Background technology
In the third generation (3G) wireless telecommunication system, a wireless transmitter/receiver unit (WTRU) has the ability that the application of multiple different service quality (QoS, Quality of Services) demand is carried out in support simultaneously.Be logic channel about application from wireless link key-course (RLC) individual data stream, these logic channels are controlled (MAC) layer interior mapping to transmission channel (TrCH) in medium accesses, each TrCH is associated with a specific QoS, and the logic channel with similar QoS demand is just videoed to the TrCHs that shares.
It is because of allowing the error protection of different brackets that but different TrCHs multitask to CCTrCH Coded Composite Transport Channels (CCTrCH), each TrCH have that a specified coding rate and the encoding rate rate in CCTrCH match.The TrCHs combination that is allowed in a CCTrCH Transmission Time Interval is defined by a transport format combination set (TFCS), and this TFCS is defined in TrCHs permission multitask combination in each CCTrCH TTI.
Among each TTI, this MAC is by selecting a transformat combination (TFC) in this TFCS or the configuration TFC subclass, it is selected to the transmission priority of each TrCH logic channel that TFCs is based on reflection, and the TFC selective rule is based on the transmission of maximization highest priority data.
This TFCS is configured to allow some TrCH data combination and does not allow other TrCH data combination, and this mechanism is in order to guarantee the minimum and maximum data transfer rate of each TrCH in CCTrCH.
Among each TTI, the TFCs in TFCS is examined to judge whether this TFCs can be supported by the ERP of this WTRU.The TFC that can not be supported can be regarded as at the power in excess state, and can be in the periodic transfer of a weak point, if can't satisfy transmit power needs in this cycle, then TFC can be blocked transmission, and some TFCs in " minimal set " can not be blocked.Transmission channel configuration, TFC selective rule and the minimal set of these TFCS all are the QoS that is used for keeping individual data stream.
Developed at present and enhancing cochain (EU) with transmission latency of being reduced in cochain and increase radio resource efficiency.A WTRU only provides an EU TrCH, because each WTRU only has an EU TrCH, therefore transformat (TFs) table of an EU TrCH is only arranged and can't differentiate the demand of Different Logic channel priority and QoS, the CCTrCH TFCS of configuration and TFC selective rule are suitably coordinated the transmission multitask in TTI, only just useful when the TrCHs that the logic channel that a plurality of TrCHs and shared QoS demand are provided is videoed extremely specific.Owing to only an EU TrCH arranged, these multitasks rules and to offer the QoS of individual data stream just invalid to EU.
In order suitably to keep the QoS demand of individual data stream, therefore just need for logic channel or reflection to the MAC-d stream that strengthens cochain medium accesses control (MAC-e) protocol Data Unit (PDUs), define new WTRU multitask rule.
Embodiment
After this, proprietary term " WTRU " comprises but is not limited to user's equipment, one and moves platform, fixing or moving user unit, a calling set or can operate any type of device under a wireless environment.When after this this paper mention proprietary term " Node B ", it comprises but is not limited to a base station, a platform controller, an access point or any type of interface arrangement under wireless environment.
Figure 1 shows that according to WTRU 100 calcspars of the utility model in order to the EU multitask.This WTRU comprises a rlc layer 102, a MAC-d entity 104, a MAC-e entity 106 and a PHY entity 108.This rlc layer 102, this MAC-d entity 104 and this PHY entity 108 are carried out the similar functions of WTRU in existing wireless telecommunication system.It should be noted that configuration shown in Figure 1 provides an example, and this MAC-d entity and the performed function of MAC-e entity can merge into an entity, and the function of entity can be implemented in more or less functional entity also among Fig. 1.
This rlc layer 102 comprises one or more RLC entity, and all the logic channel with specific is relevant for each, for example Dedicated Control Channel (DCCH) or special flow channel (DTCH).Each MAC-d stream has its relevant QoS attribute.This MAC-e entity 106 comprises a multitask function 106a and an EU TFC selection function 106b.This MAC-e entity to MAC-e PDUs, is selected a suitable TF for strengthening cochain dedicated channel (E-DCH) with this MAC-d stream multitask simultaneously.This PHY entity 108 is handled the MAC-ePDUs of wireless transmission.
This WTRU 100 is configured to support that the EU by single EU TrCH transmits.According to the utility model, the permission of one group of MAC-d stream (and/or logic channel) combination, it allows multitask in a MAC-e PDU, is each WTRU 100 definition.MAC-e PDU multitask rule is defined, and it is described can select for which data from MAC-d stream (and/or logic channel), and multitask to MAC-e PDU is to keep the QoS demand.This rule can be pre-defined by standard, or send a signal to WTRU 100 by radio network controller (RNC) by Radio Resource control (RRC) program.The RRC that sends combination of sets provides the ability of RNC control logic channel or corresponding MAC-d stream, has reached its specific QoS demand.
Be that convenient WTRU is in some MAC-d stream (and/or logic channel) combination that the transmission power limit state can not be blocked transmission yet, also can be defined to avoid the blockade of arbitrary MAC-d stream (and/or logic channel).Also can under the EU transmission assignment that does not need from Node B, allow the transmission of these combinations.
According to an execution mode of the present utility model, can multitask in a MAC-ePDU from each MAC-d stream (and/or logic channel), the PDUs quantity of every Transmission Time Interval (TTI) also can be configured.The PDUs quantity of every TTI is represented the data transfer rate of each channel, and for instance, all allow to make up one or more PDUs that can comprise from a particular logical channel, and it will guarantee always to serve this particular logical channel.
According to another execution mode of the utility model, but this combination of sets can be from the particular data rate definition of each multitask to the MAC-d of this MAC-e PDUs stream (and/or logic channel), combination of sets can also particular data rate in conjunction with/or do not define in conjunction with the particular data rate of other MAC-d stream (and/or logic channel).Data transfer rate from each MAC-d stream (and/or logic channel) can meet the data transfer rate that other other MAC-d flows (and/or logic channel) clearly, and in some combination, other channel can not transmit data.Combination also can be drawn the possible speed of each MAC-d stream (and/or logic channel) of identification, and allows this WTRU to select any known speed from other channel, and it can not surpass the physical channel or the transmission power limit of assigning.
In allowing combination of sets, the absolute or relevant priority multitask of definable rule is to keep suitable prioritization between MAC-d stream (and/or logic channel).According to absolute priority mechanism, the logic channel of higher-priority or MAC-d stream is always serviced before than the logic channel of low priority or MAC-d stream, and selected multitask combination is to support to gather interior highest priority data for the TFs of EU TrCH definition.
Perhaps, the logic channel or the combination of MAC-d stream of being disposed by the RRC signalling procedure can be better than absolute priority, the configurable logic channel or the permission combination of MAC-d stream in a MAC-e PDU of this RRC signal procedure, but core network is data of description size or the quantity of MAC-d PDUs also, and it allows to flow multitask to each MAC-e PDU by each logic channel or MAC-d.
According to relative priority mechanism, one weight mechanism is described so that suitably serve the low priority channel, it is each MAC-d stream (and/or logic channel) definition one weight, and the effective frequency range on E-DCH is given each logic channel or MAC-d stream according to the weight allocation of definition.The method allows data transfer rate to distribute on logic channel or corresponding MAC-d stream, and avoids the frequency range hunger (starvation) of low priority channel.
Allow combination of sets to be sent by the RRC program clearly, this RRC configuration allows this RNC control WTRU multitask to select, and it is unique to radio access bearer (RAB) demand.The specific permission combining and configuring of logic channel or MAC-d stream is with in each MAC-e PDU multitasking.
In each EU TTI, WTRU monitors the state that MAC-d stream (and/or logic channel) allows combination continuously, and selects a suitable transmission combination according to monitor state.If the transmit power needs of a particular combinations surpasses the dump power demand of permission WTRU E-DCH transmission,, and should combination can be blocked by the E-TFC selection just then this combination is in a power in excess state.May need several E-DCH TTIs the launch time of detecting and blocking MAC-d stream (and/or logic channel) combination.When transmitting power is enough, has a similar mechanism and be incorporated into this permission combination of sets in order to give back this.
Be that convenient WTRU is in some MAC-d stream (and/or logic channel) combination that the transmission power limit state also can not block transmission, also can be defined to avoid the blockade of any MAC-d stream (and/or logic channel), under need not assigning, also can allow the transmission of these combinations from the EU channel of Node B.Because an EU TrCH is only arranged, and the TFCs collection of a plurality of TrCHs of undefined correspondence, only be TFs table of single EU TrCH definition, therefore need be in minimum centralized definition MAC-d stream (and/or logic channel) combination, this minimal set can not be blocked.For instance, E-DCH minimal set definable always makes can be from any MAC-d stream or logical tone as at least one MAC-d PDU of transmission, promptly convenient E-DCH can with this dump power be limited.
In order to can comprise the combination of every MAC-d stream (and/or logic channel) in every TTI multitask MAC-d stream (and/or logic channel) to MAC-e PDUs rule, it comprises the I load of a logic channel or MAC-d stream, and video to other logic channel of EU TrCH or MAC-d stream and do not have data, these combination of sets may be defined as minimal set, this can be a signal and sends radio bearer, to guarantee that signal is sent to this Node B in a Power Limitation state.
Under existing 3GPP standard, TFC is that a TrCH is given in configuration, and it is provided in CCTrCH, and minimum on the TrCH may be transmitted and other TrCHs does not have transfer of data, and these TFCs always are allowed to transmit to avoid blocking the possibility of separate channel.Only there is being a TrCH to support that aspect the EU of many logic channels or MAC-d stream, single a reservations TFC is not enough, concerning EU TrCH, needs several EU TFs or the TFCs minimal set to support that multitask is made up.EU TF or TFC comprise the minimum possibility load transmission configuration that allows a logic channel or MAC-d stream.
When WTRU is in the power-limiting state, its with this EU traffic load be reduced to the EU channel that is received from Node B assign allow down, the indication of power-limiting state just can be passed to this Node B with this EU.This indication can send message (for example new information assembly) by a signal clearly and send, and this WTRU can be for the grade of this WTRU ERP.
Node B can not have this WTRU of misinterpretation and whether is in a Power Limitation state, and this Node B can detect this WTRU Power Limitation state by channel assignment that relatively is sent to this WTRU and the correspondence transmission that is received from WTRU.Surpass transmission if this channel is assigned, and WTRU continues on the speed that reduces transmission or indicate it to have more multidata needs to send, just then this Node B detects this WTRU Power Limitation state and takes suitable moving.
Figure 2 shows that according to program 200 flow charts of the utility model in order to the EU multitasking.One WTRu is configured to support the EU transmission by a single EU TrCH.At first define the permission combination of sets of one group of MAC-d stream (and/or logic channel) for each WTRU, it allows multitasking to MAC-e PDU (step 202).The transmission data are handled at rlc layer by at least one RLC entity, and transfer to a MAC-d entity (step 204) via at least one logic channel.These transmission data are videoed on a MAC-d entity to one or more MAC-d stream (step 206), and each MAC-d stream is associated with specific QoS attribute.From allow combination of sets, select the combination (step 208) of a kind of MAC-d stream (and/or logic channel).From the data based selected combination multitasking of this MAC-d stream to MAC-e PDUs (step 210).This MAC-e PDU transfers to physical layer to carry out physical layer process (step 212) via an EUTrCH.
Figure 3 shows that this entity comprises the mac function except that control signal according to the embodiment calcspar of WTRU MAC-e entity 1-6 of the present utility model.Figure 3 shows that three function squares, yet configuration shown in Figure 3 provides as example, and should be noted that and not break away from other configuration of enforcement under the technology of the present utility model, this function square can or separate with more or less function combinations of blocks, the order of function square also can different order change, and this function square can be carried out simultaneously or in proper order.
Enter the first function square 1061 of this MAC-e entity 106 from the data of the corresponding MAC-d stream of logic channel meeting, this first function square 1061 is from the permission combination of MAC-d stream (and/or logic channel), and decision MAC-d flows the subclass of (and/or logic channel) combination.Optionally, this first function square 1061 can be according to the possible speed of each MAC-d stream (and/or logic channel) of RRC configuration decision.
The second function square 1062 is the subclass decision effective power and the E-TFCs of MAC-d stream (and/or logic channel) combination, and the effective power of E-DCH also can be a configuration parameters.Optionally, the second function square 1062 can decide this E-TFC based on the combination minimal set that can not be blocked transmission.
The 3rd function square 1063 produces MAC-e PDUs with multitasking MAC-d stream according to a pre-set criteria, and for example configuration logic channel or MAC-d stream priority is with maximization transmission highest priority data.
Although feature of the present utility model and assembly are all described in the particular combinations mode in embodiment, but each feature or assembly can use alone among the embodiment, and do not need further feature or combination of components with better embodiment, or with/do not do various combination with further feature of the present utility model and assembly.