive UL load condition information.Therefore, should add a kind of new process that is used to send UL load condition information, and following method is available.
UL load condition information can be based on each little area definition, and the Node B of management sub-district has the UL load condition information of this sub-district.Here, RoT may be calculated the ratio of thermal noise power spectrum density (No) with the full frequency acceptance band power spectral density (Io) of Node B of Node B.Therefore, RoT just becomes Node B can serve specified radio resource for system for uplink packet data in up link.Because UL load condition information is common to all UE that belong to this sub-district, so angle from resource utilization, preferably UL load condition information is sent to all UE at one time, rather than UL load condition information is sent to each UE separately.
The method that UL load condition information is sent to all UE that belong to a sub-district is used broadcast channel (BCH).All UE that are included in each sub-district should use predefined coding and predefined transformat for the channel BCH of each little area definition, so that can both use the information that is defined in this sub-district.Therefore, not only do not have the UE of dedicated channel, have UE dedicated channel, that be in cell private channel (CELL-DCH) state simultaneously, can obtain UL load condition information, to be used for the E-DCH service by receiving the decode this BCH.
Fig. 9 is that diagram sends the signaling diagram of UL load condition information to the process of UE according to embodiments of the invention by BCH.With reference to Fig. 9, UE901 belongs to the sub-district by Node B 902 management.At step S904, (Node B Application Part protocol, NBAP) signaling sends to the UL load condition information of this sub-district the service radio network controller (SRNC) 903 of this UE901 of control to Node B 902 by the node B application part agreement.At step S905, SRNC903 sends to UE901 by the RRC signaling of using BCH with UL load condition information.
In another embodiment, just need UL load condition information owing to only be arranged in the UE of soft handover area, so UL load condition information can only send to UE rather than all UE in sub-district that is arranged in soft handover area.For example, SRNC can send to UL load condition information each UE that is arranged in soft handover area by using dedicated channel (DCH).
Figure 10 illustrates the signaling diagram that sends the process of UL load condition information according to embodiments of the invention by the RRC signaling.With reference to Figure 10, UE1001 belongs to by the sub-district of Node B 1002 management and is arranged in soft handover area.At step S1004, Node B 1002 sends to the UL load condition information of this sub-district by the NBAP signaling SRNC1003 of control UE1001.At step S1005, SNRC1003 sends to UE1001 by the RRC signaling of using DCH with UL load condition information.
In the description in front, the method that a kind of BCH of use or DCH send UL load condition information has been proposed.Yet, it is apparent that, UL load condition information can be sent in the sub-district embodiment that the another one channel of UE of the UE that carries out the system for uplink packet data service, the UE that is arranged in soft handover area or request UL load condition information or method can the application of the invention and be achieved.
(c) Use and mix the system of selection that sends request (HARQ) automatically
Because E-DCH supports HARQ, so UE after sending the E-DCH data, receives as the affirmation (ACK) of the feedback information of E-DCH data or do not confirm (NACK) information from Node B.In this case, the UE that is arranged in soft handover area receives this ACK/NACK information from a plurality of Node B.Therefore, this UE that is arranged in soft handover area can determine that it is the Node B with better uplink channel state that a plurality of Node B at the active set that belongs to this UE have the Node B that higher ACK leads, and for example is subjected to the Node B of maximum effect in the up link process of transmitting of this UE.As a result, this UE selects to have the Node B of the highest ACK transmission rate as the service dispatch Node B.
(d) Use downlink path-loss information, UL load condition information and ACK to lead the selection of information
Method
This system of selection 11 is described in detail with reference to the accompanying drawings.Figure 11 is a flow chart, and it shows the UE that is arranged in soft handover area according to embodiments of the invention and finally selects the method for service dispatch sub-district or service dispatch Node B by using above-mentioned information.
With reference to Figure 11, in step 1101, UE relatively is included in the downlink path-loss value Path_loss of all sub-districts in its active set, and selects at least one to have the sub-district of minimal path loss value Min_Path_loss in a plurality of sub-districts.In the process of execution in step 1101,, may there be sub-district with same paths loss value according to the quantization method of path loss values.Therefore, in step 1102, whether the number that this UE determines to have the sub-district of minimal path loss value is 1.If having the number of the sub-district of minimal path loss value is 1, so in step 1103, this UE selects to manage the Node B of the sub-district with minimal path loss value as the service dispatch Node B.
Yet, if the number of sub-district of determining to have the minimal path loss value in step 1102 is greater than 1, so in step 1104, this UE selects at least one to have the highest UL load condition in these have a plurality of sub-districts of minimal path loss value, for example has the sub-district of maximum RoT value Max_RoT.Similarly, owing to may there be several sub-districts, so in step 1105, whether the number that this UE determines to have the sub-district of maximum RoT value is 1 with maximum RoT value.If having the number of the sub-district of maximum RoT value is 1, so in step 1106, this UE selects to manage the Node B of the sub-district with maximum RoT value as the service dispatch Node B.On the contrary, if the number of sub-district with maximum RoT value is greater than 1, so in step 1107, this UE relatively these ACK with sub-district of maximum RoT value leads, and has Node B that selection in the sub-district of maximum RoT value has the sub-district that the highest ACK leads as the service dispatch Node B at these.
Although the Node B of selecting the management specific cell here is as the service dispatch Node B, in the embodiment that replaces, this UE also can select this specific sub-district as the service dispatch sub-district.In addition, selecteed although the service dispatch sub-district is based on each sub-district here, in the replacement method, the service dispatch Node B also can be based on each Node B and is selected.11 do below with reference to the accompanying drawings to describe in detail.
Since from by the received uplink signal in several sub-districts of Node B management this Node B by soft combination, so UE calculates the path loss values of each Node B.That is to say that this UE can belong to the path loss values that the summation of path loss values of all sub-districts of Node B is come computing node B by use.Whether then in step 1101, this UE selects to have the Node B of minimal path loss value summation, and be 1 in the number that step 1102 determines to have the Node B of minimal path loss value summation.If having the number of the Node B of minimal path loss value summation is 1, so in step 1103, this UE selects to have the Node B of minimal path loss value summation as the service dispatch Node B.But, if the number of Node B of in step 1102, determining to have minimal path loss value summation greater than 1, this UE execution in step 1104 and subsequent process so, as previously described.
In the process of carrying out embodiments of the invention as shown in figure 11, UE need be included in the information of the Node B under the sub-district in its active set.That is to say that this UE needs the information of the affiliated Node B in its sub-district, so that calculate the summation of the path loss values of a plurality of sub-districts that belong to this same Node B.So far, the SRNC that controls this UE will send to this UE about the information that is included in the Node B under the sub-district in the active set by using RRC message.
Although embodiments of the invention use the schedule information that leads the information order according to downlink path-loss information, UL load condition information and ACK when selecting service dispatch sub-district/Node B, the application order of schedule information changes according to the judgement of system designer.In another alternative embodiment, can be only by using in the schedule information some to select service dispatch sub-district/Node B.For example, UE can use downlink path-loss information, UL load condition information and ACK to lead in the information at least one select service dispatch sub-district/Node B.
(e) use downlink path-loss information, UL load condition information and ACK to lead adding of information The system of selection of power combination
Should be according to the system of selection of embodiments of the invention with reference to the accompanying drawings 12 and be described in detail.In Figure 12, UE calculates the summation of downlink path-loss value 1201, UL load condition information (for example, RoT value) 1202, ACK value of rate 1203 and other reference value 1204 of each sub-district that is contained in its active set.As shown in figure 12, path loss values 1201 is multiplied by weighting W1 (1205) in multiplier 1206, UL load condition information (RoT value) 1202 is multiplied by weighting W2 (1207) in multiplier 1208, ACK value of rate 1203 is multiplied by weighting W3 (1209) in multiplier 1210, and other reference value 1204 is multiplied by weighting W4 (1211) in multiplier 1212.Because RoT value 1202 and ACK value of rate 1203 are directly proportional with dispatching priority, and downlink path-loss value 1201 is inversely proportional to dispatching priority, so weighting W1 (1205) is different with other weighting 1207 and 1209, it can have negative value.In another kind of situation, the inverse of downlink path-loss value 1201 can be imported in the multiplier 1206.
Priority calculator 1213 calculates the weighted sum (or weighted array) of those values that are multiplied by weighting, and will the priority 1 214 of respective cell be exported to service dispatch cell selecting device 1217 based on this weighted sum.This service dispatch cell selecting device 1217 receives the priority 1 214,1215 and 1216 that is included in all sub-districts in this UE active set, and relatively weighted sum 1214,1215 and 1216 is managed the Node B of the sub-district with limit priority as the service dispatch Node B with selection then.Perhaps, this service dispatch cell selecting device 1217 selects to have the sub-district of the highest weighted sum as the service dispatch sub-district.
In alternative embodiment, the weighted sum of the path loss values summation of each sub-district of UE computing node B, RoT value summation and the ACK value of rate summation, and the weighted sum that relatively calculates for a plurality of Node B selects to have the Node B of maximum weighted summation as the service dispatch sub-district.
Service dispatch cell selecting device 1217 will be represented by the selected service dispatch sub-district of coming out of one of system of selection shown in Figure 12 or other aforesaid system of selection and send E-DCH transmitter 1219 and control information transmitter 1221 to.This control information transmitter 1221 sends to the information about this service dispatch sub-district a plurality of sub-districts of communicating by letter with this UE, and E-DCH transmitter 1219 is discerned service dispatch sub-district and non-service dispatch sub-district according to this service dispatch cell information, and determine E-DCH speed, and send the E-DCH data with this E-DCH speed of determining according to the scheduling appointed information or the speed License Info that receive from service dispatch sub-district and non-service dispatch sub-district.
2. the notice of the ID of service dispatch sub-district/Node B
So far, described the present invention be used for selecting the service dispatch Node B method embodiment and in the process required unit of selecting the service dispatch Node B.Below, be used for notifying embodiment with introduction by the method for the present invention of the selected service dispatch Node B of the UE that is positioned at soft handover area.
In the process of selecting the service dispatch Node B, the service dispatch sub-district is at first selected.In this case, UE is notified to system by using sub-district ID with the sub-district ID of service dispatch sub-district, and system can be defined as the service dispatch Node B with the Node B that comprises the sub-district that its sub-district ID is identical with the sub-district ID of service dispatch sub-district.Arrive here, the signaling of sub-district ID need be set.That is to say that UE should have identical sub-district ID with Node B, ID is notified to system with service dispatch sub-district or service dispatch Node B so that this UE uses this sub-district.
The Signalling method that is used to be provided with sub-district ID according to embodiments of the invention is described referring now to accompanying drawing 13.With reference to Figure 13, UE1301 with the cell communication that belongs to Node B 1302, the Iur that Node B is connected to DRNC1303 via Iub and is established to SRNC1304 connects with control UE1301 and DRNC1303.In order to set up E-DCH, if sending, SRNC1304 is used for radio network subsystem application part agreement (Radio Network Subsystem Application Part protocol, RNSAP) radio link of signaling is set up request message 1310 to DRNC1303, and DRNC1303 sets up request message 1311 by the radio link that is used for the NBAP signaling and will preferably include the information of setting up request message 1310 at radio link and send Node B 1302 to so.This Radio Link is set up the information that request message 1310 and 1311 comprises the sub-district that can communicate by letter with it about this UE1301, and cell information preferably includes the sub-district ID of sub-district.
Receive Node B 1302 that this radio link sets up request message 1311 and set up request message 1311 in response to this radio link and send the radio link setup response message 1312 to DRNC1303 that is used for the NBAP signaling, and DRNC1303 sets up request message 1310 in response to radio link and sends radio link setup response message 1313 to SRNC1304.Carry out in an identical manner in aforementioned process all sub-districts in being included in the active set of UE1301.
Next, for the sub-district ID of each sub-district in the active set that will be included in UE1301 is notified to UE1301, the radio bearer circuit that SRNC1304 is used for the RRC signaling by use is set up the sub-district ID that message 1314 will be assigned to each sub-district and is notified to UE1301.UE1301 sends the radio bearer circuit foundation that is used for the RRC signaling and finishes message 1315 to SRNC1304, thereby finishes the foundation of sub-district ID.
Then, the SRNC1304 of control UE1301 sets up message 1314 such RRC message by radio bearer circuit in the use image pattern 13 and will send to UE1301 about the information of the Node B under each sub-district in the active set that is included in UE.
So far, the process of selecting service dispatch sub-district or service dispatch Node B has been described.After the process of having selected service dispatch sub-district or service dispatch Node B, if this UE is by several method is as service dispatch cell selecting sub-district ID or be service dispatch Node B selection Node B ID according to an embodiment of the invention below using, this UE provides information about selected ID to the Node B that communicates with so.
In first method, UE uses Dedicated Physical Control Channel (DPCCH) that the ID of service dispatch sub-district or the ID of service dispatch Node B are sent to a plurality of Node B.With reference to the accompanying drawings 14, below will describe according to embodiments of the invention and use the ID of the ID of the service dispatch sub-district that DPCCH will determine in UE or service dispatch Node B to send to the UE device of a plurality of Node B.
With reference to Figure 14, service dispatch sub-district ID or service dispatch Node B ID are selected in service dispatch sub-district/Node B ID selector 1401, then this sub-district ID/ Node B ID in channel encoder 1402 by chnnel coding to be provided at the noise robustness in the channel.This encoded signals is carried out multiplexedly with pilot signal 1403, power control signal 1404 and other signal 1405 in multiplexer 1406, produces DPCCH data 1407.These DPCCH data 1407 in multiplexer 1411 with Dedicated Physical Data Channel (DPDCH) 1408, DPCCH (E-DPCCH) data 1409 that strengthen and DPDCH (E-DPDCH) data 1410 that strengthen carry out multiplexed, then by modulator 1412 modulation.Signal after this modulation sends to Node B by transmitter 1413 up links.Here, E-DPDCH is the physical channel that E-DCH is mapped to, and is used to carry for example physical channel of the transmission parameter of E-DPDCH as the E-DPCCH of the control information of E-DCH.
In second embodiment, UE uses E-DPCCH to send service dispatch sub-district ID or service dispatch Node B ID.This E-DPCCH sends the control information of E-DCH and the uplink channel of the information that comprises HARQ information and transmission block size (TBS) that this E-DPCCH carried.
With reference to accompanying drawing 15, the ID that will describe ID by using the service dispatch sub-district that E-DPCCH will determine in UE or service dispatch Node B below sends to the UE device of a plurality of Node B.
With reference to accompanying drawing 15, service dispatch sub-district ID or service dispatch Node B ID are selected in service dispatch sub-district/Node B ID selector 1501, then this sub-district ID/ Node B ID in channel encoder 1502 by chnnel coding to be provided at the noise robustness in the channel.This encoded signals is carried out multiplexedly with HARQ relevant information 1503, TBS information 1504 and other control information 1505 in multiplexer 1506, and produces E-DPCCH data 1507.These E-DPCCH data 1507 in multiplexer 1511 with DPCCH data 1508, DPDCH data 1509 and E-DPDCH data 1510 carry out multiplexed, then by modulator 1512 modulation.Signal after this modulation is sent out device 1513 up links and sends to Node B.
In the 3rd embodiment, UE was included in service dispatch sub-district ID or service dispatch Node B ID in the MAC-e protocol Data Unit (PDU) of E-DCH before sending.The data format of E-DCH as shown in figure 16.
With reference to accompanying drawing 16, be added in the MAC-e head 1601 that comprises HARQ or scheduling relevant information as user data MAC-e service data unit (SDU) 1602 partly, therefore produce MAC-e PDU1604.That is to say that MAC-e head 1601 should be interpreted as comprising the part of all remaining informations except that user data here, rather than be positioned at the information of MAC-e PDU1604 head.This MAC-e PDU1604 is added in the Cyclic Redundancy Check 1603, is created in the code block 1605 that uses in the physical layer thus.UE was included in service dispatch sub-district ID or service dispatch Node B ID in the MAC-e head 1601 before sending, and Node B just can determine by reception and this MAC-e head 1601 of decoding whether it comprises that service dispatch sub-district or it become the service dispatch Node B then.When UE used MAC-e PDU in this way, the control information transmitter that is used to send service dispatch Node B ID was identical with the E-DCH transmitter.
3. scheduling operation
To be described in the UE that is arranged in soft handover area according to embodiments of the invention has below selected service dispatch sub-district or service dispatch Node B and has carried out after the signaling wherein detailed scheduling operation to service dispatch Node B and non-service dispatch Node B.As mentioned above, the service dispatch Node B has the center power that the UE that is arranged in soft handover area is dispatched.That is to say, the service dispatch Node B can use the scheduling appointed information to carry out time and rate scheduling, use the speed License Info to carry out rate scheduling, or use the scheduling appointed information to carry out time and rate scheduling and use speed License Info simultaneously and carry out rate scheduling.
Yet, be included in the active set of UE but be not that the non-service dispatch Node B of service dispatch Node B does not have the center power that UE is dispatched.That is to say that this non-service dispatch Node B is carried out passive scheduling so that the influence of UE is minimized, rather than on one's own initiative its uplink resource is assigned to this UE.The dispatching method of non-according to an embodiment of the invention service dispatch Node B to the UE of soft handover will be described below.For simplicity, suppose that here the service dispatch Node B sends the scheduling appointed information.
Although non-service dispatch Node B also receives uplink signal from the UE that is arranged in soft handover area, to compare with the service dispatch Node B, its influence that received by up link is smaller.Therefore, the scheduling of the resource situation of considering aforementioned non-service dispatch Node B effectively will be described below.
In first embodiment, non-service dispatch Node B is used and can be represented 1 bit signal of two types of information to come operation dispatching.More specifically, this non-service dispatch Node B can represent and be indifferent to 1 bit scheduling grant of (Don ' tcare) information and decline (Down) information to send to the UE that is arranged in soft handover area.
If be indifferent to information from the scheduling grant representative that non-service dispatch Node B receives, this UE only uses the data rate of determining E-DCH from the scheduling appointed information of service dispatch Node B so.Yet if represent decline information from the scheduling grant of non-service dispatch Node B reception, this UE reduces a step with the speed of E-DCH so, and does not consider the scheduling appointed information from the service dispatch Node B.
This scheduling grant uses 1 bit to send, and the information of high possibility occurrence can suffer discontinuous transmission (DTX) and have.That is to say, be higher than decline information if be indifferent to the possibility occurrence of information, then non-service dispatch Node B just is not indifferent to information with " 0 " value representation by do not send scheduling grant on physical channel, and uses "+1 " or " 1 " value to send decline information on physical channel.Be indifferent to information if the possibility occurrence of decline information is higher than, preceding method can be carried out by opposite mode so.
If there are two or more non-service dispatch Node B, UE just receives two or more scheduling grant so.In this case, this UE in following method by these two or more scheduling grant are made up to determine final scheduling grant.
In " OR-of-Down (descend-or) " embodiment, if any one of the scheduling grant that is received is decline information, this UE is defined as decline with final scheduling grant so.In weighted sum embodiment, this UE will be on duty being assigned to the weighting of the Node B relevant with them from the received scheduling grant of a plurality of non-service dispatch Node B, and multiplied result is made up, to produce the scheduling grant of weighted array.After this, whether this UE represents according to the scheduling grant of this weighted array and is indifferent to or descends to determine final scheduling grant.Here, the scheduling grant value that is used to multiply by to the specified weighting of each Node B is the hard decision value of representing the soft-decision-value of actual number or representing integer.
In a second embodiment, non-service dispatch Node B is used and can be represented 1 bit signal of three types of information to come operation dispatching.More specifically, on behalf of the 1 bit scheduling grant of being indifferent to information, decline information and critical (Marginal) information, this non-service dispatch Node B can send to the UE that is arranged in soft handover area.
If be indifferent to information from the scheduling grant representative that non-service dispatch Node B receives, this UE only uses the data rate of determining E-DCH from the scheduling appointed information of service dispatch Node B reception so.Yet if represent decline information from the scheduling grant of non-service dispatch Node B reception, this UE reduces a step with the speed of E-DCH so, and does not consider the scheduling appointed information from the service dispatch Node B.In addition, if represent critical message from the scheduling grant of non-service dispatch Node B reception, this UE uses the method based on possibility to determine whether the speed of E-DCH is reduced a step so.That is to say that this UE produces a random value, and if this random value greater than first reference value, then this UE just abides by the scheduling of service dispatch Node B.If this random value is less than second reference value, this UE just reduces a step with the speed of E-DCH so.Yet, if this random value between first reference value and second reference value, this UE keeps the speed of E-DCH.
Scheduling grant uses 1 bit to send, and the information of high possibility occurrence can suffer discontinuous transmission (DTX) and have.That is to say, be higher than out of Memory if be indifferent to the possibility occurrence of information, non-service dispatch Node B just is not indifferent to information with " 0 " value representation by do not send scheduling grant on physical channel, and uses "+1 " or " 1 " value to send decline information and critical message respectively on physical channel.Yet, if being higher than, the possibility occurrence of decline information or critical message is indifferent to information, having the highest generation so may new information can suffer discontinuous transmission.
If there are two or more non-service dispatch Node B, UE just receives two or more scheduling grant so.In this case, this UE is in the following embodiments by making up to determine final scheduling grant with these two or more scheduling grant.
In the embodiment of " OR-of-Worst (the poorest-or) ", if any one of the scheduling grant that receives is decline information, then UE is defined as final scheduling grant to descend, if and any one of the scheduling grant that receives be critical message, then UE is defined as final scheduling grant critical.Otherwise if all scheduling grant that receive all are to be indifferent to information, then UE is defined as final scheduling grant to be indifferent to.
In weighted array embodiment, this UE will make up with the weighting that is assigned to the Node B relevant with them and with multiplied result from the received scheduling grant of a plurality of non-service dispatch Node B is on duty, to produce the scheduling grant of weighted array.After this, this UE whether represent according to the scheduling grant of this weighted array be indifferent to, decline or critically determine final scheduling grant.Here, the scheduling grant value that is used to multiply by to the specified weighting of each Node B is the hard decision value of representing the soft-decision-value of actual number or representing an integer.
From describing, the front is understandable that embodiments of the invention provide a kind of and for uplink packet sends when carrying out rate scheduling the UE that is arranged in soft handover area is carried out effective apparatus and method of dispatching in using the asynchronous WCDMA communication system of E-DCH.In addition, embodiments of the invention also provide a kind of apparatus and method that are used for selecting in a plurality of Node B of the active set that belongs to UE by service wear deferred message, UL load condition information and HARQ information the service dispatch Node B.In addition, embodiments of the invention also provide a kind of apparatus and method, and wherein UE will send to a plurality of nodes that are included in its active set about the information of selected service dispatch Node B.
Although by illustrating and described the present invention with reference to the embodiment of particular exemplary wherein, those skilled in the art can be understood that, can under not breaking away from, make multiple change to form of the present invention and details by the situation of appended claim to the defined spirit and scope of the present invention.
The application requires to submit in Korea S Department of Intellectual Property respectively on May 4th, 2004 and on August 6th, 2004 according to 35U.S.C. § 119 (a), assigned serial number is the priority that 2004-31553 and 2004-62162 and both titles are all two applications of the apparatus and method of soft handover user equipment selection service dispatch sub-district " in the uplink packet transmitting system for ", and the whole contents of each is incorporated into this with it by reference here.

Claims (45)

  1. One kind by in the mobile communication system of the system for uplink packet data service that support to strengthen because soft handover and send the method for system for uplink packet data with the subscriber equipment (UE) that a plurality of sub-districts communicate, this method may further comprise the steps:
    Be used to the service dispatch sub-district of this UE scheduling uplink packet data service according at least one selection in downlink path-loss information, uplink load state information and affirmation (ACK) the rate information;
    The information of the selected service dispatch of expression sub-district is offered a plurality of sub-districts;
    Selected service dispatch sub-district from a plurality of sub-districts and unselected non-service dispatch sub-district receive and are used for the speed License Info that system for uplink packet data sends; With
    According to this speed License Info system for uplink packet data is sent to a plurality of sub-districts.
  2. 2. the method for claim 1, wherein said system for uplink packet data service is to realize by the up-link (E-DCH) of the enhancing of Wideband Code Division Multiple Access (WCDMA) (WCDMA) system.
  3. 3. the method for claim 1, wherein said downlink path-loss information are calculated as the difference between the transmitted power of received signal code power of being measured by the public control pilot channel (CPICH) that each sent in a plurality of sub-districts (RSCP) and CPICH.
  4. 4. on behalf of the heat of a plurality of sub-districts, the method for claim 1, wherein said uplink load state information increase (RoT) value, and UE receives this value by broadcast channel (BCH) or dedicated channel (DCH) from a plurality of sub-districts.
  5. 5. the method for claim 1, the wherein said ACK information of leading are calculated as in a plurality of sub-districts each at the ACK that is received for the system for uplink packet data service with do not confirm ACK ratio in (NACK).
  6. 6. the method for claim 1, wherein select step may further comprise the steps: to lead at least two weighted sums that calculate a plurality of sub-districts in the information by applying predetermined downlink path-loss information, uplink load state information and the ACK of being weighted to, and select to have the sub-district of limit priority as the service dispatch sub-district according to this weighted sum.
  7. 7. the method for claim 1 is wherein selected step to comprise by order and is used the step that downlink path-loss information, uplink load state information and the ACK information of leading are selected the service dispatch sub-district.
  8. 8. the method for claim 1 wherein provides step to comprise by Dedicated Physical Control Channel (DPCCH) and will represent that the sub-district ID of selected service dispatch sub-district sends to the step of a plurality of sub-districts.
  9. 9. the method for claim 1, the Dedicated Physical Control Channel (E-DPCCH) that wherein provides step to comprise the enhancing by being used for the system for uplink packet data service will represent that the sub-district ID of selected service dispatch sub-district sends to the step of a plurality of sub-districts.
  10. 10. the method for claim 1, the protocol Data Unit (MAC-e PDU) that wherein provides step to comprise the media interviews control-enhancing by being used for the system for uplink packet data service will represent that the sub-district ID of selected service dispatch sub-district sends to the step of a plurality of sub-districts.
  11. 11. the method for claim 1, wherein forwarding step may further comprise the steps:
    Determine final scheduling grant by the speed License Value that makes up the representative speed License Info that receives from non-service dispatch sub-district;
    If this final scheduling grant representative " decline ", the uplink rate that so just will be used for the system for uplink packet data service reduces a step;
    If this final scheduling grant is not represented " decline " or do not received the speed License Value from non-service dispatch sub-district, so just control uplink rate according to the speed License Info that receives from the service dispatch sub-district; And
    Use this uplink rate to send system for uplink packet data to a plurality of sub-districts.
  12. 12. method as claimed in claim 11, if wherein any one representative " decline " from the speed License Value that non-service dispatch sub-district receives, this UE is defined as " decline " with final scheduling grant so.
  13. 13. method as claimed in claim 11, if wherein by will be scheduled to weighting be applied to the corresponding sub-district of speed License Value that receives from non-service dispatch sub-district on the weighted sum representative " decline " of the scheduling grant calculated, this UE is defined as " decline " with final scheduling grant so.
  14. 14. the method for claim 1, wherein forwarding step may further comprise the steps:
    Determine final scheduling grant by combination from the speed License Value of the representative speed License Info of non-service dispatch sub-district reception;
    If this final scheduling grant representative " decline ", the uplink rate that will be used for the system for uplink packet data service so reduces a step;
    If this final scheduling grant is represented " being indifferent to " or is not received the speed License Value from non-service dispatch sub-district, so according to the speed License Info control uplink rate that receives from the service dispatch sub-district;
    If this final scheduling grant representative " critical " is so by using predetermined reference value to come perhaps uplink rate to be reduced a step according to the speed License Info control uplink rate that receives from the service dispatch sub-district based on possibility; And
    Use this uplink rate to send system for uplink packet data to a plurality of sub-districts.
  15. 15. method as claimed in claim 14, if any one speed License Value representative " decline " that wherein receives from non-service dispatch sub-district, this UE is defined as " decline " with final scheduling grant so, if any one speed License Value representative " critical ", this UE is defined as " critical " with final scheduling grant so, if all speed License Values are all represented " being indifferent to ", this UE is defined as " being indifferent to " with final speed permission so.
  16. 16. method as claimed in claim 14, wherein this UE according to by will be scheduled to weighting be applied to the corresponding sub-district of speed License Value that receives from non-service dispatch sub-district on the weighted sum of the scheduling grant calculated final scheduling grant is defined as " decline ", " critical " or " being indifferent to ".
  17. 17. subscriber equipment (UE) device that is used for sending system for uplink packet data when the mobile communication system of the system for uplink packet data service of supporting to strengthen communicates owing to soft handover and with a plurality of sub-districts, this device comprises:
    Service dispatch cell selecting device is used for being used to according at least one selection of downlink path-loss information, uplink load state information and affirmation (ACK) rate information the service dispatch sub-district of this UE scheduling uplink packet data service;
    The control information transmitter is used for the identifying information of the selected service dispatch of representative sub-district is sent to a plurality of sub-districts; And
    Data transmitter, be used for receiving the speed License Info that is used for the system for uplink packet data transmission, and system for uplink packet data sent to a plurality of sub-districts according to this speed License Info from the selected service dispatch sub-district and the unselected non-service dispatch sub-district of a plurality of sub-districts.
  18. 18. device as claimed in claim 17, wherein said system for uplink packet data service are to realize by the up-link (E-DCH) of the enhancing of Wideband Code Division Multiple Access (WCDMA) (WCDMA) system.
  19. 19. device as claimed in claim 17, wherein said downlink path-loss information are calculated as the difference between the transmitted power of received signal code power of being measured by the public control pilot channel (CPICH) that each sent in a plurality of sub-districts (RSCP) and CPICH.
  20. 20. on behalf of the heat of a plurality of sub-districts, device as claimed in claim 17, wherein said uplink load state information increase (RoT) value, and UE receives this value by broadcast channel (BCH) or dedicated channel (DCH) from a plurality of sub-districts.
  21. 21. device as claimed in claim 17, the wherein said ACK information of leading are calculated as in a plurality of sub-districts each at the ACK that is received for the system for uplink packet data service with do not confirm ACK ratio in (NACK).
  22. 22. device as claimed in claim 17, wherein said service dispatch cell selecting device leads at least two weighted sums that calculate a plurality of sub-districts in the information by applying predetermined the downlink path-loss information that is weighted to, uplink load state information and ACK, and selects to have the sub-district of limit priority as the service dispatch sub-district according to this weighted sum.
  23. 23. device as claimed in claim 17, wherein said service dispatch cell selecting device is used downlink path-loss information, uplink load state information and the ACK information of leading by order and is selected the service dispatch sub-district.
  24. 24. device as claimed in claim 17, wherein said control information transmitter will represent that by Dedicated Physical Control Channel (DPCCH) the sub-district ID of selected service dispatch sub-district sends to a plurality of sub-districts.
  25. 25. the Dedicated Physical Control Channel (E-DPCCH) of device as claimed in claim 17, the wherein said control information transmitter enhancing by being used for system for uplink packet data service will represent that the sub-district ID of selected service dispatch sub-district sends to a plurality of sub-districts.
  26. 26. the protocol Data Unit (MAC-e PDU) of device as claimed in claim 17, the wherein said control information transmitter media interviews control-enhancing by being used for system for uplink packet data service will represent that the sub-district ID of selected service dispatch sub-district sends to a plurality of sub-districts.
  27. 27. device as claimed in claim 17, wherein said data transmitter is determined final scheduling grant by the speed License Value of the representative speed License Info that combination receives from non-service dispatch sub-district;
    If this final scheduling grant representative " decline ", the uplink rate that so just will be used for the system for uplink packet data service reduces a step;
    If this final scheduling grant is not represented " decline " or do not received the speed License Value from non-service dispatch sub-district, so just control uplink rate according to the speed License Info that receives from the service dispatch sub-district; And
    Use this uplink rate to send system for uplink packet data to a plurality of sub-districts.
  28. 28. device as claimed in claim 27, if wherein any one representative " decline " from the speed License Value that non-service dispatch sub-district receives, this data transmitter is defined as " decline " with final scheduling grant so.
  29. 29. device as claimed in claim 27, if wherein by will be scheduled to weighting be applied to the corresponding sub-district of speed License Value that receives from non-service dispatch sub-district on the weighted sum representative " decline " of the scheduling grant calculated, this data transmitter is defined as " decline " with final scheduling grant so.
  30. 30. device as claimed in claim 17, wherein said data transmitter is determined final scheduling grant by combination from the speed License Value of the representative speed License Info of non-service cell reception;
    If this final scheduling grant representative " decline ", the uplink rate that will be used for the system for uplink packet data service so reduces a step;
    If this final scheduling grant is represented " being indifferent to " or is not received the speed License Value from non-service dispatch sub-district, so according to the speed License Info control uplink rate that receives from the service dispatch sub-district;
    If this final scheduling grant representative " critical " is so by using predetermined reference value to come perhaps uplink rate to be reduced a step according to the speed License Info control uplink rate that receives from the service dispatch sub-district based on possibility; And
    Use this uplink rate to send system for uplink packet data to a plurality of sub-districts.
  31. 31. device as claimed in claim 30, if any one speed License Value representative " decline " that wherein receives from non-service dispatch sub-district, this data transmitter is defined as " decline " with final scheduling grant so, if any one speed License Value representative " critical ", this data transmitter is defined as " critical " with final scheduling grant so, if all speed License Values are all represented " being indifferent to ", this data transmitter is defined as " being indifferent to " with final speed permission so.
  32. 32. device as claimed in claim 30, wherein this data transmitter according to by will be scheduled to weighting be applied to the corresponding sub-district of speed License Value that receives from non-service dispatch sub-district on the weighted sum of the scheduling grant calculated final scheduling grant is defined as " decline ", " critical " or " being indifferent to ".
  33. 33. one kind receives method from the system for uplink packet data of UE by the Node B that communicates with the subscriber equipment of carrying out soft handover (UE) in the mobile communication system of the system for uplink packet data service that support to strengthen, this method may further comprise the steps:
    Receive the information represent selected service dispatch sub-district a plurality of sub-districts that this UE communicates with it from UE, wherein this service dispatch sub-district is to be selected according in downlink path-loss information, uplink load state information and affirmation (ACK) the rate information at least one by this UE;
    By selected service dispatch sub-district or unselected non-service dispatch sub-district the speed License Info that representative is assigned to the speed of system for uplink packet data transmission is sent to UE according to this service dispatch cell information; And
    According to this speed License Info from this UE receiving uplink grouped data.
  34. 34. method as claimed in claim 33, wherein the system for uplink packet data service is that the up-link (E-DCH) of the enhancing by Wideband Code Division Multiple Access (WCDMA) (WCDMA) system is realized.
  35. 35. method as claimed in claim 33, wherein said downlink path-loss information are calculated as the difference between the transmitted power of received signal code power of being measured by the public control pilot channel (CPICH) that each sent in a plurality of sub-districts (RSCP) and CPICH.
  36. 36. on behalf of the heat of a plurality of sub-districts, method as claimed in claim 33, wherein said uplink load state information increase (RoT) value, and UE receives this value by broadcast channel (BCH) or dedicated channel (DCH) from a plurality of sub-districts.
  37. 37. method as claimed in claim 33, the wherein said ACK information of leading are calculated as in a plurality of sub-districts each at the ACK that is received for the system for uplink packet data service with do not confirm ACK ratio in (NACK).
  38. 38. method as claimed in claim 33, the step that wherein receives the service dispatch cell information comprises the step that receives the sub-district ID of the selected service dispatch of expression sub-district by Dedicated Physical Control Channel (DPCCH) from this UE.
  39. 39. method as claimed in claim 33, the step that wherein receives the service dispatch cell information comprise by being used for receiving from this UE to the Dedicated Physical Control Channel (E-DPCCH) of the enhancing of link packet data service the step of the sub-district ID of the selected service dispatch of expression sub-district.
  40. 40. method as claimed in claim 33, the step that wherein receives the service dispatch cell information comprise the step of representing the sub-district ID of selected service dispatch sub-district by the protocol Data Unit (MAC-e PDU) of media interviews control-enhancings that is used for the system for uplink packet data service from this UE reception.
  41. 41. method as claimed in claim 33, wherein forwarding step comprises the step that sends the speed License Info of the specified speed of representative by the service dispatch sub-district.
  42. 42. method as claimed in claim 41, wherein forwarding step comprises the step that sends the speed License Info of representative " decline " or " being indifferent to " according to specified speed by non-service dispatch sub-district.
  43. 43. method as claimed in claim 41, wherein forwarding step comprises the step that sends the speed License Info of representative " decline ", " being indifferent to " or " critical " according to specified speed by non-service dispatch sub-district.
  44. 44. one kind receives device from the system for uplink packet data of UE by the Node B that communicates with the subscriber equipment of carrying out soft handover (UE) in the mobile communication system of the system for uplink packet data service that support to strengthen, this device comprises:
    The service dispatch sub-district, be suitable for receiving the information represent this service dispatch sub-district a plurality of sub-districts that this UE communicates with it from UE, wherein this service dispatch sub-district is to be selected according in downlink path-loss information, uplink load state information and affirmation (ACK) the rate information at least one by this UE, and the speed License Info that this service dispatch sub-district is suitable for representative is assigned to the speed that system for uplink packet data sends sends to UE;
    Non-service dispatch sub-district, be suitable for receiving the information represent the described service dispatch sub-district a plurality of sub-districts that this UE communicates with it from UE, wherein said service dispatch sub-district is to be selected according in downlink path-loss information, uplink load state information and affirmation (ACK) the rate information at least one by this UE, and this non-service dispatch sub-district is suitable for sending the speed License Info of representative " being indifferent to " or " decline ".
  45. 45. device as claimed in claim 44, wherein said " being indifferent to " abides by the information of the speed License Info of service dispatch sub-district for the described UE of indication.
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