CN101534564B - Random accessing method based on E-DCH transmission channel in TD-SCDMA system - Google Patents
Random accessing method based on E-DCH transmission channel in TD-SCDMA system Download PDFInfo
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Abstract
The invention provides a random accessing method based on E-DCH at a CELL FACH state in a TD-SCDMA system, which comprises the following steps: firstly, UE sends an uplink synchronous code through an Up PCH channel, wherein the uplink synchronous code is a special synchronous code for enhancing uplink accessing at the CELL FACH state, or the Up PCH channel is a special sub Up PCH channel for enhancing uplink accessing at the CELL FACH state, or the combination of the uplink synchronous code and the sub Up PCH channel is specially for enhancing uplink accessing at the CELL FACH state; secondly, after Node B detects the uplink synchronous code of the UE, confirmation is fed back on a fast physical accessing channel (FPACH) and carries with E-DCH resource information if the uplink synchronous code is determined to be the uplink synchronous code special for enhancing uplink accessing at CELL FACH state wherein; thirdly, UE sends data on authorized E-DCH resources.
Description
Technical field
The present invention relates to field of wireless communication, relate in particular in a kind of TD-SCDMA system under the CELL_FACH state, based on the accidental access method of E-DCH transmission channel.
Background technology
The standardization effort that 3GPP (3rd Generation Partnership Project, 3G (Third Generation) Moblie partnership) is carrying out the up enhancing of CELL_FACH (sub-district _ forward access channel) state at present.The up enhancing of CELL_FACH makes it obtain less packet transfer delay and higher transmission rate by introducing the ascending packet data transmission performance that E-DCH (enhancing-dedicated transmission channel) transmission channel strengthens this state at the CELL_FACH state.
The E-DCH transmission is exactly usually said HSUPA (High Speed Uplink Packet Access, high speed uplink packet inserts), and the physical-layer techniques of HSUPA uses advanced obtains high efficiency of transmission.In the version before 3GPP Rel-7, the E-DCH transmission is only used under CELL_DCH (CELL _ DCH) state, signaling on DCCH (Dedicated Control Channel) or DTCH (Dedicated Traffic Channel) logic channel or data map are mapped on E-PUCH (enhancing-physical uplink channel) physical channel to the E-DCH transmission channel again.The E-DCH business is divided into dispatching services and non-scheduling service by the difference of scheduling mode, wherein the resource of non-scheduling service is by SRNC (Serving RNC, service wireless network controller) is UE (User Equipment, user terminal) distributes, resource has periodically and specificity, is suitable for real time business; In dispatching services, be that Node B (base station) distributes sub-district enhanced uplink resource pool by SRNC, be single UE Resources allocation by Node B.
An E-DCH dispatching services transmission course under the CELL_DCH state as shown in Figure 1.
101:SRNC can be for this UE sets up enhanced uplink through admitting control to think, setting up request or wireless links reconfiguration course by the Radio Link of NBAP (Node B applying portion agreement) agreement, to require Node B be that UE sets up the E-PUCH Radio Link;
102: Node B receives configuration parameter, and be that from the up common pool of the enhancing of this sub-district this UE distributes E-AGCH (enhancings-absolute grant channel) channel and E-RNTI (enhancings-Radio Link temporary mark), set up by the Radio Link of NBAP agreement and respond or radio link reconfiguration responds and returns to SRNC;
103:SRNC is by RRC (Radio Resource Control, Radio Resource control) agreement is initiated radio bearer to UE and is set up order, wherein comprise the E-DCH configuration parameter, as E-AGCH channel configuration, E-RNTI, the configuration that is mapped to the logic channel on the E-DCH, E-TFC (enhancing-TFS Transport Format Set) configuration etc.;
104:UE receives configuration parameter, replys response message to network side.Determine that according to configuration parameter current E-DCH transport service is available; UE is mapped to that data volume becomes at non-0 o'clock by 0 in the logic channel buffering area on the E-DCH, and UE initiates E-RUCCH (strengthens-inserting ascending control channel at random) random access procedure and inserts at random and comprise that 105-107 goes on foot:
105:UE selects to be exclusively used in the uplink synchronous code (SYNC_UL) that E-DCH inserts at random, sends by UpPCH (ascending pilot channel) channel;
After 106:Node B detects the uplink synchronous code of UE, send affirmation by FPACH (physical access channel) channel;
107:UE selects an E-RUCCH channel to send dispatch request on the subframe of determining, wherein carries the E-RNTI of oneself;
108: after Node B detects the request of access at random of this UE, UE is added among the competition UE group who uses the E-DCH resource, according to the QOS attribute of current resource situation, UE, UE auxiliary dispatching information etc. this UE is dispatched, after distributing adequate resources, send authorization message by the E-AGCH channel to UE, carry the E-RNTI of UE on the E-AGCH;
After 109:UE detects the E-AGCH that points to oneself, behind timing nE-AGCH, UE sends data on the E-PUCH that authorizes, also have a control channel E-UCCH (enhancing-ascending control channel) who follows on E-PUCH, UE carries E-TFCI (indication of enhancing-transformat), HARQ process number and re-transmission sequence number therein; UE can also send schedule information according to the data volume situation;
110: Node B is decoded to the control channel of following in the E-PUCH channel, obtains transport format information, and data portion is decoded then, and returns ACK/NACK information on enhancing ascending HARQ answering indication signal channel E-HICH channel.Node B can send according to the buffering area situation continued of UE and authorize afterwards.
When carrying out the E-DCH transmission under the CELL_FACH state, because this state is not supported dedicated link, thereby can only carry out dispatching services, dispatching services can be undertaken by the 105-110 flow process among Fig. 1.But as can see from Figure 1, during the UE initial data transfer, always need to wait for the E-AGCH channel authorization then, wherein need the 20ms time at least by E-RUCCH channel request resource.Under the CELL_FACH state, what generally carry out is the Packet Service of interactive class and background classes, and data are interrupted easily, UE can insert by the frequent E-RUCCH of initiation like this, what E-RUCCH took is system's random access resource, bumps easily on this resource, leads to the failure; Even E-RUCCH can once send success, also brought no small time delay to UE.And under the CELL_DCH state, because the traffic carrying capacity of UE is bigger, operational sustainability is relatively good, and the probability of UE initiation E-RUCCH is little; And UE can send dispatch request by non-scheduling resource.At these differences, the present invention proposes an improved E-DCH transfer process, is used for the random access procedure under the CELL_FACH state.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of in the TD-SCDMA system under the CELL_FACH state based on the accidental access method of E-DCH transmission channel, to reduce the consumption of system's random access resource and to reduce service delay.
In order to solve the problems of the technologies described above, the invention provides a kind of in TD SDMA TD-SCDMA system under sub-district _ forward access channel CELL_FACH state based on the accidental access method of enhancing-exclusive use transmission signal channel, comprise the steps:
One, user terminal UE sends uplink synchronous code by ascending pilot channel UpPCH channel; Wherein: described uplink synchronous code is for strengthening the up synchronous code that inserts special use of CELL_FACH state, or the UpPCH subchannel that described UpPCH channel sends the place inserts special-purpose UpPCH subchannel for strengthening the up of CELL_FACH state, or described uplink synchronous code and UpPCH subchannel be combined as the up access special use that strengthens the CELL_FACH state;
Two, after base station node B detects the uplink synchronous code of UE,, then on physical access channel FPACH, return affirmation if be judged as the up access that strengthens the CELL_FACH state, wherein carry the E-DCH resource information;
Three, UE sends data on authorized E-DCH resources.
Further, described UE
Has the E-DCH transmittability; And
Be in idle condition, and use the E-DCH transmission channel to initiate the radio resource control RRC connection request; Perhaps be in the CELL_FACH state, use the E-DCH transmission channel to carry out uplink in the absence that E-DCH authorizes.
Further, described step 1 specifically comprises:
Network side determines to strengthen the employed uplink synchronous code of up access and/or the channel of CELL_FACH state, wherein: described uplink synchronous code is for strengthening the up synchronous code that inserts special use of CELL_FACH state, or the subchannel at described UpPCH channel place inserts special-purpose UpPCH subchannel for strengthening the up of CELL_FACH state, or described uplink synchronous code and UpPCH subchannel be combined as the up access special use that strengthens the CELL_FACH state; And send the configuration information of described uplink synchronous code and/or channel to UE by system message;
UE uses the corresponding synchronous sign indicating number to send uplink synchronous code on corresponding UpPCH subchannel according to described configuration information when initiating to strengthen the up access of CELL_FACH state.
Further, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: network side is divided one group of synchronous code for the up access of enhancing CELL_FACH state is special, this group synchronous code can not be used for Physical Random Access Channel PRACH and insert and strengthen-insert at random ascending control channel E-RUCCH access.
Further, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: all available synchronous codes in the sub-district are used in the up access that strengthens the CELL_FACH state, but the up access of enhancing CELL_FACH state uses special UpPCH subchannel to send synchronous code.
Further, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: the up access that strengthens the CELL_FACH state inserts with Physical Random Access Channel PRACH uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with PRACH uses different UpPCH subchannels to send.
Further, in the step 1, employed uplink synchronous code of up access and/or channel that network side determine to strengthen the CELL_FACH state are meant: the up access that strengthens the CELL_FACH state and enhancing-insert at random ascending control channel E-RUCCH inserts and uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with E-RUCCH uses different UpPCH subchannels to send.
Further, described step 2 specifically comprises:
Network side is allocated the common E-DCH resource pool that is used under the CELL_FACH state in advance, and in system message, broadcast, described common E-DCH resource pool comprises one or more sets E-DCH resources, the E-DCH resource is numbered according to the order of sequence, every cover E-DCH resource comprises enhancing-physical uplink channel E-PUCH channel configuration at least, strengthens ascending HARQ answering indication signal channel E-HICH channel configuration corresponding to a resource sequence number in every cover E-DCH resource;
Node B detects uplink synchronous code on certain UpPCH subchannel, when judgement is when strengthening the up access of CELL_FACH state, if available common E-DCH resource is arranged in the sub-district, then in the sequential of regulation, on corresponding FPACH channel, return confirmation, wherein carry the common E-DCH resource information, comprise the indication of common E-DCH resource, wherein this common E-DCH resource indication is a common E-DCH resource sequence number, corresponds to a cover E-DCH resource of broadcasting in the system message.
Further, described common E-DCH resource information also comprises other authorization resources parameter, as authorization power information or long grant indication.
Further, described step 3 specifically comprises:
UE receives FPACH and judges when this FPACH is the FPACH of the synchronous code that sends at this UE in the sequential of agreement regulation, from system broadcast message, obtain corresponding E-DCH resource according to E-DCH resource indication wherein, and on this E-DCH resource, send data in the back at interval in predetermined timing.
The present invention has following technique effect: the present invention is according to the service feature under the CELL_FACH state, designed a kind of accidental access method based on the E-DCH transmission channel, in the method, UE is not having under the situation of authorization resources, in case data are arranged, just can directly in the uplink random access procedure, send data, avoid the transmission dispatch request and received these two processes of authorization signaling, can save the resource overhead of Random Access Channel, avoid the repeatedly Signalling exchange before UE sends data, save time delay greatly.The channel that the present invention relates to is all based on prior art, and is simply available.
Description of drawings
Fig. 1: the E-DCH dispatching services transmission course figure in the existing system under the CELL_DCH state;
Fig. 2: in the TD-SCDMA system that provides among the present invention under the CELL_FACH state based on the procedure chart of the accidental access method of E-DCH transmission channel;
Fig. 3: according to the transmission course figure of DCCH (Dedicated Control Channel) under the CELL_FACH state of accidental access method of the present invention/DTCH (Dedicated Traffic Channel) channel;
Fig. 4: according to the transmission course figure of CCCH (Common Control Channel) channel under the CELL_FACH state of accidental access method of the present invention.
Embodiment
At the business characteristic of CELL_FACH state, the invention provides a kind of in the TD-SCDMA system under the CELL_FACH state based on the accidental access method of E-DCH transmission channel, comprise the steps (see figure 2):
201, UE sends uplink synchronous code by the UpPCH channel; Wherein: described uplink synchronous code is for strengthening the up synchronous code that inserts special use of CELL_FACH state, or the UpPCH subchannel that described UpPCH channel sends the place inserts special-purpose UpPCH subchannel for strengthening the up of CELL_FACH state, or described uplink synchronous code and UpPCH subchannel be combined as the up access special use that strengthens the CELL_FACH state;
202, after Node B detects the uplink synchronous code of UE,, on the FPACH channel, return affirmation if be judged as the up access that strengthens the CELL_FACH state, wherein carry the E-DCH resource information;
203, UE sends data on authorized E-DCH resources.
Wherein said UE has following feature:
Has the E-DCH transmittability; And
UE is in idle condition, and uses the E-DCH transmission channel to initiate RRC (Radio Resource control) connection request; Perhaps be in the CELL_FACH state, use the E-DCH transmission channel to carry out uplink in the absence that E-DCH authorizes.In the present invention, both of these case all is called the up access that strengthens the CELL_FACH state.
Below each step is described in detail, wherein
There have been 2 kinds of access waies at random in existing TD-SCDMA system: based on PRACH (Physical Random Access Channel) channel insert at random and based on the access at random of E-RUCCH channel, the random access channel resource in E-RUCCH channel and the traditional PRACH channel sharing system.Insert at random in order to distinguish these two kinds, system is divided into 2 groups with the uplink synchronous code in the sub-district, and one group is exclusively used in PRACH and inserts; Another group is exclusively used in E-RUCCH and inserts.
In step 201, according to the method described in the present invention, the TD-SCDMA system need increase a kind of access way at random newly, be called the up access that strengthens the CELL_FACH state herein, insert at random in order to make Node B can distinguish these 3 kinds, network side can determine to strengthen the employed uplink synchronous code of up access and/or the channel of CELL_FACH state, and network side marks off special-purpose synchronous code or subchannel among the present invention, and the present invention advises according to one of following 4 kinds of methods:
1. divide one group of synchronous code for the up access that strengthens the CELL_FACH state is special, this group synchronous code can not be used for the PRACH access and E-RUCCH inserts, that is to say, need to mark off 3 groups of synchronous code characters that do not contain mutually in the sub-district, be respectively applied for the up access that PRACH inserts, E-RUCCH inserts and strengthen the CELL_FACH state;
The UpPCH subchannel can be arbitrarily;
2. all available synchronous codes in the sub-district are used in the up access that strengthens the CELL_FACH state, but the up access that strengthens the CELL_FACH state uses special UpPCH subchannel to send synchronous code, these UpPCH subchannels can not by other 2 kinds at random access style use;
3. the up access that strengthens the CELL_FACH state inserts with PRACH uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with PRACH uses different UpPCH subchannels to send;
The UpPCH subchannel that E-RUCCH insert to use can but be not limited to insert identical with any one employed subchannel of strengthening in the up access of CELL_FACH state with PRACH;
4. the up access that strengthens the CELL_FACH state inserts with E-RUCCH uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with E-RUCCH uses different UpPCH subchannels to send;
The UpPCH subchannel that PRACH insert to use can but be not limited to insert identical with any one employed subchannel of strengthening in the up access of CELL_FACH state with E-RUCCH.
More than 4 kinds of methods be the preferred embodiments of the present invention only, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.As long as can distinguish the up access that PRACH inserts, E-RUCCH inserts and strengthen the CELL_FACH state, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
High level need broadcast to UE by cell system message with the configuration information of corresponding synchronous sign indicating number or subchannel, and is specific as follows:
To method 1, table 1 is a profile instance.
Table 1 is the profile instance of access way at random
| Information element | The circulation number | Note |
| Synchronous code grouping information | Configure dedicated is in the synchronous code information that strengthens the up access of CELL_FACH state |
To method 2,3,4, table 2 is profile instance, and wherein, to method 2, synchronous code is used 8 all uplink synchronous codes in the sub-district; To method 3, synchronous code is used the synchronous code (the existing configuration of existing system) that is exclusively used in PRACH; To method 4, synchronous code is used the synchronous code (the existing configuration of existing system) that is exclusively used in E-RUCCH.
Table 2 is the profile instance of access way at random
| Information element | The circulation number | Note |
| The subchannel grouping information | Configure dedicated is in the subchannel information that strengthens the up access of CELL_FACH state |
In addition, can also dispose the access carve information as required, be applicable to above all 4 kinds of methods, this carve information can insert carve information with reference to the PRACH in the existing system, and is as shown in table 3.
Table 3 inserts the profile instance of carve information
| Information element | The circulation number | Note |
| Insert carve information | 1..maxASC | Priority class according to professional and user is provided with available synchronous code and UpPCH subchannel, and this carve information concrete configuration can insert carve information with reference to the PRACH in the existing protocol.MaxASC: maximum priority class |
| ASC (Access Service Class) | Corresponding a kind of priority class | |
| Available synchronous code | To method 1: Pei Zhi synchronous code should be a subclass that is exclusively used in the synchronous code character that strengthens the up access of CELL_FACH state here.To method 2: Pei Zhi synchronous code should be a subclass of all available synchronous code characters in the sub-district here.To method 3: Pei Zhi synchronous code should be a subclass that is used for the synchronous code character of PRACH here.To method 4: Pei Zhi synchronous code should be a subclass that is used for the synchronous code character of E-RUCCH here. | |
| Available subchannel | To method 2,3,4: Pei Zhi subchannel should be to be exclusively used in one that strengthens in the up access subchannel of CELL_FACH state here. |
Like this, UE will use the synchronous code or the subchannel of this access style correspondence to send uplink synchronous code when initiating to strengthen the up access of CELL_FACH state.
Correspondingly, when Node B detects certain uplink synchronous code on certain UpPCH subchannel, will be according to this type that inserts at random of rule judgment of system's agreement.
In step 202, according to method of the present invention, network side also needs to allocate in advance the common E-DCH resource pool that is used under the CELL_FACH state, and in system message, broadcast, described common E-DCH resource pool comprises one or more sets E-DCH resources, and number according to the order of sequence, comprise a plurality of parameters in every cover E-DCH authorization resources, as E-PUCH channel configuration, E-HICH channel configuration.Also need to broadcast the parameter that other E-DCH transmission needs use, as reference expected received power PRXdes_base, the uplink synchronous parameter, the closed power parameter, E-TFCS (enhancing-transmission format set) configuration, E-UCCH channel repeat number etc.
Table 4 is the relevant configuration informations of common E-DCH, and these configuration informations are broadcasted in cell system message.
The configuration information that table 4 common E-DCH is relevant
Node B detects uplink synchronous code in a subframe (corresponding UpPCH subchannel), Node B judges it is when strengthening the up access of CELL FACH state according to the UpPCH subchannel of this uplink synchronous code or this subframe correspondence, if available common E-DCH resource is arranged in the sub-district, Node B returns confirmation on corresponding FPACH channel in the sequential of agreement regulation.This process is identical with random access procedure in the existing system.On the FPACH channel, except carrying original signaling, also carry the common E-DCH resource information, the present invention's suggestion is a resource indication, this common E-DCH resource indication can be a sequence number, a cover E-DCH resource of broadcasting in the corresponding system message.
Signaling content on the existing FPACH channel sees Table 5:
Signaling content on the existing FPACH channel of table 5
| Information field | Length (bit) |
| Signature sequence number | 3 |
| Relative subframe numbers | 2 |
| The UpPCH starting point | 11 |
| Transmit power level | 7 |
| Keep the position | 9 |
Wherein, the common E-DCH resource indication that the present invention increases can utilize the reservation bit field, and number of bits depends on the common E-DCH resource maximum number of system definition.Supposing the system is definition 32 cover common E-DCH resources at most, need to take the information bit of 5bit so.In addition, former " transmit power levels " field can be used for revising " reference expected received power ".
Certainly, system also can select the partial parameters in the E-DCH resource to send to UE by the FPACH channel, and such as authorization power information in the table 4 or RDI information, this can accomplish dynamic disturbance control and scheduling of resource to UE.E-DCH resource information on the FPACH can comprise a resource indication and one or more authorization resources parameters like this.Certainly, if the mode of certain authorization resources parameter by the FPACH channel sends to UE, so in the system message with regard to the unnecessary broadcast configuration of carrying out.
In step 203, UE receives FPACH and judges when this FPACH is the FPACH of the synchronous code that sends at this UE (this process is identical with random access procedure in the existing system) in the sequential of agreement regulation, UE indicates according to the resource in the E-DCH resource information wherein and obtain corresponding E-DCH resource from system broadcast message, and behind the predetermined timing interval, on this E-DCH resource, send data, this fixed time interval can be arranged by agreement, such as the subframe in interval.Node B also will take into account this time-giver when distributing the common E-DCH resource for UE, guarantee that different UE can not use identical resource at one time.If also transmitted other E-DCH authorization parameter on the FPACH, UE reads also and the parameter in the system message is made as a whole authorization parameter, carries out the selection of transport block length and the control of transmitted power etc.When this common E-DCH resource was mandate by a plurality of TTI of RDI indication, UE can send data continuously on the duration of RDI indication.
The method of the invention can be applied under 2 kinds of scenes:
1. the UE that has the E-DCH ability is in idle condition, uses the E-DCH transmission channel to initiate the RRC connection request;
2. the UE that has the E-DCH ability is in the CELL_FACH state, and do not have authorization resources this moment, but have data to carry out uplink at the E-DCH transmission channel in the buffering area.
Wherein, for scene 1, UE sends is signaling on the CCCH channel, this moment, UE was without any specific configuration information (comprising E-RNTI), all configurations all obtain from system message, in this case, send all signaling datas on the CCCH on the common E-DCH that UE need authorize by FPACH.After data were successfully transmitted, the up access of UE successfully finished, and waited for the downlink signaling that receives the network side feedback; If transfer of data is unsuccessful, the up access failure of UE is initiated once new access again after UE can wait for a period of time.
For scene 2, UE sends is signaling on the DCCH/DTCH, this moment, UE had the E-RNTI of oneself, when UE sends data on the common E-DCH that FPACH authorizes, need be with the E-RNTI and the schedule information that go up oneself, in case data are successfully received by Node B, Node B can send authorization message by the E-AGCH channel to UE according to the buffering area situation in the schedule information, carry the E-RNTI of UE on the E-AGCH, UE does not need to obtain resource by the up access that strengthens the CELL_FACH state.
Fig. 3 is a concrete flow chart that inserts at random based on E-DCH, in this example, employing method 1 (promptly dividing special-purpose synchronous code) is distinguished and is strengthened the up access of CELL_FACH state, and UE sends the data on the DCCH/DTCH, and UE has the E-RNTI configuration of oneself.
301:UE selects to be exclusively used in the uplink synchronous code (information of table 1.1 configuration) that strengthens the up access of CELL_FACH state, if system configuration up access carve information, UE determines concrete synchronous code and subchannel (information of table 1.3 configuration) according to ASC (access service classification);
After 302:Node B detects the uplink synchronous code of UE, judge that this is after once strengthening the up access of CELL_FACH state, if available common E-DCH resource is arranged, Node B will send the sequence number of this common E-DCH resource by the FPACH channel, and this sequence number is this common E-DCH resource sequence number in system message;
303:UE finds corresponding resource distribution according to this E-DCH resource indication from system broadcast message, send the E-DCH packet after the time in predetermined timing on this resource, wherein carries E-RNTI and the schedule information of oneself;
304: Node B is decoded to the control channel of following in the E-PUCH channel, obtains transport format information, and data portion is decoded then, and returns ACK/NACK information on the E-HICH channel.
If NACK, UE will abandon this access so, initiate again to insert at random after waiting for a period of time.
If ACK, this inserts successfully also just to mean UE, continues 305 flow process so:
305: this common E-DCH resource of hypothesis only continues 1 TTI in this example, and Node B can be that UE sends mandate according to the buffering area situation of UE, sends to UE by the E-AGCH channel, has wherein indicated the E-RNTI of UE on the E-AGCH channel;
After 306:UE detected the E-AGCH that points to oneself, behind timing nE-AGCH, UE sent data on the E-PUCH that authorizes.
Fig. 4 is the example of CCCH Channel Transmission, still adopts method 1 (promptly dividing special-purpose synchronous code) to distinguish and strengthens the up access of CELL_FACH state:
401:UE selects to be exclusively used in the uplink synchronous code (information of table 1.1 configuration) that strengthens the up access of CELL_FACH state, if system configuration up access carve information, UE determines concrete synchronous code and subchannel (information of table 1.3 configuration) according to ASC (access service classification);
After 402:Node B detects the uplink synchronous code of UE, judge that this is after once strengthening the up access of CELL_FACH state, if available common E-DCH resource is arranged, Node B will send the sequence number of this common E-DCH resource by the FPACH channel, and this sequence number is this common E-DCH resource sequence number in system message;
403:UE finds corresponding resource distribution according to this E-DCH resource indication from system broadcast message, send the CCCH signaling after the time in predetermined timing on this resource;
404: Node B is decoded to the control channel of following in the E-PUCH channel, obtains transport format information, and data portion is decoded then, and returns ACK/NACK information on the E-HICH channel.
If the resource continuous a plurality of TTI of common E-DCH, UE can subpackage send the CCCH data so, and receives the E-HICH affirmation successively.If all packets all send success, just mean that also UE has finished the transmission of CCCH channel, can wait for network side feeding back downlink RRC signaling.As long as one of them packet sends unsuccessful, this access failure of UE need be initiated up access again so.
Claims (10)
- One kind in TD SDMA TD-SCDMA system under cell forward access channel CELL_FACH state based on the accidental access method of enhancing-exclusive use transmission signal channel, it is characterized in that, comprise the steps:One, user terminal UE sends uplink synchronous code by ascending pilot channel UpPCH channel; Wherein: described uplink synchronous code is for strengthening the up synchronous code that inserts special use of CELL_FACH state, or the UpPCH subchannel that described UpPCH channel sends the place inserts special-purpose UpPCH subchannel for strengthening the up of CELL_FACH state, or described uplink synchronous code and UpPCH subchannel be combined as the up access special use that strengthens the CELL_FACH state;Two, after base station node B detects the uplink synchronous code of UE,, then on physical access channel FPACH, return affirmation if be judged as the up access that strengthens CELL FACH state, wherein carry the E-DCH resource information;Three, UE sends data on authorized E-DCH resources;The up access of above-mentioned enhancing CELL_FACH state refers to UE and has the E-DCH transmittability; And UE is in idle condition, and uses the E-DCH transmission channel to initiate the radio resource control RRC connection request, perhaps is in the CELL_FACH state, uses the E-DCH transmission channel to carry out uplink in the absence that E-DCH authorizes.
- 2. accidental access method as claimed in claim 1 is characterized in that: described UE has the E-DCH transmittability; AndBe in idle condition, and use the E-DCH transmission channel to initiate the radio resource control RRC connection request; Perhaps be in the CELL_FACH state, use the E-DCH transmission channel to carry out uplink in the absence that E-DCH authorizes.
- 3. accidental access method as claimed in claim 1 or 2 is characterized in that, described step 1 specifically comprises:Network side determines to strengthen the employed uplink synchronous code of up access and/or the channel of CELL_FACH state, wherein: described uplink synchronous code is for strengthening the up synchronous code that inserts special use of CELL_FACH state, or the UpPCH subchannel that described UpPCH channel sends the place inserts special-purpose UpPCH subchannel for strengthening the up of CELL_FACH state, or described uplink synchronous code and UpPCH subchannel be combined as the up access special use that strengthens the CELL_FACH state; And send the configuration information of described uplink synchronous code and/or channel to UE by system message;UE uses the corresponding synchronous sign indicating number to send uplink synchronous code on corresponding UpPCH subchannel according to described configuration information when initiating to strengthen the up access of CELL_FACH state.
- 4. accidental access method as claimed in claim 3, it is characterized in that, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: network side is divided one group of synchronous code for the up access of enhancing CELL_FACH state is special, this group synchronous code can not be used for Physical Random Access Channel PRACH and insert and strengthen-insert at random ascending control channel E-RUCCH access.
- 5. accidental access method as claimed in claim 3, it is characterized in that, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: all available synchronous codes in the sub-district are used in the up access that strengthens the CELL_FACH state, but the up access of enhancing CELL_FACH state uses special UpPCH subchannel to send synchronous code.
- 6. accidental access method as claimed in claim 3, it is characterized in that, in the step 1, network side determines that the employed uplink synchronous code of up access and/or the channel that strengthen the CELL_FACH state are meant: the up access that strengthens the CELL_FACH state inserts with Physical Random Access Channel PRACH uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with PRACH uses different UpPCH subchannels to send.
- 7. accidental access method as claimed in claim 3, it is characterized in that, in the step 1, employed uplink synchronous code of up access and/or channel that network side determine to strengthen the CELL_FACH state are meant: the up access that strengthens the CELL_FACH state and enhancing-insert at random ascending control channel E-RUCCH inserts and uses identical synchronous code character, and the up access that strengthens the CELL_FACH state inserts with E-RUCCH uses different UpPCH subchannels to send.
- 8. accidental access method as claimed in claim 1 or 2 is characterized in that, described step 2 specifically comprises:Network side is allocated the common E-DCH resource pool that is used under the CELL_FACH state in advance, and in system message, broadcast, described common E-DCH resource pool comprises one or more sets E-DCH resources, the E-DCH resource is numbered according to the order of sequence, every cover E-DCH resource comprises enhancing-physical uplink channel E-PUCH channel configuration at least, strengthens ascending HARQ answering indication signal channel E-HICH channel configuration corresponding to a resource sequence number in every cover E-DCH resource;Node B detects uplink synchronous code on certain UpPCH subchannel, when judgement is when strengthening the up access of CELL_FACH state, if available common E-DCH resource is arranged in the sub-district, then in the sequential of regulation, on corresponding FPACH channel, return confirmation, wherein carry the common E-DCH resource information, comprise the indication of common E-DCH resource, wherein this common E-DCH resource indication is a common E-DCH resource sequence number, corresponds to a cover E-DCH resource of broadcasting in the system message.
- 9. accidental access method as claimed in claim 8 is characterized in that, described common E-DCH resource information also comprises other authorization resources parameter, described other authorization resources parameters comprise following one or more: authorization power information and long grant indication.
- 10. accidental access method as claimed in claim 1 or 2 is characterized in that, described step 3 specifically comprises:UE receives the affirmation information of returning on the FPACH in the sequential of agreement regulation, and judge when the affirmation information of returning on this FPACH is the affirmation of the synchronous code that sends at this UE, from system broadcast message, obtain corresponding E-DCH resource according to E-DCH resource indication wherein, and on this E-DCH resource, send data in the back at interval in predetermined timing.
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| US8666398B2 (en) * | 2010-04-13 | 2014-03-04 | Qualcomm Incorporated | Random access procedure enhancements for heterogeneous networks |
| CN104053247B (en) * | 2013-03-15 | 2018-11-13 | 苹果公司 | PRACH power estimation based on UpPCH power ramps |
| CN110139242B (en) * | 2018-02-09 | 2021-03-05 | 电信科学技术研究院有限公司 | Data transmission method, device, equipment and computer readable storage medium |
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| CN101064560A (en) * | 2006-04-29 | 2007-10-31 | 中兴通讯股份有限公司 | Method for identifying random access of time-division synchronous CDMA system |
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| CN101132350A (en) * | 2006-08-22 | 2008-02-27 | 中兴通讯股份有限公司 | Control method for reinforcing uplink random access in time division synchronization code division multiple access system |
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| CN101064560A (en) * | 2006-04-29 | 2007-10-31 | 中兴通讯股份有限公司 | Method for identifying random access of time-division synchronous CDMA system |
| CN101064908A (en) * | 2006-04-30 | 2007-10-31 | 中兴通讯股份有限公司 | Method for identifying different service random access in time-division synchronous CDMA system |
| CN101132350A (en) * | 2006-08-22 | 2008-02-27 | 中兴通讯股份有限公司 | Control method for reinforcing uplink random access in time division synchronization code division multiple access system |
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