CN201204594Y - Wireless transmit-receive unit and medium access control unit supporting switch between districts - Google Patents

Abstract

Disclosed are an optimized wireless transmitting/receiving unit (WTRU) and a medium access control (MAC) unit for controlling the switching process between a version 6 (R6) district and a version 7(R7) district of universal land radio access (UTRA). When the wireless transmitting/receiving unit (WTRU) is moving between the R6 district and the R7 district, or between the R7 districts, a switch from a source Node-B to a target Node-B is actuated. In the R7 district, the enhancement type medium access control (MAC) function includes variable radio link control (RLC) protocol data unit (PDU) size and high speed MAC (MAC-hs) subsection, and the multiplexing of priority queues. After switching, the MAC layer and/or the RLC layer are/is reconfigured or reset based on the function supported by the target Node-B.

Description

Support wireless transmission receiving element and the medium access control unit that switch the minizone

Technical field

The application relates to radio communication.

Background technology

A part of purpose that high-speed packet inserts (HSPA) evolution comprises higher data rate, higher power system capacity and coverage rate, the enhancing support for Packet Service, the delay of reduction, the operation cost and the back compatible of reduction.Realize that these purposes require Radio interface protocols and network configuration are carried out evolution.More particularly, realize that these purposes need carry out one group of enhancing and structural change to layer 2 (L2) (be radio link control (RLC) and medium access control (MAC)) is functional.

The enhancing of some L2 comprises variable (flexible) rlc protocol data cell (PDU) size, high speed MAC (MAC-hs) segmentation/cascade and multiplexing.Insert in (UTRA) version 6 (R6) at universal terrestrial radio, affirmation mode (AM) RLC entity can only use fixing RLC PDU size.In addition, the cascade of MAC-d PDU can only be supported in the MAC-hs sublayer among the Node-B.The L2 enhancing of UTRA version 7 (R7) has caused very big RLC/MAC to change to the R6 characteristic.

The change of enhancement mode MAC-hs (MAC-ehs) structure is comprised the increase of logical channel identifier (LCH-ID) multiplexing (MUX) entity in the UTRAN side.LCH-ID MUX entity is multiplexed with Priority Queues with logic channel.The MAC-ehs structure further comprises the Priority Queues fragmentation feature and the MAC-ehs Payload Unit is multiplexed with MAC-ehs PDU from different Priority Queues.

In wireless transmitter/receiver unit (WTRU) side the change of MAC-ehs structure is comprised the decomposition to the MAC-ehs Payload Unit from MAC-ehs PDU.Further, after reordering, the MAC-ehs Payload Unit is forwarded to LCH-ID demultiplexing entity.This LCH-ID demultiplexing entity logic-based Channel Identifier and the MAC-ehs Payload Unit is routed to correct reorganization entity.Also comprise the reorganization entity in the MAC-ehs of WTRU structure, this reorganization entity is recombinated to the MAC-ehs service data unit (SDU) of segmentation and is forwarded to whole MAC-ehs SDU more high-rise.

At present, when setting up via radio resource control (RRC) signaling or reshuffling radio bearer, there is information element (IE) " radio bearer (RB) map information "." RB map information " comprises about corresponding to the RLC example of radio bearer (RB) and the information of transmission channel.

New information element (IE) may be added to IE " RB map information ", and described new IE indicates the logic channel of RLC example whether to support variable RLC PDU, and perhaps whether media access control sublayer supports MAC-hs or MAC-ehs.For the purpose of this utility model, we are called these IE " descending (DL) RLC configuration " and " DL MAC-hs configuration ".It is identical being mapped to that MAC-hs configuration on all RB of high-speed downlink shared channel (HS-DSCH) all needs, otherwise can cause invalid configuration.

In HSPA, monitor high speed shared channels by the WTRU in independent sub-district (being serving high speed downlink shared channel (HS-DSCH) sub-district).Because mobility, when WTRU when a sub-district moves to another, WTRU need be by switching to new service HS-DSCH sub-district and stopping carrying out the Serving cell change with communicating by letter of old service HS-DSCH sub-district.In the Node-B repositioning process, the switching from old Node-B (being source Node-B) to new Node-B (being purpose Node-B) generation Node-B.

When service Node-B changed, target Node-B need begin the transmission of data in new configuration.Described switching can occur in to be supported within the evolved HSPA Node-B that L2 strengthens, perhaps to/switch from having or do not have the sub-district that L2 strengthens.For both of these case, WTRU must be able to carry out the switching according to new configuration, and data degradation is minimized.

In traditional system (being the R6 system), when switching generation, radio resource control (RRC) message can be carried MAC layer reset designator.Especially, when between Node-B or the Node-B inscribe change when living, the data among the MAC-hs among the Node-B of source are deleted, and the MAC-hs among the WTRU need be reset.When receiving the replacement designator, WTRU can carry out following a series of functions:

1) empties the soft buffer of HARQ for the automatic repeat requests of all mixing that are configured (HARQ) process;

2) stop all activities version timer (T1) that reorders, and all timer T1 are set to their initial value;

3) transmit for the next one of each HARQ process that is configured, with 0 value begin to transmit Sequence Number (TSN);

4) variable R cvWindow_UpperEdge and next_expected_TSN are initialized as their initial value;

5) decompose all MAC-hs PDU in the resequencing buffer, and all MAC-d PDU are passed to the MAC-d entity; And

6) empty resequencing buffer.

Strengthen when having introduced new L2, need the new process of definition optimize and minimize between the R7 sub-district or R7 sub-district and R6 sub-district between transfer period between data degradation.Especially, needing to revise the process of handling replacement MAC-hs entity strengthens to support new L2.

In addition, can not suppose that all R6 Node-B will upgrade simultaneously with R7 Node-B.Therefore, the switching meeting between R6 and the R7 sub-district frequently takes place.Because the functional change of RLC and MAC, must define with the least disadvantage of quality and data and carry out method in the switching between these sub-districts.Especially, in the WTRU side, MAC-hs and RLC must carry out functional change between transfer period.

The utility model content

A kind of optimized device of handoff procedure that is used to control between UTRA R6 (being lower level) sub-district and UTRA R7 (the being higher level) sub-district is disclosed.When WTRU between R6 sub-district and the R7 sub-district or in the R7 moving between cells time, start switching from source Node-B to purpose Node-B.In the R7 sub-district, enhancement mode MAC function comprises variable RLC PDU size and MAC-hs segmentation, and the multiplexing of the different Priority Queues among the WTRU is supported.The change that takes place in WTRU is to result from the fact of this WTRU in R6 and R7 moving between cells.As WTRU during in such moving between cells, network must be reshuffled this WTRU with new configuration.After switching, based on the function of being supported by target Node-B, MAC layer and/or rlc layer are reshuffled or are reset.

Description of drawings

By description below in conjunction with accompanying drawing, can understand the utility model in more detail, wherein:

Figure 1A is the example block diagram at the WTRU of R6 and R7 moving between cells, and it is configured to moving with new RLC and MAC-hs sublayer when receiving switching message during the Serving cell change process;

Figure 1B is the detail drawing of the MAC unit among the WTRU of Figure 1A; And

Fig. 2 is the flow chart of the WTRU handoff procedure implemented in the WTRU of Figure 1A.

Embodiment

The term wireless transmitter/receiver unit of hereinafter quoting (WTRU) is including, but not limited to the subscriber equipment that can work in wireless environment of subscriber equipment (UE), mobile radio station, fixing or mobile contracted user unit, beep-pager, cell phone, PDA(Personal Digital Assistant), computer or any other type.The term of hereinafter quoting " Node-B " including, but not limited to the base station, site controller, access point (AP) or the interface equipment that can in wireless environment, work of any other type.

Hereinafter, the R7 sub-district comprises Node-B and the RNC with improved L2 characteristic.Run through the utility model, the R7 sub-district can refer to support the more highest version of improved L2.Hereinafter, the R6 sub-district comprises Node-B and the RNC that does not support improved L2 characteristic.This can comprise R7Node-B and any previous third generation partner program (3GPP) version with L2 characteristic.R7MAC-hs in the utility model refers to enhancement mode MAC-hs (being MAC-ehs).

Term RLC resets and refers to that also RLC rebuilds.These terms can be used alternatingly.

Term hereinafter runs through that whole specification uses and by simple defining.The MAC-ehs Payload Unit is MAC-ehs SDU or is included in MAC-ehs SDU segmentation among the MAC-ehs PDU.The MAC-ehs reordering PDU is the one group of MAC-ehs Payload Unit that belongs among the MAC-ehs PDU of identical Priority Queues.Strengthening the sub-district is the sub-district of supporting that L2 strengthens.Non-enhancing sub-district is the sub-district of not supporting that L2 strengthens.

Change for MAC-hs or MAC-ehs reset process, MAC-hs or MAC-ehs reconfiguration course and RLC reconstruction evaluation process is disclosed.

Disclosed herein is a kind of optimization about handoff scenario, be used to support between the R7 sub-district and R6 and R7 sub-district between the MAC-hs of switching and the method and apparatus of the reset process of RLC entity.Should be understood that R6 sub-district or R6 Node-B are meant sub-district and the Node-B that does not support improved L2 characteristic, as MAC segmentation and variable RLC PDU size.Disclosed method and apparatus is applicable to up (UL) and descending (DL) link and other wireless technologys, as Long Term Evolution (LTE) and other planar structure systems such as R8 Wideband Code Division Multiple Access (WCDMA) (WCDMA).

Figure 1A is the example block diagram of WTRU 100, and this WTRU 100 is in R6 and R7 moving between cells, and is configured to moving with new RLC and MAC-hs sublayer when receiving when switching message during the Serving cell change process.Shown in Figure 1A, WTRU 100 comprises RRC unit 105, RLC unit 10, MAC unit 115 and physics (PHY) layer 1 unit 120.Can reshuffle RRC message or physical channel via radio bearer reconfiguration RRC message, transmission channel reshuffles RRC message and Serving cell takes place changes.

WTRU 100 runs in the wireless communication system, and this wireless communication system comprises purpose Node-B, source Node-B, control RNC (CRNC) and source RNC (SRNC) (not shown).Described SRNC can comprise RLC unit and RRC unit (not shown).

Switch the sub-district in the R7

In the R7 structure, MAC-hs comprises new function, and described new function is included in the MAC-hs segmentation of Priority Queues different among the Node-B and multiplexing.The RLC function is retained in the radio network controller (RNC) and supports variable PDU size.R7 MAC-hs header is obviously different with R6 MAC-hs header.In LTE and other WCDMA planar structure systems, the RLC function is in Node-B.In UL, the RLC function is arranged in WTRU.

When switching generation, the MAC-hs entity among the Node-B of source is deleted, and new MAC-hs entity is set up in target Node-B.When new configuration took place, for target Node-B, maximum RLC PDU size can be adjusted.This is to finish by the combination of one of following method or following method: 1) be Initial R LC PDU size assigns default values; 2) keep existing RLC PDU size; Perhaps 3) channel condition of based target Node-B is provided with new RLC PDU size.This is applicable to that Node-B is sent to maximum RLC PDU size the situation of the RLC entity among the RNC with signal.The CQI (CQI) that is sent to target Node-B between transfer period can provide the good estimation of channel condition.Conversely, target Node-B can provide feedback by the RLC entity in RNC, with the RLC PDU size after before the transmission that is enabled on the new sub-district renewal being set.Any traditional method may be used to provide feedback information to target Node-B during service HS-DSCH cell change.

When having set up new MAC-hs in target Node-B, preferably, the MAC-hs of WTRU side is by synchronous with Destination MAC-hs.Therefore, preferably, WTRU also resets to the MAC-hs entity among the WTRU.

Because the changing function of MAC-hs sublayer, R6 reset process are modified to be supported in and receive after the HARQ fact that MAC-hs PDU decomposition function was used before reordering.After reordering, recombination function is added into existing decomposition function.

Traditional R6 MAC-hs reset process is to be passed to MAC-hs SDU more high-rise and that the discarded part branch receives and to change by decomposing all the MAC-hs PDU in the resequencing buffer, segmentation grouping, the MAC-hs SDU that all are complete that reorganization can successfully be reassembled as MAC-hs service data unit (SDU).

Especially, because the change of structure, the MAC-ehs reset process is upgraded in suggestion.At given activationary time or in instruction time, WTRU must handle the MAC-ehs reordering PDU of waiting in resequencing buffer.All MAC-ehs reordering PDU must be decomposed or are the MAC-ehs Payload Unit by demultiplexing.The MAC-ehs Payload Unit then is passed to recomposition unit.After recomposition unit was handled all MAC-ehs Payload Unit and the MAC-ehs Payload Unit after the segmentation is reassembled as the MAC-ehs SDU that can be recombinated, described recomposition unit must guarantee that all stored residue MAC-hs SDU segmentations are all deleted from described recomposition unit.At last, complete PDU is passed to more high-rise in respective logical channels or the MAC-d/c stream.

For example, the MAC-ehs reset process can be taked the MAC-ehs structure of following form.If request replacement MAC unit, upper strata 115, by more high-rise indicated activationary time, WTRU 100 will:

A) for all HARQ processes that is configured, empty the soft buffer of HARQ;

B) stop all activities version timer (T1) that reorders, and all timer T1 are set to their initial value;

C) transmit for the next one on each HARQ process that is configured (and each Priority Queues), with 0 value beginning TSN;

D) variable R cvWindow_UpperEdge and next_expected_TSN are initialized as their initial value;

E) all reordering PDU in the reorder queue are passed to LCH-ID demultiplexing unit and/or demultiplexing MAC-ehs Payload Unit, and logic-based channel indicator and they are routed to correct recomposition unit;

F) carry out by the reorganization of the MAC-ehs SDU of segmentation, and be passed to complete MAC-ehs SDU (MAC PDU) more high-rise;

G) from recomposition unit, abandon all stored reordering PDU (or MAC-hs SDU segmentation);

H) empty reorder queue; And

I) if start the MAC-hs replacement owing to the upper strata receives IE " MAC-hs replacement designator ", indication is mapped in all answer-modes (AM) RLC entity generation status report on the HS-DSCH alternatively.

Can there be different MAC-ehs structures, wherein then be SDU decomposition function, reorganization entity behind the reordering function, and be LCH-ID demultiplexing entity at last.Decomposition function can be the part of reorganization entity, only has the reorganization entity in this case in the MAC-ehs structure.For example, the MAC-ehs reset process can be taked following form to this MAC-ehs structure.

Figure 1B is the detail drawing of the MAC unit 115 among the WTRU 100 of Figure 1A.Shown in Figure 1B, MAC unit 115 comprises a plurality of LCH- ID demultiplexing unit 130A and 130B, recomposition unit 135A and 135B, reorder queue 140A and 140B, reorder queue allocation units 145, resolving cell 150 and HARQ unit 155. Reorder queue 140A and 140B are used to carry out to the reordering of the MAC-ehs PDU that receives, thereby can carry out reorganization, and can be in order with data passes to more high-rise.HARQ unit 155 comprises the soft buffer (not shown) of at least one HARQ.

Referring to Figure 1B, if upper strata request replacement MAC-ehs entity, at the activationary time by more high-rise indication, WTRU 100 incites somebody to action:

A), empty the soft buffer of HARQ in the HARQ unit 155 for all HARQ processes that is configured;

B) stop all activities version timer (T1) that reorders, and all timer T1 are set to their initial value;

C) transmit for the next one on each HARQ process that is configured (and each Priority Queues), with 0 value beginning TSN;

D) variable R cvWindow_UpperEdge and next_expected_TSN are initialized as their initial value;

E) all reordering PDU among reorder queue 140A and the 140B are passed to resolving cell 150, and/or;

F) resolving cell 150 is decomposed into MAC-hs SDU or MAC-hs SDU segmentation with all reordering PDU, and they are passed to recomposition unit 135A and 135B, or;

G) if only there is recomposition unit 135, then the data from reorder queue are passed to recomposition unit 135. Recomposition unit 135A and 135B carry out the reorganization to the MAC-ehs SDU after the segmentation, and complete MAC-ehs SDU is passed to LCH- ID demultiplexing unit 130A and 130B, each demultiplexing unit is passed to correct logic channel or MAC-d/c stream with complete SDU;

H) from recomposition unit 135A and 135B, abandon all stored reordering PDU (or MAC-hs SDU segmentation); And

I) empty and reorder row 140A and 140B.

Alternatively, under the situation about switching in Node-B, (i.e. switching between the section of identical Node-B) can carry out above-mentioned MAC-hs reset process.In this case, as described in traditional R6 system, carrying out switching.

Switching between R6 and the R7 sub-district

L2 strengthens sub-district (being the R7 sub-district) and supports variable RLC PDU size, has fixing RLC PDU size but not strengthen sub-district (being the R6 sub-district).This means when whereabouts R7 sub-district taking place and during from the switching of R7 sub-district, affected RLC entity need be changed to old RLC entity by reprovision among RNC and the WTRU.In addition, need reshuffle the MAC-hs sublayer, and support new or old function with the correct header format of decoding.

Rebuild the RLC entity if desired, can produce great data degradation.Therefore wish this data degradation is minimized.

The sequence of events of handoff procedure

Fig. 2 is the flow chart of the WTRU handoff procedure 200 of enforcement in the WTRU 100 of Fig. 1.In step 205, the RRC unit 105 among the WTRU 100 receives the RRC switching command, to start handoff procedure.In step 210,105 order physics (PHY) layer 1 (L1) unit 120, RRC unit are built up in the new radio link of indicating in the RRC switching command.This sequence of events is all similar with conventional procedure up to MAC-hs replacement step.

In step 215, the RRC unit 105 MAC unit in WTRU 100 115 as required sends MAC-hs replacement and/or MAC-hs reconfiguration request.If asked MAC-hs to reshuffle, then following detailed explanation ground is carried out MAC-hs and is reshuffled.Can be expanded alternatively with indication MAC-hs for the MAC-hs replacement designator parameter of the RRC unit 105 of MAC primitive (primitive) and to reshuffle.

MAC-hs resets and/or MAC-hs reshuffles (step 220) in case MAC unit 115 is carried out, and reorder queue 140A in the MAC unit 115 and 140B are cleared (step 225), then can send RLC status request message (step 230) from MAC unit 115 to RLC unit 110.In step 235, after each RLC PDU was handled by RLC unit 110, RLC unit 110 then generated status report for all answer-modes (AM) RLC example that is mapped to HS-DSCH.Alternatively, there is not the RLC status request message to be sent to RLC unit 110.

If asked the RLC replacement, then RRC unit 105 sends to RLC unit 110 and rebuilds request message (being RLC replacement message) (step 240).Then, as the result of this request, reset according to come operating part or the whole RLC that describe in detail below.For RLC replacement indication, the following option is feasible:

1) there is not the RLC indication to be sent to RLC unit 110;

2) the reset all indication is sent to RLC unit 110; Perhaps

3) part is reset to indicate and is sent to RLC unit 110.

RLC resets/reshuffles, and indication can RLC (CRLC)-Config-Req primitive is next be notified with signal by controlling, and perhaps comes clear and definite notifying with signal by MAC-hs with the MAC SDU that is forwarded at last.Replacedly, the RLC indication of resetting/reshuffle can be notified with signal with STATUS-Report-Req by MAC-hs.Before status report or RLC replacement, the RLC that preferably carries out all SDU that are cleared handles.

If what carry out is asynchronous switching, once receiving RRC message execution in step 220-230.If what carry out is synchronous switching, at given activationary time execution in step 220-230.

Send the method for signal to WTRU

Change in case service Node-B is carried out in the RRC among RNC decision, if be suitable for, RNC must notify WTRU or to receive the replacement of RLC entity/reshuffle to the MAC-hs sublayer.Preferably, carry out the combination of one of the following option or the following option:

The RRC that RNC sends the combination of obviously indicating one of following message or following message switches message:

1a) MAC-hs resets or reshuffles.Added bit (being that MAC-hs reshuffles designator) is added into the RRC message that R6 afterwards or R7MAC-hs operation are switched in indication.

1b) in order to the RLC replacement designator of specified portions or reset all.

1c) in order to indicate two one of following bits:

I) MAC-hs resets;

Ii) MAC-hs reshuffles;

Iii) RLC resets; Or

Iv) do not need action.

1d) indication takes place from R6 to R7 or the additional field of opposite cell change; Or

1e) except traditional MAC-hs replacement designator, do not have additional information to be added into RRC and switch message.

Preferably, WTRU decides and must take what action based on the combination of one of the following option or the following option:

If 2a) MAC-hs reshuffles or RLC resets and to be notified with signal clearly, (being about to above-mentioned 1a, 1b or 1c sends with signal), then WTRU carries out being instructed to of task according to said sequence.

Be set to TRUE (very) if 2b) have only MAC-hs to reset, and do not have additional information bits to be added into RRC and switch message, (being about to 1e sends with signal), then WTRU is based on making decision from the system information in source and from the Target cell of RRC message.Especially, WTRU implicitly reads/obtains the information of the characteristic of supporting about the source and destination sub-district.

I) if WTRU detects the change of generation from R6 to R7 or from R7 to R6, then WTRU infers that must carry out MAC-hs reshuffles.Whether in addition, WTRU can also infer needs RLC to reset or reconstruction.WTRU can infer from R6 to R7 or the generation of opposite change via the information that provides among the IE " RB map information " that switches at RRC in the message, promptly whether disposed MAC-ehs or MAC-hs, and new RLC entity is supported variable still fixing RLCPDU.WTRU compares new configuration and existing configuration, and infers whether change has taken place.

Change from R6 to R7 ii) ought take place, and RLC resets not necessarily.Can be by more high-rise this information that disposes.More high-rise can the indication do not need RLC to reset between particular version or whole/part RLC replacement.

Be added into RRC message if 2c) have only MAC-hs to reshuffle designator, (being about to above-mentioned 1a sends with signal), then WTRU can infer also needs RLC to reset.

2d) replacedly, if having only RLC replacement designator to be added into RRC message, (promptly send out above-mentioned 1b sent with signal), then WTRU infers needs MAC-hs to reshuffle.

If 2e) MAC-hs replacement designator is set to very, and different versions is supported in the indication of the additional field in RRC message source and target sub-district, (being about to above-mentioned 1d sends with signal), then whether whether the WTRU decision need MAC-hs to reshuffle and/or need RLC partly or entirely to reset.

Carry out the method that MAC-hs reshuffles

MAC-hs reshuffles the MAC-hs changing function of execution from old MAC-hs to new MAC-hs.Especially, if WTRU in R6 and R7 moving between cells, then the header format of MAC-hs and function are changed.Therefore, need a kind of method of carrying out this change.

At first, carry out the MAC-hs reset process.In case buffer is cleared, variable is reset and successful MAC-hs SDU is passed to more high-risely, the MAC layer is just reshuffled its function.

If the change from R6 to R7 has taken place, then can produce following sequence of events:

1) carrying out MAC-hs resets.

2) follow the HARQ reset process, the MAC layer is configured to supports the MAC-ehs header format.

3) before reorder queue, add the demultiplexing function of Priority Queues.Alternatively, owing in the R6 sub-district, only have a reorder queue among each MAC-hs PDU, when MAC-hs was set up, can there be (supposing that WTRU supports R7) in described demultiplexing function always.

4) reorganization (and demultiplexing of logic channel) function is added into the existing decomposition function piece in each reorder queue.Alternatively, owing in the R6 sub-district, do not have clauses and subclauses can have segment identifiers in the reorder queue, when MAC-hs was set up, can there be (supposing that WTRU supports R7) in recombination function always.

If the change from R7 to R6 has taken place, then can produce following sequence of events:

1) carries out as being the defined MAC-ehs replacement in UTRA R7 sub-district.

2) follow the HARQ reset process, MAC-hs is configured to and supports the R6 header format.

3) the demultiplexing function of Priority Queues is removed.Alternatively, owing in the R6 sub-district, only have a reorder queue among each MAC-hs PDU, then in MAC-hs, keep the demultiplexing function.

4) recombination function is removed.Alternatively, because in the R6 sub-district, do not have clauses and subclauses can have segment identifiers in the reorder queue, then be binned in and keep inactive state among the MAC-hs.

The MAC-hs reconfiguration course

For all radio bearers, independent MAC-ehs or the MAC-hs example of each WTRU should be configured.Therefore, MAC-hs is configured to supporting version 7 or the more enhancement mode configuration in the sub-district of highest version, and support version 6 or more the common configuration in the sub-district of lowest version support.

If by more high-rise order, WTRU can be a common configuration from the enhancement mode configuration change with its MAC-hs configuration, and is perhaps opposite.For example, this can occur in during the handoff scenario.Describe below and relate to the process that the MAC-hs between MAC-hs and the MAC-ehs reshuffles.

Described reconfiguration course depends on the information that offers WTRU via RRC message, described RRC message comprise about the IE of MAC-hs or MAC-ehs or be included among " RB map information " IE it be equal to IE, and this IE exists when RB is set up or reshuffled.

Reconfiguration course can occur in: in the description of the common action after receiving " RB map information " IE; Relate in the new definition that receives " DL MAC-hs configuration " IE or its action that is equal to IE; Perhaps relate in another existing action of another configuration of MAC.

Can be by following every the definition corresponding to the process of the reception of this IE:

If a) " DL MAC-hs configuration " is set to " enhancing " value, and stored before value is set to " common " (if i.e. this configuration is changed into enhancing from common);

1) replacement MAC-hs entity; And

2) " DL MAC-hs configuration " disposes MAC-hs or MAC-ehs according to IE.

B) otherwise, if " DL MAC-hs configuration " is set to " common " value, and stored before value is set to " enhancing " (if i.e. this configuration be change into from enhancing common);

1) replacement MAC-ehs entity; And

2) " DL MAC-hs configuration " disposes MAC-hs or MAC-ehs according to IE.

In an optional execution mode, reshuffle if when switching, carry out MAC-hs, then existing MAC-hs resets to indicate and can be used for changing configuration simultaneously.Yet this process must guarantee to read and carry out MAC-hs replacement designator before reshuffling MAC-hs.In this embodiment, can carry out optional inspection.Reshuffle if MAC-hs has taken place, and MAC-hs replacement designator is not set, then the behavior of WTRU can be not specified, and perhaps MAC carries out replacement independently.

Alternatively, can in MAC (3GPP 25.321) standard, illustrate from common to strengthening or opposite MAC reshuffles.Step can be appointed as the part of existing MAC-hs or MAC-ehs process.Especially, when because from common when resetting by upper strata request MAC-hs or MAC-ehs to strengthening MAC-hs or opposite reshuffling, in MAC-hs and/or MAC-ehs reset process will/can illustrate following situation.If taken place to reshuffle, (perhaps alternatively, it can be applied to all situations) must use the old configuration that existed before the indication of resetting to handle all reordering PDU that are cleared or MAC-hs PDU.

Replacedly, reconfiguration course can describe in the new chapters and sections of MAC standard (3GPP25.321), perhaps as the part of MAC-hs/MAC-ehs parameter renegotiation layoutprocedure.This method especially with by the MAC-hs of more high-rise order to MAC-ehs or opposite reshuffle relevant.Especially, following situation can describe and specify:

Can be by the upper strata with the MAC-hs/ehs entity from common to strengthening or opposite reshuffling (modification).

When by the upper strata MAC-hs/ehs entity being reshuffled, WTRU is with replacement MAC-hs/ehs entity (must use old configuration before reshuffling to handle all groupings in the reorder queue).

In order to substitute this process, can replace described replacement by from reorder queue, removing all reordering PDU or MAC-hs PDU and they being passed to the output entity, wherein said output entity be on the entity that reorders entity (for example, for MAC-hs, it can be to decompose entity, and for MAC-ehs, it can be LCH-ID demultiplexing entity or reorganization entity).Note because the clear and definite MAC-hs replacement designator in the switching command can also be carried out reset process after reshuffling.Then, by more high-rise indicated activationary time, bring into use new MAC-hs or MAC-ehs configuration.

Between transfer period, carry out the method that RLC resets

A) switch to R7 from the R6 sub-district and need not whole RLC replacements

When the R6 sub-district switches to R7, because can being configured to, new RLC supports variable PDU size, can not carry out reset all.This is called as part and resets.If the RLC header without any great change, preferably is considered as existing fixed RLC PDU the variable PDU among the new RLC.Therefore, preferably, the RLC entity keeps existing sequence number and corresponding RLC PDU.Yet preferably, some variablees is by heavy initialization or be changed to support new RLC entity.Preferably, these variablees make up, relate to variable, the standard that is used for status report and other state variables that can be used for R7 of the maintenance of reception and launch window including, but not limited to a timer or timer.

Reset if desired, can carry out the following method that is similar to.

B) when needs RLC resets, switch to R6 from the R7 sub-district.

Serving cell can need RLC to reset from the R7 cell change to the R6 sub-district, relevant with variable RLC PDU size because R6 RLC is not configured to.Therefore, the RLC PDU in the RLC entity is preferably deleted at transmitter side, and processed at receiver side before using replacement.In order to optimize the loss of reset process and minimise data, preferably carry out one of following two options.In addition, in other the system that comprises the RLC function in Node-B, such as in LTE or planar structure R8 WCDMA, when having taken place to switch between Node-B, the RLC entity among the WTRU need be reset or rebuild, and data degradation need be minimized.The option that describes below also is applicable to such system.

Option one

Transmitter side resets to the state variable of sender's appointment.The transmitter side setting can be used for the configurable parameter of the transmitter side of new RLC entity.Transmitter side replacement Hyper Frame Number (HFN).Transmitter side abandon the receiver that successfully is sent to each AM RLC entity SDU (promptly corresponding to by affirmative acknowledgement and all RLCPDU that alternately notified the SDU that more high-rise these SDU have successfully been sent).

Replacedly, transmitter side can abandon all SDU that successfully sent, up to first unsuccessful SDU.All SDU with RLC PDU of one or more dont answers are stored in the transmission buffer, and this transmission buffer can be arranged in RLC entity or more high-rise, such as being arranged in PDCP (PDCP).Transmitter side abandons all RLC PDU and all the control PDU in the transmitter side.In case finished reset process, the RLC SDU that is not dropped can be via target Node-B, with the configuration of the new RLC among this target Node-B and be sent out.

This method has minimized data degradation and unsuccessful SDU is retransmitted.Because transmitter side does not receive end-state PDU from receiver side, transmitter side does not have the state information of upgrading at any time.This can cause the transmission that repeats of RLCSDU.Therefore, can add the duplicate detection function at receiver side.

Alternatively, can carry out a kind of method before replacement RLC, to obtain end-state information from receiver side.After resetting and/or reshuffling MAC-hs, receiver side triggers the status report for all AM RLC that are mapped to HS-DSCH.This status report is based on RLC PDU's.Yet before replacement RLC, transmitter side must be waited for the RLC PDU state that receives.This can postpone handoff procedure.

Replacedly, receiver side can send RLC SDU state to transmitter side.Transmitter side then can abandon all other RLC SDU that have been successfully received.This can minimize and repeat to send.Yet, need a kind of method (counting of RLC SDU) of discerning RLC SDU.Alternatively, can replace rlc layer to carry out this function by PDCP (PDCP) layer.If PDCP has handled data recovery procedure, being equal to of RLC SDU is exactly PDCP SDU.As mentioned above, transmitter side retransmits the SDU that is not successfully received with user mode report, and abandons by the indicated SDU that is successfully received of status report, and status report both can be at the rlc layer face, also can be in the PDCP aspect.

At receiver side, be reset and after all groupings that are successfully received of comprising all groupings in the reorder queue all are passed to RLC, can have carried out following step at MAC.Receiver side is handled all RLC PDU.Alternatively, if use the RLC status report to come the minimise data loss, then receiver side generates the RLC status report for each RLC AM example.Receiver side can successfully be combined into the RLC PDU of RLC SDU to more high-rise transmission.Receiver side abandons the RLC PDU that can not be combined into RLCSDU.The SDU of loss alternatively,, then preserves the RLC SDU that does not arrange according to the order of sequence, because can be retransmitted from target Node-B at receiver side if support to transmit according to the order of sequence.Alternatively, can carry out this function at the PDCP layer.Especially, if carry out this function, then can replace above-described process by PDCP SDU at PDCP.More particularly, PDCP can store the PDCP SDU that does not arrange according to the order of sequence, up to the SDU that retransmits loss from target Node-B.Then, rlc layer can be changed to new RLC configuration by reprovision, and the configurable parameter that while Reset Status variable also will can be used for receiver side uses as default.Can add the duplicate detection function.The RLC SDU that repeats can be deleted, and be not sent to more high-rise.This step can be carried out by more high-rise alternatively.

Option 2

According to option 2, can avoid RLC to reset.Especially, if from the RLC PDU size of the R7 sub-district fixedly RLC PDU size greater than the R6 sub-district, and WTRU moves to the R7 sub-district from the R6 sub-district, preferably the RLC PDU that sends and allow to have littler size in the R7 sub-district.If from the RLC PDU size of the R7 sub-district fixedly RLC PDU size greater than the R6 sub-district, and WTRU moves to the R6 sub-district from the R7 sub-district, preferably, is segmented into the RLC PDU of fixed size again from all RLC PDU of R7 sub-district.This needs the heavy fragmentation feature of RLC.Preferably, can be used for the reception of new RLC entity and the every other variable and the parameter of transmitter side and be configured to support R6 RLC.

Though feature and element are described with specific combination, each feature or element can be under the situation that does not have other features and element use separately, or with or with under the various situations that other features and element combine do not use.Method that is provided or flow chart can be at the computer programs of being carried out by all-purpose computer or processor, implement in software or the firmware, wherein said computer program, software or firmware are to be included in the computer-readable recording medium in tangible mode, comprise read-only memory (ROM) about the example of computer-readable recording medium, random-access memory (ram), register, buffer, semiconductor memory apparatus, the magnetizing mediums of internal hard drive and moveable magnetic disc and so on, magnet-optical medium, and the light medium of CD-ROM video disc and digital versatile disc (DVD) and so on.

For instance, appropriate processor comprises: the integrated circuit (IC) and/or the state machine of general processor, application specific processor, conventional processors, digital signal processor (DSP), a plurality of microprocessor, the one or more microprocessors that are associated with the DSP core, controller, microcontroller, application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) circuit, any other types.

The processor that is associated with software can be used to realize radio-frequency (RF) transceiver, to be used in wireless transmission receiving element (WTRU), subscriber equipment (UE), terminal, base station, radio network controller (RNC) or any host computer.WTRU can be used in combination with the module that adopts hardware and/or form of software to implement, for example camera, camara module, visual telephone, speaker-phone, vibratory equipment, loud speaker, microphone, TV transceiver, Earphone with microphone, keyboard,

Module, frequency modulation (FM) radio unit, LCD (LCD) display unit, Organic Light Emitting Diode (OLED) display unit, digital music player, media player, video game machine module, explorer and/or any wireless lan (wlan) module.

Claims (2)

1. a wireless transmitter/receiver unit is characterized in that, described wireless transmitter/receiver unit comprises:

The radio resource control unit, this radio resource control unit is configured to receive radio resource control and switches message, and this radio resource control is switched the message indication and taken place to reshuffle between fixing and variable radio link control protocol data unit size; And

Be electrically coupled to the radio link control unit of described radio resource control unit, wherein said radio resource control unit determines whether that sending radio link control to described radio link control unit rebuilds message.

2. wireless transmitter/receiver unit according to claim 1 is characterized in that, described wireless transmitter/receiver unit also comprises:

Be electrically coupled to the medium access control unit of described radio resource control unit and described radio link control unit, described medium access control unit is configured to receive enhancing high speed media access control replacement message from described radio resource control unit, and wherein said medium access control unit comprises:

At least one logical channel identifier demultiplexing unit is configured to complete medium access control service data unit is passed to correct logic channel or media access control flow;

At least one recomposition unit is configured to carry out that the reorganization of the enhancing high speed media access control service data unit after the segmentation and the enhancing high speed media access control service data unit that will successfully be recombinated are passed to described logical channel identifier demultiplexing unit;

Be used for abandoning the device of stored enhancing high speed media access control service data unit segmentation from described recomposition unit;

At least one reorder queue, this reorder queue is configured to use at least one variable to carry out the reordering of the enhancing high speed media access control protocol Data Unit that receives, and described reorder queue comprises that reorder version timer and at least one of at least one formation strengthen the high speed media access control timer that reorders;

Be used to stop the to reorder device of timer of described reorder version timer and described enhancing high speed media access control;

Being used for described timer and described specification of variables is the device of their initial values separately;

Be used to empty the device of described reorder queue;

The reorder queue allocation units are configured to all protocol Data Units that reorder in the described reorder queue are passed to described recomposition unit;

Resolving cell is configured to the resolution service data cell;

Has the automatic repeat requests of the mixing unit that at least one mixes the soft buffer of automatic repeat requests; And

Be used for emptying the device of the soft buffer of the automatic repeat requests of described mixing for all hybrid automatic repeat request process that is configured.

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