CN101175309A - Device and method for transmission of accidental access response message - Google Patents
Device and method for transmission of accidental access response message Download PDFInfo
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Abstract
The present invention relates to a method for transmitting a random access response message, which includes four steps. Firstly, in a random access channel, a base station detects the possible random access preamble signal; secondly, the base station assigns the downlink shared data channel (DL-SCH) resource used by the transmission of the random access response message and divides the downlink shared data channel (DL-SCH) resource into one or more partial channel resources; thirdly, the base station transmits a downlink control channel and indicates the assigned DL-SCH resource, the methods of dividing the DL-SCH resource into multiple partial channel resources and control information, such as other transmission formats, etc.; fourthly, the base station sets an appropriate power in each partial channel resource of the DL-SCH resource indicated by the control channel and sends the random access response message. The method of the present invention can optimize the number of the occupied control channels when the base station sends the random access response message, meanwhile, the method of the present invention can carry out power control on the random access response message according to the channel quality status reported by user equipment.
Description
Technical field
The present invention relates to wireless communication system, relate in particular a kind of in the random access procedure of wireless communication system the equipment and the method for transmission of accidental access response message.
Background technology
Now, 3GPP standardization body has set about beginning its existing system standard is carried out long-term evolution (LTE).In the middle of numerous physical layer transmission technology, be the focus of research based on the downlink transfer technology of OFDM (OFDM) with based on the uplink technology that single-carrier frequency division multiple access inserts (SCFDMA).Be a kind of multi-carrier modulation communication technology on the OFDM technological essence, its basic principle is the data flow of a two-forty to be decomposed into several rate data streams transmit simultaneously on one group of mutually orthogonal subcarrier.The OFDM technology is because its multicarrier character has performance advantage aspect a lot.It on the SCFDMA technological essence a kind of single carrier transmission technology, its signal peak-to-average is lower than (PAPR), thereby the power amplifier of portable terminal can be with higher efficient work, enlarge the coverage of sub-district, by adding Cyclic Prefix (CP) and frequency domain equalization, it is lower that it handles complexity simultaneously.
According to existing discussion result about LTE, be LTE system descending frame structure as shown in Figure 1, Radio Resource in the LTE system is meant time and the frequency resource that system or subscriber equipment can take, can (101-103) do differentiation with radio frames (radio frame) for unit, the time span of radio frames is identical with the time span of the radio frames of WCDMA system, and promptly its time length is 10ms; Each frame is subdivided into a plurality of subframes (sub-frame) (104-107), and present hypothesis is that each radio frames comprises 20 subframes, and the time span of subframe is 0.5ms; Each subframe comprises a plurality of OFDM symbols again, and according to present hypothesis, the time span of effective OFDM symbol is about 66.7 μ s in the LTE system.The time span of the CP of OFDM symbol can have two kinds, promptly the time span of short CP is approximately 4.8 μ s, the about 16.7 μ s of the time span of long CP, long CP subframe is used for many Cell Broadcast CB/multicasts and the very large situation of radius of society, short CP subframe (108) comprises 7 OFDM symbols, and long CP subframe (109) comprises 6 OFDM symbols.According to present discussion result, Transmission Time Interval (TTI) is 1ms, promptly equals the time span of two subframes.
Fig. 2 is a LTE system uplink frame structure, and with the downlink frame similar, the time span of its radio frames (201,202,203) is all 10ms mutually with WCDMA; Each frame is subdivided into a plurality of subframes (204-207), and present hypothesis is that each radio frames comprises 20 subframes, and the time span of subframe is 0.5ms; Each subframe comprises a plurality of SCFDMA symbols again, according to present hypothesis, SCFDMA symbol in the LTE system is divided into two kinds, comprise two short symbols (214 in the subframe, 215), length effective time of each short symbol is about 33.33 μ s, is called short block (Short block) in the current discussion; Comprise 6 long symbols (208～213) in a subframe simultaneously, each long symbol length effective time is 66.67 μ s, is called long piece (Longblock) in the current discussion.Short symbol is used to transmit the reference information of coherent demodulation, also can be used for transmit ascending data and control information simultaneously; Long symbol is used for transmit ascending data and control information.According to present discussion result, Transmission Time Interval (TTI) is 1ms, promptly equals the time span of two subframes.
In current LTE discusses, the mode that has two kinds of basic channel resources to divide.First kind is local formula transmission channel, promptly some continuous subcarriers is divided into a channel as Resource Block, and this method helps utilizing multi-user diversity, thereby higher throughput of system is provided.Another kind is the distributed transmission channel, the running time-frequency resource of promptly distributing to some users be distributed to whole with certain rules or partial-band in, thereby the gain of frequency diversity is bigger.
The scheduling of user data and transmission are to be base unit with the Resource Block.In current discussion, the notion of Physical Resource Block (Physical resourceblock) and virtual resource blocks (Virtual resource block) has been proposed about LTE down channel resources dividing mode.Physical Resource Block comprises M continuous sub-carriers on frequency domain, comprise N continuous OFDM symbol simultaneously in time.According to current discussion result, the value of M is 12, and promptly each Resource Block comprises 12 subcarriers in an OFDM symbol, and the band width of so local formula Resource Unit is 180KHz; The possible value of other M needs further research.Virtual resource blocks is abstract to channel resource on Physical Resource Block, and virtual resource blocks is divided into distributed virtual resource block and local formula virtual resource blocks.Distributed virtual resource block is corresponding to the resource of distributed transmission channel, and local formula virtual resource blocks is corresponding to the resource of local formula transmission channel.
In current discussion, adopted the notion of Resource Unit (Resource unit) about LTE uplink channel resources dividing mode.Resource Unit is further divided into local formula Resource Unit (LocalizedRU) and distributed resource units (Distributed RU).Local formula Resource Unit comprises a continuous M subcarrier on frequency domain, comprise N long SCFDMA symbol simultaneously in time; Distributed resource units comprises the subcarrier that M frequency interval equates on frequency domain, comprise N long SCFDMA symbol simultaneously in time.According to current discussion result, consistent with the parameter of down channel, the value of M is 12, and promptly each Resource Unit comprises 12 subcarriers in a SCFDMA symbol, the band width of so local formula Resource Unit is 180KHz, and the possible value of other M needs further research.It should be noted that in current discussion and be not precluded within the short SCFDMA symbol and transmit data, so the actual running time-frequency resource that takies of Resource Unit can comprise the resource in the short SCFDMA symbol.
For the convenience of narrating, the unified in the following description base unit that uses Resource Block to represent the up-downgoing dispatch channel resource of the present invention.For down direction, Resource Block is corresponding to local formula virtual resource blocks or distributed virtual resource block; For the up direction Resource Block corresponding to local formula Resource Unit or distributed resource units.
According to existing discussion result about LTE, Fig. 3 is the interaction flow of asynchronous access operation at random.As shown in Figure 3, subscriber equipment at first sends arbitrary access front signal to the base station on the Random Access Channel of system configuration, be message 1 (301), according to current discussion, this arbitrary access front signal can comprise the information of 6 bits at most, can be used for carrying subscriber equipment and initiate the reason (initial random access, switching, ascending resource request etc.) that inserts at random, can carry the information of the down channel quality between base station and the subscriber equipment or information on path loss etc.Next each possible arbitrary access front signal is detected in the base station, and with the threshold value of setting relatively, when finding that one or more arbitrary access front signal surpasses threshold value, the base station is the corresponding accidental access response message that generates of each arbitrary access front signal accordingly, be message 2 (302), message (302) comprises the Timing Advance that calculates according to arbitrary access front signal, send the ascending resource of follow-up distribution etc. for subscriber equipment, whether the current also not decision of 3GPP standardization body in addition, base station currently also do not distribute the user equipment allocation of sub-district unique identification (C-RNTI) and send C-RNTI those in message (302).Next subscriber equipment is after receiving message (302), in message (302), send uplink control message on the ascending resource of appointment, be message 3 (303), can comprise other random access informations in this message, perhaps two layers/control messages of three layers (L2/L3) etc.The base station is after receiving message (303), send Downlink Control Information, promptly message 4 (304), merit attention to such an extent that be that message 4 may be a piece of news, may be the general designation of many downstream messages, current 3GPP standardization body also have finally to determine the concrete structure of message 4 yet.
Accidental access response message (302) in the access process has at random as shown in Figure 1 proposed several possible transmission methods in current discussion.First method is that the base station is mapped to the response message to each arbitrary access front signal respectively in one deck/two layer (L1/L2) control channel, promptly utilizes the shared control channel that distributes ascending resource or downlink resource.The shortcoming of this method is need take a plurality of L1/L2 control channels when the base station will send response message to a plurality of arbitrary access front signals, and is bigger to the expense of control channel.It is to adopt to be similar to send the processing method that downlink data adopts that second kind of transmission inserts the method that needs message at random, promptly at first use a L1/L2 control channel allocation of downlink shared data channel, then one or more accidental access response message is being formed a block of information, and calculate CRC and coding, thereby in descending shared data channel, send.The shortcoming of this method is a plurality of accidental access response message combined codings, can not do the power control of response to each accidental access response message, thereby power overhead is bigger.
Summary of the invention
The purpose of this invention is to provide a kind of in the random access procedure of wireless communication system the equipment and the method for transmission of accidental access response message.
According to an aspect of of the present present invention, a kind of method of base station transmits accidental access response message comprises the steps:
A) possible arbitrary access front signal is detected in the base station in Random Access Channel;
B) used descending shared data channel (DL-SCH) resource of base station assigns transmission of accidental access response message, and it is divided into one or more local channel resource;
C) base station transmits down control channel, is the DL-SCH resource division control informations such as the mode of several local channel resources and other transformats at the DL-SCH resource that indication distributes;
D) base station is provided with suitable power and sends accidental access response message in each local channel resource of the DL-SCH resource of control channel indication.
According to another aspect of the present invention, a kind of subscriber equipment is handled the method for accidental access response message, comprises the steps:
A) arbitrary access front signal is selected and sent to subscriber equipment in Random Access Channel;
B) subscriber equipment detects the control channel of accidental access response message, obtain the base station assigns transmission of accidental access response message the DL-SCH resource, the DL-SCH resource division is the mode of several local channel resources and the information of other transformats;
C) whether subscriber equipment base stations detected in each local channel resource of the DL-SCH resource of control channel indication has sent the response message to its arbitrary access front signal;
D) subscriber equipment sends ascending control information on the ascending resource of base station assigned.
According to another aspect of the present invention, a kind of equipment of base station transmits accidental access response message comprises transmission/reception, also comprises:
A) accidental access response message control information maker is used to generate the Downlink Control Information when sending accidental access response message;
B) accidental access response message encoder is used for accidental access response message is added CRC and coding;
C) physical channel Multiplexing module is used for the down control channel accidental access response message, shared data channel and other physical channels of accidental access response message is multiplexed into together;
D) physical channel demultiplexing module is used for demultiplexing and goes out arbitrary access front signal or other control informations that possible subscriber equipment sends;
E) descending control messages maker is used to generate descending control messages.
According to another aspect of the present invention, a kind of subscriber equipment is handled the equipment of accidental access response message, comprises transmission/reception, also comprises:
A) accidental access response message control information resolver is used for the control information whether base stations detected has sent accidental access response message, and resolves this control information;
B) accidental access response message decoder is used to resolve the data channel of accidental access response message, judges whether the base station is that it has sent response message;
C) physical channel demultiplexing module is used for control signaling and data message that demultiplexing goes out accidental access response message, and other Downlink Control Information;
D) physical channel Multiplexing module is used for arbitrary access front signal, ascending control information and other physical channels are multiplexed into together;
E) arbitrary access front signal maker module is used for selecting and generating arbitrary access front signal.
F) uplink control message maker is used to generate uplink control message.
Adopt method of the present invention, can reduce the number of the control channel that takies when the base station sends accidental access response message, support simultaneously accidental access response message to be carried out power control according to the channel quality condition of subscriber equipment report.
Description of drawings
Fig. 1 is the downlink frame structure of LTE system;
Fig. 2 is the uplink frame structure of LTE system;
Fig. 3 is asynchronous access process at random;
Fig. 4 is the equipment drawing that accidental access response message is handled in the base station;
Fig. 5 is the equipment drawing that subscriber equipment is handled accidental access response message;
Fig. 6 is the schematic diagram of embodiment 1;
Fig. 7 is the schematic diagram of embodiment 2.
Embodiment
The present invention proposes a kind of in the random access procedure of wireless communication system the method for transmission of accidental access response message, comprise the steps.
The operation of base station:
A) possible arbitrary access front signal is detected in the base station in Random Access Channel;
B) used descending shared data channel (DL-SCH) resource of base station assigns transmission of accidental access response message, and it is divided into one or more local channel resource;
C) base station transmits down control channel, is the DL-SCH resource division control informations such as the mode of several local channel resources and other transformats at the DL-SCH resource that indication distributes;
D) base station is provided with suitable power and sends accidental access response message in each local channel resource of the DL-SCH resource of control channel indication.
In the step a) of the present invention, possible arbitrary access front signal is detected in the base station in Random Access Channel, need to determine each arbitrary access front signal of response, handles the information that arbitrary access front signal carries, and correspondingly generates accidental access response message.
The base station is carried out absolute coding and transmission respectively to the response message of each arbitrary access front signal.
In step b) of the present invention, the DL-SCH resource is distributed according to the informational capacity of all accidental access response messages that current needs send in the base station.The number of supposing the current accidental access response message that need transmit is K, and the base station is divided into K local channel resource to this DL-SCH resource according to certain principle.
A kind of method that the DL-SCH resource is divided in the base station is that the base station is divided into K local channel resource to the shared data channel, takies the running time-frequency resource of similar number when just transmitting each accidental access response message.Note when the running time-frequency resource number of DL-SCH can not be divided exactly by K, can be divided into K approximately equalised part to DL-SCH.
Another method that the resource of shared data channel is divided in the base station is the ratio of base station according to the channel bit number of current each accidental access response message needs that will transmit, and DL-SCH is divided into K local channel resource.Attention is in order to reduce the overhead bit of indication DL-SCH dividing mode, and the ratio of the channel bit number that the base station need not need in strict accordance with each accidental access response message is divided.
In step c) of the present invention, the base station only takies the control information that control channel sends transmission of accidental access response message, the DL-SCH resource of distributing in the indication step b), is the DL-SCH resource division mode of a plurality of local channel resources and the control information of other transformats.
The base station can configure dedicated control channel send the information of the transmission means of control accidental access response message, also can be that the multiplexing L1/L2 control channel that is used for dispatching uplink and downlink resource is finished this function.When multiplexing L1/L2 control channel, the base station reserves that a special C-RNTI identifies this L1/L2 control channel transmission is control information to accidental access response message.The mode of multiplexing L1/L2 control channel is adopted in the hypothesis base station in below describing, and it is used in the situation of configure dedicated control channel equally.
In the step c) of the present invention, the divided information of the transmission DL-SCH that the indication information to the DL-SCH that distributes that sends in the L1/L2 control channel can imply; When subscriber equipment can not infer that fully current DL-SCH is divided into several sections and dividing mode according to the DL-SCH indication information in the L1/L2 control channel, the base station can further comprise the control information that relevant DL-SCH divides in the L1/L2 control channel.
In step d) of the present invention, the base station is added CRC and coding respectively to each arbitrary access front signal corresponding response information, and independent transmission in a part DL-SCH channel resource respectively.It should be noted that the base station can set transmitted power on each part DL-SCH resource respectively according to the CQI information of carrying in arbitrary access front signal.
In the step d) of the present invention, suppose that DL-SCH is divided into K local channel resource, for be identified at the response message that transmits in each local channel resource at arbitrary access front signal, a kind of method be in response message except other control informations, explicitly comprises the index information of the arbitrary access front signal of its response, for example, the number of supposing possible arbitrary access front signal is 64, and then this index need be represented with 6 bits.Another method is the index information of arbitrary access front signal of its response of transmission of implicit expression, and the present invention does not limit the method for this index information of transmission of concrete implicit expression.For instance, by arbitrary access front signal is mapped to different scrambler sequence one by one, and other response messages are carried out scrambling with this scrambler, thus the index of the transmitting random access preamble signal of implicit expression.The scrambling here can the is-symbol level scrambling, promptly each element of scrambler all is a plural number, thereby the response message after the modulation is carried out scrambling; Scrambling also can be the scrambling of bit-level, and promptly scrambler is a bit sequence, thereby to the bit sequence scrambling of other response messages of having added CRC.Especially, the length of supposing CRC is L, system can be mapped as the bit sequence that length is L to arbitrary access front signal, CRC is calculated to the arbitrary access front signal corresponding response information bit that each current detection arrives in the base station, be length that the bit sequence of L and the CRC bit that calculates are done the mask operation then, generally be mould 2 add operations, the CRC bit-level of base station after response message and mask is unified into a block of information and encodes and be mapped in the physical resource and send the information of having carried the index of arbitrary access front signal in the CRC bit that obtains like this.The method of another this index information of implicit transmission is that index bit and other response message bits of the arbitrary access front signal that arrives according to current detection calculate CRC, then other response messages and the CRC bit-level that calculates is unified into a block of information and encodes and be mapped in the physical resource and send.
The CQI information that the arbitrary access front signal that the base station is arrived according to current detection is entrained, response message bit-level joint groups equal CQI or approximately equalised several arbitrary access front signals become a block of information, and the block of information after the cascade is carried out combined coding and transmission.
The base station based on the first method that CQI information sends response message is: in step b), the base station is distributed the DL-SCH resource respectively to each group accidental access response message of dividing according to CQI information; Then in step c), the base station takies a L1/L2 control channel respectively to each group response message and indicates control informations such as the DL-SCH resource of distribution and transformat, and attention system need be reserved the corresponding respectively one group of accidental access response message dividing according to CQI information of a plurality of C-RNTI; Correspondingly in step d), the base station sends the accidental access response message of one group of combined coding respectively on the DL-SCH of each L1/L2 control channel indication.
The base station based on the second method that CQI information sends response message is: in step b), the DL-SCH resource is distributed according to the informational capacity of respectively organizing accidental access response message that is divided into according to CQI information in the base station, suppose that current accidental access response message is divided into K group according to CQI information, the base station correspondingly is divided into K local channel resource to this DL-SCH resource according to the resource that every group of response message needs; Then in step c), the base station only takies a L1/L2 control channel, be used to refer to the control information of all groups of the accidental access response message of dividing according to CQI information, specifically, the DL-SCH resource of distributing in the step b) is indicated in the base station in this L1/L2 control channel, comprise simultaneously the DL-SCH resource is divided into control informations such as the dividing mode of K local channel resource and transformat.Correspondingly in step d), the base station sends the accidental access response message of one group of combined coding respectively on each local channel resource of DL-SCH resource.
The operation of subscriber equipment:
A) arbitrary access front signal is selected and sent to subscriber equipment in Random Access Channel;
B) subscriber equipment detects the control channel of accidental access response message, obtain the base station assigns transmission of accidental access response message the DL-SCH resource, the DL-SCH resource division is the mode of several local channel resources and the information of other transformats;
C) whether subscriber equipment base stations detected in each local channel resource of the DL-SCH resource of control channel indication has sent the response message to its arbitrary access front signal;
D) subscriber equipment sends ascending control information on the ascending resource of base station assigned.
In step b) of the present invention, subscriber equipment detects each L1/L2 control channel with the C-RNTI of the indication accidental access response message that system reserves, when the C-RNTI that detects certain L1/L2 control channel is the C-RNTI of this reservation, subscriber equipment obtains the DL-SCH resource of all transmission of accidental access response message, and the information that sends indication DL-SCH resource division mode according to the number and the base station of the DL-SCH resource of base station assigns, obtaining the base station is the DL-SCH resource division several sections, be designated as K, obtain other control information simultaneously.
In step c) of the present invention, when the base station is when the DL-SCH resource is divided into K part, subscriber equipment detects the signal of this K local channel resource successively according to the bit number of its arbitrary access front signal corresponding response message, promptly attempts it is decoded; When the base station is divided into K part to the DL-SCH resource according to the ratio of the bit number of each response message of its transmission, subscriber equipment might judge that its response message only may transmit according to the bit number of its response message in the individual local channel of k (k is smaller or equal to K), thereby subscriber equipment only need detect the signal of this k local channel resource successively.If the CRC check of subscriber equipment in certain local channel resource is correct, subscriber equipment is thought and is detected the message that needs that the base station sends, if subscriber equipment has all been failed to the CRC check of this K local channel, subscriber equipment is thought random access procedure failure, need initiate this flow process again.
The base station is sent the first method of response message based on CQI information, in step b), the CQI information that subscriber equipment carries according to its arbitrary access front signal of selecting for use, C-RNTI with this CQI information of correspondence of reserving detects each L1/L2 control channel, when the C-RNTI that detects certain L1/L2 control channel is the C-RNTI of this reservation, subscriber equipment obtains the DL-SCH resource of all transmission of accidental access response message, obtains the control information of transformat etc. simultaneously.In step c), subscriber equipment is according to the signal in control informations such as DL-SCH resource of indicating in the L1/L2 control channel and the transformat decoding DL-SCH resource, when its CRC check is passed through, subscriber equipment judges that further the index of arbitrary access front signal of its selection is whether in decoded block of information, if subscriber equipment detects its index, subscriber equipment is thought and is detected the message that needs that the base station sends, if subscriber equipment does not detect its index, subscriber equipment is thought random access procedure failure, need initiate this flow process again.
The base station is sent the second method of response message based on CQI information, in step b) of the present invention, subscriber equipment detects each L1/L2 control channel with the C-RNTI of the indication accidental access response message that system reserves, when the C-RNTI that detects certain L1/L2 control channel is the C-RNTI of this reservation, subscriber equipment obtains the DL-SCH resource of all transmission of accidental access response message, and the information that sends indication DL-SCH resource division mode according to the number and the base station of the DL-SCH resource of base station assigns, obtaining the base station is the DL-SCH resource division several sections, be designated as K, obtain control informations such as transformat simultaneously.Subscriber equipment can judge that according to the entrained CQI information of the arbitrary access front signal of its selection its response message transmits in that local channel of this K local channel.
In step c), subscriber equipment detects the signal in the local channel resource at its response message place according to the information such as transformat of indicating in the L1/L2 control channel, when its CRC check is passed through, subscriber equipment judges that further the index of arbitrary access front signal of its selection is whether in decoded block of information, if subscriber equipment detects its index, subscriber equipment is thought and is detected the message that needs that the base station sends, if subscriber equipment does not detect its index, subscriber equipment is thought random access procedure failure, need initiate this flow process again.
Handle in the equipment drawing of accidental access response message the base station as shown in Figure 4, and wherein accidental access response message control information maker (401), accidental access response message encoder (402) and physical channel multiplexer (404) are embodiments of the present invention.As shown in Figure 4, the upward signal that the base station receives by transmission/receiving system (405) is also sent into physical channel demultiplexing module (406), in physical channel demultiplexing module (406), the base station demultiplexing goes out the arbitrary access front signal (407) that possible subscriber equipment sends; When the base station detects one or more arbitrary access front signal, the base station generates its control information (401) when sending accidental access response message according to method of the present invention, CRC and coding (402) are added to accidental access response message in the base station in the accidental access response message encoder simultaneously, after physical channel multiplexer module (404) is multiplexing, send then by transmission/receiving system (405).Then, the base station goes out the ascending control information (408) that subscriber equipment sends through transmission/receiving system (405) demultiplexing in physical channel demultiplexing module (406); Receive the ascending control information of subscriber equipment when the base station after, the base station generates L2/L3 response message (403), after physical channel multiplexer module (404) is multiplexing, sends by transmission/receiving system (405).
Subscriber equipment is handled the equipment drawing of random access procedure as shown in Figure 5, and wherein accidental access response message control information resolver (501), accidental access response message decoder (502) and physical channel demodulation multiplexer (504) are embodiments of the present invention.As shown in Figure 5, arbitrary access front signal (507) is at first selected and generated to subscriber equipment, sends through physical channel multiplexer (506) and transmission/receiving system (505) then.The then downstream signal that receives by transmission/receiving system (505) of subscriber equipment and send into physical channel demultiplexing module (504), in physical channel demultiplexing module (504), according to method of the present invention, the subscriber equipment demultiplexing goes out the control information of the accidental access response message of possible base station transmission, and whether base stations detected has sent the control information of accidental access response message in module (501), and resolve this control information; Detect the control information of accidental access response message when subscriber equipment after, further detect the data message of accidental access response message, subscriber equipment judges whether the base station is that it has sent response message in module (502); When subscriber equipment detected the base station and sent response message for it, subscriber equipment maker ascending control information (508) sent through physical channel multiplexer (506) and transmission/receiving system (505) then.Next subscriber equipment goes out the base station demultiplexing through transmission/receiving system (505) demultiplexing in physical channel demultiplexing module (504) and goes out the downstream response information that the base station sends.
Embodiment
This part has provided two embodiment of this invention, too tediously long for fear of the description that makes this patent, in the following description, has omitted the detailed description of other functions that public is known or device etc.
First embodiment
In the present embodiment, the base station sends control information to accidental access response message with L1/L2 control channel, and a DL-SCH who distributes is divided into several local channels sends an accidental access response message respectively.Here suppose the response message of the current transmission in base station to 3 arbitrary access front signals.
Fig. 6 is the structural representation of accidental access response message in the present embodiment.As shown in Figure 6, the DL-SCH resource is distributed according to the amount of information of accidental access response message in the base station, and hypothesis base station assigns Resource Block (612,614 and 616) is used for transmission of accidental access response message among the figure.It should be noted that Fig. 6 is the logical construction of resource block assignments, be used to represent that base station assigns part Resource Block is used for transmission response message, the Resource Block that does not limit distribution here is local formula Resource Block or distributed resource blocks.Because the base station need send 3 accidental access response messages, so the base station is the DL-SCH resource division three local channel resources further.Next, the base station generates L1/L2 control signaling (600), here to identify this control signaling with a C-RNTI (601) who reserves be the response message that inserts at random in the base station, the indication information (602) that in the control signaling, comprises the DL-SCH resource (612,614 and 616) of distribution, comprising other control informations (603) simultaneously, can be to be the DL-SCH resource division information of dividing mode of 3 part resources or information of transformat etc.Next, the base station sends these 3 response messages (604,605 and 606) respectively in each local channel resource of the DL-SCH of its distribution resource (612,614 and 616).CRC and coding are independently added to each response message respectively in the base station, are mapped to then in the local channel resource to send, and noting here can be the transmission of the index information implicit expression of arbitrary access front signal.
During subscriber equipment receiving random access response message, subscriber equipment at first detects L1/L2 control channel (600); When subscriber equipment detects the C-RNTI (601) of reservation, subscriber equipment reads indication information (602) and other control informations (603) of the DL-SCH resource in the control signaling, thereby subscriber equipment can be analyzed and obtain the DL-SCH Resource Block that the current base station branch is used in accidental access response message is (612,614 and 616), and these DL-SCH further are divided into 3 part resources; Next subscriber equipment detects each possible response message (604,605 and 606) successively, judges whether the base station has sent the response message to it.
Second embodiment
In the present embodiment, divide into groups corresponding response message according to the CQI information that arbitrary access front signal carries in the base station, and every group of response message combined coding.Suppose that the base station sends control information to accidental access response message with L1/L2 control channel, and the DL-SCH that distributes is divided into several local channels sends each group accidental access response message of dividing according to CQI respectively.Here suppose that the base station is divided into two groups to accidental access response message according to CQI information.
Fig. 7 is the structural representation of accidental access response message in the present embodiment.As shown in Figure 7, the DL-SCH resource is distributed according to the amount of information of accidental access response message in the base station, and hypothesis base station assigns Resource Block (712,714 and 716) is used for transmission of accidental access response message among the figure.It should be noted that Fig. 7 is the logical construction of resource block assignments, be used to represent that base station assigns part Resource Block is used for transmission response message, the Resource Block that does not limit distribution here is local formula Resource Block or distributed resource blocks.Because the base station is divided into two groups to accidental access response message according to CQI information, so the base station is the DL-SCH resource division two local channel resources further.Next, the base station generates L1/L2 control signaling (700), here to identify this control signaling with a C-RNTI (701) who reserves be the response message that inserts at random in the base station, the indication information (702) that in the control signaling, comprises the DL-SCH resource (712,714 and 716) of distribution, comprising other control informations (703) simultaneously, can be to be the DL-SCH resource division information of dividing mode of two part resources or information of transformat etc.Next, the base station sends these two groups of response messages (704 and 705) respectively in each local channel resource of the DL-SCH of its distribution resource (712,714 and 716).The base station is cascaded into a block of information to the information bit of every group of response message, adds CRC and combined coding then, then is mapped in the local channel resource to send.
During subscriber equipment receiving random access response message, subscriber equipment at first detects L1/L2 control channel (700); When subscriber equipment detects the C-RNTI (701) of reservation, subscriber equipment reads indication information (702) and other control informations (703) of the DL-SCH resource in the control signaling, thereby subscriber equipment can be analyzed and obtain the DL-SCH Resource Block that the current base station branch is used in accidental access response message is (712,714 and 716), and these DL-SCH further are divided into two part resources; The corresponding response message group of reporting when next sending arbitrary access front signal of CQI demodulates information according to it, promptly or be response message group (604), or response message group (606), judge whether the base station has sent the response message to it.
Claims (33)
1. the method for a base station transmits accidental access response message comprises the steps:
A) possible arbitrary access front signal is detected in the base station in Random Access Channel;
B) the used descending shared data channel DL-SCH resource of base station assigns transmission of accidental access response message, and it is divided into one or more local channel resource;
C) base station transmits down control channel, is the DL-SCH resource division control informations such as the mode of several local channel resources and other transformats at the DL-SCH resource that indication distributes;
D) base station is provided with suitable power and sends accidental access response message in each local channel resource of the DL-SCH resource of control channel indication.
2. method according to claim 1 is characterized in that also comprising that the base station carries out absolute coding and transmission respectively to the response message of each arbitrary access front signal.
3. method according to claim 1, it is characterized in that also comprising the base station according to current detection to the entrained CQI information of targeting signal that receives at random, response message bit-level joint groups equal CQI or approximately equalised several arbitrary access front signals become a block of information, and the block of information after the cascade is carried out combined coding and transmission.
4. method according to claim 1 is characterized in that in step b), and the DL-SCH resource is distributed according to the informational capacity of all accidental access response messages that current needs send in the base station.
5. method according to claim 1 is characterized in that in step b), and the base station is divided into K local channel resource to this DL-SCH resource, supposes that here the number of the current accidental access response message that need transmit is K.
6. method according to claim 5 is characterized in that, the base station is divided into K local channel resource to the shared data channel.
7. method according to claim 5 is characterized in that, the base station is divided into K local channel resource to DL-SCH according to the ratio of the channel bit number of current each accidental access response message needs that will transmit.
8. method according to claim 1 is characterized in that in step c), and the base station only takies the control information that a control channel sends transmission of accidental access response message.
9. method according to claim 8 is characterized in that, during the multiplexing L1/L2 control channel in base station, and what reserve that a special C-RNTI identifies this L1/L2 control channel transmission is control information to accidental access response message.
10. method according to claim 1 is characterized in that in step c), the divided information of the transmission DL-SCH that the indication information of DL-SCH can imply.
11. method according to claim 1 is characterized in that in step c), the base station comprises the control information that relevant DL-SCH divides in the L1/L2 control channel.
12. method according to claim 1 is characterized in that in step d), the base station is added CRC and coding respectively to each arbitrary access front signal corresponding response information, and independent transmission in a part DL-SCH channel resource respectively.
13. method according to claim 12 is characterized in that, the transmitted power on the CQI information setting part DL-SCH resource that carry according to arbitrary access front signal the base station.
14. method according to claim 12 is characterized in that, the base station explicitly comprises the index information of the arbitrary access front signal of its response.
15. method according to claim 12 is characterized in that, the index information of the arbitrary access front signal of its response of transmission of base station implicit expression.
16. method according to claim 1 is characterized in that in step b), the base station is distributed the DL-SCH resource respectively to each group accidental access response message of dividing according to CQI information.
17. method according to claim 1 is characterized in that in step c), the base station takies a L1/L2 control channel respectively to each group response message of dividing according to CQI information and indicates control informations such as the DL-SCH resource of distribution and transformat.
18. method according to claim 17 is characterized in that, system need reserve the corresponding respectively one group of accidental access response message dividing according to CQI information of a plurality of C-RNTI.
19. method according to claim 1 is characterized in that in step d), the base station sends the accidental access response message of one group of combined coding respectively on the DL-SCH of each L1/L2 control channel indication.
20. method according to claim 1 is characterized in that in step b), the DL-SCH resource is distributed according to the informational capacity of respectively organizing accidental access response message that is divided into according to CQI information in the base station.
21. method according to claim 1 is characterized in that in step b), the base station is divided into K local channel resource to this DL-SCH resource, supposes that here current accidental access response message is divided into K group according to CQI information.
22. method according to claim 1 is characterized in that in step c), the base station only takies a L1/L2 control channel, is used to refer to the control information of all groups of the accidental access response message of dividing according to CQI information.
23. method according to claim 1 is characterized in that in step d), the base station sends the accidental access response message of one group of combined coding respectively on each local channel resource of DL-SCH resource.
24. a subscriber equipment is handled the method for accidental access response message, comprises the steps:
A) arbitrary access front signal is selected and sent to subscriber equipment in Random Access Channel;
B) subscriber equipment detects the control channel of accidental access response message, obtain the base station assigns transmission of accidental access response message the DL-SCH resource, the DL-SCH resource division is the mode of several local channel resources and the information of other transformats;
C) whether subscriber equipment base stations detected in each local channel resource of the DL-SCH resource of control channel indication has sent the response message to its arbitrary access front signal;
D) subscriber equipment sends ascending control information on the ascending resource of base station assigned.
25. method according to claim 24 is characterized in that in step b), subscriber equipment detects each L1/L2 control channel with the C-RNTI of the indication accidental access response message that system reserves.
26. method according to claim 24, it is characterized in that in step b), subscriber equipment sends the information of indicating DL-SCH resource division mode according to the number and the base station of the DL-SCH resource of base station assigns, and obtaining the base station is the DL-SCH resource division several sections.
27. method according to claim 24, it is characterized in that in step c), when the DL-SCH resource was divided into K part, subscriber equipment detected the signal of this K local channel resource successively according to the bit number of its arbitrary access front signal corresponding response message.
28. method according to claim 24, it is characterized in that in step c), when the base station is divided into K part to the DL-SCH resource according to the ratio of the bit number of each response message of its transmission, subscriber equipment judges that according to the bit number of its response message its response message transmits in the individual local channel of k (k is smaller or equal to K), thereby subscriber equipment only need detect the signal of this k local channel resource successively.
29. method according to claim 24 is characterized in that in step b), the CQI information that subscriber equipment carries according to its arbitrary access front signal of selecting for use detects each L1/L2 control channel with the C-RNTI of this CQI information of correspondence of reserving.
30. method according to claim 24 is characterized in that in step b), the CQI information that subscriber equipment is entrained according to the arbitrary access front signal of its selection judges that its response message transmits at a local channel of DL-SCH resource.
31. method according to claim 24 is characterized in that in step c), subscriber equipment detects the signal in the local channel resource at its response message place.
32. the equipment of a base station transmits accidental access response message comprises transmission/reception, also comprises:
A) accidental access response message control information maker is used to generate the Downlink Control Information when sending accidental access response message;
B) accidental access response message encoder is used for accidental access response message is added CRC and coding;
C) physical channel Multiplexing module is used for the down control channel accidental access response message, shared data channel and other physical channels of accidental access response message is multiplexed into together;
D) physical channel demultiplexing module is used for demultiplexing and goes out arbitrary access front signal or other control informations that possible subscriber equipment sends;
E) descending control messages maker is used to generate descending control messages.
33. a subscriber equipment is handled the equipment of accidental access response message, comprises transmission/reception, also comprises:
A) accidental access response message control information resolver is used for the control information whether base stations detected has sent accidental access response message, and resolves this control information;
B) accidental access response message decoder is used to resolve the data channel of accidental access response message, judges whether the base station is that it has sent response message;
C) physical channel demultiplexing module is used for control signaling and data message that demultiplexing goes out accidental access response message, and other Downlink Control Information;
D) physical channel Multiplexing module is used for arbitrary access front signal, ascending control information and other physical channels are multiplexed into together;
E) arbitrary access front signal maker module is used for selecting and generating arbitrary access front signal.
F) uplink control message maker is used to generate uplink control message.
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| CNA2006101438466A CN101175309A (en) | 2006-11-02 | 2006-11-02 | Device and method for transmission of accidental access response message |
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