WO2009117930A1

WO2009117930A1 - Method and device for mapping between service channel resources and control channels

Info

Publication number: WO2009117930A1
Application number: PCT/CN2009/070902
Authority: WO
Inventors: 郑创明; 邓敏智
Original assignee: 华为技术有限公司
Priority date: 2008-03-24
Filing date: 2009-03-20
Publication date: 2009-10-01
Also published as: CN101547068B; CN101547068A

Abstract

A method and device for mapping between the service channel resources and the control channels. The mapping method comprises that the multiple control channels are formed into a control channel group and the basenode numbers of the service channels which the control channels in the control channel group correspond to are noncontinuous; the control channels are mapped to the forward link control segment FLCS resources and the control channels in the control channel group multiplex the same FLCS resources. By changing the mapping relation between the control channels and the service channel resources, the resources multiplexing of the control channels is more randomized and the multiplexing efficiency of the control channels will not be changed due to the size of resources distributed by AT and the multiplexing efficiency of the control channels is increased.

Description

Method and device for mapping traffic channel resources and control channels. The present application claims to be submitted to the Chinese Patent Office on May 9, 2008, application number 200810096457.1, and the invention name is "a mapping method and device for traffic channel resources and control channels". Chinese Patent Application for Chinese Patent Application, and Chinese Patent Application No. 200810085796.X, filed on March 24, 2008, entitled "A Method and Apparatus for Mapping Traffic Channels and Control Channels" . The entire contents of the above two patents are incorporated herein by reference. Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a method and an apparatus for mapping traffic channel resources and control channels. Background technique

HARQ (Hybrid Automatic Retransmission Request) technology is an important technology in the data transmission process of mobile communication services. Currently, LTE (Long Term Evolution) and AIE (Air Interface Evolution) are both The HARQ technology is used to transmit service packet data. In the HARQ process, when a certain service flow determines that the HARQ mechanism needs to be adopted after negotiation, the base station schedules the service, and determines according to the characteristics of the system and the service and the current channel condition of the AT (Access Terminal). It uses the scheduling parameters such as interface parameters and extended frame parameters, and sends them in the assignment message of the forward control channel. Then, at the physical layer, the modulation command used by each HARQ is retrieved according to the used packet format, and the code is modulated and transmitted in the air interface.

Finally, after receiving the service data packet, the receiving end performs demodulation decoding and bit merging according to the negotiated HARQ parameter, and finally performs CRC (Cyclic Redundancy Check) and feedback AC/NAK (Non-acknowledgement) information. Enter the next HARQ transmission or send a new packet transmission.

A wireless communication system based on OFDMA (Orthogonal Frequency Division Multiple Access) generally divides a channel that can be used for transmitting traffic into a plurality of minimum scheduling units according to frequency, which is called a BaseNode, and each The BaseNode corresponds to a certain bandwidth. In order to perform feedback reception on the traffic channel, one or more BaseNodes correspond to one ACK channel, and are used for The bearer receives the demodulation correctness information. The correspondence between the ACK channel and the BaseNode can be mapped according to a certain method.

In the air interface technology of the UMB (Ultra Mobile Broadband), the FACKCH (Forward Acknowledgement Channel) occupies resources in the FLCS (Forward Link Control Segment) before transmitting the ACK. , AN (Access Network, access network) First determine the number of ACKs to be transmitted N _{FACKC1HNDICES} , and then leave a corresponding size of resources in the FLCS. The resource indexing method transmitted in each forward physical frame is:

0~NFACKCH-INDICES― 1.

The information carried by each FACKCH is subjected to DFT (Discrete Fourier Transformation) spreading and scrambling operation to generate a complex sequence of length 12, and the complex sequence of length 12 is transmitted in three frequency hopping regions, each Four modulation symbols are transmitted in the hopping area, occupying a 2x2 resource location.

However, in the process of implementing the present invention, the inventors have found that the prior art has at least the following problems: In the resource allocation of the FACKCH, the resource multiplexing efficiency of the AT corresponding FACKCH which allocates many reverse traffic channel resources is low. Summary of the invention

The embodiments of the present invention provide a method and a device for mapping a traffic channel resource and a control channel, so as to improve multiplexing efficiency of a control channel that multiplexes the same time-frequency resource.

An embodiment of the present invention provides a method for mapping a traffic channel resource and a control channel, including: grouping multiple control channels into one control channel group, and the base node number of the traffic channel corresponding to the control channel in the control channel group is non- Continuously mapping the control channel to the forward link control segment FLCS resource, the control channel in the control channel group multiplexing the same FLCS resource.

On the other hand, an embodiment of the present invention further provides a mapping device for a traffic channel resource and a control channel, including: a packet module, configured to group multiple control channels into one control channel group, where the control channel in the control channel group corresponds to a base node number of the traffic channel is non-contiguous; a mapping module, configured to map the control channel to a forward link control segment FLCS resource, where control channel multiplexing in the control channel group divided by the packet module is the same FLCS resources.

In the embodiment of the present invention, a plurality of control channels are grouped into one control channel group, and a base node of a traffic channel corresponding to a control channel in each control channel group is discontinuous (ie, interval or random), and the control is performed. The channel group multiplexes the same FLCS resources, thereby changing the correspondence between the control channel and the traffic channel resources, and improving the multiplexing efficiency of the control channel. DRAWINGS

1 is a flowchart of Embodiment 1 of a method for mapping a traffic channel resource and a control channel according to the present invention; FIG. 2 is a structural diagram of Embodiment 1 of a device for mapping a traffic channel resource and a control channel according to the present invention;

1 ;

2(b) is a structural diagram of Embodiment 1 of a mapping device for a traffic channel resource and a control channel according to the present invention;

2;

FIG. 3 is a structural diagram of Embodiment 2 of a device for mapping a traffic channel resource and a control channel according to the present invention. detailed description

The embodiment of the invention provides a mapping method between a traffic channel resource and a control channel, so that the BaseNode number of the traffic channel corresponding to the control channel of the multiplexed adjacent frequency resource is discontinuous. The control channel in the embodiment of the present invention is a type of channel related to a traffic channel resource, such as a FACKCH, a FSPCH (Forward Start of Packet Channel), and the like, and in each embodiment of the present invention, a FACKCH is taken as an example. It is to be noted that the techniques provided in the embodiments of the present invention are similar to those in other types of channels, and are not described herein.

There are two implementation manners in the embodiment of the present invention. The first method is that the BaseNode number of the traffic channel corresponding to the control channel multiplexed with the same time-frequency resource is interval, and the second mode is that the control channel corresponding to the same time-frequency resource is multiplexed. The BaseNode number of the traffic channel is random, that is, the BaseNode numbers of more than two traffic channels are spaced.

There are two ways to implement the first method. One method is that the BaseNode of the traffic channel and the FACKCH index are mapped in a continuous manner. In the FACKCH to FLCS resource mapping, one FACKCH is taken out at every other interval in the control channel sorted according to the index. The FACKCH in each FACKCH group multiplexes the same FLCS resource, that is, implements the same time-frequency resource in the FACKCH in each FACKCH group. Another method is to change the mapping method of the BaseNode and the FACKCH index of the traffic channel, and the traffic channel BaseNode corresponding to one or more traffic channels of the BaseNode corresponds to one FACKCH index, and when the FACKCH is mapped to the FLCS, the selected FACKCH index is adjacent. One or more FACKCH indexes corresponding to the FACKCH are grouped into a group, each The FACKCH in the FACKCH group multiplexes the same FLCS resources. Both of these methods can make the multiplexing efficiency of the FACKCH resource not change due to the resource size allocated by the AT, and improve the demodulation performance of the channel.

There are also two methods for implementing the second method. The first method is that the BaseNode of the traffic channel and the FACKCH index are mapped in a continuous manner. When the resource mapping of the FACKCH to the FLCS is performed, a replacement sequence is generated for the control channel index. The permutation sequence generates a control channel group such that the base node numbers corresponding to the FACKCH of each group are not consecutive, and the permutation sequence may be static or dynamically changed, and the FACKCH in each FACKCH group multiplexes the same FLCS resource. The second method is to change the mapping method of the BaseNode and the FACKCH index of the traffic channel, and first obtain a permutation sequence, which may be static or dynamic, and the mapping relationship between the BaseNode and the FACKCH index of the traffic channel is replaced by The sequence is mapped, so that the FACKCH index mapped by the BaseNode of the continuous traffic channel is discontinuous. When the FACKCH is mapped to the FLCS, the FACKCH corresponding to one or more adjacent FACKCH indexes in the selected FACKCH index is divided into one. Group, FACKCH in each FACKCH group multiplexes the same FLCS resource.

Since the FACKCH in each FACKCH group multiplexes the FLCS resources, the same time-frequency resources are multiplexed by code division multiplexing. Therefore, both methods can make the multiplexing efficiency of the FACKCH resources not be affected by the AT. The allocated resource size changes, improving the demodulation performance of the channel.

The implementation process of the above method is described by four specific embodiments:

As shown in FIG. 1 , a flowchart of Embodiment 1 of a method for mapping a service channel resource and a control channel according to the present invention includes the following steps:

Step S101: The multiple FACKCHs are grouped into one FACKCH group, and the BaseNode number of the traffic channel corresponding to the FACKCH in the FACKCH group is discontinuous. Specifically, it can be:

The BaseNode of the traffic channel and the FACKCH index are mapped in a continuous manner, and one FACKCH is taken every other interval to form a group, and the FACKCH in each FACKCH group multiplexes the same FLCS resource. The mapping algorithm of the FACKCH index and the BaseNode containing the available subcarriers is specifically:

(1) The number of BaseNodes containing available subcarriers is 0, 1 , ..., N, and each FACKCH corresponds to k BaseNodes;

(2) The FACKCH index number is 0, 1 , ... , n, where (n+l ) k > = N;

(3) When the FACKCH index number is 0, the corresponding BaseNode number is 0, 1 , ... K-1 ; When the FACKCH index number is 1, the corresponding BaseNode number is k, k+1, 2k-1, and so on.

Step SI 02, mapping the FACKCH to the FLCS resource, wherein the FACKCH in each FACKCH group multiplexes the same FLCS resource. In the following description, for convenience of description, let A = 4, M is equal to g in step (3) below, and the calculation process of FACKCH in UMB is taken as an example. Specifically, it may be:

Calculating a modulation symbol transmitted by each FACKCH;

The mapping position when the FACKCH is mapped to the FLCS resource is calculated according to the modulation symbol transmitted by each FACKCH and the index of the FACKCH. The FACKCH is then mapped to the FLCS resource according to the calculated mapping location.

FACKCH each channel, and scrambling the DFT operation for generating a complex sequence of length 12, may be expressed as {Zoo, Zoi, Zo2, Z 10, Zn, Z 12, Z 20, Z 21, Z 22, Z 30, Z ₃₁ , Z ₃₂ }, transmitted in three megaband regions, and four modulation symbols are transmitted in each hopping region, and the four modulation symbols occupy a 2x2 resource position.

The FACKCH signal generation and resource mapping methods are as follows:

(1) Generate a signal a to be transmitted on the FACKCH. If the value of the forward ACK FACKVAL = 0, that is, the negative NAK is sent on the FACKCH, then a = 0; if FACKVAL is not equal to 0, then a=exp((2^/3) * FACKVAL)

(2) generating a scrambling code sequence according to a predetermined rule, and the scrambling code sequence of length 3 is [Υο Υ! Y ₂ ]

(3) Determine the resource mapping location of the FACKCH. Specifically:

g = ceil( N /4 ) , r = floor( FACKCH _INDEX / g ) , R _FA CK-TRANS = ( FACKCHi _nd ex mod g ). Where ceil means rounding up, floor means rounding down, R _FAa ^ _TRANS is the starting position of mapping of 4 modulation symbols transmitted on each subcarrier in each frequency hopping region, r is in each frequency hopping area The amount of change in the mapped position of the transmitted four modulation symbols on the subcarriers.

NFACKCH-INDICES

Is the total index number of FACKCH.

(4) Find a complex sequence of length 12 specifically: Z, = a / corpse - 0 ≤ i < 4, 0 ≤ j < 3, where /^^^ is the transmit power of the FACKCH.

The generated 12 complex sequences are respectively transmitted on the i th resource elements of the j 2 X 2 resources.

The method for mapping the service channel resource and the control channel of the present invention is the same as that of the first embodiment, but the specific implementation manner is different, specifically:

Step (3) of step S101 is changed to: M is the interval width, and A is the multiplexing of the same FLCS resource.

The maximum number of FACKCHs, when the FACKCH index number is 0, the corresponding BaseNode number is 0, 1, k-1; When the FACKCH index number is 1, the corresponding BaseNode number is M k, Mk+1, Mk+ K-1; When the FACKCH index number is 2, the corresponding BaseNode number is 2Mk, 2Mk+l, 2Mk+kl; ; When the FACKCH index number is A-1, the corresponding BaseNode number is (A-1) Mk, ( A-1 ) Mk + l, ..., ( A-1 ) Mk + kl; when the FACKCH index number is A, the corresponding BaseNode number is k, k+1, 2k-1; analogy.

Step (3) of step S102 is changed to: Determine the resource mapping position of the FACKCH, specifically: g

=

4xfloor ( FACKCH _INDEX

/4). Where ceil is rounded up, floor is rounded down, R _FACK _ _TRANS is the starting position of the four modulation symbols transmitted in each hopping region on the subcarrier, r is within each hopping region The amount of change in the mapped position of the transmitted four modulation symbols on the subcarriers.

NFACKCH-INDICES

Is the total index number of FACKCH.

Step 101 is identical to the first embodiment, and step (3) of step 102 is changed to:

(3) First, a permutation sequence a[n] is obtained. The permutation sequence is generated by permuting the FACKCH indices 0, 1, ..., n, and the length of the sequence is n+1, assuming &[11] = [8] , 3,7,15,0, ..... ], where r = i mod 4 , RFACK-TRANS = 4xfloor ( i /4 ), where i is the index of the element in the permutation sequence a[n].

Step (3) of step 101 is changed to: first obtain a permutation sequence a[n], and the permutation sequence is to 0. 1 , ... , n, produced by permutation, the length of the sequence is n+1, assuming a[n] = [8 , 3 , 7 , 15 0 ..... ], then the FACKCH index number is 0 The corresponding BaseNode is numbered (8-l)k+0.

(8-l)k+l , (8-l)k+kl ; When the FACKCH index number is 1, the corresponding BaseNode number is (3-l)k+0, (3-l)k+l , ( 3-l)k+kl; and so on.

Step (3) of step 102 is changed to: Determine the resource mapping position of the FACKCH, specifically: g = ceil(N _{FACKCH CES} /4 ) , r = FACKCH _tadex mod 4 , RFACK-TRANS = 4 x floor ( FACKCH _Index /4 ). Where ceil is rounded up, floor is rounded down, R _FACK _ _TRANS is the starting position of the four modulation symbols transmitted in each hopping region on the subcarrier, r is within each hopping region The amount of change in the mapped position of the transmitted four modulation symbols on the subcarriers.

NFACKCH-INDICES

Is the total index number of FACKCH.

The embodiment of the present invention changes the mapping method of the BaseNode and the FACKCH index of the traffic channel, so that the consecutively numbered BaseNodes and the corresponding FACKCHs are transmitted on different time-frequency resources, so that the resource multiplexing of the FACKCH is not affected by the resource allocated by the user. The impact of the FACKCH is improved.

As shown in FIG. 2( a ), FIG. 1 is a structural diagram 1 of a first embodiment of a mapping apparatus for a traffic channel resource and a control channel according to the present invention, including:

The grouping module 21 is configured to group the plurality of control channels into one control channel group, and the BaseNode of the traffic channel corresponding to the control channel in the control channel group is discontinuous;

The mapping module 22 is configured to map the control channel to the FLCS resource, and the control channel in the control channel group divided by the grouping module 21 multiplexes the same FLCS resource.

The grouping module 21 includes: an index continuous mapping sub-module 211, configured to map the BaseNode of the traffic channel and the index of the control channel in a continuous manner;

The interval grouping sub-module 212 is configured to take out one control channel every other interval to form a group, and the control channel in each control channel group multiplexes the same FLCS resource.

Or, as shown in FIG. 2(b), FIG. 2 is a structural diagram of Embodiment 1 of a mapping apparatus for a traffic channel resource and a control channel according to the present invention. The packet module 21 includes an index continuous mapping sub-module 211, which is used for a BaseNode of a traffic channel. The index with the control channel is mapped in a continuous manner; the random packet sub-module 215 is configured to perform grouping on the FACKCH index or to map the FACKCH to the FLCS resource. Group, the BaseNode corresponding to the FACKCH that multiplexes the same time-frequency resource is random.

As shown in FIG. 3, it is a structural diagram of a second embodiment of a mapping device for a traffic channel resource and a control channel according to the present invention. The difference between the traffic channel resource and the control channel mapping device proposed in the first embodiment is that the grouping module 21 includes: The index selection sub-module 213 is configured to take out a control channel index corresponding to the service channel BaseNode every certain service channel BaseNode, or randomly extract a traffic channel BaseNode corresponding to the control channel index;

The adjacent packet sub-module 214 is configured to group the control channels corresponding to one or more control channel indexes in the control channel index selected by the index selection sub-module 213 into a group, and control channel multiplexing in each control channel group. The same FLCS resource.

The foregoing control channel is a type of channel related to a traffic channel resource, including a FACKCH or an FSPCH, but the FACKCH is taken as an example for description.

In the embodiment of the present invention, the grouping module 21 combines a plurality of FACKCHs into one FACKCH group, and the resource BaseNode corresponding to the FACKCH in the FACKCH group is non-contiguous. Specifically, the index continuous mapping sub-module 211 maps the BaseNode of the traffic channel and the FACKCH index in a continuous manner, and the interval packet sub-module 212 fetches one FACKCH every other interval, and the FACKCH in each FACKCH group. The same contiguous FLCS resource is multiplexed; or, the index contiguous mapping sub-module 211 maps the BaseNode of the traffic channel and the index of the control channel in a continuous manner, and the random packet sub-module 215 performs grouping of the FACKCH index or mapping the FACKCH to the FLCS resource. Grouping, so that the BaseNode corresponding to the FACKCH that multiplexes the same time-frequency resource is random; or

The index selection sub-module 213 extracts a FACKCH index corresponding to the service channel BaseNode every certain service channel BaseNode, or randomly extracts a FACKCH index corresponding to the traffic channel BaseNode, and before the FACKCH is mapped to the FLCS, the adjacent packet sub-module 214 The FACKCH corresponding to one or more adjacent FACKCH indexes in the selected FACKCH index is grouped into one group, and the FACKCH in each FACKCH group multiplexes the same FLCS resource.

The FACKCH is then mapped by the mapping module 22 onto the FLCS resources, where the FACKCH in each FACKCH group multiplexes the same FLCS resources.

For the mapping device of the traffic channel resource and the control channel, the packet module 21 groups the multiple FACKCHs into one FACKCH group, and the BaseNode of the traffic channel corresponding to the control channel in each FACKCH group is discontinuous, thereby changing the ^ACKCH and the traffic channel resources. Mapping relationship The multiplexing efficiency of the FACKCH is not changed by the resource size allocated by the AT, and the multiplexing efficiency of the FACKCH is improved.

The above modules may be distributed in one device or distributed in multiple devices. The above modules can be combined into one module, or can be further split into multiple sub-modules.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for making a A computer device (which may be a personal computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.

Those skilled in the art will appreciate that the drawings are only a schematic representation of a preferred embodiment, and that the modules or processes in the drawings are not necessarily required to practice the invention.

It will be understood by those skilled in the art that the modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment as described in the embodiments, or may be correspondingly changed in one or more apparatuses different from the embodiment. The modules of the above embodiments may be combined into one module, or may be further split into a plurality of sub-modules.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

The above disclosure is only a few specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims

Rights request

A method for mapping a traffic channel resource and a control channel, comprising: grouping a plurality of control channels into one control channel group, wherein a base node number of a traffic channel corresponding to a control channel in the control channel group is discontinuous of;

The control channel is mapped onto the forward link control segment FLCS resource, and the control channel in the control channel group multiplexes the same FLCS resource.

The method for mapping a traffic channel resource and a control channel according to claim 1, wherein the plurality of control channels form a control channel group, and a base of a traffic channel corresponding to the control channel in the control channel group The node number is non-contiguous including:

The base node of the traffic channel and the index of the control channel are mapped in a continuous manner; in the control channel sorted according to the index, one control channel is taken out at every other interval to form a control channel group;

Or, the base node of the traffic channel and the index of the control channel are mapped in a continuous manner; and the control channel is randomly taken out from the control channel to form a control channel group.

The method for mapping a traffic channel resource and a control channel according to claim 2, wherein the randomly extracting a control channel from the control channel to form a control channel group comprises:

Performing a permutation sequence randomly according to an index of the control channel, where the total number of permutation sequences is the same as the total number of control channel groups, and the length of each permutation sequence is the same as the number of control channels in the corresponding control channel group;

The control channels are grouped according to the permutation sequence such that the base node numbers corresponding to the control channels of each group are not continuous.

The method for mapping a traffic channel resource and a control channel according to claim 1, wherein the plurality of control channels form a control channel group, and the base of the traffic channel corresponding to the control channel in the control channel group The node number is non-contiguous including:

The control channel index corresponding to the base node of the traffic channel is taken out at a certain service channel base node, and the control channel corresponding to one or more adjacent control channel indexes in the selected control channel index is formed into a control channel group.

The method for mapping a traffic channel resource and a control channel according to claim 1, wherein the plurality of control channels form a control channel group, and the control channel in the control channel group corresponds to The base node number of the traffic channel is non-contiguous including:

The base node of the traffic channel and the control channel are mapped in a random manner; and the control channels corresponding to one or more adjacent control channel indexes in the mapped control channel index are grouped into one control channel group.

The method for mapping a traffic channel resource and a control channel according to claim 5, wherein mapping the base node of the traffic channel and the index of the control channel in a random manner comprises: using one for a group of base nodes The random permutation sequence is mapped to the control channel index.

7. The method for mapping traffic channel resources and control channels according to claim 3 or 6, wherein the permutation sequence is static or varies with time.

The method for mapping a traffic channel resource and a control channel according to any one of claims 1 to 6, wherein the control channel comprises: a forward acknowledgement channel FACKCH or a forward packet start channel FSPCH.

A device for mapping a traffic channel resource and a control channel, comprising: a packet module, configured to form a plurality of control channels into one control channel group, and a traffic channel corresponding to the control channel in the control channel group The base node number is non-contiguous;

And a mapping module, configured to map the control channel to a forward link control segment FLCS resource, where a control channel in the group of control channel divisions multiplexes the same FLCS resource.

The device for mapping a traffic channel resource and a control channel according to claim 9, wherein the grouping module comprises:

An index continuous mapping submodule, configured to map the base node of the traffic channel and the index of the control channel in a continuous manner;

And an interval grouping submodule, configured to take one control channel to form a group at every other interval in the control channel sorted according to an index.

The mapping device of the traffic channel resource and the control channel according to claim 9, wherein the grouping module comprises:

A random packet sub-module for grouping control channel indices or grouping control channels into FLCS resources.

12. The apparatus for mapping a service information if resource and a control channel according to claim 9, wherein: The grouping module includes:

An index selection sub-module, configured to: at a certain service channel base node, extract a control channel index corresponding to the service channel base node, or randomly extract a service channel base node corresponding to a control channel index;

And a neighboring grouping sub-module, configured to form, by the control channel index selected by the index selection sub-module, a control channel corresponding to one or more control channel indexes to form a control channel group.