CN101286926B - Method for switching PS service in TD-SCDMA between dedicated channel and common channel - Google Patents
Method for switching PS service in TD-SCDMA between dedicated channel and common channel Download PDFInfo
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- CN101286926B CN101286926B CN2007100958699A CN200710095869A CN101286926B CN 101286926 B CN101286926 B CN 101286926B CN 2007100958699 A CN2007100958699 A CN 2007100958699A CN 200710095869 A CN200710095869 A CN 200710095869A CN 101286926 B CN101286926 B CN 101286926B
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Abstract
The invention relates to a method for switching a PS service between a dedicated channel and a common channel, which is applied in TD-SCDMA of the third generation of mobile communication and comprises the steps that: the transmission format of an RACH is configured into two with one applied to signaling transmission and the other to packet data service transmission; when an RNC determines the switching of the PS service of the users between the dedicated channel and the common channel is needed, the RNC sends radio bearer reconfiguration information to UE and the UE carries out channel switching according to parameters in the information after receiving the information. The method of the invention ensures that the RB of the service does not need to be reestablished during the switching of the PS service between the dedicated channel and the common channel, which simplifies the processing of the UE and the network side and avoids data rate ripple as far as possible.
Description
Technical field
The present invention relates to field of wireless communication, be specifically related to the changing method of PS business between dedicated channel and common signal channel in the 3-G (Generation Three mobile communication system).
Background technology
In the third generation (3G) mobile communication system, business can be by Common transport channel or dedicated transmission channel transmission, and the occupation condition of different channels is different with transmission bandwidth.In order to save the system bandwidth resource, improve resource utilization ratio and operational efficiency, different business need be based upon on the different channels according to actual transfer rate.
For packet domain PS (packet switching) business, particularly interactive class and background business, often the actual speed rate fluctuation ratio is bigger, and often the speed than signatory is little.Arrive certain thresholding when speed is little.Network side can be moved on the common signal channel (FACH) from dedicated channel (DCH) by notifying user equipment UE (user equipment).
Dedicated channel is meant when the user has demand, distribute corresponding resource for the user according to demand, these resources are just proprietary by this user ID, no matter whether this user has transfer of data, other user can not use, so when user's service rate becomes smaller, may have the situation of wasting resource.And common signal channel then is the channel that each user shares.
When traffic data rate is very little, business datum is transmitted on Common transport channel, mainly be to use the FACH transmitting downlink data, the RACH transmit ascending data at present.Like this, can save the air resource of system, but make full use of transfer bandwidth, can increase the user of the PS of system service access.
If system adopts the signaling bear of 3.4K at the UU mouth, and RRC connects and is based upon on the common signal channel, and the transformat of Random Access Channel (RACH) is that (payload is (170-42)=128bit) to 1*170 so.So the upstream rate maximum on the district common channel can only be 12.8K (supposing that TTI is 10ms), and does not reach 16K or higher.
The flow process that present PS business is switched between common signal channel and dedicated channel is:
1. supposition is after the professional foundation of PS is finished, inner medium access (MAC) layer of radio network controller (RNC) has started the measurement to the downlink data flow, sent simultaneously and measured control messages, allowed UE start measurement the upstream data flow to UE.
2.RNC, carry out the algorithm synthesis judgement according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside.
3. the result of algorithmic decision is for to switch to common signal channel with business from dedicated channel.RNC organizes radio bearer reconfiguration message to send to UE, is with an activationary time in the message.UE receives this message, if activationary time has arrived, RNC and UE rebuild professional RB simultaneously.The reason back that needs to rebuild is described in detail.
4.UE send radio bearer reconfiguration complete message to RNC.
In this process the 3rd has a RNC and UE to carry out the process that professional RB rebuilds simultaneously in the step in the above.Reason be according among the PRACH systeminformation list among the 10.3.6.55 of 25.331 agreements to the explanation " For TDD in this release there is asingle TF within the RACH TFS " of RACH TFS, spell out here and only allow a transformat (TF) in the TFS Transport Format Set (TFS) of RACH channel in the TDD system and exist.When a PS business will be carried on the common signal channel, according to 34.108 agreements, the transmission block of PS business (as interactive class) was a unit with 336 (RLC SIZE is 320).If a PS business begins to be carried on the DCH so, RLC SIZE is 320bit, when the speed decline of PS business, when the decision making algorithm of RNC need be moved to common signal channel with it, so corresponding uplink service RB needed to rebuild, because it is a kind of that the TF of RACH can only have, be 1*170 (corresponding RLC SIZE be 128), so professional RLC SIZE the PS business is moved to the process of common signal channel from DCH variation has taken place, so need to rebuild, flow process is seen accompanying drawing 1.
The flow process that the professional RB of present this employing rebuilds has two shortcomings:
1. professional RB rebuilds inevitably meeting lost part data, causes PS speed discontinuous.
2. RNC and UE inter-process complexity have been caused.
Summary of the invention
In view of this, in order to overcome the shortcoming that exists in the present flow process, main purpose of the present invention is to propose the method that a kind of PS business is switched between dedicated channel and common signal channel.
One aspect of the present invention proposes following scheme:
The method that a kind of packet domain PS business is switched between dedicated channel and common signal channel is used for the TD-SCDMA of 3G (Third Generation) Moblie, and uplink business data transmits on Random Access Channel RACH, it is characterized in that may further comprise the steps:
A. need be when dedicated channel to be moved to common signal channel when radio network controller (RNC) judgement with user's PS business, RNC sends radio bearer to user equipment (UE) and reshuffles radio bearerreconfiguration message;
After b.UE received this message, the parameter according in the message switched to common signal channel.
The above-mentioned a plurality of transformat TF of a RACH channel configuration.
The transformat TF of above-mentioned RACH channel is configured to two kinds: first form is used for command transmitting, and second form is used for the transmitting grouped data business.
After UE switches to common signal channel, if send signaling to network then select first form of RACH channel, if send business datum to network then select second form of RACH channel.
RNC adjudicates the PS business that whether needs the user and moves to common signal channel from dedicated channel according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside among the above-mentioned steps a.
Also comprise that step: UE responds radio bearer to RNC and reshuffles and finish after the above-mentioned steps b.
The present invention proposes following scheme on the other hand:
The method that a kind of packet domain PS business is switched between dedicated channel and common signal channel is used for the TD-SCDMA of 3G (Third Generation) Moblie, and uplink business data transmits on Random Access Channel RACH, it is characterized in that may further comprise the steps:
A. need be when common signal channel to be moved to dedicated channel when RNC judgement with user's PS business, RNC sends radio bearer to UE and reshuffles radio bearer reconfiguration message;
After b.UE received this message, the parameter according in the message switched to dedicated channel.
The above-mentioned a plurality of transformat TF of a RACH channel configuration.
The transformat TF of above-mentioned RACH channel is configured to two kinds: first form is used for command transmitting, and second form is used for the transmitting grouped data business.
RNC adjudicates the PS business that whether needs the user and moves to common signal channel from dedicated channel according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside among the above-mentioned steps a.
Also comprise that step: UE responds radio bearer to RNC and reshuffles and finish after the above-mentioned steps b.
Can see that from top description professional RB can not be rebuild in the switching of PS business between dedicated channel and common signal channel, has simplified the processing of UE and network side, has also avoided the fluctuation of data rate simultaneously as far as possible.
This PS business proposed by the invention makes the PS business move to common signal channel or when common signal channel was moved to DCH, professional RLC did not need to rebuild, and has guaranteed the continuity of PS speed from DCH in the method for switching between dedicated channel and common signal channel.Other advantages of the present invention, target, to set forth in the following description to a certain extent with feature, and to a certain extent,, perhaps can obtain instruction from the practice of the present invention based on being conspicuous to those skilled in the art to investigating hereinafter.Target of the present invention and other advantages can be passed through following specification, claims, and the specifically noted structure realizes and obtains in the accompanying drawing.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 for present dedicated channel to the flow process of switching between common signal channel;
Fig. 2 is that dedicated channel according to the present invention is to the flow process of switching between common signal channel.
Embodiment
1) in the TD-SCDMA of 3G (Third Generation) Moblie, with among the 10.3.6.55 of 3GPP25.331 agreement about the description of RACH TFS field: NOTE:For TDD in this releasethere is a single TF within the RACH TFS deletion.That is: allow in TD-SCDMA for a plurality of TF of RACH channel configuration.Simultaneously with the description of RACH TFCS field: NOTE:
For TDD in this release there is no TFCS required deletion.Promptly be illustrated among the TD-SCDMA, this field also can be filled in.Because if allow a RACH to dispose a plurality of TF, so, natural TFCS also has a plurality of.
2) describe in the 5A.3.4.4 of 3GPP25.221 (seeing Table lattice 1): in TD-SCDMA, when modulation system was QPSK, the PRACH time slot format can only be 0,10 and 25.Because originally a RACH only joins a kind of TF, time slot corresponding form TFCI is not for existing, and time slot format is 0,10 and 25 just corresponding to the non-existent situation of TFCI.According to 1) described in, when a RACH can dispose a plurality of TF the time, the time slot format of PRACH also just no longer includes this restriction so, the time slot format that is to say PRACH again is not limited to 0,10 and 25 3 kind.
| Spreading?Factor | Slot?Format# |
| 16 | 0 |
| 8 | 10 |
| 4 | 25 |
5A.3.4.4 among the table 13GPP25.221:
3) transformat (TF) with RACH is configured to two kinds, and a kind of TF is 1*170, for command transmitting is used.Another kind of TF is 1*362, is used for the transmitting grouped data business.
4) behind the data traffic measurement report of RNC according to the data traffic measurement report of the UE that receives and RNC inside, judgement need be with user's PS business when dedicated channel be moved to common signal channel, RNC sends radio bearer reconfiguration message to UE, after UE receives this message, according to the parameter in the message, do not need to rebuild professional RB when switching to common signal channel, respond radio bearer reconfiguration to RNC then and finish.
5) switch to common signal channel after, if UE wants to send signaling to network, then select the transformat of the 1*170 of RACH channel.If send business datum, then adopt the transformat of the 1*362 of RACH channel to network.
6) described above is the process that switches to common signal channel from dedicated channel, if switch to dedicated channel from common signal channel, process is similar, promptly 4) in, behind the data traffic measurement report of the UE that the RNC basis is received and the data traffic measurement report of RNC inside, judgement need be with user's PS business when dedicated channel be moved to common signal channel, RNC sends radio bearerreconfiguration message to UE, after UE receives this message, according to the parameter in the message, do not need to rebuild professional RB when switching to dedicated channel, respond radio bearer reconfiguration to RNC then and finish.
Below in conjunction with accompanying drawing, the method that the explanation PS business of giving one example is switched to dedicated channel at common signal channel.
According to method of the present invention, allow the RACH channel also dispose two kinds of transformat (1*170,1*362), corresponding RLC SIZE is (128,320), when carrying PS is professional, the transformat that adopts is 1*362, so also just the 12.8K than former is big for the speed that can carry,, can only adopt transformat 1*170 because when having only a kind of transformat in the past.
As mentioned above, dispose the RACH channel parameter as follows:
Because RACH has two kinds of transformats now, the TFCI of PRACH physical channel has 2bit so, belongs to short TFCI, obtains the TFCI of 8bit behind the coding.If spreading factor is 4, then the ascending time slot form is selected time slot format for use No. 27:
| SlotFormat# | SpreadingFactor | Midamblelength(chips) | NTFCI(bits) | N SS&N TPC(bits) | Bits/slot | N Data/Slot(bits) | N data/datafield(1)(bits) | N data/datafield(2)(bits) |
| 27 | 4 | 144 | 8 | 0&0 | 352 | 348 | 174 | 174 |
Suppose PS professional set up finish after, the MAC layer of RNC inside has started the measurement to the downlink data flow, has sent to UE simultaneously and has measured control messages, has allowed UE start measurement to the upstream data flow.RNC carries out the algorithm synthesis judgement according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside.
The result of algorithmic decision is for to switch to dedicated channel with business from common signal channel.Dedicated channel (DCH, comprising up-downgoing) the transmission block size that goes up in the transformat of PS all is 336 (corresponding RLC SIZE is 320), by present configuration, common signal channel is on up direction, just the transformat of RACH channel is 1*362 (corresponding RLC SIZE also is 320), so when migration takes place, up RLC SIZE does not change, all be 320, RLC just need not rebuild so, avoided professional when common signal channel is moved to the DCH channel, data abandon re-transmission, flow process is seen accompanying drawing 2.The above only is preferred implementation of the present invention and system framework, does not constitute the qualification to protection range of the present invention.Under the situation that does not deviate from spirit of the present invention and essence thereof, those skilled in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. method that packet domain PS business is switched between dedicated channel and common signal channel, the TD-SCDMA that is used for 3G (Third Generation) Moblie, uplink business data transmits on Random Access Channel RACH, it is characterized in that, the a plurality of transformat TF of described RACH channel configuration, described a plurality of transformat TF comprise first form that is used for command transmitting and second form that is used for the transmitting grouped data business; Said method comprising the steps of:
A. need be when dedicated channel to be moved to common signal channel when radio network controller (RNC) judgement with user's PS business, RNC sends radio bearer to user equipment (UE) and reshuffles radio bearerreconfiguration message;
After b.UE received this message, the parameter according in the message switched to common signal channel.
2. method according to claim 1 is characterized in that: after UE switches to common signal channel, if send signaling to network then select first form of RACH channel, if send business datum to network then select second form of RACH channel.
3. method according to claim 1, it is characterized in that: RNC adjudicates the PS business that whether needs the user and moves to common signal channel from dedicated channel according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside among the described step a.
4. method according to claim 1 is characterized in that: also comprise step after the described step b:
UE reshuffles to RNC response radio bearer and finishes.
5. method that packet domain PS business is switched between dedicated channel and common signal channel, the TD-SCDMA that is used for 3G (Third Generation) Moblie, uplink business data transmits on Random Access Channel RACH, it is characterized in that, the a plurality of transformat TF of described RACH channel configuration, described a plurality of transformat TF comprise first form that is used for command transmitting and second form that is used for the transmitting grouped data business; Said method comprising the steps of:
A. need be when common signal channel to be moved to dedicated channel when RNC judgement with user's PS business, RNC sends radio bearer to UE and reshuffles radio bearer reconfiguration message;
After b.UE received this message, the parameter according in the message switched to dedicated channel.
6. method according to claim 5, it is characterized in that: RNC adjudicates the PS business that whether needs the user and moves to dedicated channel from common signal channel according to the data traffic measurement report of the UE that receives and the data traffic measurement report of RNC inside among the described step a.
7. method according to claim 5 is characterized in that: comprise also that after described step b step: UE responds radio bearer to RNC and reshuffles and finish.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007100958699A CN101286926B (en) | 2007-04-10 | 2007-04-10 | Method for switching PS service in TD-SCDMA between dedicated channel and common channel |
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| CN2007100958699A CN101286926B (en) | 2007-04-10 | 2007-04-10 | Method for switching PS service in TD-SCDMA between dedicated channel and common channel |
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| CN101286926B true CN101286926B (en) | 2011-03-02 |
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| CN101742678B (en) * | 2008-11-26 | 2012-06-27 | 大唐移动通信设备有限公司 | Voice service access method and RNC |
| CN104581784B (en) * | 2014-12-29 | 2018-12-14 | 大唐移动通信设备有限公司 | A kind of resource seizing method and device of PS business |
| CN105517174B (en) * | 2015-11-20 | 2019-04-05 | 上海华为技术有限公司 | A kind of method and device for transmitting data |
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| CN1411666A (en) * | 1999-10-29 | 2003-04-16 | 艾利森电话股份有限公司 | Channel-type switching from dedicated channel to common channel based on common channel load |
| CN1163010C (en) * | 2001-02-15 | 2004-08-18 | 华为技术有限公司 | Dynamical channel configuration method for CDMA celllar mobile communication system |
| US6829482B2 (en) * | 2000-05-16 | 2004-12-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Switching from dedicated to common channels when radio resources are controlled by drift radio network |
| CN1761355A (en) * | 2004-10-11 | 2006-04-19 | 中兴通讯股份有限公司 | Method of type conversion from dedicated channel to common channel in CDMA system |
| CN1761356A (en) * | 2004-10-11 | 2006-04-19 | 中兴通讯股份有限公司 | Method for converting types from public channel to dedicated channel in CDMA system |
| CN1929674A (en) * | 2005-09-06 | 2007-03-14 | 中兴通讯股份有限公司 | Control method for business macro-removing diversity mode service quality |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1411666A (en) * | 1999-10-29 | 2003-04-16 | 艾利森电话股份有限公司 | Channel-type switching from dedicated channel to common channel based on common channel load |
| US6829482B2 (en) * | 2000-05-16 | 2004-12-07 | Telefonaktiebolaget Lm Ericsson (Publ) | Switching from dedicated to common channels when radio resources are controlled by drift radio network |
| CN1163010C (en) * | 2001-02-15 | 2004-08-18 | 华为技术有限公司 | Dynamical channel configuration method for CDMA celllar mobile communication system |
| CN1761355A (en) * | 2004-10-11 | 2006-04-19 | 中兴通讯股份有限公司 | Method of type conversion from dedicated channel to common channel in CDMA system |
| CN1761356A (en) * | 2004-10-11 | 2006-04-19 | 中兴通讯股份有限公司 | Method for converting types from public channel to dedicated channel in CDMA system |
| CN1929674A (en) * | 2005-09-06 | 2007-03-14 | 中兴通讯股份有限公司 | Control method for business macro-removing diversity mode service quality |
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