CN101682591B - Method of performing random access in a wireless communication system - Google Patents
Method of performing random access in a wireless communication system Download PDFInfo
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- CN101682591B CN101682591B CN2007800406920A CN200780040692A CN101682591B CN 101682591 B CN101682591 B CN 101682591B CN 2007800406920 A CN2007800406920 A CN 2007800406920A CN 200780040692 A CN200780040692 A CN 200780040692A CN 101682591 B CN101682591 B CN 101682591B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
- H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0866—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a dedicated channel for access
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A method of performing random access in a wireless communication system is disclosed. The method of performing random access in a user equipment of a wireless communication system which uses multiple carriers includes transmitting a preamble for random access to a network, receiving a random access response message from the network in response to the preamble, transmitting a connection setup request message to the network, the connection setup request message requesting connection establishment with the network, and receiving a first message from the network, the first message including connection setup information and contention resolution information in a random access procedure.
Description
Technical field
The present invention relates to wireless communication system, especially, relate to a kind of method that inserts at random of in wireless communication system, carrying out.
Background technology
According to asynchronous mobile communiation system standard (3GPP: in WCDMA third generation partner program) (WCDMA) system; Comprise to the example that subscriber equipment transmits the downlink transmission channel of data from network (UTRAN:UMTS terrestrial radio electricity access network): the downlink sharied signal channel (DL-SCH) of the broadcast channel of transfer system information (BCH) and transmission customer service or control messages.Can transmit the professional or control messages of down link multicast or broadcast service (MBMS: multimedia broadcasting and multicast service) via DL-SCH or independent Multicast Channel (MCH).Simultaneously, comprise from the example of subscriber equipment: transmit the RACH (RACH) of initial control messages and the uplink shared channel (UL-SCH) of transmission customer service or control messages to the uplink transmission channel of network transmission data.
Hereinafter, with the RACH that describes in the WCDMA system.RACH is used for the weak point length data is sent to up link, and some RRC message, can transmit via RACH such as RRC connection request message, cell update message and URA updating message.In addition, public control channel (CCCH), DCCH (DCCH) or Dedicated Traffic Channel (DTCH) (its be logic channel one) can be mapped to RACH, and this RACH is of transmission channel.In addition, this RACH (its be transmission channel) is mapped to Physical Random Access Channel (PRACH) once more, and this Physical Random Access Channel (PRACH) is of physical channel.
If the physical layer of the media interviews of subscriber equipment controls (MAC) layer order subscriber equipment goes to carry out the PRACH transmission; Then the physical layer of this subscriber equipment is selected an access slot and a signature, and according to selected result the PRACH preamble is sent to up link.Access slot in 1.33ms length transmits this preamble in the period, and selects in 16 kinds of signatures one signature and in certain initial length of this access slot it is transmitted.
If subscriber equipment transmits preamble, then response signal is transmitted via obtaining indicator channel (AICH) (it is a downlink physical channel) in the base station.The AICH that is transmitted in response to preamble transmits following signature, and this signature is to be selected by preamble in certain initial time period of the access slot corresponding with the access slot that wherein transmits preamble.At this moment, this base station is transmitted via the signature that transmits from AICH and is confirmed (ACK) or NACK (NACK).
If subscriber equipment receives ACK, then this subscriber equipment is through using the message part that transmits 10ms or 20ms corresponding to orthogonal variable spreading factor (OVSF) sign indicating number of the signature that transmits.If subscriber equipment receives NACK, then the MAC of UE orders the physical layer of subscriber equipment after the appropriate time period, to carry out the PRACH transmission once more.Simultaneously, if subscriber equipment does not receive the AICH corresponding to the preamble that transmits, then this subscriber equipment given access slot after with than the new preamble of the higher leveled more high power transmission of previous preamble.
Hereinafter, with describing subscriber equipment transmits message through the RACH in the use WCDMA system example.
Under the situation of first example, the subscriber equipment that is in idle pulley sends initial control messages to network via RACH.Normally, interim the time when subscriber equipment with Network Synchronization, and hope to obtain radio resource when data are sent to up link, this subscriber equipment use RACH when subscriber equipment.For example,, and insert new sub-district first if subscriber equipment is powered up, the system information in the sub-district that the then common and downlink synchronization of this subscriber equipment, and reception subscriber equipment hopes to insert.After receiving system information, this subscriber equipment transmits and is used for the access request message that RRC connects.Yet, owing to subscriber equipment does not have and Network Synchronization temporarily, and still not obtaining the radio resource of up link, this subscriber equipment uses RACH.In other words, this user equipment requests network is provided for the radio resource of connection request transmission of messages via RACH.The base station that corresponding radio resource is provided by request to this subscriber equipment, makes this subscriber equipment can transmit RRC connection request message appropriate radio resources allocation.Then, this subscriber equipment can send RRC connection request message to network via radio resource.
Under the situation of second example, with under RRC type and the state that network is connected, the subscriber equipment that is in the RRC connection mode uses RACH at subscriber equipment.In this case, give subscriber equipment according to the radio resource scheduling of network with radio resources allocation, and subscriber equipment sends data to network via the radio resource that distributes.Yet, if the data that are transmitted do not remain in the buffer of subscriber equipment again, will the not reallocate radio resource of up link of this network.This is because giving the subscriber equipment that does not have data to transmit with the radio resources allocation of up link is poor efficiency.
Periodically, perhaps when specific incident takes place, give network with the buffer status report of subscriber equipment.If new data appear in the buffer of the subscriber equipment that does not have radio resource, owing to do not distribute to the radio resource of the up link of subscriber equipment, this subscriber equipment uses RACH.In other words, subscriber equipment provides transfer of data required radio resource via RACH request network.
RACH is a uplink common channel, and is the network of the available channel of all subscriber equipmenies attempt initially being linked into to(for) hope.Therefore, if two or more subscriber equipmenies side by side use RACH, conflict possibly occur.If conflict is owing to two or more subscriber equipmenies occur, then network should select one of subscriber equipment to go to carry out normal process, and should after solving by the caused problem of conflict, carry out the ensuing process that is used for other subscriber equipmenies.In this case, be necessary to limit following process, its process that is used for after the access at random of selected user equipment is avoided postponing, and solves by the caused problem of the conflict of other subscriber equipmenies.
Summary of the invention
Therefore, the present invention proposes a kind of method that inserts at random of in wireless communication system, carrying out, it has been eliminated basically because the limitation and the caused one or more problems of shortcoming of correlation technique.
An object of the present invention is to provide a kind of method that inserts at random of in wireless communication system, carrying out, wherein provide and insert at random to avoid the unnecessary delay in the wireless communication system.
Another object of the present invention provides a kind of method that inserts at random of in wireless communication system, carrying out, and wherein radio resource is used at wireless communication system effectively.
In order to realize these purposes and other advantage; And according to the object of the invention; As embodiment and broadly described herein; A kind of method that inserts at random of in the subscriber equipment of the wireless communication system that uses a plurality of carrier waves, carrying out, comprising: the preamble that will be used for inserting at random is sent to network; In response to preamble from network receiving random access response message; To connect and set up request message and be sent to network, the foundation that is connected of request message requests and network is set up in this connection; And, receiving first message from network, information and contention solution information are set up in the connection that this first message is included in the random access procedure.If the user equipment identifiers of subscriber equipment is included in this message, then recognizes its success aspect access at random fully, and set up the next process of information and executing according to this connection with establishing in a wide range.If the user equipment identifiers of subscriber equipment is not included in this message, then subscriber equipment is recognized its failure aspect access at random, and after the passage of preset time section, once more random access preamble is sent to network.
In another aspect of the present invention, a kind of method that inserts at random of in the subscriber equipment of the wireless communication system that uses a plurality of carrier waves, carrying out comprises: under subscriber equipment and state that network is connected, the preamble that will be used for inserting at random sends network to; From network receiving random access response message, this accidental access response message comprises casual user's device identifier of subscriber equipment in response to preamble; Ask this network allocation uplink resource; And, through using the casual user's device identifier and the proprietary user equipment identifier of subscriber equipment, receive at least one of resource grant message and contention solution message from network.
Description of drawings
Fig. 1 illustrates the network configuration of E-UMTS (Universal Mobile Telecommunications System of differentiation);
Fig. 2 is the sketch map that E-UTRAN (the universal terrestrial radio electricity access network of differentiation) is shown;
Fig. 3 A and Fig. 3 B are illustrated in the structure of the radio interface protocol between subscriber equipment (UE) and the E-UTRAN, and wherein Fig. 3 A is the sketch map of chain of command agreement, and Fig. 3 B is the sketch map of user plane protocol;
Fig. 4 is illustrated in the example of structure of the physical channel that uses in the E-UMTS system;
Fig. 5 is the flow chart that process according to an embodiment of the invention is shown; With
Fig. 6 is the flow chart that process according to another embodiment of the invention is shown.
Embodiment
Hereinafter, will easily understand structure of the present invention, operation and other characteristic through the preferred embodiments of the present invention, its example is shown in the accompanying drawing of following.The embodiment that describes after a while is the example that technical characterictic of the present invention is applied to E-UMTS (Universal Mobile Telecommunications System of differentiation).
Fig. 1 illustrates the network configuration of E-UMTS.E-UMTS is the system that comes from the WCDMAUMTS evolution of routine, and current the support by 3GPP (third generation partner program) of its basic standardization held.E-UMTS can also be known as LTE (long term evolution) system.The version 7 of 3GPP technical specification (third generation partner program, technical specification group radio access network) can relate to the details that obtain relevant UMTS and E-UMTS with version 8.
With reference to figure 1, E-UTRAN comprises base station (hereinafter, being called " eNodeB " perhaps " eNB "), and wherein each eNB is connected to each other via X2 interface.In addition, each of eNB is connected with subscriber equipment (UE) via radio interface, and is connected with EPC (block core of differentiation) via the S1 interface.EPC comprises Mobility Management Entity/system architecture evolution (MME/SAE) gateway.
Three lower levels of known OSI (open system interconnection) master pattern in the communication system can be based on, ground floor L1, second layer L2 and the 3rd layer of L3 will be categorized as at the radio interface protocol layer between UE and the network.The physical layer that belongs to ground floor L1 uses physical channel that information transfer service is provided.The effect of controlling the radio resource between UE and the network is played in the radio resource control (being abbreviated as hereinafter, " RRC ") that is positioned at the 3rd layer.For this reason, this rrc layer allows exchange RRC message between UE and network.This rrc layer can be positioned on the network node that comprises Node B, AG or the like with distributing, perhaps is positioned on Node B or the AG.
Fig. 2 is the sketch map that E-UTRAN (UMTS terrestrial radio electricity access network) is shown.In Fig. 2, hachure is partly represented the functional entity of user plane, and non-hachure is partly represented the functional entity of chain of command.
Fig. 3 A and Fig. 3 B are illustrated in the structure of the radio interface protocol between subscriber equipment (UE) and the E-UTRAN, and wherein Fig. 3 A is the sketch map of chain of command agreement, and Fig. 3 B is the sketch map of user plane protocol.With reference to figure 3A and Fig. 3 B, radio interface protocol vertically comprises physical layer, data link layer and network layer, and flatly comprises user plane that is used for data information transfer and the chain of command that is used for the signaling transmission.Can be based on three lower levels of known OSI(Open Systems Interconnection) master pattern in the communication system, the protocol layer among Fig. 3 A and Fig. 3 B is categorized as L1 (ground floor), L2 (second layer) and L3 (the 3rd layer).
Use physical channel information transfer service to be provided as the physical layer of ground floor to the upper strata.Physical layer (PHY) is connected to media interviews controls (being abbreviated as hereinafter, " the MAC ") layer on physical layer via transmission channel.Data are transmitted between MAC layer and physical layer via transmission channel.In addition, data, and particularly, are transmitted between another physical layer of physical layer of transmitter side and receiver side between different physical layers via physical channel.The physical channel of E-UMTS is modulated according to OFDM (OFDM) scheme, and time and frequency are used as radio resource.
Media interviews controls (hereinafter, being abbreviated as " the MAC ") layer of the second layer provides service via logic channel to the control of the radio link on the MAC layer (being abbreviated as hereinafter, " RLC ") layer.The reliable data passes of rlc layer support of the second layer.In order to transmit IP divide into groups (for example, IPv4 or IPv6) in the radio communication period of narrow bandwidth effectively having, the PDCP layer of the second layer (L2) is carried out header-compressed, comprises the size of the bigger IP packet header of unnecessary control information with reduction.
The radio resource that is positioned at the 3rd layer minimum part is controlled (hereinafter; Be abbreviated as " RRC ") layer only be limited in the chain of command; And with the configuration of the radio bearer (being abbreviated as hereinafter, " RB ") of responsible control logic, transmission and physical channel, reconfigure with discharge relevant.In this case, RB refers to the service that is used for the data passes between UE and the UTRAN that is provided by the second layer.
As the downlink transmission channel of carrying the data from the network to UE, the broadcast channel that carries system information (BCH) is provided, carry the PCH (PCH) of beep-page message and carry customer service or the downlink sharied signal channel of control messages (SCH).Can transmit the professional or control messages of down link multicast or broadcast service via down link SCH or additional down link Multicast Channel (MCH).Simultaneously, as the uplink transmission channels that carries the data from UE to the network, the RACH (RACH) that carries initial control messages is provided and has carried customer service or the uplink shared channel of control messages (UL-SCH).
As be positioned on the transmission channel and with the logic channel that transmission channel shines upon, broadcast channel (BCCH), Paging Control Channel (PCCH), public control channel (CCCH), multicast control channel (MCCH) and multicast service channel (MTCH) are provided.
In the E-UMTS system, on down link, use OFDM, and on up link, use single-carrier frequency division multiple access (SC-FDMA).Use the OFDM scheme of a plurality of carrier waves to be the unit Resources allocation, and utilize OFDM (OFDMA) as access scheme with a plurality of subcarriers that comprise one group of carrier wave.
The physical layer of OFDM or OFDMA scheme is divided a plurality of groups with active carriers, and sends each group to the different received side.The radio resource (its be through the temporal frequency area limiting on two dimensional range) of distributing to each UE comprises continuous sub-carriers.Temporal frequency zone in OFDM or OFDMA scheme is the rectangular in form through time and sub-carrier coordinates cutting.In other words, a temporal frequency zone can be through the rectangular in form at least one symbol on the time shaft and the cutting of the subcarrier on frequency axis.Such temporal frequency zone can be assigned to up link and be used for specific UE, and perhaps eNB can send the temporal frequency zone to specific UE in down link.In order on two dimensional range, to limit such temporal frequency zone, with providing from having the number of the OFDM symbol that the point of skew begins and the number of subcarrier continuously with reference point.
The E-UMTS of current argumentation uses the 10ms radio frame that comprises 20 sub-frame.That is, a sub-frame has the length of 0.5ms.Resource module comprises a sub-frame and 12 number of sub-carrier, and its each be 15kHz.One sub-frame comprises a plurality of OFDM symbols, and the part of a plurality of OFDM symbols (for example, first symbol) can be used for the transmission of L1/L2 control information.
Fig. 4 is the figure that is illustrated in the physical channel structure of using among the E-UMTS.In Fig. 4, subframe comprises L1/L2 control information transmission range (hachure part) and transfer of data district (non-hachure part).
Fig. 5 is the flow chart that process according to an embodiment of the invention is shown.In the embodiment of Fig. 5, technical characterictic of the present invention is applied to being in the process of the initial random access of the subscriber equipment in the idle pulley.
With reference to figure 5, subscriber equipment sends random access preamble to base station eNB [S51].In other words, subscriber equipment is chosen in the particular signature among a plurality of signatures via an access slot, and the signature that will select sends the base station to.At this moment, this random access preamble can comprise uplink message information or channel measurement information, makes this base station can carry out the resource allocation that is used for uplink message transmission.In this case, if at least two subscriber equipmenies such as identical signature, side by side carry out the uplink transmission of random access preamble through using same radio resources, then conflict possibly take place.
Base station in response sends accidental access response message to subscriber equipment [S52] in random access preamble.Accidental access response message comprise the signature that transmits from subscriber equipment, random access preamble transmission permission or refusal information, distribute to the interim cell-radio network temporary identifier (interim C-RNTI) of this subscriber equipment, with control information relevant or the like with the transmission of RRC connection request message.Comprise radio resource allocation information, message size and the radio parameter (modulation and coded message and hybrid ARQ information) that is used for RRC connection request transmission of messages with the relevant control information of transmission of RRC connection request message.
The base station sends subscriber equipment to via the signaling information that the L1/L2 control channel will be used for receiving random access response message.Signaling information comprises the radio net of the access at random temporary identifier (RA-RNTI) and the transmission parameter relevant with the transmission of accidental access response message of the transmission of indicating accidental access response message.Because RA-RNTI is forwarded to the base station via system information or the like from subscriber equipment in advance; So subscriber equipment obtains signaling information through using RA-RNTI via the L1/L2 control channel, and the signaling information that obtains through use and receiving random access response message.
If signature that transmits from subscriber equipment and the License Info that is used for signature transmission are included in accidental access response message, then subscriber equipment sends RRC connection request message to base station [S53].At this moment, subscriber equipment sends RRC connection request message to base station through the radio parameter that uses uplink radio resource allocation information, message size and be included in the accidental access response message.RRC connection request message comprises the user equipment identifiers that is used for identifying user equipment.The example of user equipment identifiers comprises broadband UE identifier, such as IMSI International Mobile Subscriber Identity (IMSI) or Temporary Mobile Subscriber Identity (TMSI).
If be included in the accidental access response message from the signature of subscriber equipment transmission and the refusal information of signature transmission; If the signature that perhaps transmits from subscriber equipment is not included in the accidental access response message; The subscriber equipment random access preamble that after certain time, retransfers then, and do not transmit RRC connection request message.
If receive RRC connection request message from subscriber equipment, then the rrc layer of base station connects RRC and sets up message or RRC contention and solve message and send subscriber equipment to.Preferably, rrc layer transmits a RRC message, and it comprises that message is set up in the RRC connection and the RRC contention solves message.For another example, in that being connected, sets up after message sends subscriber equipment to RRC, and the base station can be transmitted the RRC contention and solved message.
Comprise that RRC connects the RRC message of setting up message and RRC contention solution message if transmitted one, then can reduce the filling that is included in this message, can use radio resource effectively thus.RRC message comprises the user equipment identifiers of subscriber equipment successful aspect access at random.Preferably, user equipment identifiers is the user equipment identifiers that is included in the RRC connection request message, for example IMSI and TMSI.
If a plurality of subscriber equipmenies connect conflict each other during the transmission course of setting up message at random access preamble or RRC, then only a subscriber equipment of successfully having carried out to insert at random connects according to RRC and sets up the message operation.In this case, the success of successful subscriber equipment refers to the random access preamble that transmits from subscriber equipment and is successfully received by the base station aspect access at random, and the RRC connection request is successfully carried out then.
As stated, be included in RRC in the RRC message and connect and to set up message and comprise wideband user equipment identifier, such as at the IMSI and the TMSI of subscriber equipment successful aspect the access at random.Subscriber equipment is used to receive the required control information of RRC message through using its interim C-RNTI to receive via the L1/L2 control channel.For example, subscriber equipment can be through using interim C-RNTI, and according to the result of cyclic redundancy code (CRC) test of particular channel, whether the particular channel of identification L1/L2 control channel is transmitted to it oneself.For another example, if receive interim C-RNTI via the L1/L2 control channel, then subscriber equipment receives the message by interim C-RNTI indication.If particular channel is transmitted to subscriber equipment, then subscriber equipment receives the downlink channel that sends the data field to through using the control information that transmits via particular channel, for example, and the RRC message of downlink sharied signal channel (DL-SCH).
Connect and set up in the message if the wideband user equipment identifier that transmits via RRC connection request message is included in RRC, then subscriber equipment is recognized its success aspect access at random, and RRC connected sets up message and be identified as its message.At this moment, subscriber equipment as special-purpose C-RNTI, is used for casual user's device identifier (interim C-RNTI) to carry out after a while and the communicating by letter of network.
If the wideband user equipment identifier that transmits via RRC connection request message is not included in the RRC message, then subscriber equipment is recognized its failure aspect access at random.In addition, if section does not receive the RRC message that comprises wideband user equipment identifier at a time, then subscriber equipment is recognized its failure aspect access at random.At this moment, subscriber equipment can begin random access procedure once more through after certain time period, random access preamble being retransferred to the base station.
The above-mentioned embodiment of the present invention can be applied in radio bearer setup complete or transfer the random access procedure of the initial access of carrying out afterwards.
Fig. 6 is the flow chart that process according to another embodiment of the invention is shown.In the embodiment of Fig. 6, technical characterictic of the present invention is applied to being in the random access procedure of the subscriber equipment of RRC connection mode.For example, do not give subscriber equipment if there is to be used for to send to the radio resources allocation of the data of base station, then subscriber equipment can transmit data through random access procedure via RACH.The embodiment that describes hereinafter can be applied to following situation, this situation promptly, the base station is not synchronous with user equipment uplink, even it has the down link data that will send the subscriber equipment that is in the RRC connection mode to.
With reference to figure 6, subscriber equipment is sent to base station eNB [S61] with random access preamble, and receives the accidental access response message [S62] in response to this random access preamble from the base station.Because step S61 and S61 are identical with S51 and the S52 of Fig. 5, its detailed description will be omitted.
If signature that transmits from subscriber equipment and the License Info that is used for signature transmission are included in accidental access response message, then subscriber equipment sends the MAC scheduling request information to base station [S63].At this moment, subscriber equipment is included in uplink radio resource allocation information, message size and radio parameter in the accidental access response message through use, sends the MAC scheduling request information to base station.Preferably, the MAC scheduling request information comprises the wideband user equipment identifier that is used for identifying user equipment.The example of user equipment identifiers comprises broadband UE identifier, such as IMSI International Mobile Subscriber Identity (IMSI) or Temporary Mobile Subscriber Identity (TMSI).The embodiment of Fig. 6 is different with the embodiment of Fig. 5, and difference is that dispatch request and contention solution process carried out by the MAC layer.
If be included in the accidental access response message from the signature of subscriber equipment transmission and the refusal information of signature transmission; If the signature that perhaps transmits from subscriber equipment is not included in the accidental access response message; The subscriber equipment random access preamble that after certain time, retransfers then, and do not transmit the MAC scheduling request information.
If receive the MAC scheduling request information from subscriber equipment, then the MAC layer of base station sends resource grant message and MAC contention solution message to subscriber equipment [S64].The base station can side by side transmit resource grant message and the MAC contention solves message, perhaps can after transmitting resource grant message, transmit the MAC contention and solve message.
Can transmit resource grant message via the L1/L2 control channel, perhaps can be used for the physical channel of resource allocation,, transmit resource grant message via the L1 signaling such as absolute grant channel (AGCH) or relative grant channel (RGCH) through use.On the other hand, can transmit the MAC contention with the type that MAC controls PDU and solve message.Alternatively, this base station can be through transmitting resource grant message and the mutual type that merges with a MAC control PDU of MAC contention solution message with them.In addition, can consider resource grant message and MAC contention to be solved the method that message sends subscriber equipment to via the L1/L2 control channel.MAC control PDU comprises header and payload, and wherein header can comprise that information and indexed resource grant message or the MAC contention of indication MAC control PDU solve message and be included in the designator among the MAC control PDU.Payload can comprise that resource grant message or MAC contention solve the content of message.
Solve message if transmit the MAC contention with the type of MAC control PDU, then MAC control PDU comprises the special-purpose C-RNTI of subscriber equipment successful aspect access at random.If the special-purpose C-RNTI of subscriber equipment is included among the MAC control PDU, the problem that radio resource is wasted possibly appear.Correspondingly, successfully having carried out at random in certain time period, the special-purpose C-RNTI of a plurality of subscriber equipmenies of access can be included in the MAC contention solution message.
Because the subscriber equipment that is in the RRC connection mode is attempting inserting at random before to know its special-purpose C-RNTI in advance, so the resource grant message of the special-purpose C-RNTI that comprises the subscriber equipment that passes through contention is transmitted in the base station.If resource grant message transmits via the L1 signaling, then when receiving the resource grant message that comprises special-purpose C-RNTI via resource allocation channel or L1/L2 control channel, subscriber equipment is identified as its message with resource grant message.Yet when receiving the resource grant message of the special-purpose C-RNTI that does not comprise subscriber equipment via resource allocation channel or L1/L2 control channel, subscriber equipment is not identified as its message with resource grant message.
If the type with MAC control PDU transmits resource grant message, the control information that then is included in the L1/L2 control channel comprises the transmission of the special-purpose C-RNTI of subscriber equipment with indication MAC control PDU.Therefore, subscriber equipment only when special-purpose C-RNTI is included in the L1/L2 control channel, receives resource grant message.
The control information that transmits from the base station with indication MAC contention solution transmission of messages via the L1/L2 control channel comprises interim C-RNTI.Therefore, subscriber equipment can receive the MAC contention and solve message only when interim C-RNTI be included in the L1/L2 control channel.Interim C-RNTI is the user equipment identifiers that is distributed via accidental access response message by the base station.If receive interim C-RNTI via the L1/L2 control channel, then subscriber equipment solves message through using the control information that transmits via the L1/L2 control channel to receive the MAC contention.The MAC contention solves message and comprises the wideband user equipment identifier of passing through contention.
If resource grant message is sent to subscriber equipment, and via the data field MAC contention is solved message and be sent to subscriber equipment, will describe the operation of subscriber equipment hereinafter via the L1/L2 control channel.
If before receiving resource grant message from the base station; Receive the interim C-RNTI of subscriber equipment via the L1/L2 control channel; And the MAC contention that receives by interim C-RNTI indication solves message, and then subscriber equipment identification MAC contention solves the special-purpose C-RNTI whether message comprises subscriber equipment.If the special-purpose C-RNTI of subscriber equipment is included in the MAC contention and solves in the message; Then subscriber equipment recognizes its success aspect access at random, and via the reception of (it comprises the special-purpose C-RNTI of subscriber equipment) of L1/L2 control channel monitoring resources grant message.If in certain time period that is provided with in advance, do not receive resource grant message, then subscriber equipment begins random access procedure once more.If in certain time period, receive resource grant message, then subscriber equipment is sent to the base station via the radio resource that distributes through resource grant message with uplink data.
If subscriber equipment is before receiving MAC contention solution message; Receive resource grant message (it comprises special-purpose C-RNTI) via the L1/L2 control channel; Then subscriber equipment is recognized it and has successfully been carried out access at random; And solve message, and uplink data is sent to the base station via the radio resource that distributes through resource grant message no matter whether receive the MAC contention.If subscriber equipment is after receiving resource grant message, receive its interim C-RNTI via the L1/L2 control channel, this subscriber equipment is ignored the grouped data by interim C-RNTI indication.
In Fig. 5 and Fig. 6; Contention solves message and sets up message or resource grant message and can comprise from the subscriber equipment transmission and be included in the signature the random access preamble, perhaps relevant with the radio resource that is used for random access preamble information with being connected.For another example, contention solves message and sets up message or resource grant message can comprise and the relevant information of radio resource that is used to transmit connection request message or scheduling request information with being connected.Radio resource comprises the information with frequency and/or time correlation.At this moment; If preamble signature from the subscriber equipment transmission; Perhaps relevant with radio resource information is included in contention solution message and sets up in message or the resource grant message with being connected; Then subscriber equipment solves message with contention and sets up message or resource grant message is identified as its message with being connected, and solves message and be connected the content of setting up message or resource grant message and operated according to contention.
Above-mentioned embodiment is through making up realization with structural element of the present invention and characteristic with predefined type.Each of structural element or characteristic should be considered to selectable except stipulating individually.Each of structural element or characteristic can need not to realize with other structural element or characteristics combination.In addition, some structural element and/or characteristic can make up to constitute embodiments of the invention each other.The operating sequence of describing in an embodiment of the present invention can change.Some structural element or the characteristic of an embodiment can comprise in another embodiment, perhaps can use corresponding structure element or the characteristic replacement of another embodiment.In addition; Be apparent that, by means of modification, after submitting the application to; Can constitute embodiment or increase new claim quoting specific rights some claims that require and another claim combination of quoting these other claims beyond specific rights requirement.
Embodiments of the invention have been described in the transfer of data and the reception that have been based between base station and the subscriber equipment.In this case, the base station refers to the terminal node of network, and it carries out the direct communication with subscriber equipment.According to circumstances, can carry out the specific operation that has been described to by the base station execution by the upper layer node of base station.In other words, be apparent that the various operations that confession and communications of user equipment are carried out in network (it comprises a plurality of network nodes with the base station) can be carried out by the network node beyond base station or the base station.Can use term,, replace the base station such as fixed station, Node B, eNodeB (eNB) and access point.In addition, can use term,, replace subscriber equipment such as mobile radio station and mobile subscriber station.
Can pass through variety of way according to embodiments of the invention, for example, hardware, firmware, software or its make up to be realized.If according to embodiments of the invention is through hard-wired, then can realize through one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processing appts (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor or the like according to the accidental access method in the wireless communication system of the embodiment of the invention.
If realize through firmware or software according to embodiments of the invention, then perhaps module, process or the function of operation realize in the function that can as above describe through a kind of execution according to the accidental access method in the wireless communication system of the embodiment of the invention.Software code can be stored in the memory cell, and can be driven by processor then.Memory cell can be arranged on the inside or the outside of processor, to come receiving data to processor transmission data with from processor via the variety of way that is well known.
According to the present invention, in the random access procedure of wireless communication system, can avoid unnecessary delay, and can use radio resource effectively.
It will be apparent to those skilled in the art that under the situation that does not break away from spirit of the present invention and essential characteristic, can be with other specific forms embodiment of the present invention.Therefore, to be considered aspect all be illustrative rather than restrictive for above embodiment.Scope of the present invention will be confirmed by the proper explanations of appending claims, and all changes in equivalent scope of the present invention are included in the scope of the present invention.
Industrial applicibility
Can in wireless communication system, use the present invention such as GSM or wireless internet system.
Claims (6)
1. in the subscriber equipment that is in idle pulley of the wireless communication system that uses a plurality of carrier waves, carry out the method that inserts at random for one kind, this method comprises:
The preamble that will be used for inserting at random is sent to network;
From said network receiving random access response message, said accidental access response message comprises the interim cell-radio network temporary identifier C-RNTI that gives said subscriber equipment in response to this preamble;
Radio resource is controlled RRC connection request message be sent to said network, the foundation that is connected of this RRC connection request message request and said network, wherein said RRC connection request message comprises the user equipment identifiers that is used to discern said subscriber equipment; And
Receive first message from said network, at least one in information and the contention solution information set up in the connection that this first message is included in the random access procedure,
Wherein, If said first message comprises the user equipment identifiers that said subscriber equipment sends through RRC connection request message; Said subscriber equipment is recognized random access procedure success, and use said interim C-RNTI as special-purpose C-RNTI to be used to carry out and the communicating by letter of said network.
2. method according to claim 1, the user equipment identifiers that wherein is included in the said RRC connection request message is the wideband user equipment identifier of said subscriber equipment.
3. method according to claim 1 further comprises: before the step of said reception first message, use said interim C-RNTI to receive the control information that is used to receive said first message via control channel.
4. method according to claim 1 if wherein the user equipment identifiers of said subscriber equipment is included in said first message, is then set up the said subscriber equipment of information operating according to said connection.
5. method according to claim 1 further comprises: if the user equipment identifiers of said subscriber equipment is not included in said first message, random access preamble is sent to said network from subscriber equipment.
6. method according to claim 2, wherein said wideband user equipment identifier are IMSI International Mobile Subscriber Identity (IMSI) or Temporary Mobile Subscriber Identity (TMSI).
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| KR1020070012749 | 2007-02-07 | ||
| PCT/KR2007/005384 WO2008054112A2 (en) | 2006-10-30 | 2007-10-30 | Methods of performing random access in a wireless communication system |
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| CN2007800387934A Active CN101529748B (en) | 2006-10-30 | 2007-10-30 | Method for transitioning between multiple reception levels |
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| TWI426805B (en) | 2014-02-11 |
| JP2010507322A (en) | 2010-03-04 |
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| CN101690374B (en) | 2012-12-26 |
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| TWI426802B (en) | 2014-02-11 |
| TWI429311B (en) | 2014-03-01 |
| KR100902897B1 (en) | 2009-06-15 |
| TW200835366A (en) | 2008-08-16 |
| KR101233181B1 (en) | 2013-02-15 |
| CN101682591A (en) | 2010-03-24 |
| KR20080039176A (en) | 2008-05-07 |
| CN101529748B (en) | 2013-03-27 |
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