CN101572949B - Method, communication system and user device for enhancing random access - Google Patents
Method, communication system and user device for enhancing random access Download PDFInfo
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- CN101572949B CN101572949B CN2008100668826A CN200810066882A CN101572949B CN 101572949 B CN101572949 B CN 101572949B CN 2008100668826 A CN2008100668826 A CN 2008100668826A CN 200810066882 A CN200810066882 A CN 200810066882A CN 101572949 B CN101572949 B CN 101572949B
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Abstract
The invention relates to the field of communication, and discloses a method for enhancing random access. In the method, UE receives high-speed downlink shared control channel command HS-SCCH order transmitted by a base station node Node B, and the UE corresponding to UE ID carried by the HS-SCCH launches enhanced uplink access with rising power according to an access leading signature corresponding to an uplink transmission resource number carried by the received HS-SCCH order or an access leading signature corresponding to an access leading signature number. Meanwhile, the invention also discloses a communication system and the UE. With the method, the communication system and the UE, the invention can ensure that initial transmission power of the UE is more accurate during uplink transmission, and is beneficial to accurate transmission of uplink transmission and quick completion of uplink synchronization.
Description
Technical field
The present invention relates to the communications field, method, communication system and subscriber equipment that particularly a kind of enhancing inserts at random.
Background technology
Along with development of wireless communication devices, 3GPP (3rd Generation Partnership ProjectWideband Code Division Multiple Access, third generation partner program) at WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access (WCDMA)) in Release 8 versions, introduced to strengthen and inserted these new features at random.Wherein, strengthen the roughly flow process that inserts at random and comprise random access guiding and resource allocation stage, conflict resolution stage, E-DCH (Enhanced DedicatedChannel strengthens dedicated channel) data transfer phase and release stage.
By these new features, the UE under the CELL_FACH state (User Equipment, subscriber equipment) can pass through HS-DSCH (High Speed Downlink Shared Channel, high speed descending sharing channel) downlink data receiving.
In 3GPP WCDMA Release 7 versions, introduced the characteristic of descending HS-DSCH transmission under the CELL_FACH state, and in 3GPP WCDMA Release 8 versions the CELL_FACH state introduced strengthen insert this characteristic at random after, except improving up transmision peak speed, reduce beyond the uplink time-delay, also provide ACK (Acknowledgement for the HS-DSCH transmission, affirmation), NACK (Non-Acknowledgement, non-affirmation) or the up feedback of CQI (Channel QualityIndicator, channel quality indication) provide may.
Under CELL FACH state, the needs of uplink can trigger UE and initiate to insert at random to obtain uplink transmission resource, simultaneously, Node B also can control UE as required and obtain uplink transmission resource, for example when a large amount of downlink datas need send to certain UE, in order to obtain the up feedback of this UE, Node B can control UE and obtain uplink transmission resource, basic process is: the UE of E-DCH transmittability is arranged under CELL FACH state, by broadcast channel obtain RNC (Radio NetworkController radio network controller) configuration about the relevant information of E-DCH resource.When Node B need control certain UE and carries out uplink, Node B sent HS-SCCH (Shared ControlChannel for HS-DSCH, HS-DSCH shared control channel) order to UE; After UE receives HS-SCCHorder, do not carry out random access procedure, but begin the transmission on HS-DPCCH at the fixed time.After UE finished by the HS-DSCH downlink data receiving, Node B can control UE by E-AGCH and discharge employed ascending resource.
The present inventor finds, obtain in the process of ascending resource at the UE of above-mentioned Node B control, because UE has directly begun to comprise the uplink of DPCCH after receiving HS-SCCH order, the Initial Trans of uplink can only be provided with by the open loop power power control.Like this, will cause the initial uplink through-put power inaccurate, cause initial uplink control channel degradation, the uplink synchronous process can't be finished as early as possible; Relatively poor ascending control channel quality also can influence the correct transmission of uplink feedback information simultaneously.
Summary of the invention
In view of this, method, communication system and UE that the embodiment of the invention provides a kind of enhancing to insert at random can make UE obtain initial uplink through-put power exactly, have guaranteed the correctness of uplink synchronous and uplink.
The method that the embodiment of the invention provides a kind of enhancing to insert at random, this method comprises:
Receive the downlink high-speed shared control channel order HS-SCCHorder that base-station node Node B sends, carry customer equipment identification UE ID and uplink transmission resource numbering among the described HS-SCCH order or carry UE ID and access lead signature numbering;
The UE corresponding with described UE ID numbers pairing access lead signature according to the described uplink transmission resource that receives or described access lead signature is numbered the up access of enhancing that corresponding access lead signature is initiated power ramp.
The embodiment of the invention also provides a kind of communication system, and described communication system comprises Node B and at least one UE,
Described Node B is used to send HS-SCCH order, carries UE ID and uplink transmission resource numbering among the described HS-SCCH order or carries UE ID and access lead signature numbering;
The UE of described UE ID correspondence is used for according to the pairing access lead signature of the access lead that receives signature numbering or numbers the enhancing that corresponding access lead signature initiates power ramp with uplink transmission resource and insert at random.
The embodiment of the invention also provides a kind of user equipment (UE), and described UE comprises:
Receiving element is used to receive the HS-SCCH order that Node B sends, and carries UE ID and uplink transmission resource numbering among the described HS-SCCHorder or carries UE ID and access lead signature numbering;
Leading transmitting element, be used for when described UE ID and described UE at once, the enhancing that access lead signature that the described access lead signature numbering that receives according to described receiving element is corresponding or uplink transmission resource are numbered corresponding access lead signature initiation power ramp inserts at random.
Compare than prior art, the method, communication system and the UE that provide by the embodiment of the invention, receive the HS-SCCH order of Node B transmission at UE after, initiate to strengthen up access procedure by the mode of power ramp, can make UE obtain initial uplink through-put power exactly, guarantee the correctness of uplink synchronous and uplink.
Description of drawings
Fig. 1 is a kind of schematic flow sheet that strengthens an embodiment of accidental access method of the present invention;
Fig. 2 is a kind of schematic flow sheet that strengthens another embodiment of accidental access method of the present invention;
Fig. 3 is the example structure schematic diagram of a kind of communication system of the present invention;
Fig. 4 is the structural representation of the embodiment of a kind of UE of the present invention;
Embodiment
The embodiment of the invention discloses the method that a kind of enhancing inserts at random.When the enhancing of Node B control UE initiation inserted at random, UE inserted by the power ramp process, makes that the Initial Trans of UE when uplink is more accurate, helps the correctness of uplink information and finishing as early as possible of uplink synchronous.Below in conjunction with accompanying drawing the method that a kind of enhancing of the present invention inserts at random is described in detail.
Fig. 1 is a kind of schematic flow sheet that strengthens an embodiment of accidental access method of the present invention.As shown in Figure 1, this method comprises:
101, Node B sends HS-SCCH order.
In this step, in the HS-SCCH order that Node B sends, carry customer equipment identification UEID and E-DCH resource identity (E-DCH resource number) or UE ID and access lead signature numbering.
Wherein, the E-DCH resource number is the uplink transmission resource (being called the E-DCH resource in the embodiment of the invention) of UE configuration corresponding to network side (being generally the RNC of network side), is used for this UE and carries out uplink (such as, the up feedback of ACK, NACK or CQI).
In the embodiment of the invention, be used for the E-DCH resource that the UE uplink is used for UE has disposed one group in advance, and each E-DCH resource in the configuring E-DCH resource group and the access lead that UE uses sign corresponding one by one.Therefore, in the HS-SCCH order that Node B sends, carry the E-DCH resource number or the access lead signature can.Wherein, the corresponding relation between E-DCH resource number and the access lead signature numbering can send to UE by system message.
In the embodiment of the invention, after Node B sends HS-SCCH order, can also start a timer, if before this timer expired, do not detect access lead indicated among HS-SCCH order signature or UE uplink (such as, up feedback by the HS-DPCCH transmission), then Node B can select to send new HS-SCCH order once more, perhaps cancels the reservation of the ascending resource of current indication to this UE.
102, the enhancing that UE initiates power ramp according to the access lead signature or the access lead signature corresponding with the E-DCH resource number of the access lead signature numbering correspondence that receives inserts at random.
Node B sends HS-SCCH order in the sub-district of its administration, after receiving this HS-SCCH order with pairing that UE of the UE ID among this HS-SCCH order, just can insert at random according to the enhancing that the corresponding access lead signature of the access lead signature numbering that receives or the access lead signature corresponding with the E-DCH resource number are initiated power ramp.Method by power ramp sends the method for access lead signature can be identical with the power ramp method that strengthens insert at random the time in the prior art.
Owing to this enhancing inserts at random is to control the UE initiation because Node B need send downlink data.Therefore, UE initiate to strengthen and to insert at random that the scrambler that adopted should to insert the scrambler that is adopted at random different with need strengthen enhancing that up E-DCH transmission initiates because of UE in the present embodiment.For showing difference, the scrambler that the up access of enhancing that UE initiates in the present embodiment is adopted is called specific scramble codes.
By the method for the embodiment of the invention, can make the Initial Trans of UE when follow-up uplink more accurate, help the correct transmission of uplink and finishing as early as possible of uplink synchronous.
Accompanying drawing 2 is another embodiment schematic flow sheet of method that a kind of enhancing of the present invention is inserted at random.As shown in Figure 1, this method comprises:
201-202, the step 101-102 in the method for describing with accompanying drawing 1 is similar, is not giving unnecessary details at this.
103, Node B replys UE by descending indicating channel.
In the embodiment of the invention, can reply this UE by on a descending indicating channel, sending an indication information.For example, can be at E-AICH (Enhanced-Acquisition IndicatorChannel, strengthen and to obtain indicating channel) go up and send an E-AI value and reply this UE, that is: after NodeB is detecting the UE that uses specific scramble codes (this specific scramble codes and UE because of strengthen that up E-DCH transmission initiates to insert the scrambler that uses at random different) on the E-AICH access lead is signed, reply this UE by an E-AI value in the one group of E-AI value that keeps, can carry out uplink in order to show this UE.
As shown in table 1, strengthen the method for expressing of the resource allocation information that E-AICH carries when inserting at random for UE in the prior art.
The method for expressing of the resource allocation information that table 1:E-AICH carries
As shown in table 1, wherein have 32 E-AI values.One group of E-AI of above-mentioned reservation can choose from 32 E-AI values shown in the table 1, and between disposing this each E-AI value of organizing the E-AI that keeps and the access lead that UE uses being signed one-to-one relationship (that is: the corresponding UE of each E-AI value) is arranged.Wherein, the corresponding relation between the E-AI value of the access lead signature numbering of UE use and E-AICH can be issued UE by system message broadcasting.
104, UE uses the E-DCH resource of indicating among the HS-SCCH order to carry out uplink.
In this step, after UE receives replying of Node B, the E-DCH resource of indicating among the HS-SCCH order that just can use Node B to send (E-DCH resource number institute is corresponding) is carried out uplink (for example, the transfer of data for descending HS-DSCH provides ACK, NACK or the up feedback of CQI).
In the embodiment of the invention,, can again it not distributed to other UE, so UE does not need the solution that conflicts in strengthening random access procedure because uplink transmission resource is indicated to UE by HS-SCCH order by Node B.
In the embodiment of the invention, during uplink, if there is upstream data to need transmission, UE can carry out uplink by E-DCH.Finish when downlink data transmits, and do not have upstream data to need transmission, Node B can control UE by E-AGCH and discharge employed ascending resource.
The method that the enhancing that provides by the embodiment of the invention inserts at random, UE realizes strengthening up access by the power ramp process, make that the Initial Trans of uplink is more accurate, help that uplink synchronous ground is finished as early as possible and uplink correctness (for example, carrying out up feedback) for downlink transfer.
The embodiment of the invention also provides a kind of communication system.As shown in Figure 2, comprise Node 201 and at least one UE (for convenience of description, two UE:UE202, UE203 only being shown among the figure) in this system at least, Node 201 and these UE communicate by the Uu interface.Wherein,
Node B 201 is used to send HS-SCCH order, carries UE ID and uplink transmission resource numbering among this HS-SCCH order or carries UE ID and access lead signature numbering.
Suppose the pairing UE of being 202 of the UE ID that carries among this HS-SCCH order; So,
UE 202, are used for according to the corresponding access lead signature of the access lead that receives signature numbering or number the enhancing that corresponding access lead signature initiates power ramp with uplink transmission resource and insert at random.
The communication system that provides by the embodiment of the invention, when the enhancing of Node B control UE initiation inserts at random, UE inserts by the power ramp process, make that the Initial Trans of UE when uplink is more accurate, help the correctness of uplink information and finishing as early as possible of uplink synchronous.
In this communication system, when UE 202 initiates to strengthen when inserting at random by the mode of power ramp, Node B 201 when also being used to detect the access lead signature of UE 202 uses, sending an indication information by descending indicating channel to UE 202 and replys UE 202.
Preferably, this descending indicating channel is E-AICH, and this indication information is the E-AI value.
UE 202, after also being used to receive the replying of Node B 201, the uplink transmission resource of indicating among the HS-SCCH order by Node B 201 transmissions is carried out uplink (for example, carrying out ACK, NACK or the up feedback of CQI for the transfer of data of descending HS-DSCH).
In the communication system that the embodiment of the invention provides, Node B 201 also is used for sending by broadcast channel the corresponding relation of the access lead signature numbering that the UE of pre-configured one group of uplink transmission resource numbering and system uses when strengthening up the access.
The embodiment of the invention also provides a kind of user equipment (UE).As shown in Figure 3, this UE comprises:
Receiving element is used to receive the HS-SCCH order that Node B sends, and carries UE ID and uplink transmission resource numbering among this HS-SCCH order or carries UE ID and access lead signature numbering;
Leading transmitting element, be used for when described UE ID and described UE at once, insert at random according to accepting the enhancing that corresponding access lead signature of access lead signature numbering that the unit receives or uplink transmission resource number corresponding access lead signature initiation power ramp.
Preferably, this UE can also comprise:
The uplink unit, be used to receive Node B by descending indicating channel send reply after, the uplink transmission resource of indicating among the HS-SCCH order by Node B transmission is carried out uplink (for example, carrying out ACK, NACK or the up feedback of CQI for the transfer of data of descending HS-DSCH).Preferably, this descending indicating channel is E-AICH.
By the UE that the embodiment of the invention provided, when the enhancing of Node B control UE initiation inserts at random, UE inserts by the power ramp process, make that the Initial Trans of UE when uplink is more accurate, help the correctness of follow-up uplink information and finishing as early as possible of uplink synchronous.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the method that enhancing inserts at random is characterized in that, described method comprises:
Receive the downlink high-speed shared control channel order HS-SCCH order that base-station node Node B sends, carry customer equipment identification UE ID and uplink transmission resource numbering among the described HS-SCCH order or carry UE ID and access lead signature numbering;
The UE corresponding with described UE ID numbers pairing access lead signature according to the described uplink transmission resource that receives or described access lead signature is numbered the up access of enhancing that corresponding access lead signature is initiated power ramp.
2. the method for claim 1 is characterized in that, described method also comprises:
When described UE receives replying of described Node B, described UE carries out uplink by the corresponding ascending resource of described uplink transmission resource numbering; Wherein, described UE receives replying of described Node B and comprises:
Described UE receives the corresponding indication information of access lead signature that uses with described UE that described NodeB sends on descending indicating channel.
3. method as claimed in claim 2 is characterized in that, described uplink is for confirming ACK, non-affirmation NACK or channel quality indicator (CQI).
4. method as claimed in claim 2 is characterized in that,
Described descending indicating channel obtains indicating channel E-AICH for strengthening; Described indication information is the E-AI value.
5. as any described method of claim 1-4, it is characterized in that described method also comprises:
Corresponding relation between pre-configured described uplink transmission resource numbering is numbered with described access lead signature, and send to described UE by system message.
6. as any described method of claim 1-4, it is characterized in that described method also comprises:
After described Node B sends described HS-SCCH order, start a timer, the described access lead of indicating among the described HS-SCCH order is signed or the uplink of described UE if do not detect before described timer expired, and described Node B sends described HS-SCCH order once more or cancellation is the uplink transmission resource that described UE reserves.
7. a communication system is characterized in that, described communication system comprises Node B and at least one UE,
Described Node B is used to send HS-SCCH order, carries UE ID and uplink transmission resource numbering among the described HS-SCCH order or carries UE ID and access lead signature numbering;
The UE of described UE ID correspondence is used for according to the pairing access lead signature of the access lead that receives signature numbering or numbers the enhancing that corresponding access lead signature initiates power ramp with uplink transmission resource and insert at random.
8. system as claimed in claim 7 is characterized in that,
Described Node B when also being used to detect the access lead signature of UE of described UE ID correspondence, replys by descending indicating channel;
The UE of described UE ID correspondence, also be used to receive the replying of described Node B after, carry out uplink by the uplink transmission resource of indicating among the described HS-SCCH order.
9. the system shown in claim 7 is characterized in that,
Described Node B also is used for pre-configured described uplink source numbering is issued the corresponding UE of described UE ID with the corresponding relation between the described access lead signature numbering by system message.
10. a user equipment (UE) is characterized in that, described UE comprises:
Receiving element is used to receive the HS-SCCH order that Node B sends, and carries UE ID and uplink transmission resource numbering among the described HS-SCCH order or carries UE ID and access lead signature numbering;
Leading transmitting element, be used for when described UE ID and described UE at once, the enhancing that access lead signature that the described access lead signature numbering that receives according to described receiving element is corresponding or uplink transmission resource are numbered corresponding access lead signature initiation power ramp inserts at random.
11. the UE shown in claim 10 is characterized in that, described UE also comprises:
The uplink unit, be used to receive described Node B by descending indicating channel send reply after, carry out uplink by the uplink transmission resource of indicating among the described HS-SCCH order; Wherein, described Node B comprises by described the replying that described descending indicating channel sends: the corresponding indication information of access lead signature that uses with described UE that described Node B sends by described descending indicating channel.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101990310A (en) | 2009-07-30 | 2011-03-23 | 华为技术有限公司 | Random access method and device thereof |
| CN102932924B (en) * | 2011-08-11 | 2015-12-16 | 华为技术有限公司 | The data transmission method of up short time-delay communication and equipment |
| CN103249168B (en) * | 2012-02-02 | 2016-03-09 | 华为技术有限公司 | Accidental access method, subscriber equipment, base station and communication system |
| CN103476131B (en) * | 2012-06-08 | 2017-10-27 | 中兴通讯股份有限公司 | Method for collision avoidance, base station and terminal under CELL_FACH states |
| CN106604406A (en) * | 2016-04-28 | 2017-04-26 | 福建先创通信有限公司 | Uplink channel reserving method in random access process |
| CN106912098B (en) * | 2017-01-13 | 2019-08-09 | 广州慧睿思通信息科技有限公司 | The uplink synchronisation method when RRC state of UE is FACH state in WCDMA direction-finding system |
| CN109644511B (en) * | 2017-06-16 | 2020-05-12 | Oppo广东移动通信有限公司 | Random access signal transmission method and related product |
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