CN1177452C - Method for transmission of protocol data unit information - Google Patents
Method for transmission of protocol data unit informationInfo
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- CN1177452C CN1177452C CNB021107068A CN02110706A CN1177452C CN 1177452 C CN1177452 C CN 1177452C CN B021107068 A CNB021107068 A CN B021107068A CN 02110706 A CN02110706 A CN 02110706A CN 1177452 C CN1177452 C CN 1177452C
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- base station
- protocol data
- network controller
- pond
- data unit
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Abstract
The present invention provides a method for transmitting protocol data unit information. Under the IP transmission mode of the fifth edition R5 of a 3GPP protocol, a high speed downlink packet access system (HSDPA) only supports a service district which is altered by network side selection. The alteration method of the existing service district has a plurality of defects, such as too long transmission delay, protocol data unit omission, etc. The present invention proposes the concept of a base station pool. A direct transmission chain circuit is established between every two base stations in the base station pool. Through the direct transmission chain circuit, the present invention directly forwards unsent protocol data units in a high speed media access control layer from source service districts to destination service districts. The present invention improves the synchronous speed of the protocol data units between new service districts and old service districts and reduces the downlink transmission delay generated in the process of the service district alteration of the high speed downlink packet access system (HSDPA).
Description
Technical field
The present invention relates to wireless communication transmission technique, relate in particular to a kind of method of transmitting protocol Data Unit information.
Background technology
High-speed downstream bag at the 5th version R5 of 3GPP agreement inserts in (HSDPA) technical specification, and the process that the high speed descending sharing channel of bearing the downlink transfer task (HS-DSCH) link is moved on to another sub-district from a sub-district calls Serving cell and changes (Serving cell change).The sub-district at former high speed descending sharing channel (HS-DSCH) link place is called as the source Serving cell, and the sub-district at new high speed descending sharing channel (HS-DSCH) link place is called target serving district.
The change of Serving cell has two control approach, and the one, by network control, the 2nd, control by travelling carriage.Network control is based on the measurement report that travelling carriage is submitted to, and (RNC) selects new Serving cell by radio network controller, and carries out the Serving cell change by the RRC signaling.Signaling procedure is based on existing cell downlink channel (CELL-DCH) switching flow.The Serving cell change of travelling carriage control is selected current service cell by travelling carriage by the RRC signaling.This process and existing fast cell select (FCS) similar, and just fast cell selects (FCS) to finish cell selecting by the signaling of physical layer.
In the 5th version R5 stage of 3GPP agreement, high-speed downstream packet insertion system (HSDPA) is only supported the Serving cell change by network control.The Serving cell change relates to many-sided problem, and the present invention relates generally to and realizes the synchronous of protocol Data Unit between new and old Serving cell (PDU) how as quickly as possible, again existing R5 standard is not produced the problem of conflict simultaneously.
Introduce the synchronous method of protocol Data Unit between existing Serving cell (PDU) below.
Company of Motorola (Motorola) had once mentioned the method for four kinds of retransmission protocol data cells (PDU) between Serving cell in the sub-district replacing method of high speed descending sharing channel (HS-DSCH), this motion is to propose in the 24th meeting of 3GGP TSGRAN WG2, motion number is R2-012391, and name is called: HS-DSCH Cell Change (Motorola).
1) Radio Link control (RLC) querying method
Radio Link in the radio network controller (RNC) control (RLC) entity is inquired about which protocol Data Unit (PDU) to the peer-entities of mobile station side to be moved platform and to have received.The shortcoming of this method is that inquiry signaling transmission delay is oversize, and only is applicable to the AM pattern of Radio Link control (RLC).
2) travelling carriage auxiliary counting method
The Radio Link control (RLC) of mobile station side reports radio network controller (RNC) with last received protocol Data Unit (PDU) sequence number, and radio network controller (RNC) issues data for new Serving cell according to this sequence number.The shortcoming of this method is that the protocol Data Unit that the signaling delay meeting makes travelling carriage to be provided (PDU) sequence number is out-of-date when Serving cell is changed, and the sequence number that estimates under the UM pattern just can avoid protocol Data Unit (PDU) to omit when only reserving big surplus.Can cause the re-transmission of a large amount of protocol Data Units (PDU) like this, not only waste resource but also influence quality of service.
3) auxiliary protocol Data Unit (PDU) method for synchronous of travelling carriage
The source Serving cell transmits details notification target Serving cell at any time by travelling carriage with the protocol Data Unit in the high speed medium access control layer (MAC-HS) (PDU).The advantage of this method is at Serving cell after changing, target serving district can begin to transmit new data immediately, but in protocol Data Unit (PDU) synchronizing process, the protocol Data Unit of two sub-districts (PDU) needs high speed medium access control layer (MAC-HS) to know the sequence number information of Radio Link control (RLC) synchronously, has broken the interlayer relation of Radio Link control (RLC) with media access control layer (MAC).
4) the auxiliary mapping method in base station
After the source Serving cell is received the instruction of cell change, the source Serving cell is according to the protocol Data Unit in the high speed medium access control layer (MAC-HS) formation (PDU) delivery status, generate a mapping (bitmap), i.e. bitmap with protocol Data Unit (PDU) queue length, each gives radio network controller (RNC) by information reporting then with the transmission success or the failure of certain protocol Data Unit (PDU) in 1 or 0 difference Presentation protocol data unit (PDU) formation.Which data radio network controller (RNC) issues for new Serving cell according to this mapping decision.This method is the most received at present, but its problem is: the protocol Data Unit of Fa Songing (PDU) could not arrive target serving district after must being transmitted by radio network controller (RNC); The transmission delay of Iur/Iub interface and radio network controller (RNC) postpone bring tangible hysteresis all can for the downlink transfer of new Serving cell to the mapping information processing.
In the R5 stage of 3GPP standard, transport layer is introduced the IP transmission mode.The internodal transport layer annexation of UTRAN from tree-shaped to netted development.Two kinds of approved UTRAN network routing infrastructures are arranged at present:
1) transmission entity and functional entity unification: promptly base station or radio network controller (RNC) had both had original wireless network layer function, took on transport network layer roles such as router or main frame again.
2) the transmission entity separates with functional entity: promptly base station or radio network controller (RNC) link to each other by special edge router (Edge router), and itself does not have the function of ip router.
Realize that in transport layer the internodal direct communication of wireless network layer just becomes possibility under the condition of mesh interconnect.At present the Iub/Iur interface has begun to identify the data flow on the interface with " IP address+udp port number ".Radio network controller (RNC) funtion part moves down to the base station, and RRM presents the trend of separation, and these all make between radio network controller (RNC) and the base station control relation also subdue, and UTRAN algorithm and process are changed toward distribution gradually by centralized.
On such basis, the agreement and the algorithm of UTRAN wireless network layer still rest under the pattern of original tree structure at present.The introducing principle of IP UTRAN is " only change transport network layer, reduce the influence to wireless network layer as far as possible ", but the new function that this does not hinder wireless network layer to release new agreement and algorithm utilizes transport network layer to provide.
Summary of the invention
The objective of the invention is to overcome the defective that exists in the prior art, a kind of method of transmitting protocol Data Unit information has been proposed, can improve the synchronizing speed of protocol Data Unit between new and old Serving cell (PDU), reduce the downstream propagation delay that high-speed down data packet accessing system produces in Serving cell change process.
The present invention realizes by following method.
A kind of method of transmitting protocol Data Unit information may further comprise the steps:
When the position of travelling carriage changed, as target serving district, this target serving district and source Serving cell belonged in the pond, a base station (NB-pool) radio network controller according to the selected new sub-district of the measurement report of travelling carriage.
This radio network controller changes this source Serving cell of message informing and the affiliated separately base station of target serving district by the RRC signaling with Serving cell.The address that has comprised target serving district in this radio network controller Serving cell that assign the base station under this source Serving cell change message parameter, the address of described target serving district comprise the base station provides under the IP address, target serving district of base station under the target serving district udp port number and target serving district ID; The address that has comprised the source Serving cell in this radio network controller Serving cell that assign the base station under this target serving district change message parameter, the address of described source Serving cell comprise the base station provides under the IP address, source Serving cell of base station under the Serving cell of source udp port number and source Serving cell ID.
This source Serving cell stops to the travelling carriage transmitting downlink data, and the residue protocol Data Unit (PDU) that has not transmitted in the high speed medium access control layer (MAC-HS) with the source Serving cell sends target serving district to by the link that direct transfers between source Serving cell and the target serving district base station under separately.
This target serving district is when receiving residue protocol Data Unit (PDU), also normally receive the New Deal data cell (PDU) that radio network controller issues by Iub interface, and deposit the protocol Data Unit (PDU) that receives in the target serving district buffer memory.
This target serving district begins to send protocol Data Unit (PDU) from data queue's stem to travelling carriage when receiving any one road protocol Data Unit (PDU).
After this source Serving cell will remain the whole forwardings of protocol Data Unit (PDU), send the information of " residue protocol Data Unit (PDU) is transmitted and finished " to radio network controller.
Then, this radio network controller judges whether the pond, base station (NB-pool) of travelling carriage correspondence needs to upgrade, if do not need to upgrade, then described radio network controller is kept original pond, base station (NB-pool); Upgrade if desired, then the link that direct transfers between this pond, wireless network controller updates base station (NB-pool) member and foundation and new pond, the base station member.
Wireless network controller updates base station pond member's method may further comprise the steps:
The base station that radio network controller will be eliminated is remembered respectively in tabulation NB-remove and tabulation NB-add with the IP address of the base station that will add.NB-remove or tabulation NB-add are not empty when tabulating, radio network controller issues the base station that pond, base station (NB-pool) updating message is given administration current service cell in the pond, base station (NB-pool), and pond, base station (NB-pool) updating message comprises tabulation NB-remove and tabulation NB-add.
After pond, base station (NB-pool) updating message is received in the base station of administration current service cell, the link that direct transfers between other base stations foundation in the informing base station pond (NB-pool) or the base station of release and administration current service cell, and after being finished, success or failure are reported to radio network controller.
If radio network controller is received the message of success, then in new pond, base station (NB-pool), search next target serving district, and prepare to send Serving cell change order at any time; If radio network controller is received failure, then keep original pond, base station (NB-pool), and the base station that will successfully not eliminate or add is noted.Radio network controller can also be set the quality of service requirement of the newly-built link that direct transfers in the updating message of pond, base station (NB-pool).
This pond, base station (NB-pool) is made up of the current affiliated base station of travelling carriage and several base stations that are adjacent.Base station in the pond, base station (NB-pool) is specified by radio network controller.Base station in the pond, base station (NB-pool) has the link that direct transfers between any two, can directly transmit by the link that direct transfers to have the data of setting service quality between the base station.The link that direct transfers that pond, a base station (NB-pool) comprises adds up to n (n-1)/2, and each base station provides (n-1) bar required Radio Resource of link that direct transfers simultaneously, and n is the base station number.
Remarkable result of the present invention is: the present invention is applicable to IP and the IP﹠amp of R5 simultaneously; The ATM transmission mode, only need new and old two Serving cells to carry out protocol Data Unit (PDU) synchronously, the sub-district high speed medium access control layer (MAC-HS) need not to consider prior protocol Data Unit (PDU) formation alignment, also needn't break interlayer relation and understand Radio Link control (RLC) sequence number in the protocol Data Unit (PDU), reduced the downlink transfer influence that the Iur/Iub interface delay causes in Serving cell change process.Identical radio network controller (RNC) signaling is adopted in change to the Serving cell between inside of base station and the base station, has simplified signaling process.In addition, the present invention proposes the notion of pond, base station (NB-pool), solved the reliable interconnect problem of base station on limited resources.
Description of drawings
Fig. 1: Serving cell transmission structure schematic diagram before changing
Fig. 2 (a): protocol Data Unit in the radio network controller (PDU) quene state figure
Fig. 2 (b): the protocol Data Unit in the media access control layer buffer memory (PDU) state diagram
Fig. 3: Serving cell transmission structure schematic diagram after changing
Fig. 4: the transmission structure schematic diagram after the pond, base station is upgraded
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples:
1) initial condition:
As Fig. 1 is Serving cell transmission structure schematic diagram before changing.At network side, there are radio network controller 1 and radio network controller 2, wherein radio network controller 1 is the radio network controller under the travelling carriage 4.Radio network controller 1 connects base station 31 and base station 32, and radio network controller 2 connects base station 21.The member in pond, base station (NB-pool) 3 comprises base station 31 and base station 32.Each base station has three sub-districts respectively under its command, and wherein, sub-district 311 belongs to base station 31, and sub-district 321 belongs to base station 32, and sub-district 211 belongs to base station 21.The sub-district 311 that base station 31 has under its command is current service cell.
| First base station | Base station 31 (IP address) |
| Second base station | Base station 32 (IP address) |
| Current Serving BTS | Base station 31 (IP address) |
Comprise 2 base stations and 1 link that direct transfers in the current base station pond (NB-pool) 3.
2) protocol Data Unit (PDU) transmission state before Serving cell is changed:
Protocol Data Unit (PDU) quene state of the Radio Link control (RLC) when sending Serving cell change order in the radio network controller is shown in Fig. 2 (a), wherein sequence number is that 0～999 protocol Data Unit (PDU) has been given and is handed down to base station 31, sequence number is that 1000 later protocol Data Units (PDU) are positioned at send window, but the still following protocol Data Unit (PDU) that is handed down to base station 31.
Protocol Data Unit (PDU) quene state in the high speed medium access control layer (MAC-HS) buffer memory of source Serving cell is shown in Fig. 2 (b) at this moment, wherein preceding 600 protocol Data Units (PDU) have sent to travelling carriage 4, and received that the sign that travelling carriage 4 feeds back receives successful affirmation information, back 400 protocol Data Units (PDU) are not also received successfully and are confirmed.
3) Serving cell change process:
At first, radio network controller 1 is a target serving district according to the measurement result selection sub-district 321 of travelling carriage 4.
After decision-making finished, radio network controller 1 sent " Serving cell change " message by the RRC signaling respectively to base station 31 and base station 32.The sign " the sub-district ID of the udp port of the IP address+base station 32 of base station No. 32+target serving district 321 " that in giving the message parameter of base station 31, has comprised target serving district 321; The sign " the sub-district ID of the udp port of the IP address+base station 31 of base station No. 31+source Serving cell 321 " that in giving the message parameter of base station 32, has comprised source Serving cell 311.
Then, source Serving cell 321 stops the downlink data transmission to travelling carriage 4, sends the 600th ~ No. 999 protocol Data Unit (PDU) data encapsulation in its high speed medium access control layer (MAC-HS) formation to target serving district 321 in Frame by the link that direct transfers between base station 31 and the base station 32.Simultaneously, radio network controller 1 set up with base station 32 between the Iub Radio Link, it is that 1000 ~ 1499 protocol Data Unit (PDU) sends to target serving district 321 that Radio Link is controlled sequence number in (RLC) protocol Data Unit (PDU) formation.
The direct transfer controlling links function of target serving district 321 by base station 32 receives the two-way protocol Data Unit (PDU) from source Serving cell 321 and radio network controller 1, and they are inserted appropriate location in oneself the high speed medium access control layer (MAC-HS) buffer queue.When the buffer queue non-NULL, target serving district 321 promptly begins to send protocol Data Unit (PDU) to travelling carriage from the formation stem.
Transmitted the residue protocol Data Unit (PDU) of source Serving cell 321 when base station 31 after, send Serving cell change acknowledge message to radio network controller 1.The current service cell information that radio network controller 1 upgrades in the pond, base station (NB-pool) 3.
Serving cell after changing, the transmission structure schematic diagram as shown in Figure 3, sub-district 321 becomes the current service cell of travelling carriage.The quantity of base station and the total constant of link that direct transfer among (NB-pool) 3 of pond, base station.
Record sheet content in the radio network controller 1 is:
| First base station | Base station 31 (IP address) |
| Second base station | Base station 32 (IP address) |
| Current Serving BTS | Base station 32 (IP address) |
4) pond, base station (NB-pool) renewal process:
Along with moving of location of mobile station, the information of adjacent cells that radio network controller 1 is sent according to radio network controller 2 finds that sub-district 211 is adjacent with sub-district 321, might become next Serving cell.Therefore, decision adds the base station under the sub-district 211 21 in the current base station pond (NB-pool) 3.
Because base station 32 is current serving BSs, radio network controller 1 sends to base station 32 with pond, base station (NB-pool) updating message.Include newly direct transfer service quality (QoS) requirement of link of the IP address of base station 21 and 1 pair of radio network controller in the message parameter.
After pond, base station (NB-pool) updating message is received in base station 32, the IP address of base station 21 is transmitted to base station 31, and notifies it to set up the link that direct transfers with base station 21.While base station 32 also starts the link establishment process that direct transfers with base station 21.
By carrying out link negotiation with base station 21, the link that direct transfers with base station 21 has successfully been set up in base station 31 and base station 32.Base station 31 is with the message informing base station 32 of link setup success.Base station 32 is upgraded to radio network controller 1 report pond, base station (NB-pool) 3 and is finished.
Be illustrated in figure 4 as the transmission structure schematic diagram after pond, base station (NB-pool) 3 is upgraded, comprise 3 base stations and 3 links that direct transfer among current base station pond (NB-pool) 3.
Radio network controller 1 upgrades its pond, base station (NB-pool) 3 record sheet contents:
| First base station | Base station 31 (IP address) |
| Second base station | Base station 32 (IP address) |
| The 3rd base station | Base station 21 (IP address) |
| Current Serving BTS | Base station 32 (IP address) |
Claims (7)
1, a kind of method of transmitting protocol Data Unit information is characterized in that, said method comprising the steps of:
A: when the position of travelling carriage changed, as target serving district, described target serving district and source Serving cell belonged in the pond, a base station radio network controller according to the selected new sub-district of the measurement report of travelling carriage;
B: described radio network controller sends the RRC signaling Serving cell is changed message informing source Serving cell and the affiliated separately base station of target serving district;
C: described source Serving cell stops to the travelling carriage transmitting downlink data, and the residue protocol Data Unit that has not transmitted in the high speed medium access control layer (MAC-HS) with the source Serving cell sends target serving district to by the link that direct transfers between source Serving cell and the target serving district base station under separately;
D: described target serving district also normally receives the New Deal data cell that radio network controller issues by Iub interface when receiving the residue protocol Data Unit, and deposits the protocol Data Unit that receives in the target serving district buffer memory;
E: described target serving district begins to send protocol Data Unit from data queue's stem to travelling carriage when receiving any one road protocol Data Unit;
F: after described source Serving cell will remain the whole forwardings of protocol Data Unit, send the information of " the residue protocol Data Unit is transmitted and finished " to radio network controller;
G: described radio network controller judges whether the pond, base station of travelling carriage correspondence needs to upgrade, and upgrades if desired, enters step h; If do not need to upgrade, then radio network controller is kept original pond, base station;
H: pond, base station member's record in the record sheet of pond, described wireless network controller updates base station, and the link that direct transfers between foundation and new pond, the base station member.
2, a kind of method of transmitting protocol Data Unit information as claimed in claim 1, it is further characterized in that described wireless network controller updates base station pond member's method may further comprise the steps:
Step 1: the base station that described radio network controller will be eliminated is remembered respectively in tabulation NB-remove and tabulation NB-add with the IP address of the base station that will add;
Step 2: when tabulation NB-remove or tabulation NB-add be empty, described radio network controller issues the base station that pond, base station updating message is given administration current service cell in the pond, base station, and pond, base station updating message comprises tabulation NB-remove and the NB-add that tabulates;
Step 3: after pond, base station updating message is received in the base station of administration current service cell, the link that direct transfers between other base stations foundation in the informing base station pond or the base station of release and administration current service cell, and after being finished, report radio network controller with success or failure;
Step 4: if radio network controller is received the message of success, then in new pond, base station, search next target serving district, and prepare to send Serving cell change order at any time; If radio network controller is received failure, then keep original pond, base station, and the base station that will successfully not eliminate or add is noted.
3, a kind of method of transmitting protocol Data Unit information as claimed in claim 2, it is further characterized in that described radio network controller can be set the quality of service requirement of the newly-built link that direct transfers in the updating message of pond, base station.
4, a kind of method of transmitting protocol Data Unit information as claimed in claim 1, it is further characterized in that, the address that has comprised target serving district in the described radio network controller Serving cell that assign the base station under the Serving cell of the source change message parameter, the address of described target serving district comprise the base station provides under the IP address, target serving district of base station under the target serving district udp port number and target serving district ID; The address that has comprised the source Serving cell in the described radio network controller Serving cell that assign the base station under the target serving district change message parameter, the address of described source Serving cell comprise the base station provides under the IP address, source Serving cell of base station under the Serving cell of source udp port number and source Serving cell ID.
5, a kind of method of transmitting protocol Data Unit information as claimed in claim 1, it is further characterized in that pond, described base station is made up of the current affiliated base station of travelling carriage and several base stations that are adjacent.
6, a kind of method of transmitting protocol Data Unit information as claimed in claim 5, it is further characterized in that the base station in the pond, described base station is specified by radio network controller.
7, a kind of method of transmitting protocol Data Unit information as claimed in claim 6, it is further characterized in that, base station in the pond, described base station has the link that direct transfers between any two, can directly transmit by the link that direct transfers to have the data of setting service quality between the base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021107068A CN1177452C (en) | 2002-01-30 | 2002-01-30 | Method for transmission of protocol data unit information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021107068A CN1177452C (en) | 2002-01-30 | 2002-01-30 | Method for transmission of protocol data unit information |
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| CN1435980A CN1435980A (en) | 2003-08-13 |
| CN1177452C true CN1177452C (en) | 2004-11-24 |
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| CNB021107068A Expired - Fee Related CN1177452C (en) | 2002-01-30 | 2002-01-30 | Method for transmission of protocol data unit information |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100411479C (en) * | 2005-02-24 | 2008-08-13 | 华为技术有限公司 | Method for realizing service based on baseband abused use |
| CN100431364C (en) * | 2005-09-29 | 2008-11-05 | 中兴通讯股份有限公司 | Method for controlling HSDPA flow based on feedback mode |
| CN100442773C (en) * | 2005-11-07 | 2008-12-10 | 华为技术有限公司 | A method to transmit IP message by high speed downlink packet access technology of HSDPA |
| CN1972282B (en) * | 2005-11-24 | 2010-11-03 | 上海原动力通信科技有限公司 | System and method for providing multicarrier HSDPA backward compatibility |
| CN101026514B (en) * | 2006-02-20 | 2011-02-02 | 华为技术有限公司 | Adjacent base station list updating method and system for WiMAX system |
| WO2008017196A1 (en) * | 2006-07-25 | 2008-02-14 | Utstarcom Telecom Co., Ltd. | Method for realizing cell change of serving hs-dsch between node b in hsdpa system, the telecommunication system for realiing the method and program product including program instructions for realizing the method |
| CN103260202B (en) * | 2007-04-30 | 2016-08-17 | 交互数字技术公司 | For processing method and the subscriber equipment of cell reselection |
| CN101330451B (en) * | 2007-06-20 | 2013-01-30 | 华为技术有限公司 | Method for processing forwarding of data packet, node and packet core apparatus |
| CN101350693B (en) * | 2007-07-20 | 2011-04-06 | 华为技术有限公司 | Method and apparatus for conveying protocol information |
| CN101541032B (en) | 2008-03-17 | 2012-06-06 | 中兴通讯股份有限公司 | Method for notifying change of cell information |
| CN101568141B (en) * | 2008-04-25 | 2013-08-07 | 电信科学技术研究院 | Method for controlling information sending and communication equipment |
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