CN1985526B - Method and apparatus for processing data blocks during soft handover - Google Patents

Abstract

A method and apparatus for processing data blocks during soft handover. The apparatus may be a wireless communication system including at least two enhanced uplink soft handover (EU-SHO) Node-Bs and a radio network controller (RNC). Each Node-B decodes a received data block and forwards the decoded data block to the RNC. If the RNC receives at least one copy of a successfully decoded data block, the RNC uses a re-ordering function entity to process the copy of the successfully decoded data block to support in-sequence delivery to higher protocol layers. If the RNC receives more than one copy of a successfully decoded data block, the RNC discards the extra successfully decoded data block copies. The RNC is either a serving-RNC (S-RNC) or a controllingRNC (C-RNC). Each Node-B includes a medium access control (MAC) entity that handles enhanced uplink dedicated channel (EU-DCH) functionalities.

Description

Processing data blocks during soft handover method and device

Technical field

The relevant wireless communication field of the present invention.More especially, the present invention is about process is as the block in many cell wireless communication system of frequency division duplexing (FDD) or time division duplex (TDD).

Background technology

Improve cochain to contain, the method for output and transmission delay is at present in the tested third generation Partnership Program (3GPP) be shown in distribution 6 (R6) Universal Mobile Telecommunications System (UMTS) research project " FDD uplink reinforcement " train of thought.

In order to reach these targets, extensively expect that Node B (base station) will be born scheduling and distribute the responsibility of upper link resources (actual channel) to user.Keep rough control even if this principle be radio network controller, Node B can also short term basis comparatively radio network controller make and more effectively determine and manage UL radio resources.Be used in distribution 5 (R5) high speed downlink packet access (HSDPA) of similar approach in Universal Mobile Telecommunications System frequency division duplexing (FDD) and time division duplex (TDD) pattern.

Also imagine between wireless transmission/receive unit (WTRU) in shared time section that some independent UL are processed over and UTRAN (UTRAN).This one of example be medium plan (MAC) layer mixing automatic repeat request (HARQ) or only medium access control layer automatic repeat request (ARQ) operation, wherein each transmission may need different transmission number successfully to be received by UTRAN.In order to limit the impact on system architecture, be that the introduction that the protocol layer on expection medium plan should not be reinforced uplink dedicated channel (EU-DCH) affected.By this demand introduced for be passed to wireless spread-spectrum technology (RLC) protocol layer queue in data.Therefore, the HSDPA operation in similar lower chain, be need UTRAN again the queue that produces according to wireless transmission/receive unit radio link control entity of ranking function to organize received data block.

Soft handing-over macro-diversity operation system needs the upper link transmission in centralized control active set in each cell.Active set may comprise a plurality of Node B.Transmit again and produced until at least one Node B realizes only successfully being transmitted as.Successful transmissions is not ensured by all Node B.Therefore, because Successful transmissions may not be obtained in any Node B complete group, so the Successful transmissions that sorts again cannot complete.

Summary of the invention

The relevant processing data blocks during soft handover method of the present invention and device.This device can be wireless communication system, radio network controller (RNC) or integrated circuit (IC).Wireless communication system comprises at least two enhanced uplink soft handover Node B and a radio network controller.Each Node-B decodes is received block and passes on has decoded result, and namely this decoded block of Cyclic Redundancy Check (CRC) is to this radio network controller.If radio network controller receives at least one duplicate of successful decoded data blocks, then radio network controller can use ordering function entity successfully to process decoded block again and be passed to higher protocol level to provide in queue.If radio network controller receives the successful decoded data blocks of more than one duplicate, then radio network controller abandons extra successful decoded data blocks duplicate.Radio network controller is service wireless network controller (S-RNC) or controls radio network controller (C-RNC).Each Node B comprises the MAC entity that can process enhanced uplink dedicated channel function.

Accompanying drawing explanation

Fig. 1 is the wireless communication system calcspar according to the block in present pre-ferred embodiments process service wireless network controller.

Fig. 2 is the process chart of the method step comprising block in process Fig. 1 system.

Fig. 3 is the wireless communication system calcspar according to the block in alternate embodiment processing controls radio network controller of the present invention.

Fig. 4 is the process chart of the method step comprising block in process Fig. 3 system.

Embodiment

The present invention illustrates with reference to accompanying drawing, wherein represents same components throughout identical label system in full.

After this, " wireless transmission/receive unit " one word be comprise but be not limited to subscriber equipment (UE), travelling carriage, fixing or moving user unit, calling set maybe can operate on other types of devices any in wireless environment.After this be called as " base station " one word be comprise but be not limited to Node B, address control unit, other type in access point or wireless environment connects Jie's device.

As be applied to Universal Mobile Telecommunications System, CDMA2000 (code division multiple access 2000) and code division multiple access person, the present invention can be applied to time division duplex further, frequency division duplexing and Time Division Synchronous CDMA multiple access (TD-SCDMA), but also can imagine and be applied to other wireless system.For CDMA2000, the present invention may be implemented on EV-DO (namely only having data) and EV-DV (namely data and voice).

During soft handover operation, higher level is maintained at the active subset of enhanced uplink cell, is be maintained in soft handing-over macro-diversity state to this enhanced uplink dedicated channel.Cell in these active subset is controlled by different enhanced uplink soft handover Node B.

Fig. 1 display comprises the service wireless network controller 105 and at least two (2) enhanced uplink soft handover Node B 110 (110A that operate according to present pre-ferred embodiments ... wireless communication system 100 110N).No matter with or without soft handing-over, each wireless transmission/receive unit all has one or more ordering function entity again 115 and is implemented in service wireless network controller 105.Mixing automatic repeat request or the automatic repeat request process of process enhanced uplink dedicated channel function are placed in the MAC entity 120 in each enhanced uplink soft handover Node B 110.Each ordering function entity 115 again can communicate with the higher protocol level 125 in service wireless network controller 105 and comprise an associated buffer (unlabelled).

Fig. 2 is that soft handover comprises block in treatment system 100, namely process 200 flow chart of the method step of packet data unit (PDUs).In step 205, block, (namely enhanced uplink data block) is received in each enhanced uplink soft handover Node B 110 from wireless transmission/receive unit.In step 210, each enhanced uplink soft handover Node B 110 is decoded and is received block, and this decoded block is transferred to service wireless network controller 105.Should notice that each enhanced uplink soft handover Node B 110 is by received for trial decoding enhanced uplink transmission.When having Cyclic Redundancy Check, unless wireless transmission/receive unit entity and logic channel/medium plan-d known by other method, otherwise received block can not be transferred to service wireless network controller 105 by each enhanced uplink soft handover Node B 110.All blocks that is successfully decoded with good Cyclic Redundancy Check results are all transferred to service wireless network controller 105.

Still with reference to figure 2, determine whether at least one duplicate of successful decoded data blocks receives (step 215) from the serviced radio network controller 105 of enhanced uplink soft handover Node B 110.If determine in step 215, service wireless network controller 105 not yet receives the duplicate of any successful decoded data blocks, be then regarded as not yet being correctly received (step 220) by transfer of data block system.In step 215, if determine, at least one duplicate of successful decoded data blocks receives from the serviced radio network controller 105 of enhanced uplink soft handover Node B 110, then then determine that whether the multiple duplicate of successful decoded data blocks is from different enhanced uplink soft handover Node B 110 received (step 225).

If step 225 determines that the multiple duplicate of successful decoded data blocks is received from different enhanced uplink soft handover Node B 110, then only a duplicate is stored in the order buffer again (without icon) that ordering function entity again 115 in serviced radio network controller 105 maintains to be used as and is correctly received block, and the duplicate system that is additionally received of any successful decoded data blocks is discarded as redundant data (step 230).

Finally, in step 235, successful decoded data blocks is that the ordering function entity again 115 in serviced radio network controller 105 processes.Ordering function entity again 115 in service wireless network controller 105 can perform collator again and be correctly received successful decoded data blocks in ordering function entity 115 again to support to be passed to higher protocol level 125 in queue in these.

Process 200 is helpful, because can be combined and be organized in queue from the block that different enhanced uplink soft handover Node B 110 is received to be passed to the higher protocol level 125 of service wireless network controller 105.The ordering function entity again 115 be placed in service wireless network controller 105 can make enhanced uplink medium plan packet data unit be processed successfully to receive independent of being provided the Node B receiving each packet data unit and being correctly passed to higher protocol level 235, causes MAC data to be lowered and wireless spread-spectrum technology recovers.

Fig. 3 display comprises control radio network controller 305 and at least two (2) the enhanced uplink soft handover Node B 110 (110A according to alternate embodiment operation of the present invention ... wireless communication system 300 110N).One or more again ordering function entity 315 be implemented in control radio network controller 305 to support soft handing-over.Mixing automatic repeat request or the automatic repeat request process system of process enhanced uplink dedicated channel function are placed in the MAC entity 320 in each enhanced uplink soft handover Node B 310.Each ordering function entity 315 again can communicate with being external to the higher protocol level 325 controlling radio network controller 305 and comprise an associated buffer (unlabelled).

Fig. 4 is that soft handover comprises block in treatment system 300, namely process 400 flow chart of the method step of packet data unit.In step 405, block, (namely enhanced uplink data block) is be received in each enhanced uplink soft handover Node B 310 from wireless transmission/receive unit.In step 410, each enhanced uplink soft handover Node B 310 is decoded and is received block, and this decoded block system is transferred to control radio network controller 305.Should notice that each enhanced uplink soft handover Node B 310 is by received for trial decoding enhanced uplink transmission.When having Cyclic Redundancy Check, unless wireless transmission/receive unit entity and logic channel/medium plan-d known by other method, otherwise each enhanced uplink soft handover Node B 310 received block can not be transferred to control radio network controller 305.All blocks that is successfully decoded with good Cyclic Redundancy Check results are all transferred to control radio network controller 305.

Still with reference to figure 4, determine whether at least one duplicate of successful decoded data blocks is received (step 415) from enhanced uplink soft handover Node B 310 by control radio network controller 305.Control radio network controller 305 if determine in step 415 and not yet receive the duplicate of any successful decoded data blocks, be then reinforced the block system that uplink soft handover Node B 310 passes on and be regarded as not yet being correctly received (step 420).In step 415, if determine, at least one duplicate of successful decoded data blocks is received from enhanced uplink soft handover Node B 310 by control radio network controller 305, then then determine that whether the multiple duplicate of successful decoded data blocks is from different enhanced uplink soft handover Node B 310 received (step 425).

If step 425 determines that the multiple duplicate of successful decoded data blocks is received from different enhanced uplink soft handover Node B 310, then only a duplicate is stored in the order buffer again (unlabelled) maintained by the ordering function entity again 315 controlled in radio network controller 305 to be used as and is correctly received block, and the extra received duplicate system of any successful decoded data blocks is discarded as redundant data (step 430).

Finally, in step 435, successful decoded data blocks is processed by the ordering function entity again 315 controlled in radio network controller 305.It can perform collator again and be correctly received successful decoded data blocks in ordering function entity 315 again to support to be passed to higher protocol level 325 in queue in these.

Process 400 is helpful, because suppose that these Node B 310 have identical control radio network controller 305, so can be combined and be organized in queue from the block that different enhanced uplink soft handover Node B 310 is received to be passed to higher protocol level 325.Although its application comparatively places ranking function in service wireless network controller 105 again, some is strict, and this is often case.But this restriction is considered counteracting by other.Such as, the interests of service wireless network controller operation reduce the delay of mixing automatic repeat request operation.Minimize this performance benefits postponed to be well known in technical field.Soft handover, the shared upper link scheduler of all cells during also expection controls to have in radio network controller 305 for comprising the cell controlled by different nodes B 310 active enhanced uplink subset.

Although the present invention shows especially with reference to preferred embodiment and illustrates, person skilled in the art only should be appreciated that otherwise deviates from the invention described above category, all can do the change of various types and details.

Claims (8)

1. the method for processing data blocks during soft handover used in radio network controller (RNC), wherein radio network controller (RNC) comprises ordering function entity again, and the method comprises:

At least one duplicate of the block of receipt decoding;

Under the condition of duplicate receiving the block that more than is decoded, abandon the duplicate of the block of extra decoding; And

In response at least one duplicate of block receiving described decoding, described in using, the duplicate of ordering function entity to the block of not abandoned decoding sorts again again, is passed to higher protocol level to be supported on one or more enhanced uplink (EU) channel by queue.

2. the method for claim 1, wherein said radio network controller is service wireless network controller (S-RNC), and described higher protocol level is positioned at this service wireless network controller.

3. the method for claim 1, wherein said radio network controller is for controlling radio network controller (C-RNC), and described higher protocol level is positioned at this control radio network controller outside.

4. one kind for the radio network controller (RNC) at processing data blocks during soft handover, this radio network controller is configured at least one duplicate of the block of receipt decoding and abandons the duplicate of block of received extra successful decoding, and this radio network controller comprises:

Ordering function entity at least again and again, the duplicate for the block to not abandoned decoding sorts to be supported on one or more enhanced uplink (EU) channel again and is passed to higher protocol level by queue.

5. radio network controller as claimed in claim 4, wherein said radio network controller is service wireless network controller (S-RNC).

6. radio network controller as claimed in claim 4, wherein said radio network controller is for controlling radio network controller (C-RNC).

7. one kind for the integrated circuit (IC) at processing data blocks during soft handover, this integrated circuit is configured at least one duplicate of the block of receipt decoding and abandons the duplicate of block of received extra successful decoding, and this integrated circuit comprises:

Ordering function entity at least again and again, the duplicate for the block to not abandoned decoding sorts to be supported on one or more enhanced uplink (EU) channel again and is passed to higher protocol level by queue.

8. integrated circuit as claimed in claim 7, wherein said integrated circuit is arranged in service wireless network controller (S-RNC), and this service wireless network controller transfers to the block of this service wireless network controller in soft handover process.

Images